* [PATCH 4.4 01/43] MIPS: Fix ioremap() RAM check
2018-07-16 7:36 [PATCH 4.4 00/43] 4.4.141-stable review Greg Kroah-Hartman
@ 2018-07-16 7:36 ` Greg Kroah-Hartman
2018-07-16 7:36 ` [PATCH 4.4 02/43] ibmasm: dont write out of bounds in read handler Greg Kroah-Hartman
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From: Greg Kroah-Hartman @ 2018-07-16 7:36 UTC (permalink / raw)
To: linux-kernel
Cc: Greg Kroah-Hartman, stable, Paul Burton, Serge Semin,
James Hogan, Ralf Baechle, linux-mips
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Paul Burton <paul.burton@mips.com>
commit 523402fa9101090c91d2033b7ebdfdcf65880488 upstream.
We currently attempt to check whether a physical address range provided
to __ioremap() may be in use by the page allocator by examining the
value of PageReserved for each page in the region - lowmem pages not
marked reserved are presumed to be in use by the page allocator, and
requests to ioremap them fail.
The way we check this has been broken since commit 92923ca3aace ("mm:
meminit: only set page reserved in the memblock region"), because
memblock will typically not have any knowledge of non-RAM pages and
therefore those pages will not have the PageReserved flag set. Thus when
we attempt to ioremap a region outside of RAM we incorrectly fail
believing that the region is RAM that may be in use.
In most cases ioremap() on MIPS will take a fast-path to use the
unmapped kseg1 or xkphys virtual address spaces and never hit this path,
so the only way to hit it is for a MIPS32 system to attempt to ioremap()
an address range in lowmem with flags other than _CACHE_UNCACHED.
Perhaps the most straightforward way to do this is using
ioremap_uncached_accelerated(), which is how the problem was discovered.
Fix this by making use of walk_system_ram_range() to test the address
range provided to __ioremap() against only RAM pages, rather than all
lowmem pages. This means that if we have a lowmem I/O region, which is
very common for MIPS systems, we're free to ioremap() address ranges
within it. A nice bonus is that the test is no longer limited to lowmem.
The approach here matches the way x86 performed the same test after
commit c81c8a1eeede ("x86, ioremap: Speed up check for RAM pages") until
x86 moved towards a slightly more complicated check using walk_mem_res()
for unrelated reasons with commit 0e4c12b45aa8 ("x86/mm, resource: Use
PAGE_KERNEL protection for ioremap of memory pages").
Signed-off-by: Paul Burton <paul.burton@mips.com>
Reported-by: Serge Semin <fancer.lancer@gmail.com>
Tested-by: Serge Semin <fancer.lancer@gmail.com>
Fixes: 92923ca3aace ("mm: meminit: only set page reserved in the memblock region")
Cc: James Hogan <jhogan@kernel.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: stable@vger.kernel.org # v4.2+
Patchwork: https://patchwork.linux-mips.org/patch/19786/
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/mips/mm/ioremap.c | 37 +++++++++++++++++++++++++------------
1 file changed, 25 insertions(+), 12 deletions(-)
--- a/arch/mips/mm/ioremap.c
+++ b/arch/mips/mm/ioremap.c
@@ -9,6 +9,7 @@
#include <linux/module.h>
#include <asm/addrspace.h>
#include <asm/byteorder.h>
+#include <linux/ioport.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
@@ -97,6 +98,20 @@ static int remap_area_pages(unsigned lon
return error;
}
+static int __ioremap_check_ram(unsigned long start_pfn, unsigned long nr_pages,
+ void *arg)
+{
+ unsigned long i;
+
+ for (i = 0; i < nr_pages; i++) {
+ if (pfn_valid(start_pfn + i) &&
+ !PageReserved(pfn_to_page(start_pfn + i)))
+ return 1;
+ }
+
+ return 0;
+}
+
/*
* Generic mapping function (not visible outside):
*/
@@ -115,8 +130,8 @@ static int remap_area_pages(unsigned lon
void __iomem * __ioremap(phys_addr_t phys_addr, phys_addr_t size, unsigned long flags)
{
+ unsigned long offset, pfn, last_pfn;
struct vm_struct * area;
- unsigned long offset;
phys_addr_t last_addr;
void * addr;
@@ -136,18 +151,16 @@ void __iomem * __ioremap(phys_addr_t phy
return (void __iomem *) CKSEG1ADDR(phys_addr);
/*
- * Don't allow anybody to remap normal RAM that we're using..
+ * Don't allow anybody to remap RAM that may be allocated by the page
+ * allocator, since that could lead to races & data clobbering.
*/
- if (phys_addr < virt_to_phys(high_memory)) {
- char *t_addr, *t_end;
- struct page *page;
-
- t_addr = __va(phys_addr);
- t_end = t_addr + (size - 1);
-
- for(page = virt_to_page(t_addr); page <= virt_to_page(t_end); page++)
- if(!PageReserved(page))
- return NULL;
+ pfn = PFN_DOWN(phys_addr);
+ last_pfn = PFN_DOWN(last_addr);
+ if (walk_system_ram_range(pfn, last_pfn - pfn + 1, NULL,
+ __ioremap_check_ram) == 1) {
+ WARN_ONCE(1, "ioremap on RAM at %pa - %pa\n",
+ &phys_addr, &last_addr);
+ return NULL;
}
/*
^ permalink raw reply [flat|nested] 53+ messages in thread* [PATCH 4.4 02/43] ibmasm: dont write out of bounds in read handler
2018-07-16 7:36 [PATCH 4.4 00/43] 4.4.141-stable review Greg Kroah-Hartman
2018-07-16 7:36 ` [PATCH 4.4 01/43] MIPS: Fix ioremap() RAM check Greg Kroah-Hartman
@ 2018-07-16 7:36 ` Greg Kroah-Hartman
2018-07-16 7:36 ` [PATCH 4.4 03/43] vmw_balloon: fix inflation with batching Greg Kroah-Hartman
` (43 subsequent siblings)
45 siblings, 0 replies; 53+ messages in thread
From: Greg Kroah-Hartman @ 2018-07-16 7:36 UTC (permalink / raw)
To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Jann Horn
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jann Horn <jannh@google.com>
commit a0341fc1981a950c1e902ab901e98f60e0e243f3 upstream.
This read handler had a lot of custom logic and wrote outside the bounds of
the provided buffer. This could lead to kernel and userspace memory
corruption. Just use simple_read_from_buffer() with a stack buffer.
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Cc: stable@vger.kernel.org
Signed-off-by: Jann Horn <jannh@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/misc/ibmasm/ibmasmfs.c | 27 +++------------------------
1 file changed, 3 insertions(+), 24 deletions(-)
--- a/drivers/misc/ibmasm/ibmasmfs.c
+++ b/drivers/misc/ibmasm/ibmasmfs.c
@@ -507,35 +507,14 @@ static int remote_settings_file_close(st
static ssize_t remote_settings_file_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
{
void __iomem *address = (void __iomem *)file->private_data;
- unsigned char *page;
- int retval;
int len = 0;
unsigned int value;
-
- if (*offset < 0)
- return -EINVAL;
- if (count == 0 || count > 1024)
- return 0;
- if (*offset != 0)
- return 0;
-
- page = (unsigned char *)__get_free_page(GFP_KERNEL);
- if (!page)
- return -ENOMEM;
+ char lbuf[20];
value = readl(address);
- len = sprintf(page, "%d\n", value);
-
- if (copy_to_user(buf, page, len)) {
- retval = -EFAULT;
- goto exit;
- }
- *offset += len;
- retval = len;
+ len = snprintf(lbuf, sizeof(lbuf), "%d\n", value);
-exit:
- free_page((unsigned long)page);
- return retval;
+ return simple_read_from_buffer(buf, count, offset, lbuf, len);
}
static ssize_t remote_settings_file_write(struct file *file, const char __user *ubuff, size_t count, loff_t *offset)
^ permalink raw reply [flat|nested] 53+ messages in thread* [PATCH 4.4 03/43] vmw_balloon: fix inflation with batching
2018-07-16 7:36 [PATCH 4.4 00/43] 4.4.141-stable review Greg Kroah-Hartman
2018-07-16 7:36 ` [PATCH 4.4 01/43] MIPS: Fix ioremap() RAM check Greg Kroah-Hartman
2018-07-16 7:36 ` [PATCH 4.4 02/43] ibmasm: dont write out of bounds in read handler Greg Kroah-Hartman
@ 2018-07-16 7:36 ` Greg Kroah-Hartman
2018-07-16 7:36 ` [PATCH 4.4 04/43] ahci: Disable LPM on Lenovo 50 series laptops with a too old BIOS Greg Kroah-Hartman
` (42 subsequent siblings)
45 siblings, 0 replies; 53+ messages in thread
From: Greg Kroah-Hartman @ 2018-07-16 7:36 UTC (permalink / raw)
To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Xavier Deguillard, Nadav Amit
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Nadav Amit <namit@vmware.com>
commit 90d72ce079791399ac255c75728f3c9e747b093d upstream.
Embarrassingly, the recent fix introduced worse problem than it solved,
causing the balloon not to inflate. The VM informed the hypervisor that
the pages for lock/unlock are sitting in the wrong address, as it used
the page that is used the uninitialized page variable.
Fixes: b23220fe054e9 ("vmw_balloon: fixing double free when batching mode is off")
Cc: stable@vger.kernel.org
Reviewed-by: Xavier Deguillard <xdeguillard@vmware.com>
Signed-off-by: Nadav Amit <namit@vmware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/misc/vmw_balloon.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/misc/vmw_balloon.c
+++ b/drivers/misc/vmw_balloon.c
@@ -467,7 +467,7 @@ static int vmballoon_send_batched_lock(s
unsigned int num_pages, bool is_2m_pages, unsigned int *target)
{
unsigned long status;
- unsigned long pfn = page_to_pfn(b->page);
+ unsigned long pfn = PHYS_PFN(virt_to_phys(b->batch_page));
STATS_INC(b->stats.lock[is_2m_pages]);
@@ -515,7 +515,7 @@ static bool vmballoon_send_batched_unloc
unsigned int num_pages, bool is_2m_pages, unsigned int *target)
{
unsigned long status;
- unsigned long pfn = page_to_pfn(b->page);
+ unsigned long pfn = PHYS_PFN(virt_to_phys(b->batch_page));
STATS_INC(b->stats.unlock[is_2m_pages]);
^ permalink raw reply [flat|nested] 53+ messages in thread* [PATCH 4.4 04/43] ahci: Disable LPM on Lenovo 50 series laptops with a too old BIOS
2018-07-16 7:36 [PATCH 4.4 00/43] 4.4.141-stable review Greg Kroah-Hartman
` (2 preceding siblings ...)
2018-07-16 7:36 ` [PATCH 4.4 03/43] vmw_balloon: fix inflation with batching Greg Kroah-Hartman
@ 2018-07-16 7:36 ` Greg Kroah-Hartman
2018-07-16 7:36 ` [PATCH 4.4 05/43] USB: serial: ch341: fix type promotion bug in ch341_control_in() Greg Kroah-Hartman
` (41 subsequent siblings)
45 siblings, 0 replies; 53+ messages in thread
From: Greg Kroah-Hartman @ 2018-07-16 7:36 UTC (permalink / raw)
To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Hans de Goede, Tejun Heo
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Hans de Goede <hdegoede@redhat.com>
commit 240630e61870e62e39a97225048f9945848fa5f5 upstream.
There have been several reports of LPM related hard freezes about once
a day on multiple Lenovo 50 series models. Strange enough these reports
where not disk model specific as LPM issues usually are and some users
with the exact same disk + laptop where seeing them while other users
where not seeing these issues.
It turns out that enabling LPM triggers a firmware bug somewhere, which
has been fixed in later BIOS versions.
This commit adds a new ahci_broken_lpm() function and a new ATA_FLAG_NO_LPM
for dealing with this.
The ahci_broken_lpm() function contains DMI match info for the 4 models
which are known to be affected by this and the DMI BIOS date field for
known good BIOS versions. If the BIOS date is older then the one in the
table LPM will be disabled and a warning will be printed.
Note the BIOS dates are for known good versions, some older versions may
work too, but we don't know for sure, the table is using dates from BIOS
versions for which users have confirmed that upgrading to that version
makes the problem go away.
Unfortunately I've been unable to get hold of the reporter who reported
that BIOS version 2.35 fixed the problems on the W541 for him. I've been
able to verify the DMI_SYS_VENDOR and DMI_PRODUCT_VERSION from an older
dmidecode, but I don't know the exact BIOS date as reported in the DMI.
Lenovo keeps a changelog with dates in their release notes, but the
dates there are the release dates not the build dates which are in DMI.
So I've chosen to set the date to which we compare to one day past the
release date of the 2.34 BIOS. I plan to fix this with a follow up
commit once I've the necessary info.
Cc: stable@vger.kernel.org
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/ata/ahci.c | 59 ++++++++++++++++++++++++++++++++++++++++++++++
drivers/ata/libata-core.c | 3 ++
include/linux/libata.h | 1
3 files changed, 63 insertions(+)
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -1229,6 +1229,59 @@ static bool ahci_broken_suspend(struct p
return strcmp(buf, dmi->driver_data) < 0;
}
+static bool ahci_broken_lpm(struct pci_dev *pdev)
+{
+ static const struct dmi_system_id sysids[] = {
+ /* Various Lenovo 50 series have LPM issues with older BIOSen */
+ {
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+ DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X250"),
+ },
+ .driver_data = "20180406", /* 1.31 */
+ },
+ {
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+ DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad L450"),
+ },
+ .driver_data = "20180420", /* 1.28 */
+ },
+ {
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+ DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T450s"),
+ },
+ .driver_data = "20180315", /* 1.33 */
+ },
+ {
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+ DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad W541"),
+ },
+ /*
+ * Note date based on release notes, 2.35 has been
+ * reported to be good, but I've been unable to get
+ * a hold of the reporter to get the DMI BIOS date.
+ * TODO: fix this.
+ */
+ .driver_data = "20180310", /* 2.35 */
+ },
+ { } /* terminate list */
+ };
+ const struct dmi_system_id *dmi = dmi_first_match(sysids);
+ int year, month, date;
+ char buf[9];
+
+ if (!dmi)
+ return false;
+
+ dmi_get_date(DMI_BIOS_DATE, &year, &month, &date);
+ snprintf(buf, sizeof(buf), "%04d%02d%02d", year, month, date);
+
+ return strcmp(buf, dmi->driver_data) < 0;
+}
+
static bool ahci_broken_online(struct pci_dev *pdev)
{
#define ENCODE_BUSDEVFN(bus, slot, func) \
@@ -1588,6 +1641,12 @@ static int ahci_init_one(struct pci_dev
"quirky BIOS, skipping spindown on poweroff\n");
}
+ if (ahci_broken_lpm(pdev)) {
+ pi.flags |= ATA_FLAG_NO_LPM;
+ dev_warn(&pdev->dev,
+ "BIOS update required for Link Power Management support\n");
+ }
+
if (ahci_broken_suspend(pdev)) {
hpriv->flags |= AHCI_HFLAG_NO_SUSPEND;
dev_warn(&pdev->dev,
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -2209,6 +2209,9 @@ int ata_dev_configure(struct ata_device
(id[ATA_ID_SATA_CAPABILITY] & 0xe) == 0x2)
dev->horkage |= ATA_HORKAGE_NOLPM;
+ if (ap->flags & ATA_FLAG_NO_LPM)
+ dev->horkage |= ATA_HORKAGE_NOLPM;
+
if (dev->horkage & ATA_HORKAGE_NOLPM) {
ata_dev_warn(dev, "LPM support broken, forcing max_power\n");
dev->link->ap->target_lpm_policy = ATA_LPM_MAX_POWER;
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -210,6 +210,7 @@ enum {
ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
/* (doesn't imply presence) */
ATA_FLAG_SATA = (1 << 1),
+ ATA_FLAG_NO_LPM = (1 << 2), /* host not happy with LPM */
ATA_FLAG_NO_LOG_PAGE = (1 << 5), /* do not issue log page read */
ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
^ permalink raw reply [flat|nested] 53+ messages in thread* [PATCH 4.4 05/43] USB: serial: ch341: fix type promotion bug in ch341_control_in()
2018-07-16 7:36 [PATCH 4.4 00/43] 4.4.141-stable review Greg Kroah-Hartman
` (3 preceding siblings ...)
2018-07-16 7:36 ` [PATCH 4.4 04/43] ahci: Disable LPM on Lenovo 50 series laptops with a too old BIOS Greg Kroah-Hartman
@ 2018-07-16 7:36 ` Greg Kroah-Hartman
2018-07-16 7:36 ` [PATCH 4.4 06/43] USB: serial: cp210x: add another USB ID for Qivicon ZigBee stick Greg Kroah-Hartman
` (40 subsequent siblings)
45 siblings, 0 replies; 53+ messages in thread
From: Greg Kroah-Hartman @ 2018-07-16 7:36 UTC (permalink / raw)
To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Dan Carpenter, Johan Hovold
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Dan Carpenter <dan.carpenter@oracle.com>
commit e33eab9ded328ccc14308afa51b5be7cbe78d30b upstream.
The "r" variable is an int and "bufsize" is an unsigned int so the
comparison is type promoted to unsigned. If usb_control_msg() returns a
negative that is treated as a high positive value and the error handling
doesn't work.
Fixes: 2d5a9c72d0c4 ("USB: serial: ch341: fix control-message error handling")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/usb/serial/ch341.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/usb/serial/ch341.c
+++ b/drivers/usb/serial/ch341.c
@@ -118,7 +118,7 @@ static int ch341_control_in(struct usb_d
r = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), request,
USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
value, index, buf, bufsize, DEFAULT_TIMEOUT);
- if (r < bufsize) {
+ if (r < (int)bufsize) {
if (r >= 0) {
dev_err(&dev->dev,
"short control message received (%d < %u)\n",
^ permalink raw reply [flat|nested] 53+ messages in thread* [PATCH 4.4 06/43] USB: serial: cp210x: add another USB ID for Qivicon ZigBee stick
2018-07-16 7:36 [PATCH 4.4 00/43] 4.4.141-stable review Greg Kroah-Hartman
` (4 preceding siblings ...)
2018-07-16 7:36 ` [PATCH 4.4 05/43] USB: serial: ch341: fix type promotion bug in ch341_control_in() Greg Kroah-Hartman
@ 2018-07-16 7:36 ` Greg Kroah-Hartman
2018-07-16 7:36 ` [PATCH 4.4 07/43] USB: serial: keyspan_pda: fix modem-status error handling Greg Kroah-Hartman
` (39 subsequent siblings)
45 siblings, 0 replies; 53+ messages in thread
From: Greg Kroah-Hartman @ 2018-07-16 7:36 UTC (permalink / raw)
To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Olli Salonen, Johan Hovold
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Olli Salonen <olli.salonen@iki.fi>
commit 367b160fe4717c14a2a978b6f9ffb75a7762d3ed upstream.
There are two versions of the Qivicon Zigbee stick in circulation. This
adds the second USB ID to the cp210x driver.
Signed-off-by: Olli Salonen <olli.salonen@iki.fi>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/usb/serial/cp210x.c | 1 +
1 file changed, 1 insertion(+)
--- a/drivers/usb/serial/cp210x.c
+++ b/drivers/usb/serial/cp210x.c
@@ -145,6 +145,7 @@ static const struct usb_device_id id_tab
{ USB_DEVICE(0x10C4, 0x8977) }, /* CEL MeshWorks DevKit Device */
{ USB_DEVICE(0x10C4, 0x8998) }, /* KCF Technologies PRN */
{ USB_DEVICE(0x10C4, 0x89A4) }, /* CESINEL FTBC Flexible Thyristor Bridge Controller */
+ { USB_DEVICE(0x10C4, 0x89FB) }, /* Qivicon ZigBee USB Radio Stick */
{ USB_DEVICE(0x10C4, 0x8A2A) }, /* HubZ dual ZigBee and Z-Wave dongle */
{ USB_DEVICE(0x10C4, 0x8A5E) }, /* CEL EM3588 ZigBee USB Stick Long Range */
{ USB_DEVICE(0x10C4, 0x8B34) }, /* Qivicon ZigBee USB Radio Stick */
^ permalink raw reply [flat|nested] 53+ messages in thread* [PATCH 4.4 07/43] USB: serial: keyspan_pda: fix modem-status error handling
2018-07-16 7:36 [PATCH 4.4 00/43] 4.4.141-stable review Greg Kroah-Hartman
` (5 preceding siblings ...)
2018-07-16 7:36 ` [PATCH 4.4 06/43] USB: serial: cp210x: add another USB ID for Qivicon ZigBee stick Greg Kroah-Hartman
@ 2018-07-16 7:36 ` Greg Kroah-Hartman
2018-07-16 7:36 ` [PATCH 4.4 08/43] USB: yurex: fix out-of-bounds uaccess in read handler Greg Kroah-Hartman
` (38 subsequent siblings)
45 siblings, 0 replies; 53+ messages in thread
From: Greg Kroah-Hartman @ 2018-07-16 7:36 UTC (permalink / raw)
To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Johan Hovold
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Johan Hovold <johan@kernel.org>
commit 01b3cdfca263a17554f7b249d20a247b2a751521 upstream.
Fix broken modem-status error handling which could lead to bits of slab
data leaking to user space.
Fixes: 3b36a8fd6777 ("usb: fix uninitialized variable warning in keyspan_pda")
Cc: stable <stable@vger.kernel.org> # 2.6.27
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/usb/serial/keyspan_pda.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/usb/serial/keyspan_pda.c
+++ b/drivers/usb/serial/keyspan_pda.c
@@ -373,8 +373,10 @@ static int keyspan_pda_get_modem_info(st
3, /* get pins */
USB_TYPE_VENDOR|USB_RECIP_INTERFACE|USB_DIR_IN,
0, 0, data, 1, 2000);
- if (rc >= 0)
+ if (rc == 1)
*value = *data;
+ else if (rc >= 0)
+ rc = -EIO;
kfree(data);
return rc;
^ permalink raw reply [flat|nested] 53+ messages in thread* [PATCH 4.4 08/43] USB: yurex: fix out-of-bounds uaccess in read handler
2018-07-16 7:36 [PATCH 4.4 00/43] 4.4.141-stable review Greg Kroah-Hartman
` (6 preceding siblings ...)
2018-07-16 7:36 ` [PATCH 4.4 07/43] USB: serial: keyspan_pda: fix modem-status error handling Greg Kroah-Hartman
@ 2018-07-16 7:36 ` Greg Kroah-Hartman
2018-07-16 7:36 ` [PATCH 4.4 09/43] USB: serial: mos7840: fix status-register error handling Greg Kroah-Hartman
` (37 subsequent siblings)
45 siblings, 0 replies; 53+ messages in thread
From: Greg Kroah-Hartman @ 2018-07-16 7:36 UTC (permalink / raw)
To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Jann Horn
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jann Horn <jannh@google.com>
commit f1e255d60ae66a9f672ff9a207ee6cd8e33d2679 upstream.
In general, accessing userspace memory beyond the length of the supplied
buffer in VFS read/write handlers can lead to both kernel memory corruption
(via kernel_read()/kernel_write(), which can e.g. be triggered via
sys_splice()) and privilege escalation inside userspace.
Fix it by using simple_read_from_buffer() instead of custom logic.
Fixes: 6bc235a2e24a ("USB: add driver for Meywa-Denki & Kayac YUREX")
Signed-off-by: Jann Horn <jannh@google.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/usb/misc/yurex.c | 23 ++++++-----------------
1 file changed, 6 insertions(+), 17 deletions(-)
--- a/drivers/usb/misc/yurex.c
+++ b/drivers/usb/misc/yurex.c
@@ -414,8 +414,7 @@ static ssize_t yurex_read(struct file *f
loff_t *ppos)
{
struct usb_yurex *dev;
- int retval = 0;
- int bytes_read = 0;
+ int len = 0;
char in_buffer[20];
unsigned long flags;
@@ -423,26 +422,16 @@ static ssize_t yurex_read(struct file *f
mutex_lock(&dev->io_mutex);
if (!dev->interface) { /* already disconnected */
- retval = -ENODEV;
- goto exit;
+ mutex_unlock(&dev->io_mutex);
+ return -ENODEV;
}
spin_lock_irqsave(&dev->lock, flags);
- bytes_read = snprintf(in_buffer, 20, "%lld\n", dev->bbu);
+ len = snprintf(in_buffer, 20, "%lld\n", dev->bbu);
spin_unlock_irqrestore(&dev->lock, flags);
-
- if (*ppos < bytes_read) {
- if (copy_to_user(buffer, in_buffer + *ppos, bytes_read - *ppos))
- retval = -EFAULT;
- else {
- retval = bytes_read - *ppos;
- *ppos += bytes_read;
- }
- }
-
-exit:
mutex_unlock(&dev->io_mutex);
- return retval;
+
+ return simple_read_from_buffer(buffer, count, ppos, in_buffer, len);
}
static ssize_t yurex_write(struct file *file, const char __user *user_buffer,
^ permalink raw reply [flat|nested] 53+ messages in thread* [PATCH 4.4 09/43] USB: serial: mos7840: fix status-register error handling
2018-07-16 7:36 [PATCH 4.4 00/43] 4.4.141-stable review Greg Kroah-Hartman
` (7 preceding siblings ...)
2018-07-16 7:36 ` [PATCH 4.4 08/43] USB: yurex: fix out-of-bounds uaccess in read handler Greg Kroah-Hartman
@ 2018-07-16 7:36 ` Greg Kroah-Hartman
2018-07-16 7:36 ` [PATCH 4.4 10/43] usb: quirks: add delay quirks for Corsair Strafe Greg Kroah-Hartman
` (36 subsequent siblings)
45 siblings, 0 replies; 53+ messages in thread
From: Greg Kroah-Hartman @ 2018-07-16 7:36 UTC (permalink / raw)
To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Johan Hovold
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Johan Hovold <johan@kernel.org>
commit 794744abfffef8b1f3c0c8a4896177d6d13d653d upstream.
Add missing transfer-length sanity check to the status-register
completion handler to avoid leaking bits of uninitialised slab data to
user space.
Fixes: 3f5429746d91 ("USB: Moschip 7840 USB-Serial Driver")
Cc: stable <stable@vger.kernel.org> # 2.6.19
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/usb/serial/mos7840.c | 3 +++
1 file changed, 3 insertions(+)
--- a/drivers/usb/serial/mos7840.c
+++ b/drivers/usb/serial/mos7840.c
@@ -482,6 +482,9 @@ static void mos7840_control_callback(str
}
dev_dbg(dev, "%s urb buffer size is %d\n", __func__, urb->actual_length);
+ if (urb->actual_length < 1)
+ goto out;
+
dev_dbg(dev, "%s mos7840_port->MsrLsr is %d port %d\n", __func__,
mos7840_port->MsrLsr, mos7840_port->port_num);
data = urb->transfer_buffer;
^ permalink raw reply [flat|nested] 53+ messages in thread* [PATCH 4.4 10/43] usb: quirks: add delay quirks for Corsair Strafe
2018-07-16 7:36 [PATCH 4.4 00/43] 4.4.141-stable review Greg Kroah-Hartman
` (8 preceding siblings ...)
2018-07-16 7:36 ` [PATCH 4.4 09/43] USB: serial: mos7840: fix status-register error handling Greg Kroah-Hartman
@ 2018-07-16 7:36 ` Greg Kroah-Hartman
2018-07-16 7:36 ` [PATCH 4.4 11/43] xhci: xhci-mem: off by one in xhci_stream_id_to_ring() Greg Kroah-Hartman
` (35 subsequent siblings)
45 siblings, 0 replies; 53+ messages in thread
From: Greg Kroah-Hartman @ 2018-07-16 7:36 UTC (permalink / raw)
To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Nico Sneck
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Nico Sneck <snecknico@gmail.com>
commit bba57eddadda936c94b5dccf73787cb9e159d0a5 upstream.
Corsair Strafe appears to suffer from the same issues
as the Corsair Strafe RGB.
Apply the same quirks (control message delay and init delay)
that the RGB version has to 1b1c:1b15.
With these quirks in place the keyboard works correctly upon
booting the system, and no longer requires reattaching the device.
Signed-off-by: Nico Sneck <snecknico@gmail.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/usb/core/quirks.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/drivers/usb/core/quirks.c
+++ b/drivers/usb/core/quirks.c
@@ -231,6 +231,10 @@ static const struct usb_device_id usb_qu
/* Corsair K70 RGB */
{ USB_DEVICE(0x1b1c, 0x1b13), .driver_info = USB_QUIRK_DELAY_INIT },
+ /* Corsair Strafe */
+ { USB_DEVICE(0x1b1c, 0x1b15), .driver_info = USB_QUIRK_DELAY_INIT |
+ USB_QUIRK_DELAY_CTRL_MSG },
+
/* Corsair Strafe RGB */
{ USB_DEVICE(0x1b1c, 0x1b20), .driver_info = USB_QUIRK_DELAY_INIT |
USB_QUIRK_DELAY_CTRL_MSG },
^ permalink raw reply [flat|nested] 53+ messages in thread* [PATCH 4.4 11/43] xhci: xhci-mem: off by one in xhci_stream_id_to_ring()
2018-07-16 7:36 [PATCH 4.4 00/43] 4.4.141-stable review Greg Kroah-Hartman
` (9 preceding siblings ...)
2018-07-16 7:36 ` [PATCH 4.4 10/43] usb: quirks: add delay quirks for Corsair Strafe Greg Kroah-Hartman
@ 2018-07-16 7:36 ` Greg Kroah-Hartman
2018-07-16 7:36 ` [PATCH 4.4 12/43] HID: usbhid: add quirk for innomedia INNEX GENESIS/ATARI adapter Greg Kroah-Hartman
` (34 subsequent siblings)
45 siblings, 0 replies; 53+ messages in thread
From: Greg Kroah-Hartman @ 2018-07-16 7:36 UTC (permalink / raw)
To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Dan Carpenter
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Dan Carpenter <dan.carpenter@oracle.com>
commit 313db3d6488bb03b61b99de9dbca061f1fd838e1 upstream.
The > should be >= here so that we don't read one element beyond the end
of the ep->stream_info->stream_rings[] array.
Fixes: e9df17eb1408 ("USB: xhci: Correct assumptions about number of rings per endpoint.")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/usb/host/xhci-mem.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/usb/host/xhci-mem.c
+++ b/drivers/usb/host/xhci-mem.c
@@ -638,7 +638,7 @@ struct xhci_ring *xhci_stream_id_to_ring
if (!ep->stream_info)
return NULL;
- if (stream_id > ep->stream_info->num_streams)
+ if (stream_id >= ep->stream_info->num_streams)
return NULL;
return ep->stream_info->stream_rings[stream_id];
}
^ permalink raw reply [flat|nested] 53+ messages in thread* [PATCH 4.4 12/43] HID: usbhid: add quirk for innomedia INNEX GENESIS/ATARI adapter
2018-07-16 7:36 [PATCH 4.4 00/43] 4.4.141-stable review Greg Kroah-Hartman
` (10 preceding siblings ...)
2018-07-16 7:36 ` [PATCH 4.4 11/43] xhci: xhci-mem: off by one in xhci_stream_id_to_ring() Greg Kroah-Hartman
@ 2018-07-16 7:36 ` Greg Kroah-Hartman
2018-07-16 7:36 ` [PATCH 4.4 13/43] Fix up non-directory creation in SGID directories Greg Kroah-Hartman
` (33 subsequent siblings)
45 siblings, 0 replies; 53+ messages in thread
From: Greg Kroah-Hartman @ 2018-07-16 7:36 UTC (permalink / raw)
To: linux-kernel
Cc: Greg Kroah-Hartman, stable, Tomasz Kramkowski,
Benjamin Tissoires, Jiri Kosina
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Tomasz Kramkowski <tk@the-tk.com>
commit 9547837bdccb4af127528b36a73377150658b4ac upstream.
The (1292:4745) Innomedia INNEX GENESIS/ATARI adapter needs
HID_QUIRK_MULTI_INPUT to split the device up into two controllers
instead of inputs from both being merged into one.
Signed-off-by: Tomasz Kramkowski <tk@the-tk.com>
Acked-By: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/hid/hid-ids.h | 3 +++
drivers/hid/usbhid/hid-quirks.c | 1 +
2 files changed, 4 insertions(+)
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -512,6 +512,9 @@
#define USB_VENDOR_ID_IRTOUCHSYSTEMS 0x6615
#define USB_DEVICE_ID_IRTOUCH_INFRARED_USB 0x0070
+#define USB_VENDOR_ID_INNOMEDIA 0x1292
+#define USB_DEVICE_ID_INNEX_GENESIS_ATARI 0x4745
+
#define USB_VENDOR_ID_ITE 0x048d
#define USB_DEVICE_ID_ITE_LENOVO_YOGA 0x8386
#define USB_DEVICE_ID_ITE_LENOVO_YOGA2 0x8350
--- a/drivers/hid/usbhid/hid-quirks.c
+++ b/drivers/hid/usbhid/hid-quirks.c
@@ -152,6 +152,7 @@ static const struct hid_blacklist {
{ USB_VENDOR_ID_MULTIPLE_1781, USB_DEVICE_ID_RAPHNET_4NES4SNES_OLD, HID_QUIRK_MULTI_INPUT },
{ USB_VENDOR_ID_DRACAL_RAPHNET, USB_DEVICE_ID_RAPHNET_2NES2SNES, HID_QUIRK_MULTI_INPUT },
{ USB_VENDOR_ID_DRACAL_RAPHNET, USB_DEVICE_ID_RAPHNET_4NES4SNES, HID_QUIRK_MULTI_INPUT },
+ { USB_VENDOR_ID_INNOMEDIA, USB_DEVICE_ID_INNEX_GENESIS_ATARI, HID_QUIRK_MULTI_INPUT },
{ 0, 0 }
};
^ permalink raw reply [flat|nested] 53+ messages in thread* [PATCH 4.4 13/43] Fix up non-directory creation in SGID directories
2018-07-16 7:36 [PATCH 4.4 00/43] 4.4.141-stable review Greg Kroah-Hartman
` (11 preceding siblings ...)
2018-07-16 7:36 ` [PATCH 4.4 12/43] HID: usbhid: add quirk for innomedia INNEX GENESIS/ATARI adapter Greg Kroah-Hartman
@ 2018-07-16 7:36 ` Greg Kroah-Hartman
2018-07-16 7:36 ` [PATCH 4.4 14/43] tools build: fix # escaping in .cmd files for future Make Greg Kroah-Hartman
` (32 subsequent siblings)
45 siblings, 0 replies; 53+ messages in thread
From: Greg Kroah-Hartman @ 2018-07-16 7:36 UTC (permalink / raw)
To: linux-kernel
Cc: Greg Kroah-Hartman, stable, Jann Horn, Andy Lutomirski, Al Viro,
Linus Torvalds
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Linus Torvalds <torvalds@linux-foundation.org>
commit 0fa3ecd87848c9c93c2c828ef4c3a8ca36ce46c7 upstream.
sgid directories have special semantics, making newly created files in
the directory belong to the group of the directory, and newly created
subdirectories will also become sgid. This is historically used for
group-shared directories.
But group directories writable by non-group members should not imply
that such non-group members can magically join the group, so make sure
to clear the sgid bit on non-directories for non-members (but remember
that sgid without group execute means "mandatory locking", just to
confuse things even more).
Reported-by: Jann Horn <jannh@google.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
fs/inode.c | 6 ++++++
1 file changed, 6 insertions(+)
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -1937,8 +1937,14 @@ void inode_init_owner(struct inode *inod
inode->i_uid = current_fsuid();
if (dir && dir->i_mode & S_ISGID) {
inode->i_gid = dir->i_gid;
+
+ /* Directories are special, and always inherit S_ISGID */
if (S_ISDIR(mode))
mode |= S_ISGID;
+ else if ((mode & (S_ISGID | S_IXGRP)) == (S_ISGID | S_IXGRP) &&
+ !in_group_p(inode->i_gid) &&
+ !capable_wrt_inode_uidgid(dir, CAP_FSETID))
+ mode &= ~S_ISGID;
} else
inode->i_gid = current_fsgid();
inode->i_mode = mode;
^ permalink raw reply [flat|nested] 53+ messages in thread* [PATCH 4.4 14/43] tools build: fix # escaping in .cmd files for future Make
2018-07-16 7:36 [PATCH 4.4 00/43] 4.4.141-stable review Greg Kroah-Hartman
` (12 preceding siblings ...)
2018-07-16 7:36 ` [PATCH 4.4 13/43] Fix up non-directory creation in SGID directories Greg Kroah-Hartman
@ 2018-07-16 7:36 ` Greg Kroah-Hartman
2018-07-17 12:57 ` Konstantin Khlebnikov
2018-07-16 7:36 ` [PATCH 4.4 15/43] iw_cxgb4: correctly enforce the max reg_mr depth Greg Kroah-Hartman
` (31 subsequent siblings)
45 siblings, 1 reply; 53+ messages in thread
From: Greg Kroah-Hartman @ 2018-07-16 7:36 UTC (permalink / raw)
To: linux-kernel
Cc: Greg Kroah-Hartman, stable, Randy Dunlap, Rasmus Villemoes,
Paul Menzel, Masahiro Yamada
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Paul Menzel <pmenzel@molgen.mpg.de>
commit 9feeb638cde083c737e295c0547f1b4f28e99583 upstream.
In 2016 GNU Make made a backwards incompatible change to the way '#'
characters were handled in Makefiles when used inside functions or
macros:
http://git.savannah.gnu.org/cgit/make.git/commit/?id=c6966b323811c37acedff05b57
Due to this change, when attempting to run `make prepare' I get a
spurious make syntax error:
/home/earnest/linux/tools/objtool/.fixdep.o.cmd:1: *** missing separator. Stop.
When inspecting `.fixdep.o.cmd' it includes two lines which use
unescaped comment characters at the top:
\# cannot find fixdep (/home/earnest/linux/tools/objtool//fixdep)
\# using basic dep data
This is because `tools/build/Build.include' prints these '\#'
characters:
printf '\# cannot find fixdep (%s)\n' $(fixdep) > $(dot-target).cmd; \
printf '\# using basic dep data\n\n' >> $(dot-target).cmd; \
This completes commit 9564a8cf422d ("Kbuild: fix # escaping in .cmd files
for future Make").
Link: https://bugzilla.kernel.org/show_bug.cgi?id=197847
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: stable@vger.kernel.org
Signed-off-by: Paul Menzel <pmenzel@molgen.mpg.de>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
tools/build/Build.include | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/tools/build/Build.include
+++ b/tools/build/Build.include
@@ -62,8 +62,8 @@ dep-cmd = $(if $(wildcard $(fixdep)),
$(fixdep) $(depfile) $@ '$(make-cmd)' > $(dot-target).tmp; \
rm -f $(depfile); \
mv -f $(dot-target).tmp $(dot-target).cmd, \
- printf '\# cannot find fixdep (%s)\n' $(fixdep) > $(dot-target).cmd; \
- printf '\# using basic dep data\n\n' >> $(dot-target).cmd; \
+ printf '$(pound) cannot find fixdep (%s)\n' $(fixdep) > $(dot-target).cmd; \
+ printf '$(pound) using basic dep data\n\n' >> $(dot-target).cmd; \
cat $(depfile) >> $(dot-target).cmd; \
printf '%s\n' 'cmd_$@ := $(make-cmd)' >> $(dot-target).cmd)
^ permalink raw reply [flat|nested] 53+ messages in thread* Re: [PATCH 4.4 14/43] tools build: fix # escaping in .cmd files for future Make
2018-07-16 7:36 ` [PATCH 4.4 14/43] tools build: fix # escaping in .cmd files for future Make Greg Kroah-Hartman
@ 2018-07-17 12:57 ` Konstantin Khlebnikov
2018-07-17 13:10 ` Greg Kroah-Hartman
2018-07-17 13:15 ` Greg Kroah-Hartman
0 siblings, 2 replies; 53+ messages in thread
From: Konstantin Khlebnikov @ 2018-07-17 12:57 UTC (permalink / raw)
To: Greg Kroah-Hartman, linux-kernel
Cc: stable, Randy Dunlap, Rasmus Villemoes, Paul Menzel, Masahiro Yamada
This commit depends on commit 9564a8cf422d7b58f6e857e3546d346fa970191e
"Kbuild: fix # escaping in .cmd files for future Make"
which is missing in 4.4.141
this breaks compilation of tools/perf for me
make -C tools/perf V=1 JOBS=24 WERROR=0 NO_GTK2=1 LDFLAGS=-static all
make[1]: Entering directory `/tmp/buildd/linux-yandex-4.4.141/tools/perf'
BUILD: Doing 'make -j24' parallel build
Auto-detecting system features:
... dwarf: [ on ]
... dwarf_getlocations: [ OFF ]
... glibc: [ on ]
... gtk2: [ OFF ]
... libaudit: [ on ]
... libbfd: [ on ]
... libelf: [ on ]
... libnuma: [ on ]
... numa_num_possible_cpus: [ on ]
... libperl: [ OFF ]
... libpython: [ OFF ]
... libslang: [ on ]
... libunwind: [ on ]
... libdw-dwarf-unwind: [ OFF ]
... zlib: [ on ]
... lzma: [ on ]
... get_cpuid: [ on ]
... bpf: [ on ]
config/Makefile:274: No libdw DWARF unwind found, Please install elfutils-devel/libdw-dev >= 0.158 and/or set LIBDW_DIR
config/Makefile:282: Old libdw.h, finding variables at given 'perf probe' point will not work, install elfutils-devel/libdw-dev >= 0.157
config/Makefile:458: Missing perl devel files. Disabling perl scripting support, please install perl-ExtUtils-Embed/libperl-dev
config/Makefile:501: No 'Python.h' (for Python 2.x support) was found: disables Python support - please install python-devel/python-dev
$(:)
make -C /tmp/buildd/linux-yandex-4.4.141/tools/build fixdep
/bin/sh util/PERF-VERSION-GEN
make -f /tmp/buildd/linux-yandex-4.4.141/tools/build/Makefile.build dir=. obj=fixdep
. util/generate-cmdlist.sh > common-cmds.h+ && mv common-cmds.h+ common-cmds.h
.fixdep.o.cmd:1: *** missing separator. Stop.
make[3]: *** [fixdep-in.o] Error 2
make[2]: *** [fixdep] Error 2
On 16.07.2018 10:36, Greg Kroah-Hartman wrote:
> 4.4-stable review patch. If anyone has any objections, please let me know.
>
> ------------------
>
> From: Paul Menzel <pmenzel@molgen.mpg.de>
>
> commit 9feeb638cde083c737e295c0547f1b4f28e99583 upstream.
>
> In 2016 GNU Make made a backwards incompatible change to the way '#'
> characters were handled in Makefiles when used inside functions or
> macros:
>
> http://git.savannah.gnu.org/cgit/make.git/commit/?id=c6966b323811c37acedff05b57
>
> Due to this change, when attempting to run `make prepare' I get a
> spurious make syntax error:
>
> /home/earnest/linux/tools/objtool/.fixdep.o.cmd:1: *** missing separator. Stop.
>
> When inspecting `.fixdep.o.cmd' it includes two lines which use
> unescaped comment characters at the top:
>
> \# cannot find fixdep (/home/earnest/linux/tools/objtool//fixdep)
> \# using basic dep data
>
> This is because `tools/build/Build.include' prints these '\#'
> characters:
>
> printf '\# cannot find fixdep (%s)\n' $(fixdep) > $(dot-target).cmd; \
> printf '\# using basic dep data\n\n' >> $(dot-target).cmd; \
>
> This completes commit 9564a8cf422d ("Kbuild: fix # escaping in .cmd files
> for future Make").
>
> Link: https://bugzilla.kernel.org/show_bug.cgi?id=197847
> Cc: Randy Dunlap <rdunlap@infradead.org>
> Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
> Cc: stable@vger.kernel.org
> Signed-off-by: Paul Menzel <pmenzel@molgen.mpg.de>
> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
>
> ---
> tools/build/Build.include | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> --- a/tools/build/Build.include
> +++ b/tools/build/Build.include
> @@ -62,8 +62,8 @@ dep-cmd = $(if $(wildcard $(fixdep)),
> $(fixdep) $(depfile) $@ '$(make-cmd)' > $(dot-target).tmp; \
> rm -f $(depfile); \
> mv -f $(dot-target).tmp $(dot-target).cmd, \
> - printf '\# cannot find fixdep (%s)\n' $(fixdep) > $(dot-target).cmd; \
> - printf '\# using basic dep data\n\n' >> $(dot-target).cmd; \
> + printf '$(pound) cannot find fixdep (%s)\n' $(fixdep) > $(dot-target).cmd; \
> + printf '$(pound) using basic dep data\n\n' >> $(dot-target).cmd; \
> cat $(depfile) >> $(dot-target).cmd; \
> printf '%s\n' 'cmd_$@ := $(make-cmd)' >> $(dot-target).cmd)
>
>
>
>
^ permalink raw reply [flat|nested] 53+ messages in thread* Re: [PATCH 4.4 14/43] tools build: fix # escaping in .cmd files for future Make
2018-07-17 12:57 ` Konstantin Khlebnikov
@ 2018-07-17 13:10 ` Greg Kroah-Hartman
2018-07-17 13:15 ` Greg Kroah-Hartman
1 sibling, 0 replies; 53+ messages in thread
From: Greg Kroah-Hartman @ 2018-07-17 13:10 UTC (permalink / raw)
To: Konstantin Khlebnikov
Cc: linux-kernel, stable, Randy Dunlap, Rasmus Villemoes,
Paul Menzel, Masahiro Yamada
On Tue, Jul 17, 2018 at 03:57:21PM +0300, Konstantin Khlebnikov wrote:
> This commit depends on commit 9564a8cf422d7b58f6e857e3546d346fa970191e
> "Kbuild: fix # escaping in .cmd files for future Make"
> which is missing in 4.4.141
>
>
> this breaks compilation of tools/perf for me
>
> make -C tools/perf V=1 JOBS=24 WERROR=0 NO_GTK2=1 LDFLAGS=-static all
> make[1]: Entering directory `/tmp/buildd/linux-yandex-4.4.141/tools/perf'
> BUILD: Doing 'make -j24' parallel build
>
> Auto-detecting system features:
> ... dwarf: [ on ]
> ... dwarf_getlocations: [ OFF ]
> ... glibc: [ on ]
> ... gtk2: [ OFF ]
> ... libaudit: [ on ]
> ... libbfd: [ on ]
> ... libelf: [ on ]
> ... libnuma: [ on ]
> ... numa_num_possible_cpus: [ on ]
> ... libperl: [ OFF ]
> ... libpython: [ OFF ]
> ... libslang: [ on ]
> ... libunwind: [ on ]
> ... libdw-dwarf-unwind: [ OFF ]
> ... zlib: [ on ]
> ... lzma: [ on ]
> ... get_cpuid: [ on ]
> ... bpf: [ on ]
>
> config/Makefile:274: No libdw DWARF unwind found, Please install elfutils-devel/libdw-dev >= 0.158 and/or set LIBDW_DIR
> config/Makefile:282: Old libdw.h, finding variables at given 'perf probe' point will not work, install elfutils-devel/libdw-dev >= 0.157
> config/Makefile:458: Missing perl devel files. Disabling perl scripting support, please install perl-ExtUtils-Embed/libperl-dev
> config/Makefile:501: No 'Python.h' (for Python 2.x support) was found: disables Python support - please install python-devel/python-dev
> $(:)
> make -C /tmp/buildd/linux-yandex-4.4.141/tools/build fixdep
> /bin/sh util/PERF-VERSION-GEN
> make -f /tmp/buildd/linux-yandex-4.4.141/tools/build/Makefile.build dir=. obj=fixdep
> . util/generate-cmdlist.sh > common-cmds.h+ && mv common-cmds.h+ common-cmds.h
> .fixdep.o.cmd:1: *** missing separator. Stop.
> make[3]: *** [fixdep-in.o] Error 2
> make[2]: *** [fixdep] Error 2
Ick.
Ok, let me go backport the original patch to 4.4.y now to try to fix
this up, sorry about that.
greg k-h
^ permalink raw reply [flat|nested] 53+ messages in thread
* Re: [PATCH 4.4 14/43] tools build: fix # escaping in .cmd files for future Make
2018-07-17 12:57 ` Konstantin Khlebnikov
2018-07-17 13:10 ` Greg Kroah-Hartman
@ 2018-07-17 13:15 ` Greg Kroah-Hartman
2018-07-17 19:51 ` Konstantin Khlebnikov
1 sibling, 1 reply; 53+ messages in thread
From: Greg Kroah-Hartman @ 2018-07-17 13:15 UTC (permalink / raw)
To: Konstantin Khlebnikov
Cc: linux-kernel, stable, Randy Dunlap, Rasmus Villemoes,
Paul Menzel, Masahiro Yamada
On Tue, Jul 17, 2018 at 03:57:21PM +0300, Konstantin Khlebnikov wrote:
> This commit depends on commit 9564a8cf422d7b58f6e857e3546d346fa970191e
> "Kbuild: fix # escaping in .cmd files for future Make"
> which is missing in 4.4.141
>
>
> this breaks compilation of tools/perf for me
>
> make -C tools/perf V=1 JOBS=24 WERROR=0 NO_GTK2=1 LDFLAGS=-static all
> make[1]: Entering directory `/tmp/buildd/linux-yandex-4.4.141/tools/perf'
> BUILD: Doing 'make -j24' parallel build
>
> Auto-detecting system features:
> ... dwarf: [ on ]
> ... dwarf_getlocations: [ OFF ]
> ... glibc: [ on ]
> ... gtk2: [ OFF ]
> ... libaudit: [ on ]
> ... libbfd: [ on ]
> ... libelf: [ on ]
> ... libnuma: [ on ]
> ... numa_num_possible_cpus: [ on ]
> ... libperl: [ OFF ]
> ... libpython: [ OFF ]
> ... libslang: [ on ]
> ... libunwind: [ on ]
> ... libdw-dwarf-unwind: [ OFF ]
> ... zlib: [ on ]
> ... lzma: [ on ]
> ... get_cpuid: [ on ]
> ... bpf: [ on ]
>
> config/Makefile:274: No libdw DWARF unwind found, Please install elfutils-devel/libdw-dev >= 0.158 and/or set LIBDW_DIR
> config/Makefile:282: Old libdw.h, finding variables at given 'perf probe' point will not work, install elfutils-devel/libdw-dev >= 0.157
> config/Makefile:458: Missing perl devel files. Disabling perl scripting support, please install perl-ExtUtils-Embed/libperl-dev
> config/Makefile:501: No 'Python.h' (for Python 2.x support) was found: disables Python support - please install python-devel/python-dev
> $(:)
> make -C /tmp/buildd/linux-yandex-4.4.141/tools/build fixdep
> /bin/sh util/PERF-VERSION-GEN
> make -f /tmp/buildd/linux-yandex-4.4.141/tools/build/Makefile.build dir=. obj=fixdep
> . util/generate-cmdlist.sh > common-cmds.h+ && mv common-cmds.h+ common-cmds.h
> .fixdep.o.cmd:1: *** missing separator. Stop.
> make[3]: *** [fixdep-in.o] Error 2
> make[2]: *** [fixdep] Error 2
Ok, backporting the Makefile fixes resolves this issue. But perf still
fails to build for me due to some futex errors, which is odd, do you see
that too?
thanks,
greg k-h
^ permalink raw reply [flat|nested] 53+ messages in thread
* Re: [PATCH 4.4 14/43] tools build: fix # escaping in .cmd files for future Make
2018-07-17 13:15 ` Greg Kroah-Hartman
@ 2018-07-17 19:51 ` Konstantin Khlebnikov
2018-07-18 8:24 ` Greg Kroah-Hartman
0 siblings, 1 reply; 53+ messages in thread
From: Konstantin Khlebnikov @ 2018-07-17 19:51 UTC (permalink / raw)
To: Greg Kroah-Hartman
Cc: linux-kernel, stable, Randy Dunlap, Rasmus Villemoes,
Paul Menzel, Masahiro Yamada
On 17.07.2018 16:15, Greg Kroah-Hartman wrote:
> On Tue, Jul 17, 2018 at 03:57:21PM +0300, Konstantin Khlebnikov wrote:
>> This commit depends on commit 9564a8cf422d7b58f6e857e3546d346fa970191e
>> "Kbuild: fix # escaping in .cmd files for future Make"
>> which is missing in 4.4.141
>>
>>
>> this breaks compilation of tools/perf for me
>>
>> make -C tools/perf V=1 JOBS=24 WERROR=0 NO_GTK2=1 LDFLAGS=-static all
>> make[1]: Entering directory `/tmp/buildd/linux-yandex-4.4.141/tools/perf'
>> BUILD: Doing 'make -j24' parallel build
>>
>> Auto-detecting system features:
>> ... dwarf: [ on ]
>> ... dwarf_getlocations: [ OFF ]
>> ... glibc: [ on ]
>> ... gtk2: [ OFF ]
>> ... libaudit: [ on ]
>> ... libbfd: [ on ]
>> ... libelf: [ on ]
>> ... libnuma: [ on ]
>> ... numa_num_possible_cpus: [ on ]
>> ... libperl: [ OFF ]
>> ... libpython: [ OFF ]
>> ... libslang: [ on ]
>> ... libunwind: [ on ]
>> ... libdw-dwarf-unwind: [ OFF ]
>> ... zlib: [ on ]
>> ... lzma: [ on ]
>> ... get_cpuid: [ on ]
>> ... bpf: [ on ]
>>
>> config/Makefile:274: No libdw DWARF unwind found, Please install elfutils-devel/libdw-dev >= 0.158 and/or set LIBDW_DIR
>> config/Makefile:282: Old libdw.h, finding variables at given 'perf probe' point will not work, install elfutils-devel/libdw-dev >= 0.157
>> config/Makefile:458: Missing perl devel files. Disabling perl scripting support, please install perl-ExtUtils-Embed/libperl-dev
>> config/Makefile:501: No 'Python.h' (for Python 2.x support) was found: disables Python support - please install python-devel/python-dev
>> $(:)
>> make -C /tmp/buildd/linux-yandex-4.4.141/tools/build fixdep
>> /bin/sh util/PERF-VERSION-GEN
>> make -f /tmp/buildd/linux-yandex-4.4.141/tools/build/Makefile.build dir=. obj=fixdep
>> . util/generate-cmdlist.sh > common-cmds.h+ && mv common-cmds.h+ common-cmds.h
>> .fixdep.o.cmd:1: *** missing separator. Stop.
>> make[3]: *** [fixdep-in.o] Error 2
>> make[2]: *** [fixdep] Error 2
>
> Ok, backporting the Makefile fixes resolves this issue. But perf still
> fails to build for me due to some futex errors, which is odd, do you see
> that too?
Compilation fails only for modern glibc, like in ubuntu 18.04 bionic.
Xenial 16.04 and precise 12.04 are fine.
I've bisected to indirect fix in linux 4.8
commit cec07f53c398f22576df77052c4777dc13f14962
("perf tools: Move syscall number fallbacks from perf-sys.h to tools/arch/x86/include/asm/")
To 4.4.y it applies clearly.
>
> thanks,
>
> greg k-h
>
^ permalink raw reply [flat|nested] 53+ messages in thread* Re: [PATCH 4.4 14/43] tools build: fix # escaping in .cmd files for future Make
2018-07-17 19:51 ` Konstantin Khlebnikov
@ 2018-07-18 8:24 ` Greg Kroah-Hartman
0 siblings, 0 replies; 53+ messages in thread
From: Greg Kroah-Hartman @ 2018-07-18 8:24 UTC (permalink / raw)
To: Konstantin Khlebnikov
Cc: linux-kernel, stable, Randy Dunlap, Rasmus Villemoes,
Paul Menzel, Masahiro Yamada
On Tue, Jul 17, 2018 at 10:51:29PM +0300, Konstantin Khlebnikov wrote:
> On 17.07.2018 16:15, Greg Kroah-Hartman wrote:
> > On Tue, Jul 17, 2018 at 03:57:21PM +0300, Konstantin Khlebnikov wrote:
> > > This commit depends on commit 9564a8cf422d7b58f6e857e3546d346fa970191e
> > > "Kbuild: fix # escaping in .cmd files for future Make"
> > > which is missing in 4.4.141
> > >
> > >
> > > this breaks compilation of tools/perf for me
> > >
> > > make -C tools/perf V=1 JOBS=24 WERROR=0 NO_GTK2=1 LDFLAGS=-static all
> > > make[1]: Entering directory `/tmp/buildd/linux-yandex-4.4.141/tools/perf'
> > > BUILD: Doing 'make -j24' parallel build
> > >
> > > Auto-detecting system features:
> > > ... dwarf: [ on ]
> > > ... dwarf_getlocations: [ OFF ]
> > > ... glibc: [ on ]
> > > ... gtk2: [ OFF ]
> > > ... libaudit: [ on ]
> > > ... libbfd: [ on ]
> > > ... libelf: [ on ]
> > > ... libnuma: [ on ]
> > > ... numa_num_possible_cpus: [ on ]
> > > ... libperl: [ OFF ]
> > > ... libpython: [ OFF ]
> > > ... libslang: [ on ]
> > > ... libunwind: [ on ]
> > > ... libdw-dwarf-unwind: [ OFF ]
> > > ... zlib: [ on ]
> > > ... lzma: [ on ]
> > > ... get_cpuid: [ on ]
> > > ... bpf: [ on ]
> > >
> > > config/Makefile:274: No libdw DWARF unwind found, Please install elfutils-devel/libdw-dev >= 0.158 and/or set LIBDW_DIR
> > > config/Makefile:282: Old libdw.h, finding variables at given 'perf probe' point will not work, install elfutils-devel/libdw-dev >= 0.157
> > > config/Makefile:458: Missing perl devel files. Disabling perl scripting support, please install perl-ExtUtils-Embed/libperl-dev
> > > config/Makefile:501: No 'Python.h' (for Python 2.x support) was found: disables Python support - please install python-devel/python-dev
> > > $(:)
> > > make -C /tmp/buildd/linux-yandex-4.4.141/tools/build fixdep
> > > /bin/sh util/PERF-VERSION-GEN
> > > make -f /tmp/buildd/linux-yandex-4.4.141/tools/build/Makefile.build dir=. obj=fixdep
> > > . util/generate-cmdlist.sh > common-cmds.h+ && mv common-cmds.h+ common-cmds.h
> > > .fixdep.o.cmd:1: *** missing separator. Stop.
> > > make[3]: *** [fixdep-in.o] Error 2
> > > make[2]: *** [fixdep] Error 2
> >
> > Ok, backporting the Makefile fixes resolves this issue. But perf still
> > fails to build for me due to some futex errors, which is odd, do you see
> > that too?
>
> Compilation fails only for modern glibc, like in ubuntu 18.04 bionic.
> Xenial 16.04 and precise 12.04 are fine.
>
> I've bisected to indirect fix in linux 4.8
> commit cec07f53c398f22576df77052c4777dc13f14962
> ("perf tools: Move syscall number fallbacks from perf-sys.h to tools/arch/x86/include/asm/")
>
> To 4.4.y it applies clearly.
Yes! Thanks for figuring this out, it's been bothering me for a while
now. Now queued up.
greg k-h
^ permalink raw reply [flat|nested] 53+ messages in thread
* [PATCH 4.4 15/43] iw_cxgb4: correctly enforce the max reg_mr depth
2018-07-16 7:36 [PATCH 4.4 00/43] 4.4.141-stable review Greg Kroah-Hartman
` (13 preceding siblings ...)
2018-07-16 7:36 ` [PATCH 4.4 14/43] tools build: fix # escaping in .cmd files for future Make Greg Kroah-Hartman
@ 2018-07-16 7:36 ` Greg Kroah-Hartman
2018-07-16 7:36 ` [PATCH 4.4 16/43] x86/cpufeature: Move some of the scattered feature bits to x86_capability Greg Kroah-Hartman
` (30 subsequent siblings)
45 siblings, 0 replies; 53+ messages in thread
From: Greg Kroah-Hartman @ 2018-07-16 7:36 UTC (permalink / raw)
To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Steve Wise, Jason Gunthorpe
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Steve Wise <swise@opengridcomputing.com>
commit 7b72717a20bba8bdd01b14c0460be7d15061cd6b upstream.
The code was mistakenly using the length of the page array memory instead
of the depth of the page array.
This would cause MR creation to fail in some cases.
Fixes: 8376b86de7d3 ("iw_cxgb4: Support the new memory registration API")
Cc: stable@vger.kernel.org
Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/infiniband/hw/cxgb4/mem.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/infiniband/hw/cxgb4/mem.c
+++ b/drivers/infiniband/hw/cxgb4/mem.c
@@ -926,7 +926,7 @@ static int c4iw_set_page(struct ib_mr *i
{
struct c4iw_mr *mhp = to_c4iw_mr(ibmr);
- if (unlikely(mhp->mpl_len == mhp->max_mpl_len))
+ if (unlikely(mhp->mpl_len == mhp->attr.pbl_size))
return -ENOMEM;
mhp->mpl[mhp->mpl_len++] = addr;
^ permalink raw reply [flat|nested] 53+ messages in thread* [PATCH 4.4 16/43] x86/cpufeature: Move some of the scattered feature bits to x86_capability
2018-07-16 7:36 [PATCH 4.4 00/43] 4.4.141-stable review Greg Kroah-Hartman
` (14 preceding siblings ...)
2018-07-16 7:36 ` [PATCH 4.4 15/43] iw_cxgb4: correctly enforce the max reg_mr depth Greg Kroah-Hartman
@ 2018-07-16 7:36 ` Greg Kroah-Hartman
2018-07-16 7:36 ` [PATCH 4.4 17/43] x86/cpufeature: Cleanup get_cpu_cap() Greg Kroah-Hartman
` (29 subsequent siblings)
45 siblings, 0 replies; 53+ messages in thread
From: Greg Kroah-Hartman @ 2018-07-16 7:36 UTC (permalink / raw)
To: linux-kernel
Cc: Greg Kroah-Hartman, stable, Borislav Petkov, Thomas Gleixner,
Srivatsa S. Bhat, Matt Helsley (VMware),
Alexey Makhalov, Bo Gan
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Borislav Petkov <bp@suse.de>
commit 2ccd71f1b278d450a6f8c8c737c7fe237ca06dc6 upstream
Turn the CPUID leafs which are proper CPUID feature bit leafs into
separate ->x86_capability words.
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: http://lkml.kernel.org/r/1449481182-27541-2-git-send-email-bp@alien8.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Srivatsa S. Bhat <srivatsa@csail.mit.edu>
Reviewed-by: Matt Helsley (VMware) <matt.helsley@gmail.com>
Reviewed-by: Alexey Makhalov <amakhalov@vmware.com>
Reviewed-by: Bo Gan <ganb@vmware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/x86/include/asm/cpufeature.h | 54 ++++++++++++++++++++++----------------
arch/x86/kernel/cpu/common.c | 5 +++
arch/x86/kernel/cpu/scattered.c | 20 --------------
3 files changed, 37 insertions(+), 42 deletions(-)
--- a/arch/x86/include/asm/cpufeature.h
+++ b/arch/x86/include/asm/cpufeature.h
@@ -12,7 +12,7 @@
#include <asm/disabled-features.h>
#endif
-#define NCAPINTS 14 /* N 32-bit words worth of info */
+#define NCAPINTS 16 /* N 32-bit words worth of info */
#define NBUGINTS 1 /* N 32-bit bug flags */
/*
@@ -181,23 +181,18 @@
/*
* Auxiliary flags: Linux defined - For features scattered in various
- * CPUID levels like 0x6, 0xA etc, word 7
+ * CPUID levels like 0x6, 0xA etc, word 7.
+ *
+ * Reuse free bits when adding new feature flags!
*/
-#define X86_FEATURE_IDA ( 7*32+ 0) /* Intel Dynamic Acceleration */
-#define X86_FEATURE_ARAT ( 7*32+ 1) /* Always Running APIC Timer */
+
#define X86_FEATURE_CPB ( 7*32+ 2) /* AMD Core Performance Boost */
#define X86_FEATURE_EPB ( 7*32+ 3) /* IA32_ENERGY_PERF_BIAS support */
#define X86_FEATURE_INVPCID_SINGLE ( 7*32+ 4) /* Effectively INVPCID && CR4.PCIDE=1 */
-#define X86_FEATURE_PLN ( 7*32+ 5) /* Intel Power Limit Notification */
-#define X86_FEATURE_PTS ( 7*32+ 6) /* Intel Package Thermal Status */
-#define X86_FEATURE_DTHERM ( 7*32+ 7) /* Digital Thermal Sensor */
+
#define X86_FEATURE_HW_PSTATE ( 7*32+ 8) /* AMD HW-PState */
#define X86_FEATURE_PROC_FEEDBACK ( 7*32+ 9) /* AMD ProcFeedbackInterface */
-#define X86_FEATURE_HWP ( 7*32+ 10) /* "hwp" Intel HWP */
-#define X86_FEATURE_HWP_NOTIFY ( 7*32+ 11) /* Intel HWP_NOTIFY */
-#define X86_FEATURE_HWP_ACT_WINDOW ( 7*32+ 12) /* Intel HWP_ACT_WINDOW */
-#define X86_FEATURE_HWP_EPP ( 7*32+13) /* Intel HWP_EPP */
-#define X86_FEATURE_HWP_PKG_REQ ( 7*32+14) /* Intel HWP_PKG_REQ */
+
#define X86_FEATURE_INTEL_PT ( 7*32+15) /* Intel Processor Trace */
#define X86_FEATURE_RSB_CTXSW ( 7*32+19) /* Fill RSB on context switches */
@@ -212,16 +207,7 @@
#define X86_FEATURE_FLEXPRIORITY ( 8*32+ 2) /* Intel FlexPriority */
#define X86_FEATURE_EPT ( 8*32+ 3) /* Intel Extended Page Table */
#define X86_FEATURE_VPID ( 8*32+ 4) /* Intel Virtual Processor ID */
-#define X86_FEATURE_NPT ( 8*32+ 5) /* AMD Nested Page Table support */
-#define X86_FEATURE_LBRV ( 8*32+ 6) /* AMD LBR Virtualization support */
-#define X86_FEATURE_SVML ( 8*32+ 7) /* "svm_lock" AMD SVM locking MSR */
-#define X86_FEATURE_NRIPS ( 8*32+ 8) /* "nrip_save" AMD SVM next_rip save */
-#define X86_FEATURE_TSCRATEMSR ( 8*32+ 9) /* "tsc_scale" AMD TSC scaling support */
-#define X86_FEATURE_VMCBCLEAN ( 8*32+10) /* "vmcb_clean" AMD VMCB clean bits support */
-#define X86_FEATURE_FLUSHBYASID ( 8*32+11) /* AMD flush-by-ASID support */
-#define X86_FEATURE_DECODEASSISTS ( 8*32+12) /* AMD Decode Assists support */
-#define X86_FEATURE_PAUSEFILTER ( 8*32+13) /* AMD filtered pause intercept */
-#define X86_FEATURE_PFTHRESHOLD ( 8*32+14) /* AMD pause filter threshold */
+
#define X86_FEATURE_VMMCALL ( 8*32+15) /* Prefer vmmcall to vmcall */
#define X86_FEATURE_XENPV ( 8*32+16) /* "" Xen paravirtual guest */
@@ -266,6 +252,30 @@
/* AMD-defined CPU features, CPUID level 0x80000008 (ebx), word 13 */
#define X86_FEATURE_CLZERO (13*32+0) /* CLZERO instruction */
+/* Thermal and Power Management Leaf, CPUID level 0x00000006 (eax), word 14 */
+#define X86_FEATURE_DTHERM (14*32+ 0) /* Digital Thermal Sensor */
+#define X86_FEATURE_IDA (14*32+ 1) /* Intel Dynamic Acceleration */
+#define X86_FEATURE_ARAT (14*32+ 2) /* Always Running APIC Timer */
+#define X86_FEATURE_PLN (14*32+ 4) /* Intel Power Limit Notification */
+#define X86_FEATURE_PTS (14*32+ 6) /* Intel Package Thermal Status */
+#define X86_FEATURE_HWP (14*32+ 7) /* Intel Hardware P-states */
+#define X86_FEATURE_HWP_NOTIFY (14*32+ 8) /* HWP Notification */
+#define X86_FEATURE_HWP_ACT_WINDOW (14*32+ 9) /* HWP Activity Window */
+#define X86_FEATURE_HWP_EPP (14*32+10) /* HWP Energy Perf. Preference */
+#define X86_FEATURE_HWP_PKG_REQ (14*32+11) /* HWP Package Level Request */
+
+/* AMD SVM Feature Identification, CPUID level 0x8000000a (edx), word 15 */
+#define X86_FEATURE_NPT (15*32+ 0) /* Nested Page Table support */
+#define X86_FEATURE_LBRV (15*32+ 1) /* LBR Virtualization support */
+#define X86_FEATURE_SVML (15*32+ 2) /* "svm_lock" SVM locking MSR */
+#define X86_FEATURE_NRIPS (15*32+ 3) /* "nrip_save" SVM next_rip save */
+#define X86_FEATURE_TSCRATEMSR (15*32+ 4) /* "tsc_scale" TSC scaling support */
+#define X86_FEATURE_VMCBCLEAN (15*32+ 5) /* "vmcb_clean" VMCB clean bits support */
+#define X86_FEATURE_FLUSHBYASID (15*32+ 6) /* flush-by-ASID support */
+#define X86_FEATURE_DECODEASSISTS (15*32+ 7) /* Decode Assists support */
+#define X86_FEATURE_PAUSEFILTER (15*32+10) /* filtered pause intercept */
+#define X86_FEATURE_PFTHRESHOLD (15*32+12) /* pause filter threshold */
+
/*
* BUG word(s)
*/
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -695,6 +695,8 @@ void get_cpu_cap(struct cpuinfo_x86 *c)
cpuid_count(0x00000007, 0, &eax, &ebx, &ecx, &edx);
c->x86_capability[9] = ebx;
+
+ c->x86_capability[14] = cpuid_eax(0x00000006);
}
/* Extended state features: level 0x0000000d */
@@ -756,6 +758,9 @@ void get_cpu_cap(struct cpuinfo_x86 *c)
if (c->extended_cpuid_level >= 0x80000007)
c->x86_power = cpuid_edx(0x80000007);
+ if (c->extended_cpuid_level >= 0x8000000a)
+ c->x86_capability[15] = cpuid_edx(0x8000000a);
+
init_scattered_cpuid_features(c);
}
--- a/arch/x86/kernel/cpu/scattered.c
+++ b/arch/x86/kernel/cpu/scattered.c
@@ -31,32 +31,12 @@ void init_scattered_cpuid_features(struc
const struct cpuid_bit *cb;
static const struct cpuid_bit cpuid_bits[] = {
- { X86_FEATURE_DTHERM, CR_EAX, 0, 0x00000006, 0 },
- { X86_FEATURE_IDA, CR_EAX, 1, 0x00000006, 0 },
- { X86_FEATURE_ARAT, CR_EAX, 2, 0x00000006, 0 },
- { X86_FEATURE_PLN, CR_EAX, 4, 0x00000006, 0 },
- { X86_FEATURE_PTS, CR_EAX, 6, 0x00000006, 0 },
- { X86_FEATURE_HWP, CR_EAX, 7, 0x00000006, 0 },
- { X86_FEATURE_HWP_NOTIFY, CR_EAX, 8, 0x00000006, 0 },
- { X86_FEATURE_HWP_ACT_WINDOW, CR_EAX, 9, 0x00000006, 0 },
- { X86_FEATURE_HWP_EPP, CR_EAX,10, 0x00000006, 0 },
- { X86_FEATURE_HWP_PKG_REQ, CR_EAX,11, 0x00000006, 0 },
{ X86_FEATURE_INTEL_PT, CR_EBX,25, 0x00000007, 0 },
{ X86_FEATURE_APERFMPERF, CR_ECX, 0, 0x00000006, 0 },
{ X86_FEATURE_EPB, CR_ECX, 3, 0x00000006, 0 },
{ X86_FEATURE_HW_PSTATE, CR_EDX, 7, 0x80000007, 0 },
{ X86_FEATURE_CPB, CR_EDX, 9, 0x80000007, 0 },
{ X86_FEATURE_PROC_FEEDBACK, CR_EDX,11, 0x80000007, 0 },
- { X86_FEATURE_NPT, CR_EDX, 0, 0x8000000a, 0 },
- { X86_FEATURE_LBRV, CR_EDX, 1, 0x8000000a, 0 },
- { X86_FEATURE_SVML, CR_EDX, 2, 0x8000000a, 0 },
- { X86_FEATURE_NRIPS, CR_EDX, 3, 0x8000000a, 0 },
- { X86_FEATURE_TSCRATEMSR, CR_EDX, 4, 0x8000000a, 0 },
- { X86_FEATURE_VMCBCLEAN, CR_EDX, 5, 0x8000000a, 0 },
- { X86_FEATURE_FLUSHBYASID, CR_EDX, 6, 0x8000000a, 0 },
- { X86_FEATURE_DECODEASSISTS, CR_EDX, 7, 0x8000000a, 0 },
- { X86_FEATURE_PAUSEFILTER, CR_EDX,10, 0x8000000a, 0 },
- { X86_FEATURE_PFTHRESHOLD, CR_EDX,12, 0x8000000a, 0 },
{ 0, 0, 0, 0, 0 }
};
^ permalink raw reply [flat|nested] 53+ messages in thread* [PATCH 4.4 17/43] x86/cpufeature: Cleanup get_cpu_cap()
2018-07-16 7:36 [PATCH 4.4 00/43] 4.4.141-stable review Greg Kroah-Hartman
` (15 preceding siblings ...)
2018-07-16 7:36 ` [PATCH 4.4 16/43] x86/cpufeature: Move some of the scattered feature bits to x86_capability Greg Kroah-Hartman
@ 2018-07-16 7:36 ` Greg Kroah-Hartman
2018-07-16 7:36 ` [PATCH 4.4 18/43] x86/cpu: Provide a config option to disable static_cpu_has Greg Kroah-Hartman
` (28 subsequent siblings)
45 siblings, 0 replies; 53+ messages in thread
From: Greg Kroah-Hartman @ 2018-07-16 7:36 UTC (permalink / raw)
To: linux-kernel
Cc: Greg Kroah-Hartman, stable, Borislav Petkov, Thomas Gleixner,
Srivatsa S. Bhat, Matt Helsley (VMware),
Alexey Makhalov, Bo Gan
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Borislav Petkov <bp@suse.de>
commit 39c06df4dc10a41de5fe706f4378ee5f09beba73 upstream
Add an enum for the ->x86_capability array indices and cleanup
get_cpu_cap() by killing some redundant local vars.
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: http://lkml.kernel.org/r/1449481182-27541-3-git-send-email-bp@alien8.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Srivatsa S. Bhat <srivatsa@csail.mit.edu>
Reviewed-by: Matt Helsley (VMware) <matt.helsley@gmail.com>
Reviewed-by: Alexey Makhalov <amakhalov@vmware.com>
Reviewed-by: Bo Gan <ganb@vmware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/x86/include/asm/cpufeature.h | 20 ++++++++++++++++
arch/x86/kernel/cpu/centaur.c | 2 -
arch/x86/kernel/cpu/common.c | 47 +++++++++++++++++---------------------
arch/x86/kernel/cpu/transmeta.c | 4 +--
4 files changed, 45 insertions(+), 28 deletions(-)
--- a/arch/x86/include/asm/cpufeature.h
+++ b/arch/x86/include/asm/cpufeature.h
@@ -299,6 +299,26 @@
#include <asm/asm.h>
#include <linux/bitops.h>
+enum cpuid_leafs
+{
+ CPUID_1_EDX = 0,
+ CPUID_8000_0001_EDX,
+ CPUID_8086_0001_EDX,
+ CPUID_LNX_1,
+ CPUID_1_ECX,
+ CPUID_C000_0001_EDX,
+ CPUID_8000_0001_ECX,
+ CPUID_LNX_2,
+ CPUID_LNX_3,
+ CPUID_7_0_EBX,
+ CPUID_D_1_EAX,
+ CPUID_F_0_EDX,
+ CPUID_F_1_EDX,
+ CPUID_8000_0008_EBX,
+ CPUID_6_EAX,
+ CPUID_8000_000A_EDX,
+};
+
#ifdef CONFIG_X86_FEATURE_NAMES
extern const char * const x86_cap_flags[NCAPINTS*32];
extern const char * const x86_power_flags[32];
--- a/arch/x86/kernel/cpu/centaur.c
+++ b/arch/x86/kernel/cpu/centaur.c
@@ -43,7 +43,7 @@ static void init_c3(struct cpuinfo_x86 *
/* store Centaur Extended Feature Flags as
* word 5 of the CPU capability bit array
*/
- c->x86_capability[5] = cpuid_edx(0xC0000001);
+ c->x86_capability[CPUID_C000_0001_EDX] = cpuid_edx(0xC0000001);
}
#ifdef CONFIG_X86_32
/* Cyrix III family needs CX8 & PGE explicitly enabled. */
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -676,52 +676,47 @@ static void apply_forced_caps(struct cpu
void get_cpu_cap(struct cpuinfo_x86 *c)
{
- u32 tfms, xlvl;
- u32 ebx;
+ u32 eax, ebx, ecx, edx;
/* Intel-defined flags: level 0x00000001 */
if (c->cpuid_level >= 0x00000001) {
- u32 capability, excap;
+ cpuid(0x00000001, &eax, &ebx, &ecx, &edx);
- cpuid(0x00000001, &tfms, &ebx, &excap, &capability);
- c->x86_capability[0] = capability;
- c->x86_capability[4] = excap;
+ c->x86_capability[CPUID_1_ECX] = ecx;
+ c->x86_capability[CPUID_1_EDX] = edx;
}
/* Additional Intel-defined flags: level 0x00000007 */
if (c->cpuid_level >= 0x00000007) {
- u32 eax, ebx, ecx, edx;
-
cpuid_count(0x00000007, 0, &eax, &ebx, &ecx, &edx);
- c->x86_capability[9] = ebx;
+ c->x86_capability[CPUID_7_0_EBX] = ebx;
- c->x86_capability[14] = cpuid_eax(0x00000006);
+ c->x86_capability[CPUID_6_EAX] = cpuid_eax(0x00000006);
}
/* Extended state features: level 0x0000000d */
if (c->cpuid_level >= 0x0000000d) {
- u32 eax, ebx, ecx, edx;
-
cpuid_count(0x0000000d, 1, &eax, &ebx, &ecx, &edx);
- c->x86_capability[10] = eax;
+ c->x86_capability[CPUID_D_1_EAX] = eax;
}
/* Additional Intel-defined flags: level 0x0000000F */
if (c->cpuid_level >= 0x0000000F) {
- u32 eax, ebx, ecx, edx;
/* QoS sub-leaf, EAX=0Fh, ECX=0 */
cpuid_count(0x0000000F, 0, &eax, &ebx, &ecx, &edx);
- c->x86_capability[11] = edx;
+ c->x86_capability[CPUID_F_0_EDX] = edx;
+
if (cpu_has(c, X86_FEATURE_CQM_LLC)) {
/* will be overridden if occupancy monitoring exists */
c->x86_cache_max_rmid = ebx;
/* QoS sub-leaf, EAX=0Fh, ECX=1 */
cpuid_count(0x0000000F, 1, &eax, &ebx, &ecx, &edx);
- c->x86_capability[12] = edx;
+ c->x86_capability[CPUID_F_1_EDX] = edx;
+
if (cpu_has(c, X86_FEATURE_CQM_OCCUP_LLC)) {
c->x86_cache_max_rmid = ecx;
c->x86_cache_occ_scale = ebx;
@@ -733,22 +728,24 @@ void get_cpu_cap(struct cpuinfo_x86 *c)
}
/* AMD-defined flags: level 0x80000001 */
- xlvl = cpuid_eax(0x80000000);
- c->extended_cpuid_level = xlvl;
+ eax = cpuid_eax(0x80000000);
+ c->extended_cpuid_level = eax;
+
+ if ((eax & 0xffff0000) == 0x80000000) {
+ if (eax >= 0x80000001) {
+ cpuid(0x80000001, &eax, &ebx, &ecx, &edx);
- if ((xlvl & 0xffff0000) == 0x80000000) {
- if (xlvl >= 0x80000001) {
- c->x86_capability[1] = cpuid_edx(0x80000001);
- c->x86_capability[6] = cpuid_ecx(0x80000001);
+ c->x86_capability[CPUID_8000_0001_ECX] = ecx;
+ c->x86_capability[CPUID_8000_0001_EDX] = edx;
}
}
if (c->extended_cpuid_level >= 0x80000008) {
- u32 eax = cpuid_eax(0x80000008);
+ cpuid(0x80000008, &eax, &ebx, &ecx, &edx);
c->x86_virt_bits = (eax >> 8) & 0xff;
c->x86_phys_bits = eax & 0xff;
- c->x86_capability[13] = cpuid_ebx(0x80000008);
+ c->x86_capability[CPUID_8000_0008_EBX] = ebx;
}
#ifdef CONFIG_X86_32
else if (cpu_has(c, X86_FEATURE_PAE) || cpu_has(c, X86_FEATURE_PSE36))
@@ -759,7 +756,7 @@ void get_cpu_cap(struct cpuinfo_x86 *c)
c->x86_power = cpuid_edx(0x80000007);
if (c->extended_cpuid_level >= 0x8000000a)
- c->x86_capability[15] = cpuid_edx(0x8000000a);
+ c->x86_capability[CPUID_8000_000A_EDX] = cpuid_edx(0x8000000a);
init_scattered_cpuid_features(c);
}
--- a/arch/x86/kernel/cpu/transmeta.c
+++ b/arch/x86/kernel/cpu/transmeta.c
@@ -12,7 +12,7 @@ static void early_init_transmeta(struct
xlvl = cpuid_eax(0x80860000);
if ((xlvl & 0xffff0000) == 0x80860000) {
if (xlvl >= 0x80860001)
- c->x86_capability[2] = cpuid_edx(0x80860001);
+ c->x86_capability[CPUID_8086_0001_EDX] = cpuid_edx(0x80860001);
}
}
@@ -82,7 +82,7 @@ static void init_transmeta(struct cpuinf
/* Unhide possibly hidden capability flags */
rdmsr(0x80860004, cap_mask, uk);
wrmsr(0x80860004, ~0, uk);
- c->x86_capability[0] = cpuid_edx(0x00000001);
+ c->x86_capability[CPUID_1_EDX] = cpuid_edx(0x00000001);
wrmsr(0x80860004, cap_mask, uk);
/* All Transmeta CPUs have a constant TSC */
^ permalink raw reply [flat|nested] 53+ messages in thread* [PATCH 4.4 18/43] x86/cpu: Provide a config option to disable static_cpu_has
2018-07-16 7:36 [PATCH 4.4 00/43] 4.4.141-stable review Greg Kroah-Hartman
` (16 preceding siblings ...)
2018-07-16 7:36 ` [PATCH 4.4 17/43] x86/cpufeature: Cleanup get_cpu_cap() Greg Kroah-Hartman
@ 2018-07-16 7:36 ` Greg Kroah-Hartman
2018-07-16 7:36 ` [PATCH 4.4 19/43] x86/fpu: Add an XSTATE_OP() macro Greg Kroah-Hartman
` (27 subsequent siblings)
45 siblings, 0 replies; 53+ messages in thread
From: Greg Kroah-Hartman @ 2018-07-16 7:36 UTC (permalink / raw)
To: linux-kernel
Cc: Greg Kroah-Hartman, stable, Borislav Petkov, Josh Triplett,
Thomas Gleixner, Srivatsa S. Bhat, Matt Helsley (VMware),
Alexey Makhalov, Bo Gan
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Borislav Petkov <bp@suse.de>
commit 6e1315fe82308cd29e7550eab967262e8bbc71a3 upstream
This brings .text savings of about ~1.6K when building a tinyconfig. It
is off by default so nothing changes for the default.
Kconfig help text from Josh.
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Link: http://lkml.kernel.org/r/1449481182-27541-5-git-send-email-bp@alien8.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Srivatsa S. Bhat <srivatsa@csail.mit.edu>
Reviewed-by: Matt Helsley (VMware) <matt.helsley@gmail.com>
Reviewed-by: Alexey Makhalov <amakhalov@vmware.com>
Reviewed-by: Bo Gan <ganb@vmware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/x86/Kconfig | 11 +++++++++++
arch/x86/include/asm/cpufeature.h | 2 +-
2 files changed, 12 insertions(+), 1 deletion(-)
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -346,6 +346,17 @@ config X86_FEATURE_NAMES
If in doubt, say Y.
+config X86_FAST_FEATURE_TESTS
+ bool "Fast CPU feature tests" if EMBEDDED
+ default y
+ ---help---
+ Some fast-paths in the kernel depend on the capabilities of the CPU.
+ Say Y here for the kernel to patch in the appropriate code at runtime
+ based on the capabilities of the CPU. The infrastructure for patching
+ code at runtime takes up some additional space; space-constrained
+ embedded systems may wish to say N here to produce smaller, slightly
+ slower code.
+
config X86_X2APIC
bool "Support x2apic"
depends on X86_LOCAL_APIC && X86_64 && (IRQ_REMAP || HYPERVISOR_GUEST)
--- a/arch/x86/include/asm/cpufeature.h
+++ b/arch/x86/include/asm/cpufeature.h
@@ -422,7 +422,7 @@ extern const char * const x86_bug_flags[
* fast paths and boot_cpu_has() otherwise!
*/
-#if __GNUC__ >= 4
+#if __GNUC__ >= 4 && defined(CONFIG_X86_FAST_FEATURE_TESTS)
extern void warn_pre_alternatives(void);
extern bool __static_cpu_has_safe(u16 bit);
^ permalink raw reply [flat|nested] 53+ messages in thread* [PATCH 4.4 19/43] x86/fpu: Add an XSTATE_OP() macro
2018-07-16 7:36 [PATCH 4.4 00/43] 4.4.141-stable review Greg Kroah-Hartman
` (17 preceding siblings ...)
2018-07-16 7:36 ` [PATCH 4.4 18/43] x86/cpu: Provide a config option to disable static_cpu_has Greg Kroah-Hartman
@ 2018-07-16 7:36 ` Greg Kroah-Hartman
2018-07-16 7:36 ` [PATCH 4.4 20/43] x86/fpu: Get rid of xstate_fault() Greg Kroah-Hartman
` (26 subsequent siblings)
45 siblings, 0 replies; 53+ messages in thread
From: Greg Kroah-Hartman @ 2018-07-16 7:36 UTC (permalink / raw)
To: linux-kernel
Cc: Greg Kroah-Hartman, stable, Borislav Petkov, Andy Lutomirski,
Borislav Petkov, Brian Gerst, Dave Hansen, Denys Vlasenko,
Fenghua Yu, H. Peter Anvin, Linus Torvalds, Oleg Nesterov,
Peter Zijlstra, Quentin Casasnovas, Rik van Riel,
Thomas Gleixner, Ingo Molnar, Srivatsa S. Bhat,
Matt Helsley (VMware),
Alexey Makhalov, Bo Gan
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Borislav Petkov <bp@suse.de>
commit b74a0cf1b3db30173eefa00c411775d2b1697700 upstream
Add an XSTATE_OP() macro which contains the XSAVE* fault handling
and replace all non-alternatives users of xstate_fault() with
it.
This fixes also the buglet in copy_xregs_to_user() and
copy_user_to_xregs() where the inline asm didn't have @xstate as
memory reference and thus potentially causing unwanted
reordering of accesses to the extended state.
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Quentin Casasnovas <quentin.casasnovas@oracle.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1447932326-4371-2-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Srivatsa S. Bhat <srivatsa@csail.mit.edu>
Reviewed-by: Matt Helsley (VMware) <matt.helsley@gmail.com>
Reviewed-by: Alexey Makhalov <amakhalov@vmware.com>
Reviewed-by: Bo Gan <ganb@vmware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/x86/include/asm/fpu/internal.h | 68 ++++++++++++++++--------------------
1 file changed, 31 insertions(+), 37 deletions(-)
--- a/arch/x86/include/asm/fpu/internal.h
+++ b/arch/x86/include/asm/fpu/internal.h
@@ -238,6 +238,20 @@ static inline void copy_fxregs_to_kernel
_ASM_EXTABLE(1b, 3b) \
: [_err] "=r" (__err)
+#define XSTATE_OP(op, st, lmask, hmask, err) \
+ asm volatile("1:" op "\n\t" \
+ "xor %[err], %[err]\n" \
+ "2:\n\t" \
+ ".pushsection .fixup,\"ax\"\n\t" \
+ "3: movl $-2,%[err]\n\t" \
+ "jmp 2b\n\t" \
+ ".popsection\n\t" \
+ _ASM_EXTABLE(1b, 3b) \
+ : [err] "=r" (err) \
+ : "D" (st), "m" (*st), "a" (lmask), "d" (hmask) \
+ : "memory")
+
+
/*
* This function is called only during boot time when x86 caps are not set
* up and alternative can not be used yet.
@@ -247,22 +261,14 @@ static inline void copy_xregs_to_kernel_
u64 mask = -1;
u32 lmask = mask;
u32 hmask = mask >> 32;
- int err = 0;
+ int err;
WARN_ON(system_state != SYSTEM_BOOTING);
- if (boot_cpu_has(X86_FEATURE_XSAVES))
- asm volatile("1:"XSAVES"\n\t"
- "2:\n\t"
- xstate_fault(err)
- : "D" (xstate), "m" (*xstate), "a" (lmask), "d" (hmask), "0" (err)
- : "memory");
+ if (static_cpu_has_safe(X86_FEATURE_XSAVES))
+ XSTATE_OP(XSAVES, xstate, lmask, hmask, err);
else
- asm volatile("1:"XSAVE"\n\t"
- "2:\n\t"
- xstate_fault(err)
- : "D" (xstate), "m" (*xstate), "a" (lmask), "d" (hmask), "0" (err)
- : "memory");
+ XSTATE_OP(XSAVE, xstate, lmask, hmask, err);
/* We should never fault when copying to a kernel buffer: */
WARN_ON_FPU(err);
@@ -277,22 +283,14 @@ static inline void copy_kernel_to_xregs_
u64 mask = -1;
u32 lmask = mask;
u32 hmask = mask >> 32;
- int err = 0;
+ int err;
WARN_ON(system_state != SYSTEM_BOOTING);
- if (boot_cpu_has(X86_FEATURE_XSAVES))
- asm volatile("1:"XRSTORS"\n\t"
- "2:\n\t"
- xstate_fault(err)
- : "D" (xstate), "m" (*xstate), "a" (lmask), "d" (hmask), "0" (err)
- : "memory");
+ if (static_cpu_has_safe(X86_FEATURE_XSAVES))
+ XSTATE_OP(XRSTORS, xstate, lmask, hmask, err);
else
- asm volatile("1:"XRSTOR"\n\t"
- "2:\n\t"
- xstate_fault(err)
- : "D" (xstate), "m" (*xstate), "a" (lmask), "d" (hmask), "0" (err)
- : "memory");
+ XSTATE_OP(XRSTOR, xstate, lmask, hmask, err);
/* We should never fault when copying from a kernel buffer: */
WARN_ON_FPU(err);
@@ -389,12 +387,10 @@ static inline int copy_xregs_to_user(str
if (unlikely(err))
return -EFAULT;
- __asm__ __volatile__(ASM_STAC "\n"
- "1:"XSAVE"\n"
- "2: " ASM_CLAC "\n"
- xstate_fault(err)
- : "D" (buf), "a" (-1), "d" (-1), "0" (err)
- : "memory");
+ stac();
+ XSTATE_OP(XSAVE, buf, -1, -1, err);
+ clac();
+
return err;
}
@@ -406,14 +402,12 @@ static inline int copy_user_to_xregs(str
struct xregs_state *xstate = ((__force struct xregs_state *)buf);
u32 lmask = mask;
u32 hmask = mask >> 32;
- int err = 0;
+ int err;
+
+ stac();
+ XSTATE_OP(XRSTOR, xstate, lmask, hmask, err);
+ clac();
- __asm__ __volatile__(ASM_STAC "\n"
- "1:"XRSTOR"\n"
- "2: " ASM_CLAC "\n"
- xstate_fault(err)
- : "D" (xstate), "a" (lmask), "d" (hmask), "0" (err)
- : "memory"); /* memory required? */
return err;
}
^ permalink raw reply [flat|nested] 53+ messages in thread* [PATCH 4.4 20/43] x86/fpu: Get rid of xstate_fault()
2018-07-16 7:36 [PATCH 4.4 00/43] 4.4.141-stable review Greg Kroah-Hartman
` (18 preceding siblings ...)
2018-07-16 7:36 ` [PATCH 4.4 19/43] x86/fpu: Add an XSTATE_OP() macro Greg Kroah-Hartman
@ 2018-07-16 7:36 ` Greg Kroah-Hartman
2018-07-16 7:36 ` [PATCH 4.4 21/43] x86/headers: Dont include asm/processor.h in asm/atomic.h Greg Kroah-Hartman
` (25 subsequent siblings)
45 siblings, 0 replies; 53+ messages in thread
From: Greg Kroah-Hartman @ 2018-07-16 7:36 UTC (permalink / raw)
To: linux-kernel
Cc: Greg Kroah-Hartman, stable, Borislav Petkov, Andy Lutomirski,
Borislav Petkov, Brian Gerst, Dave Hansen, Denys Vlasenko,
Fenghua Yu, H. Peter Anvin, Linus Torvalds, Oleg Nesterov,
Peter Zijlstra, Quentin Casasnovas, Rik van Riel,
Thomas Gleixner, Ingo Molnar, Srivatsa S. Bhat,
Matt Helsley (VMware),
Alexey Makhalov, Bo Gan
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Borislav Petkov <bp@suse.de>
commit b7106fa0f29f9fd83d2d1905ab690d334ef855c1 upstream
Add macros for the alternative XSAVE*/XRSTOR* operations which
contain the fault handling and use them. Kill xstate_fault().
Also, copy_xregs_to_kernel() didn't have the extended state as
memory reference in the asm.
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Quentin Casasnovas <quentin.casasnovas@oracle.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1447932326-4371-3-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Srivatsa S. Bhat <srivatsa@csail.mit.edu>
Reviewed-by: Matt Helsley (VMware) <matt.helsley@gmail.com>
Reviewed-by: Alexey Makhalov <amakhalov@vmware.com>
Reviewed-by: Bo Gan <ganb@vmware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/x86/include/asm/fpu/internal.h | 105 +++++++++++++++++-------------------
1 file changed, 52 insertions(+), 53 deletions(-)
--- a/arch/x86/include/asm/fpu/internal.h
+++ b/arch/x86/include/asm/fpu/internal.h
@@ -225,19 +225,6 @@ static inline void copy_fxregs_to_kernel
#define XRSTOR ".byte " REX_PREFIX "0x0f,0xae,0x2f"
#define XRSTORS ".byte " REX_PREFIX "0x0f,0xc7,0x1f"
-/* xstate instruction fault handler: */
-#define xstate_fault(__err) \
- \
- ".section .fixup,\"ax\"\n" \
- \
- "3: movl $-2,%[_err]\n" \
- " jmp 2b\n" \
- \
- ".previous\n" \
- \
- _ASM_EXTABLE(1b, 3b) \
- : [_err] "=r" (__err)
-
#define XSTATE_OP(op, st, lmask, hmask, err) \
asm volatile("1:" op "\n\t" \
"xor %[err], %[err]\n" \
@@ -251,6 +238,54 @@ static inline void copy_fxregs_to_kernel
: "D" (st), "m" (*st), "a" (lmask), "d" (hmask) \
: "memory")
+/*
+ * If XSAVES is enabled, it replaces XSAVEOPT because it supports a compact
+ * format and supervisor states in addition to modified optimization in
+ * XSAVEOPT.
+ *
+ * Otherwise, if XSAVEOPT is enabled, XSAVEOPT replaces XSAVE because XSAVEOPT
+ * supports modified optimization which is not supported by XSAVE.
+ *
+ * We use XSAVE as a fallback.
+ *
+ * The 661 label is defined in the ALTERNATIVE* macros as the address of the
+ * original instruction which gets replaced. We need to use it here as the
+ * address of the instruction where we might get an exception at.
+ */
+#define XSTATE_XSAVE(st, lmask, hmask, err) \
+ asm volatile(ALTERNATIVE_2(XSAVE, \
+ XSAVEOPT, X86_FEATURE_XSAVEOPT, \
+ XSAVES, X86_FEATURE_XSAVES) \
+ "\n" \
+ "xor %[err], %[err]\n" \
+ "3:\n" \
+ ".pushsection .fixup,\"ax\"\n" \
+ "4: movl $-2, %[err]\n" \
+ "jmp 3b\n" \
+ ".popsection\n" \
+ _ASM_EXTABLE(661b, 4b) \
+ : [err] "=r" (err) \
+ : "D" (st), "m" (*st), "a" (lmask), "d" (hmask) \
+ : "memory")
+
+/*
+ * Use XRSTORS to restore context if it is enabled. XRSTORS supports compact
+ * XSAVE area format.
+ */
+#define XSTATE_XRESTORE(st, lmask, hmask, err) \
+ asm volatile(ALTERNATIVE(XRSTOR, \
+ XRSTORS, X86_FEATURE_XSAVES) \
+ "\n" \
+ "xor %[err], %[err]\n" \
+ "3:\n" \
+ ".pushsection .fixup,\"ax\"\n" \
+ "4: movl $-2, %[err]\n" \
+ "jmp 3b\n" \
+ ".popsection\n" \
+ _ASM_EXTABLE(661b, 4b) \
+ : [err] "=r" (err) \
+ : "D" (st), "m" (*st), "a" (lmask), "d" (hmask) \
+ : "memory")
/*
* This function is called only during boot time when x86 caps are not set
@@ -304,33 +339,11 @@ static inline void copy_xregs_to_kernel(
u64 mask = -1;
u32 lmask = mask;
u32 hmask = mask >> 32;
- int err = 0;
+ int err;
WARN_ON(!alternatives_patched);
- /*
- * If xsaves is enabled, xsaves replaces xsaveopt because
- * it supports compact format and supervisor states in addition to
- * modified optimization in xsaveopt.
- *
- * Otherwise, if xsaveopt is enabled, xsaveopt replaces xsave
- * because xsaveopt supports modified optimization which is not
- * supported by xsave.
- *
- * If none of xsaves and xsaveopt is enabled, use xsave.
- */
- alternative_input_2(
- "1:"XSAVE,
- XSAVEOPT,
- X86_FEATURE_XSAVEOPT,
- XSAVES,
- X86_FEATURE_XSAVES,
- [xstate] "D" (xstate), "a" (lmask), "d" (hmask) :
- "memory");
- asm volatile("2:\n\t"
- xstate_fault(err)
- : "0" (err)
- : "memory");
+ XSTATE_XSAVE(xstate, lmask, hmask, err);
/* We should never fault when copying to a kernel buffer: */
WARN_ON_FPU(err);
@@ -343,23 +356,9 @@ static inline void copy_kernel_to_xregs(
{
u32 lmask = mask;
u32 hmask = mask >> 32;
- int err = 0;
+ int err;
- /*
- * Use xrstors to restore context if it is enabled. xrstors supports
- * compacted format of xsave area which is not supported by xrstor.
- */
- alternative_input(
- "1: " XRSTOR,
- XRSTORS,
- X86_FEATURE_XSAVES,
- "D" (xstate), "m" (*xstate), "a" (lmask), "d" (hmask)
- : "memory");
-
- asm volatile("2:\n"
- xstate_fault(err)
- : "0" (err)
- : "memory");
+ XSTATE_XRESTORE(xstate, lmask, hmask, err);
/* We should never fault when copying from a kernel buffer: */
WARN_ON_FPU(err);
^ permalink raw reply [flat|nested] 53+ messages in thread* [PATCH 4.4 21/43] x86/headers: Dont include asm/processor.h in asm/atomic.h
2018-07-16 7:36 [PATCH 4.4 00/43] 4.4.141-stable review Greg Kroah-Hartman
` (19 preceding siblings ...)
2018-07-16 7:36 ` [PATCH 4.4 20/43] x86/fpu: Get rid of xstate_fault() Greg Kroah-Hartman
@ 2018-07-16 7:36 ` Greg Kroah-Hartman
2018-07-16 7:36 ` [PATCH 4.4 22/43] x86/cpufeature: Carve out X86_FEATURE_* Greg Kroah-Hartman
` (24 subsequent siblings)
45 siblings, 0 replies; 53+ messages in thread
From: Greg Kroah-Hartman @ 2018-07-16 7:36 UTC (permalink / raw)
To: linux-kernel
Cc: Greg Kroah-Hartman, stable, Andi Kleen, Peter Zijlstra (Intel),
Arnaldo Carvalho de Melo, Jiri Olsa, Linus Torvalds,
Mike Galbraith, Stephane Eranian, Thomas Gleixner, Vince Weaver,
rostedt, Ingo Molnar, Srivatsa S. Bhat, Matt Helsley (VMware),
Alexey Makhalov, Bo Gan
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Andi Kleen <ak@linux.intel.com>
commit 153a4334c439cfb62e1d31cee0c790ba4157813d upstream
asm/atomic.h doesn't really need asm/processor.h anymore. Everything
it uses has moved to other header files. So remove that include.
processor.h is a nasty header that includes lots of
other headers and makes it prone to include loops. Removing the
include here makes asm/atomic.h a "leaf" header that can
be safely included in most other headers.
The only fallout is in the lib/atomic tester which relied on
this implicit include. Give it an explicit include.
(the include is in ifdef because the user is also in ifdef)
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: rostedt@goodmis.org
Link: http://lkml.kernel.org/r/1449018060-1742-1-git-send-email-andi@firstfloor.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Srivatsa S. Bhat <srivatsa@csail.mit.edu>
Reviewed-by: Matt Helsley (VMware) <matt.helsley@gmail.com>
Reviewed-by: Alexey Makhalov <amakhalov@vmware.com>
Reviewed-by: Bo Gan <ganb@vmware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/x86/include/asm/atomic.h | 1 -
arch/x86/include/asm/atomic64_32.h | 1 -
lib/atomic64_test.c | 4 ++++
3 files changed, 4 insertions(+), 2 deletions(-)
--- a/arch/x86/include/asm/atomic.h
+++ b/arch/x86/include/asm/atomic.h
@@ -3,7 +3,6 @@
#include <linux/compiler.h>
#include <linux/types.h>
-#include <asm/processor.h>
#include <asm/alternative.h>
#include <asm/cmpxchg.h>
#include <asm/rmwcc.h>
--- a/arch/x86/include/asm/atomic64_32.h
+++ b/arch/x86/include/asm/atomic64_32.h
@@ -3,7 +3,6 @@
#include <linux/compiler.h>
#include <linux/types.h>
-#include <asm/processor.h>
//#include <asm/cmpxchg.h>
/* An 64bit atomic type */
--- a/lib/atomic64_test.c
+++ b/lib/atomic64_test.c
@@ -16,6 +16,10 @@
#include <linux/kernel.h>
#include <linux/atomic.h>
+#ifdef CONFIG_X86
+#include <asm/processor.h> /* for boot_cpu_has below */
+#endif
+
#define TEST(bit, op, c_op, val) \
do { \
atomic##bit##_set(&v, v0); \
^ permalink raw reply [flat|nested] 53+ messages in thread* [PATCH 4.4 22/43] x86/cpufeature: Carve out X86_FEATURE_*
2018-07-16 7:36 [PATCH 4.4 00/43] 4.4.141-stable review Greg Kroah-Hartman
` (20 preceding siblings ...)
2018-07-16 7:36 ` [PATCH 4.4 21/43] x86/headers: Dont include asm/processor.h in asm/atomic.h Greg Kroah-Hartman
@ 2018-07-16 7:36 ` Greg Kroah-Hartman
2018-07-16 7:36 ` [PATCH 4.4 23/43] x86/cpufeature: Replace the old static_cpu_has() with safe variant Greg Kroah-Hartman
` (23 subsequent siblings)
45 siblings, 0 replies; 53+ messages in thread
From: Greg Kroah-Hartman @ 2018-07-16 7:36 UTC (permalink / raw)
To: linux-kernel
Cc: Greg Kroah-Hartman, stable, H. Peter Anvin, Borislav Petkov,
Andy Lutomirski, Borislav Petkov, Brian Gerst, Denys Vlasenko,
Linus Torvalds, Peter Zijlstra, Thomas Gleixner, Ingo Molnar,
Srivatsa S. Bhat, Matt Helsley (VMware),
Alexey Makhalov, Bo Gan
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Borislav Petkov <bp@suse.de>
commit cd4d09ec6f6c12a2cc3db5b7d8876a325a53545b upstream
Move them to a separate header and have the following
dependency:
x86/cpufeatures.h <- x86/processor.h <- x86/cpufeature.h
This makes it easier to use the header in asm code and not
include the whole cpufeature.h and add guards for asm.
Suggested-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1453842730-28463-5-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Srivatsa S. Bhat <srivatsa@csail.mit.edu>
Reviewed-by: Matt Helsley (VMware) <matt.helsley@gmail.com>
Reviewed-by: Alexey Makhalov <amakhalov@vmware.com>
Reviewed-by: Bo Gan <ganb@vmware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
Documentation/kernel-parameters.txt | 2
arch/x86/boot/cpuflags.h | 2
arch/x86/boot/mkcpustr.c | 2
arch/x86/crypto/crc32-pclmul_glue.c | 2
arch/x86/crypto/crc32c-intel_glue.c | 2
arch/x86/crypto/crct10dif-pclmul_glue.c | 2
arch/x86/entry/common.c | 1
arch/x86/entry/entry_32.S | 2
arch/x86/entry/vdso/vdso32-setup.c | 1
arch/x86/entry/vdso/vdso32/system_call.S | 2
arch/x86/entry/vdso/vma.c | 1
arch/x86/include/asm/alternative.h | 6
arch/x86/include/asm/apic.h | 1
arch/x86/include/asm/arch_hweight.h | 2
arch/x86/include/asm/cmpxchg.h | 1
arch/x86/include/asm/cpufeature.h | 293 ------------------------------
arch/x86/include/asm/cpufeatures.h | 297 +++++++++++++++++++++++++++++++
arch/x86/include/asm/fpu/internal.h | 1
arch/x86/include/asm/irq_work.h | 2
arch/x86/include/asm/mwait.h | 2
arch/x86/include/asm/nospec-branch.h | 2
arch/x86/include/asm/processor.h | 3
arch/x86/include/asm/smap.h | 2
arch/x86/include/asm/smp.h | 1
arch/x86/include/asm/thread_info.h | 2
arch/x86/include/asm/tlbflush.h | 1
arch/x86/include/asm/uaccess_64.h | 2
arch/x86/kernel/cpu/Makefile | 2
arch/x86/kernel/cpu/centaur.c | 2
arch/x86/kernel/cpu/cyrix.c | 1
arch/x86/kernel/cpu/intel.c | 2
arch/x86/kernel/cpu/intel_cacheinfo.c | 2
arch/x86/kernel/cpu/match.c | 2
arch/x86/kernel/cpu/mkcapflags.sh | 6
arch/x86/kernel/cpu/mtrr/main.c | 2
arch/x86/kernel/cpu/transmeta.c | 2
arch/x86/kernel/e820.c | 1
arch/x86/kernel/head_32.S | 2
arch/x86/kernel/hpet.c | 1
arch/x86/kernel/msr.c | 2
arch/x86/kernel/verify_cpu.S | 2
arch/x86/lib/clear_page_64.S | 2
arch/x86/lib/copy_page_64.S | 2
arch/x86/lib/copy_user_64.S | 2
arch/x86/lib/memcpy_64.S | 2
arch/x86/lib/memmove_64.S | 2
arch/x86/lib/memset_64.S | 2
arch/x86/lib/retpoline.S | 2
arch/x86/mm/setup_nx.c | 1
arch/x86/oprofile/op_model_amd.c | 1
arch/x86/um/asm/barrier.h | 2
lib/atomic64_test.c | 2
52 files changed, 347 insertions(+), 339 deletions(-)
create mode 100644 arch/x86/include/asm/cpufeatures.h
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -652,7 +652,7 @@ bytes respectively. Such letter suffixes
clearcpuid=BITNUM [X86]
Disable CPUID feature X for the kernel. See
- arch/x86/include/asm/cpufeature.h for the valid bit
+ arch/x86/include/asm/cpufeatures.h for the valid bit
numbers. Note the Linux specific bits are not necessarily
stable over kernel options, but the vendor specific
ones should be.
--- a/arch/x86/boot/cpuflags.h
+++ b/arch/x86/boot/cpuflags.h
@@ -1,7 +1,7 @@
#ifndef BOOT_CPUFLAGS_H
#define BOOT_CPUFLAGS_H
-#include <asm/cpufeature.h>
+#include <asm/cpufeatures.h>
#include <asm/processor-flags.h>
struct cpu_features {
--- a/arch/x86/boot/mkcpustr.c
+++ b/arch/x86/boot/mkcpustr.c
@@ -17,7 +17,7 @@
#include "../include/asm/required-features.h"
#include "../include/asm/disabled-features.h"
-#include "../include/asm/cpufeature.h"
+#include "../include/asm/cpufeatures.h"
#include "../kernel/cpu/capflags.c"
int main(void)
--- a/arch/x86/crypto/crc32-pclmul_glue.c
+++ b/arch/x86/crypto/crc32-pclmul_glue.c
@@ -33,7 +33,7 @@
#include <linux/crc32.h>
#include <crypto/internal/hash.h>
-#include <asm/cpufeature.h>
+#include <asm/cpufeatures.h>
#include <asm/cpu_device_id.h>
#include <asm/fpu/api.h>
--- a/arch/x86/crypto/crc32c-intel_glue.c
+++ b/arch/x86/crypto/crc32c-intel_glue.c
@@ -30,7 +30,7 @@
#include <linux/kernel.h>
#include <crypto/internal/hash.h>
-#include <asm/cpufeature.h>
+#include <asm/cpufeatures.h>
#include <asm/cpu_device_id.h>
#include <asm/fpu/internal.h>
--- a/arch/x86/crypto/crct10dif-pclmul_glue.c
+++ b/arch/x86/crypto/crct10dif-pclmul_glue.c
@@ -30,7 +30,7 @@
#include <linux/string.h>
#include <linux/kernel.h>
#include <asm/fpu/api.h>
-#include <asm/cpufeature.h>
+#include <asm/cpufeatures.h>
#include <asm/cpu_device_id.h>
asmlinkage __u16 crc_t10dif_pcl(__u16 crc, const unsigned char *buf,
--- a/arch/x86/entry/common.c
+++ b/arch/x86/entry/common.c
@@ -27,6 +27,7 @@
#include <asm/traps.h>
#include <asm/vdso.h>
#include <asm/uaccess.h>
+#include <asm/cpufeature.h>
#define CREATE_TRACE_POINTS
#include <trace/events/syscalls.h>
--- a/arch/x86/entry/entry_32.S
+++ b/arch/x86/entry/entry_32.S
@@ -40,7 +40,7 @@
#include <asm/processor-flags.h>
#include <asm/ftrace.h>
#include <asm/irq_vectors.h>
-#include <asm/cpufeature.h>
+#include <asm/cpufeatures.h>
#include <asm/alternative-asm.h>
#include <asm/asm.h>
#include <asm/smap.h>
--- a/arch/x86/entry/vdso/vdso32-setup.c
+++ b/arch/x86/entry/vdso/vdso32-setup.c
@@ -11,7 +11,6 @@
#include <linux/kernel.h>
#include <linux/mm_types.h>
-#include <asm/cpufeature.h>
#include <asm/processor.h>
#include <asm/vdso.h>
--- a/arch/x86/entry/vdso/vdso32/system_call.S
+++ b/arch/x86/entry/vdso/vdso32/system_call.S
@@ -3,7 +3,7 @@
*/
#include <asm/dwarf2.h>
-#include <asm/cpufeature.h>
+#include <asm/cpufeatures.h>
#include <asm/alternative-asm.h>
/*
--- a/arch/x86/entry/vdso/vma.c
+++ b/arch/x86/entry/vdso/vma.c
@@ -20,6 +20,7 @@
#include <asm/page.h>
#include <asm/hpet.h>
#include <asm/desc.h>
+#include <asm/cpufeature.h>
#if defined(CONFIG_X86_64)
unsigned int __read_mostly vdso64_enabled = 1;
--- a/arch/x86/include/asm/alternative.h
+++ b/arch/x86/include/asm/alternative.h
@@ -154,12 +154,6 @@ static inline int alternatives_text_rese
".popsection\n"
/*
- * This must be included *after* the definition of ALTERNATIVE due to
- * <asm/arch_hweight.h>
- */
-#include <asm/cpufeature.h>
-
-/*
* Alternative instructions for different CPU types or capabilities.
*
* This allows to use optimized instructions even on generic binary
--- a/arch/x86/include/asm/apic.h
+++ b/arch/x86/include/asm/apic.h
@@ -6,7 +6,6 @@
#include <asm/alternative.h>
#include <asm/cpufeature.h>
-#include <asm/processor.h>
#include <asm/apicdef.h>
#include <linux/atomic.h>
#include <asm/fixmap.h>
--- a/arch/x86/include/asm/arch_hweight.h
+++ b/arch/x86/include/asm/arch_hweight.h
@@ -1,6 +1,8 @@
#ifndef _ASM_X86_HWEIGHT_H
#define _ASM_X86_HWEIGHT_H
+#include <asm/cpufeatures.h>
+
#ifdef CONFIG_64BIT
/* popcnt %edi, %eax */
#define POPCNT32 ".byte 0xf3,0x0f,0xb8,0xc7"
--- a/arch/x86/include/asm/cmpxchg.h
+++ b/arch/x86/include/asm/cmpxchg.h
@@ -2,6 +2,7 @@
#define ASM_X86_CMPXCHG_H
#include <linux/compiler.h>
+#include <asm/cpufeatures.h>
#include <asm/alternative.h> /* Provides LOCK_PREFIX */
/*
--- a/arch/x86/include/asm/cpufeature.h
+++ b/arch/x86/include/asm/cpufeature.h
@@ -1,298 +1,7 @@
-/*
- * Defines x86 CPU feature bits
- */
#ifndef _ASM_X86_CPUFEATURE_H
#define _ASM_X86_CPUFEATURE_H
-#ifndef _ASM_X86_REQUIRED_FEATURES_H
-#include <asm/required-features.h>
-#endif
-
-#ifndef _ASM_X86_DISABLED_FEATURES_H
-#include <asm/disabled-features.h>
-#endif
-
-#define NCAPINTS 16 /* N 32-bit words worth of info */
-#define NBUGINTS 1 /* N 32-bit bug flags */
-
-/*
- * Note: If the comment begins with a quoted string, that string is used
- * in /proc/cpuinfo instead of the macro name. If the string is "",
- * this feature bit is not displayed in /proc/cpuinfo at all.
- */
-
-/* Intel-defined CPU features, CPUID level 0x00000001 (edx), word 0 */
-#define X86_FEATURE_FPU ( 0*32+ 0) /* Onboard FPU */
-#define X86_FEATURE_VME ( 0*32+ 1) /* Virtual Mode Extensions */
-#define X86_FEATURE_DE ( 0*32+ 2) /* Debugging Extensions */
-#define X86_FEATURE_PSE ( 0*32+ 3) /* Page Size Extensions */
-#define X86_FEATURE_TSC ( 0*32+ 4) /* Time Stamp Counter */
-#define X86_FEATURE_MSR ( 0*32+ 5) /* Model-Specific Registers */
-#define X86_FEATURE_PAE ( 0*32+ 6) /* Physical Address Extensions */
-#define X86_FEATURE_MCE ( 0*32+ 7) /* Machine Check Exception */
-#define X86_FEATURE_CX8 ( 0*32+ 8) /* CMPXCHG8 instruction */
-#define X86_FEATURE_APIC ( 0*32+ 9) /* Onboard APIC */
-#define X86_FEATURE_SEP ( 0*32+11) /* SYSENTER/SYSEXIT */
-#define X86_FEATURE_MTRR ( 0*32+12) /* Memory Type Range Registers */
-#define X86_FEATURE_PGE ( 0*32+13) /* Page Global Enable */
-#define X86_FEATURE_MCA ( 0*32+14) /* Machine Check Architecture */
-#define X86_FEATURE_CMOV ( 0*32+15) /* CMOV instructions */
- /* (plus FCMOVcc, FCOMI with FPU) */
-#define X86_FEATURE_PAT ( 0*32+16) /* Page Attribute Table */
-#define X86_FEATURE_PSE36 ( 0*32+17) /* 36-bit PSEs */
-#define X86_FEATURE_PN ( 0*32+18) /* Processor serial number */
-#define X86_FEATURE_CLFLUSH ( 0*32+19) /* CLFLUSH instruction */
-#define X86_FEATURE_DS ( 0*32+21) /* "dts" Debug Store */
-#define X86_FEATURE_ACPI ( 0*32+22) /* ACPI via MSR */
-#define X86_FEATURE_MMX ( 0*32+23) /* Multimedia Extensions */
-#define X86_FEATURE_FXSR ( 0*32+24) /* FXSAVE/FXRSTOR, CR4.OSFXSR */
-#define X86_FEATURE_XMM ( 0*32+25) /* "sse" */
-#define X86_FEATURE_XMM2 ( 0*32+26) /* "sse2" */
-#define X86_FEATURE_SELFSNOOP ( 0*32+27) /* "ss" CPU self snoop */
-#define X86_FEATURE_HT ( 0*32+28) /* Hyper-Threading */
-#define X86_FEATURE_ACC ( 0*32+29) /* "tm" Automatic clock control */
-#define X86_FEATURE_IA64 ( 0*32+30) /* IA-64 processor */
-#define X86_FEATURE_PBE ( 0*32+31) /* Pending Break Enable */
-
-/* AMD-defined CPU features, CPUID level 0x80000001, word 1 */
-/* Don't duplicate feature flags which are redundant with Intel! */
-#define X86_FEATURE_SYSCALL ( 1*32+11) /* SYSCALL/SYSRET */
-#define X86_FEATURE_MP ( 1*32+19) /* MP Capable. */
-#define X86_FEATURE_NX ( 1*32+20) /* Execute Disable */
-#define X86_FEATURE_MMXEXT ( 1*32+22) /* AMD MMX extensions */
-#define X86_FEATURE_FXSR_OPT ( 1*32+25) /* FXSAVE/FXRSTOR optimizations */
-#define X86_FEATURE_GBPAGES ( 1*32+26) /* "pdpe1gb" GB pages */
-#define X86_FEATURE_RDTSCP ( 1*32+27) /* RDTSCP */
-#define X86_FEATURE_LM ( 1*32+29) /* Long Mode (x86-64) */
-#define X86_FEATURE_3DNOWEXT ( 1*32+30) /* AMD 3DNow! extensions */
-#define X86_FEATURE_3DNOW ( 1*32+31) /* 3DNow! */
-
-/* Transmeta-defined CPU features, CPUID level 0x80860001, word 2 */
-#define X86_FEATURE_RECOVERY ( 2*32+ 0) /* CPU in recovery mode */
-#define X86_FEATURE_LONGRUN ( 2*32+ 1) /* Longrun power control */
-#define X86_FEATURE_LRTI ( 2*32+ 3) /* LongRun table interface */
-
-/* Other features, Linux-defined mapping, word 3 */
-/* This range is used for feature bits which conflict or are synthesized */
-#define X86_FEATURE_CXMMX ( 3*32+ 0) /* Cyrix MMX extensions */
-#define X86_FEATURE_K6_MTRR ( 3*32+ 1) /* AMD K6 nonstandard MTRRs */
-#define X86_FEATURE_CYRIX_ARR ( 3*32+ 2) /* Cyrix ARRs (= MTRRs) */
-#define X86_FEATURE_CENTAUR_MCR ( 3*32+ 3) /* Centaur MCRs (= MTRRs) */
-/* cpu types for specific tunings: */
-#define X86_FEATURE_K8 ( 3*32+ 4) /* "" Opteron, Athlon64 */
-#define X86_FEATURE_K7 ( 3*32+ 5) /* "" Athlon */
-#define X86_FEATURE_P3 ( 3*32+ 6) /* "" P3 */
-#define X86_FEATURE_P4 ( 3*32+ 7) /* "" P4 */
-#define X86_FEATURE_CONSTANT_TSC ( 3*32+ 8) /* TSC ticks at a constant rate */
-#define X86_FEATURE_UP ( 3*32+ 9) /* smp kernel running on up */
-/* free, was #define X86_FEATURE_FXSAVE_LEAK ( 3*32+10) * "" FXSAVE leaks FOP/FIP/FOP */
-#define X86_FEATURE_ARCH_PERFMON ( 3*32+11) /* Intel Architectural PerfMon */
-#define X86_FEATURE_PEBS ( 3*32+12) /* Precise-Event Based Sampling */
-#define X86_FEATURE_BTS ( 3*32+13) /* Branch Trace Store */
-#define X86_FEATURE_SYSCALL32 ( 3*32+14) /* "" syscall in ia32 userspace */
-#define X86_FEATURE_SYSENTER32 ( 3*32+15) /* "" sysenter in ia32 userspace */
-#define X86_FEATURE_REP_GOOD ( 3*32+16) /* rep microcode works well */
-#define X86_FEATURE_MFENCE_RDTSC ( 3*32+17) /* "" Mfence synchronizes RDTSC */
-#define X86_FEATURE_LFENCE_RDTSC ( 3*32+18) /* "" Lfence synchronizes RDTSC */
-/* free, was #define X86_FEATURE_11AP ( 3*32+19) * "" Bad local APIC aka 11AP */
-#define X86_FEATURE_NOPL ( 3*32+20) /* The NOPL (0F 1F) instructions */
-#define X86_FEATURE_ALWAYS ( 3*32+21) /* "" Always-present feature */
-#define X86_FEATURE_XTOPOLOGY ( 3*32+22) /* cpu topology enum extensions */
-#define X86_FEATURE_TSC_RELIABLE ( 3*32+23) /* TSC is known to be reliable */
-#define X86_FEATURE_NONSTOP_TSC ( 3*32+24) /* TSC does not stop in C states */
-/* free, was #define X86_FEATURE_CLFLUSH_MONITOR ( 3*32+25) * "" clflush reqd with monitor */
-#define X86_FEATURE_EXTD_APICID ( 3*32+26) /* has extended APICID (8 bits) */
-#define X86_FEATURE_AMD_DCM ( 3*32+27) /* multi-node processor */
-#define X86_FEATURE_APERFMPERF ( 3*32+28) /* APERFMPERF */
-/* free, was #define X86_FEATURE_EAGER_FPU ( 3*32+29) * "eagerfpu" Non lazy FPU restore */
-#define X86_FEATURE_NONSTOP_TSC_S3 ( 3*32+30) /* TSC doesn't stop in S3 state */
-
-/* Intel-defined CPU features, CPUID level 0x00000001 (ecx), word 4 */
-#define X86_FEATURE_XMM3 ( 4*32+ 0) /* "pni" SSE-3 */
-#define X86_FEATURE_PCLMULQDQ ( 4*32+ 1) /* PCLMULQDQ instruction */
-#define X86_FEATURE_DTES64 ( 4*32+ 2) /* 64-bit Debug Store */
-#define X86_FEATURE_MWAIT ( 4*32+ 3) /* "monitor" Monitor/Mwait support */
-#define X86_FEATURE_DSCPL ( 4*32+ 4) /* "ds_cpl" CPL Qual. Debug Store */
-#define X86_FEATURE_VMX ( 4*32+ 5) /* Hardware virtualization */
-#define X86_FEATURE_SMX ( 4*32+ 6) /* Safer mode */
-#define X86_FEATURE_EST ( 4*32+ 7) /* Enhanced SpeedStep */
-#define X86_FEATURE_TM2 ( 4*32+ 8) /* Thermal Monitor 2 */
-#define X86_FEATURE_SSSE3 ( 4*32+ 9) /* Supplemental SSE-3 */
-#define X86_FEATURE_CID ( 4*32+10) /* Context ID */
-#define X86_FEATURE_SDBG ( 4*32+11) /* Silicon Debug */
-#define X86_FEATURE_FMA ( 4*32+12) /* Fused multiply-add */
-#define X86_FEATURE_CX16 ( 4*32+13) /* CMPXCHG16B */
-#define X86_FEATURE_XTPR ( 4*32+14) /* Send Task Priority Messages */
-#define X86_FEATURE_PDCM ( 4*32+15) /* Performance Capabilities */
-#define X86_FEATURE_PCID ( 4*32+17) /* Process Context Identifiers */
-#define X86_FEATURE_DCA ( 4*32+18) /* Direct Cache Access */
-#define X86_FEATURE_XMM4_1 ( 4*32+19) /* "sse4_1" SSE-4.1 */
-#define X86_FEATURE_XMM4_2 ( 4*32+20) /* "sse4_2" SSE-4.2 */
-#define X86_FEATURE_X2APIC ( 4*32+21) /* x2APIC */
-#define X86_FEATURE_MOVBE ( 4*32+22) /* MOVBE instruction */
-#define X86_FEATURE_POPCNT ( 4*32+23) /* POPCNT instruction */
-#define X86_FEATURE_TSC_DEADLINE_TIMER ( 4*32+24) /* Tsc deadline timer */
-#define X86_FEATURE_AES ( 4*32+25) /* AES instructions */
-#define X86_FEATURE_XSAVE ( 4*32+26) /* XSAVE/XRSTOR/XSETBV/XGETBV */
-#define X86_FEATURE_OSXSAVE ( 4*32+27) /* "" XSAVE enabled in the OS */
-#define X86_FEATURE_AVX ( 4*32+28) /* Advanced Vector Extensions */
-#define X86_FEATURE_F16C ( 4*32+29) /* 16-bit fp conversions */
-#define X86_FEATURE_RDRAND ( 4*32+30) /* The RDRAND instruction */
-#define X86_FEATURE_HYPERVISOR ( 4*32+31) /* Running on a hypervisor */
-
-/* VIA/Cyrix/Centaur-defined CPU features, CPUID level 0xC0000001, word 5 */
-#define X86_FEATURE_XSTORE ( 5*32+ 2) /* "rng" RNG present (xstore) */
-#define X86_FEATURE_XSTORE_EN ( 5*32+ 3) /* "rng_en" RNG enabled */
-#define X86_FEATURE_XCRYPT ( 5*32+ 6) /* "ace" on-CPU crypto (xcrypt) */
-#define X86_FEATURE_XCRYPT_EN ( 5*32+ 7) /* "ace_en" on-CPU crypto enabled */
-#define X86_FEATURE_ACE2 ( 5*32+ 8) /* Advanced Cryptography Engine v2 */
-#define X86_FEATURE_ACE2_EN ( 5*32+ 9) /* ACE v2 enabled */
-#define X86_FEATURE_PHE ( 5*32+10) /* PadLock Hash Engine */
-#define X86_FEATURE_PHE_EN ( 5*32+11) /* PHE enabled */
-#define X86_FEATURE_PMM ( 5*32+12) /* PadLock Montgomery Multiplier */
-#define X86_FEATURE_PMM_EN ( 5*32+13) /* PMM enabled */
-
-/* More extended AMD flags: CPUID level 0x80000001, ecx, word 6 */
-#define X86_FEATURE_LAHF_LM ( 6*32+ 0) /* LAHF/SAHF in long mode */
-#define X86_FEATURE_CMP_LEGACY ( 6*32+ 1) /* If yes HyperThreading not valid */
-#define X86_FEATURE_SVM ( 6*32+ 2) /* Secure virtual machine */
-#define X86_FEATURE_EXTAPIC ( 6*32+ 3) /* Extended APIC space */
-#define X86_FEATURE_CR8_LEGACY ( 6*32+ 4) /* CR8 in 32-bit mode */
-#define X86_FEATURE_ABM ( 6*32+ 5) /* Advanced bit manipulation */
-#define X86_FEATURE_SSE4A ( 6*32+ 6) /* SSE-4A */
-#define X86_FEATURE_MISALIGNSSE ( 6*32+ 7) /* Misaligned SSE mode */
-#define X86_FEATURE_3DNOWPREFETCH ( 6*32+ 8) /* 3DNow prefetch instructions */
-#define X86_FEATURE_OSVW ( 6*32+ 9) /* OS Visible Workaround */
-#define X86_FEATURE_IBS ( 6*32+10) /* Instruction Based Sampling */
-#define X86_FEATURE_XOP ( 6*32+11) /* extended AVX instructions */
-#define X86_FEATURE_SKINIT ( 6*32+12) /* SKINIT/STGI instructions */
-#define X86_FEATURE_WDT ( 6*32+13) /* Watchdog timer */
-#define X86_FEATURE_LWP ( 6*32+15) /* Light Weight Profiling */
-#define X86_FEATURE_FMA4 ( 6*32+16) /* 4 operands MAC instructions */
-#define X86_FEATURE_TCE ( 6*32+17) /* translation cache extension */
-#define X86_FEATURE_NODEID_MSR ( 6*32+19) /* NodeId MSR */
-#define X86_FEATURE_TBM ( 6*32+21) /* trailing bit manipulations */
-#define X86_FEATURE_TOPOEXT ( 6*32+22) /* topology extensions CPUID leafs */
-#define X86_FEATURE_PERFCTR_CORE ( 6*32+23) /* core performance counter extensions */
-#define X86_FEATURE_PERFCTR_NB ( 6*32+24) /* NB performance counter extensions */
-#define X86_FEATURE_BPEXT (6*32+26) /* data breakpoint extension */
-#define X86_FEATURE_PERFCTR_L2 ( 6*32+28) /* L2 performance counter extensions */
-#define X86_FEATURE_MWAITX ( 6*32+29) /* MWAIT extension (MONITORX/MWAITX) */
-
-/*
- * Auxiliary flags: Linux defined - For features scattered in various
- * CPUID levels like 0x6, 0xA etc, word 7.
- *
- * Reuse free bits when adding new feature flags!
- */
-
-#define X86_FEATURE_CPB ( 7*32+ 2) /* AMD Core Performance Boost */
-#define X86_FEATURE_EPB ( 7*32+ 3) /* IA32_ENERGY_PERF_BIAS support */
-#define X86_FEATURE_INVPCID_SINGLE ( 7*32+ 4) /* Effectively INVPCID && CR4.PCIDE=1 */
-
-#define X86_FEATURE_HW_PSTATE ( 7*32+ 8) /* AMD HW-PState */
-#define X86_FEATURE_PROC_FEEDBACK ( 7*32+ 9) /* AMD ProcFeedbackInterface */
-
-#define X86_FEATURE_INTEL_PT ( 7*32+15) /* Intel Processor Trace */
-#define X86_FEATURE_RSB_CTXSW ( 7*32+19) /* Fill RSB on context switches */
-
-#define X86_FEATURE_RETPOLINE ( 7*32+29) /* Generic Retpoline mitigation for Spectre variant 2 */
-#define X86_FEATURE_RETPOLINE_AMD ( 7*32+30) /* AMD Retpoline mitigation for Spectre variant 2 */
-/* Because the ALTERNATIVE scheme is for members of the X86_FEATURE club... */
-#define X86_FEATURE_KAISER ( 7*32+31) /* CONFIG_PAGE_TABLE_ISOLATION w/o nokaiser */
-
-/* Virtualization flags: Linux defined, word 8 */
-#define X86_FEATURE_TPR_SHADOW ( 8*32+ 0) /* Intel TPR Shadow */
-#define X86_FEATURE_VNMI ( 8*32+ 1) /* Intel Virtual NMI */
-#define X86_FEATURE_FLEXPRIORITY ( 8*32+ 2) /* Intel FlexPriority */
-#define X86_FEATURE_EPT ( 8*32+ 3) /* Intel Extended Page Table */
-#define X86_FEATURE_VPID ( 8*32+ 4) /* Intel Virtual Processor ID */
-
-#define X86_FEATURE_VMMCALL ( 8*32+15) /* Prefer vmmcall to vmcall */
-#define X86_FEATURE_XENPV ( 8*32+16) /* "" Xen paravirtual guest */
-
-
-/* Intel-defined CPU features, CPUID level 0x00000007:0 (ebx), word 9 */
-#define X86_FEATURE_FSGSBASE ( 9*32+ 0) /* {RD/WR}{FS/GS}BASE instructions*/
-#define X86_FEATURE_TSC_ADJUST ( 9*32+ 1) /* TSC adjustment MSR 0x3b */
-#define X86_FEATURE_BMI1 ( 9*32+ 3) /* 1st group bit manipulation extensions */
-#define X86_FEATURE_HLE ( 9*32+ 4) /* Hardware Lock Elision */
-#define X86_FEATURE_AVX2 ( 9*32+ 5) /* AVX2 instructions */
-#define X86_FEATURE_SMEP ( 9*32+ 7) /* Supervisor Mode Execution Protection */
-#define X86_FEATURE_BMI2 ( 9*32+ 8) /* 2nd group bit manipulation extensions */
-#define X86_FEATURE_ERMS ( 9*32+ 9) /* Enhanced REP MOVSB/STOSB */
-#define X86_FEATURE_INVPCID ( 9*32+10) /* Invalidate Processor Context ID */
-#define X86_FEATURE_RTM ( 9*32+11) /* Restricted Transactional Memory */
-#define X86_FEATURE_CQM ( 9*32+12) /* Cache QoS Monitoring */
-#define X86_FEATURE_MPX ( 9*32+14) /* Memory Protection Extension */
-#define X86_FEATURE_AVX512F ( 9*32+16) /* AVX-512 Foundation */
-#define X86_FEATURE_RDSEED ( 9*32+18) /* The RDSEED instruction */
-#define X86_FEATURE_ADX ( 9*32+19) /* The ADCX and ADOX instructions */
-#define X86_FEATURE_SMAP ( 9*32+20) /* Supervisor Mode Access Prevention */
-#define X86_FEATURE_PCOMMIT ( 9*32+22) /* PCOMMIT instruction */
-#define X86_FEATURE_CLFLUSHOPT ( 9*32+23) /* CLFLUSHOPT instruction */
-#define X86_FEATURE_CLWB ( 9*32+24) /* CLWB instruction */
-#define X86_FEATURE_AVX512PF ( 9*32+26) /* AVX-512 Prefetch */
-#define X86_FEATURE_AVX512ER ( 9*32+27) /* AVX-512 Exponential and Reciprocal */
-#define X86_FEATURE_AVX512CD ( 9*32+28) /* AVX-512 Conflict Detection */
-#define X86_FEATURE_SHA_NI ( 9*32+29) /* SHA1/SHA256 Instruction Extensions */
-
-/* Extended state features, CPUID level 0x0000000d:1 (eax), word 10 */
-#define X86_FEATURE_XSAVEOPT (10*32+ 0) /* XSAVEOPT */
-#define X86_FEATURE_XSAVEC (10*32+ 1) /* XSAVEC */
-#define X86_FEATURE_XGETBV1 (10*32+ 2) /* XGETBV with ECX = 1 */
-#define X86_FEATURE_XSAVES (10*32+ 3) /* XSAVES/XRSTORS */
-
-/* Intel-defined CPU QoS Sub-leaf, CPUID level 0x0000000F:0 (edx), word 11 */
-#define X86_FEATURE_CQM_LLC (11*32+ 1) /* LLC QoS if 1 */
-
-/* Intel-defined CPU QoS Sub-leaf, CPUID level 0x0000000F:1 (edx), word 12 */
-#define X86_FEATURE_CQM_OCCUP_LLC (12*32+ 0) /* LLC occupancy monitoring if 1 */
-
-/* AMD-defined CPU features, CPUID level 0x80000008 (ebx), word 13 */
-#define X86_FEATURE_CLZERO (13*32+0) /* CLZERO instruction */
-
-/* Thermal and Power Management Leaf, CPUID level 0x00000006 (eax), word 14 */
-#define X86_FEATURE_DTHERM (14*32+ 0) /* Digital Thermal Sensor */
-#define X86_FEATURE_IDA (14*32+ 1) /* Intel Dynamic Acceleration */
-#define X86_FEATURE_ARAT (14*32+ 2) /* Always Running APIC Timer */
-#define X86_FEATURE_PLN (14*32+ 4) /* Intel Power Limit Notification */
-#define X86_FEATURE_PTS (14*32+ 6) /* Intel Package Thermal Status */
-#define X86_FEATURE_HWP (14*32+ 7) /* Intel Hardware P-states */
-#define X86_FEATURE_HWP_NOTIFY (14*32+ 8) /* HWP Notification */
-#define X86_FEATURE_HWP_ACT_WINDOW (14*32+ 9) /* HWP Activity Window */
-#define X86_FEATURE_HWP_EPP (14*32+10) /* HWP Energy Perf. Preference */
-#define X86_FEATURE_HWP_PKG_REQ (14*32+11) /* HWP Package Level Request */
-
-/* AMD SVM Feature Identification, CPUID level 0x8000000a (edx), word 15 */
-#define X86_FEATURE_NPT (15*32+ 0) /* Nested Page Table support */
-#define X86_FEATURE_LBRV (15*32+ 1) /* LBR Virtualization support */
-#define X86_FEATURE_SVML (15*32+ 2) /* "svm_lock" SVM locking MSR */
-#define X86_FEATURE_NRIPS (15*32+ 3) /* "nrip_save" SVM next_rip save */
-#define X86_FEATURE_TSCRATEMSR (15*32+ 4) /* "tsc_scale" TSC scaling support */
-#define X86_FEATURE_VMCBCLEAN (15*32+ 5) /* "vmcb_clean" VMCB clean bits support */
-#define X86_FEATURE_FLUSHBYASID (15*32+ 6) /* flush-by-ASID support */
-#define X86_FEATURE_DECODEASSISTS (15*32+ 7) /* Decode Assists support */
-#define X86_FEATURE_PAUSEFILTER (15*32+10) /* filtered pause intercept */
-#define X86_FEATURE_PFTHRESHOLD (15*32+12) /* pause filter threshold */
-
-/*
- * BUG word(s)
- */
-#define X86_BUG(x) (NCAPINTS*32 + (x))
-
-#define X86_BUG_F00F X86_BUG(0) /* Intel F00F */
-#define X86_BUG_FDIV X86_BUG(1) /* FPU FDIV */
-#define X86_BUG_COMA X86_BUG(2) /* Cyrix 6x86 coma */
-#define X86_BUG_AMD_TLB_MMATCH X86_BUG(3) /* "tlb_mmatch" AMD Erratum 383 */
-#define X86_BUG_AMD_APIC_C1E X86_BUG(4) /* "apic_c1e" AMD Erratum 400 */
-#define X86_BUG_11AP X86_BUG(5) /* Bad local APIC aka 11AP */
-#define X86_BUG_FXSAVE_LEAK X86_BUG(6) /* FXSAVE leaks FOP/FIP/FOP */
-#define X86_BUG_CLFLUSH_MONITOR X86_BUG(7) /* AAI65, CLFLUSH required before MONITOR */
-#define X86_BUG_SYSRET_SS_ATTRS X86_BUG(8) /* SYSRET doesn't fix up SS attrs */
-#define X86_BUG_CPU_MELTDOWN X86_BUG(14) /* CPU is affected by meltdown attack and needs kernel page table isolation */
-#define X86_BUG_SPECTRE_V1 X86_BUG(15) /* CPU is affected by Spectre variant 1 attack with conditional branches */
-#define X86_BUG_SPECTRE_V2 X86_BUG(16) /* CPU is affected by Spectre variant 2 attack with indirect branches */
+#include <asm/processor.h>
#if defined(__KERNEL__) && !defined(__ASSEMBLY__)
--- /dev/null
+++ b/arch/x86/include/asm/cpufeatures.h
@@ -0,0 +1,297 @@
+#ifndef _ASM_X86_CPUFEATURES_H
+#define _ASM_X86_CPUFEATURES_H
+
+#ifndef _ASM_X86_REQUIRED_FEATURES_H
+#include <asm/required-features.h>
+#endif
+
+#ifndef _ASM_X86_DISABLED_FEATURES_H
+#include <asm/disabled-features.h>
+#endif
+
+/*
+ * Defines x86 CPU feature bits
+ */
+#define NCAPINTS 16 /* N 32-bit words worth of info */
+#define NBUGINTS 1 /* N 32-bit bug flags */
+
+/*
+ * Note: If the comment begins with a quoted string, that string is used
+ * in /proc/cpuinfo instead of the macro name. If the string is "",
+ * this feature bit is not displayed in /proc/cpuinfo at all.
+ */
+
+/* Intel-defined CPU features, CPUID level 0x00000001 (edx), word 0 */
+#define X86_FEATURE_FPU ( 0*32+ 0) /* Onboard FPU */
+#define X86_FEATURE_VME ( 0*32+ 1) /* Virtual Mode Extensions */
+#define X86_FEATURE_DE ( 0*32+ 2) /* Debugging Extensions */
+#define X86_FEATURE_PSE ( 0*32+ 3) /* Page Size Extensions */
+#define X86_FEATURE_TSC ( 0*32+ 4) /* Time Stamp Counter */
+#define X86_FEATURE_MSR ( 0*32+ 5) /* Model-Specific Registers */
+#define X86_FEATURE_PAE ( 0*32+ 6) /* Physical Address Extensions */
+#define X86_FEATURE_MCE ( 0*32+ 7) /* Machine Check Exception */
+#define X86_FEATURE_CX8 ( 0*32+ 8) /* CMPXCHG8 instruction */
+#define X86_FEATURE_APIC ( 0*32+ 9) /* Onboard APIC */
+#define X86_FEATURE_SEP ( 0*32+11) /* SYSENTER/SYSEXIT */
+#define X86_FEATURE_MTRR ( 0*32+12) /* Memory Type Range Registers */
+#define X86_FEATURE_PGE ( 0*32+13) /* Page Global Enable */
+#define X86_FEATURE_MCA ( 0*32+14) /* Machine Check Architecture */
+#define X86_FEATURE_CMOV ( 0*32+15) /* CMOV instructions */
+ /* (plus FCMOVcc, FCOMI with FPU) */
+#define X86_FEATURE_PAT ( 0*32+16) /* Page Attribute Table */
+#define X86_FEATURE_PSE36 ( 0*32+17) /* 36-bit PSEs */
+#define X86_FEATURE_PN ( 0*32+18) /* Processor serial number */
+#define X86_FEATURE_CLFLUSH ( 0*32+19) /* CLFLUSH instruction */
+#define X86_FEATURE_DS ( 0*32+21) /* "dts" Debug Store */
+#define X86_FEATURE_ACPI ( 0*32+22) /* ACPI via MSR */
+#define X86_FEATURE_MMX ( 0*32+23) /* Multimedia Extensions */
+#define X86_FEATURE_FXSR ( 0*32+24) /* FXSAVE/FXRSTOR, CR4.OSFXSR */
+#define X86_FEATURE_XMM ( 0*32+25) /* "sse" */
+#define X86_FEATURE_XMM2 ( 0*32+26) /* "sse2" */
+#define X86_FEATURE_SELFSNOOP ( 0*32+27) /* "ss" CPU self snoop */
+#define X86_FEATURE_HT ( 0*32+28) /* Hyper-Threading */
+#define X86_FEATURE_ACC ( 0*32+29) /* "tm" Automatic clock control */
+#define X86_FEATURE_IA64 ( 0*32+30) /* IA-64 processor */
+#define X86_FEATURE_PBE ( 0*32+31) /* Pending Break Enable */
+
+/* AMD-defined CPU features, CPUID level 0x80000001, word 1 */
+/* Don't duplicate feature flags which are redundant with Intel! */
+#define X86_FEATURE_SYSCALL ( 1*32+11) /* SYSCALL/SYSRET */
+#define X86_FEATURE_MP ( 1*32+19) /* MP Capable. */
+#define X86_FEATURE_NX ( 1*32+20) /* Execute Disable */
+#define X86_FEATURE_MMXEXT ( 1*32+22) /* AMD MMX extensions */
+#define X86_FEATURE_FXSR_OPT ( 1*32+25) /* FXSAVE/FXRSTOR optimizations */
+#define X86_FEATURE_GBPAGES ( 1*32+26) /* "pdpe1gb" GB pages */
+#define X86_FEATURE_RDTSCP ( 1*32+27) /* RDTSCP */
+#define X86_FEATURE_LM ( 1*32+29) /* Long Mode (x86-64) */
+#define X86_FEATURE_3DNOWEXT ( 1*32+30) /* AMD 3DNow! extensions */
+#define X86_FEATURE_3DNOW ( 1*32+31) /* 3DNow! */
+
+/* Transmeta-defined CPU features, CPUID level 0x80860001, word 2 */
+#define X86_FEATURE_RECOVERY ( 2*32+ 0) /* CPU in recovery mode */
+#define X86_FEATURE_LONGRUN ( 2*32+ 1) /* Longrun power control */
+#define X86_FEATURE_LRTI ( 2*32+ 3) /* LongRun table interface */
+
+/* Other features, Linux-defined mapping, word 3 */
+/* This range is used for feature bits which conflict or are synthesized */
+#define X86_FEATURE_CXMMX ( 3*32+ 0) /* Cyrix MMX extensions */
+#define X86_FEATURE_K6_MTRR ( 3*32+ 1) /* AMD K6 nonstandard MTRRs */
+#define X86_FEATURE_CYRIX_ARR ( 3*32+ 2) /* Cyrix ARRs (= MTRRs) */
+#define X86_FEATURE_CENTAUR_MCR ( 3*32+ 3) /* Centaur MCRs (= MTRRs) */
+/* cpu types for specific tunings: */
+#define X86_FEATURE_K8 ( 3*32+ 4) /* "" Opteron, Athlon64 */
+#define X86_FEATURE_K7 ( 3*32+ 5) /* "" Athlon */
+#define X86_FEATURE_P3 ( 3*32+ 6) /* "" P3 */
+#define X86_FEATURE_P4 ( 3*32+ 7) /* "" P4 */
+#define X86_FEATURE_CONSTANT_TSC ( 3*32+ 8) /* TSC ticks at a constant rate */
+#define X86_FEATURE_UP ( 3*32+ 9) /* smp kernel running on up */
+/* free, was #define X86_FEATURE_FXSAVE_LEAK ( 3*32+10) * "" FXSAVE leaks FOP/FIP/FOP */
+#define X86_FEATURE_ARCH_PERFMON ( 3*32+11) /* Intel Architectural PerfMon */
+#define X86_FEATURE_PEBS ( 3*32+12) /* Precise-Event Based Sampling */
+#define X86_FEATURE_BTS ( 3*32+13) /* Branch Trace Store */
+#define X86_FEATURE_SYSCALL32 ( 3*32+14) /* "" syscall in ia32 userspace */
+#define X86_FEATURE_SYSENTER32 ( 3*32+15) /* "" sysenter in ia32 userspace */
+#define X86_FEATURE_REP_GOOD ( 3*32+16) /* rep microcode works well */
+#define X86_FEATURE_MFENCE_RDTSC ( 3*32+17) /* "" Mfence synchronizes RDTSC */
+#define X86_FEATURE_LFENCE_RDTSC ( 3*32+18) /* "" Lfence synchronizes RDTSC */
+/* free, was #define X86_FEATURE_11AP ( 3*32+19) * "" Bad local APIC aka 11AP */
+#define X86_FEATURE_NOPL ( 3*32+20) /* The NOPL (0F 1F) instructions */
+#define X86_FEATURE_ALWAYS ( 3*32+21) /* "" Always-present feature */
+#define X86_FEATURE_XTOPOLOGY ( 3*32+22) /* cpu topology enum extensions */
+#define X86_FEATURE_TSC_RELIABLE ( 3*32+23) /* TSC is known to be reliable */
+#define X86_FEATURE_NONSTOP_TSC ( 3*32+24) /* TSC does not stop in C states */
+/* free, was #define X86_FEATURE_CLFLUSH_MONITOR ( 3*32+25) * "" clflush reqd with monitor */
+#define X86_FEATURE_EXTD_APICID ( 3*32+26) /* has extended APICID (8 bits) */
+#define X86_FEATURE_AMD_DCM ( 3*32+27) /* multi-node processor */
+#define X86_FEATURE_APERFMPERF ( 3*32+28) /* APERFMPERF */
+/* free, was #define X86_FEATURE_EAGER_FPU ( 3*32+29) * "eagerfpu" Non lazy FPU restore */
+#define X86_FEATURE_NONSTOP_TSC_S3 ( 3*32+30) /* TSC doesn't stop in S3 state */
+
+/* Intel-defined CPU features, CPUID level 0x00000001 (ecx), word 4 */
+#define X86_FEATURE_XMM3 ( 4*32+ 0) /* "pni" SSE-3 */
+#define X86_FEATURE_PCLMULQDQ ( 4*32+ 1) /* PCLMULQDQ instruction */
+#define X86_FEATURE_DTES64 ( 4*32+ 2) /* 64-bit Debug Store */
+#define X86_FEATURE_MWAIT ( 4*32+ 3) /* "monitor" Monitor/Mwait support */
+#define X86_FEATURE_DSCPL ( 4*32+ 4) /* "ds_cpl" CPL Qual. Debug Store */
+#define X86_FEATURE_VMX ( 4*32+ 5) /* Hardware virtualization */
+#define X86_FEATURE_SMX ( 4*32+ 6) /* Safer mode */
+#define X86_FEATURE_EST ( 4*32+ 7) /* Enhanced SpeedStep */
+#define X86_FEATURE_TM2 ( 4*32+ 8) /* Thermal Monitor 2 */
+#define X86_FEATURE_SSSE3 ( 4*32+ 9) /* Supplemental SSE-3 */
+#define X86_FEATURE_CID ( 4*32+10) /* Context ID */
+#define X86_FEATURE_SDBG ( 4*32+11) /* Silicon Debug */
+#define X86_FEATURE_FMA ( 4*32+12) /* Fused multiply-add */
+#define X86_FEATURE_CX16 ( 4*32+13) /* CMPXCHG16B */
+#define X86_FEATURE_XTPR ( 4*32+14) /* Send Task Priority Messages */
+#define X86_FEATURE_PDCM ( 4*32+15) /* Performance Capabilities */
+#define X86_FEATURE_PCID ( 4*32+17) /* Process Context Identifiers */
+#define X86_FEATURE_DCA ( 4*32+18) /* Direct Cache Access */
+#define X86_FEATURE_XMM4_1 ( 4*32+19) /* "sse4_1" SSE-4.1 */
+#define X86_FEATURE_XMM4_2 ( 4*32+20) /* "sse4_2" SSE-4.2 */
+#define X86_FEATURE_X2APIC ( 4*32+21) /* x2APIC */
+#define X86_FEATURE_MOVBE ( 4*32+22) /* MOVBE instruction */
+#define X86_FEATURE_POPCNT ( 4*32+23) /* POPCNT instruction */
+#define X86_FEATURE_TSC_DEADLINE_TIMER ( 4*32+24) /* Tsc deadline timer */
+#define X86_FEATURE_AES ( 4*32+25) /* AES instructions */
+#define X86_FEATURE_XSAVE ( 4*32+26) /* XSAVE/XRSTOR/XSETBV/XGETBV */
+#define X86_FEATURE_OSXSAVE ( 4*32+27) /* "" XSAVE enabled in the OS */
+#define X86_FEATURE_AVX ( 4*32+28) /* Advanced Vector Extensions */
+#define X86_FEATURE_F16C ( 4*32+29) /* 16-bit fp conversions */
+#define X86_FEATURE_RDRAND ( 4*32+30) /* The RDRAND instruction */
+#define X86_FEATURE_HYPERVISOR ( 4*32+31) /* Running on a hypervisor */
+
+/* VIA/Cyrix/Centaur-defined CPU features, CPUID level 0xC0000001, word 5 */
+#define X86_FEATURE_XSTORE ( 5*32+ 2) /* "rng" RNG present (xstore) */
+#define X86_FEATURE_XSTORE_EN ( 5*32+ 3) /* "rng_en" RNG enabled */
+#define X86_FEATURE_XCRYPT ( 5*32+ 6) /* "ace" on-CPU crypto (xcrypt) */
+#define X86_FEATURE_XCRYPT_EN ( 5*32+ 7) /* "ace_en" on-CPU crypto enabled */
+#define X86_FEATURE_ACE2 ( 5*32+ 8) /* Advanced Cryptography Engine v2 */
+#define X86_FEATURE_ACE2_EN ( 5*32+ 9) /* ACE v2 enabled */
+#define X86_FEATURE_PHE ( 5*32+10) /* PadLock Hash Engine */
+#define X86_FEATURE_PHE_EN ( 5*32+11) /* PHE enabled */
+#define X86_FEATURE_PMM ( 5*32+12) /* PadLock Montgomery Multiplier */
+#define X86_FEATURE_PMM_EN ( 5*32+13) /* PMM enabled */
+
+/* More extended AMD flags: CPUID level 0x80000001, ecx, word 6 */
+#define X86_FEATURE_LAHF_LM ( 6*32+ 0) /* LAHF/SAHF in long mode */
+#define X86_FEATURE_CMP_LEGACY ( 6*32+ 1) /* If yes HyperThreading not valid */
+#define X86_FEATURE_SVM ( 6*32+ 2) /* Secure virtual machine */
+#define X86_FEATURE_EXTAPIC ( 6*32+ 3) /* Extended APIC space */
+#define X86_FEATURE_CR8_LEGACY ( 6*32+ 4) /* CR8 in 32-bit mode */
+#define X86_FEATURE_ABM ( 6*32+ 5) /* Advanced bit manipulation */
+#define X86_FEATURE_SSE4A ( 6*32+ 6) /* SSE-4A */
+#define X86_FEATURE_MISALIGNSSE ( 6*32+ 7) /* Misaligned SSE mode */
+#define X86_FEATURE_3DNOWPREFETCH ( 6*32+ 8) /* 3DNow prefetch instructions */
+#define X86_FEATURE_OSVW ( 6*32+ 9) /* OS Visible Workaround */
+#define X86_FEATURE_IBS ( 6*32+10) /* Instruction Based Sampling */
+#define X86_FEATURE_XOP ( 6*32+11) /* extended AVX instructions */
+#define X86_FEATURE_SKINIT ( 6*32+12) /* SKINIT/STGI instructions */
+#define X86_FEATURE_WDT ( 6*32+13) /* Watchdog timer */
+#define X86_FEATURE_LWP ( 6*32+15) /* Light Weight Profiling */
+#define X86_FEATURE_FMA4 ( 6*32+16) /* 4 operands MAC instructions */
+#define X86_FEATURE_TCE ( 6*32+17) /* translation cache extension */
+#define X86_FEATURE_NODEID_MSR ( 6*32+19) /* NodeId MSR */
+#define X86_FEATURE_TBM ( 6*32+21) /* trailing bit manipulations */
+#define X86_FEATURE_TOPOEXT ( 6*32+22) /* topology extensions CPUID leafs */
+#define X86_FEATURE_PERFCTR_CORE ( 6*32+23) /* core performance counter extensions */
+#define X86_FEATURE_PERFCTR_NB ( 6*32+24) /* NB performance counter extensions */
+#define X86_FEATURE_BPEXT (6*32+26) /* data breakpoint extension */
+#define X86_FEATURE_PERFCTR_L2 ( 6*32+28) /* L2 performance counter extensions */
+#define X86_FEATURE_MWAITX ( 6*32+29) /* MWAIT extension (MONITORX/MWAITX) */
+
+/*
+ * Auxiliary flags: Linux defined - For features scattered in various
+ * CPUID levels like 0x6, 0xA etc, word 7.
+ *
+ * Reuse free bits when adding new feature flags!
+ */
+
+#define X86_FEATURE_CPB ( 7*32+ 2) /* AMD Core Performance Boost */
+#define X86_FEATURE_EPB ( 7*32+ 3) /* IA32_ENERGY_PERF_BIAS support */
+#define X86_FEATURE_INVPCID_SINGLE ( 7*32+ 4) /* Effectively INVPCID && CR4.PCIDE=1 */
+
+#define X86_FEATURE_HW_PSTATE ( 7*32+ 8) /* AMD HW-PState */
+#define X86_FEATURE_PROC_FEEDBACK ( 7*32+ 9) /* AMD ProcFeedbackInterface */
+
+#define X86_FEATURE_INTEL_PT ( 7*32+15) /* Intel Processor Trace */
+#define X86_FEATURE_RSB_CTXSW ( 7*32+19) /* Fill RSB on context switches */
+
+#define X86_FEATURE_RETPOLINE ( 7*32+29) /* Generic Retpoline mitigation for Spectre variant 2 */
+#define X86_FEATURE_RETPOLINE_AMD ( 7*32+30) /* AMD Retpoline mitigation for Spectre variant 2 */
+/* Because the ALTERNATIVE scheme is for members of the X86_FEATURE club... */
+#define X86_FEATURE_KAISER ( 7*32+31) /* CONFIG_PAGE_TABLE_ISOLATION w/o nokaiser */
+
+/* Virtualization flags: Linux defined, word 8 */
+#define X86_FEATURE_TPR_SHADOW ( 8*32+ 0) /* Intel TPR Shadow */
+#define X86_FEATURE_VNMI ( 8*32+ 1) /* Intel Virtual NMI */
+#define X86_FEATURE_FLEXPRIORITY ( 8*32+ 2) /* Intel FlexPriority */
+#define X86_FEATURE_EPT ( 8*32+ 3) /* Intel Extended Page Table */
+#define X86_FEATURE_VPID ( 8*32+ 4) /* Intel Virtual Processor ID */
+
+#define X86_FEATURE_VMMCALL ( 8*32+15) /* Prefer vmmcall to vmcall */
+#define X86_FEATURE_XENPV ( 8*32+16) /* "" Xen paravirtual guest */
+
+
+/* Intel-defined CPU features, CPUID level 0x00000007:0 (ebx), word 9 */
+#define X86_FEATURE_FSGSBASE ( 9*32+ 0) /* {RD/WR}{FS/GS}BASE instructions*/
+#define X86_FEATURE_TSC_ADJUST ( 9*32+ 1) /* TSC adjustment MSR 0x3b */
+#define X86_FEATURE_BMI1 ( 9*32+ 3) /* 1st group bit manipulation extensions */
+#define X86_FEATURE_HLE ( 9*32+ 4) /* Hardware Lock Elision */
+#define X86_FEATURE_AVX2 ( 9*32+ 5) /* AVX2 instructions */
+#define X86_FEATURE_SMEP ( 9*32+ 7) /* Supervisor Mode Execution Protection */
+#define X86_FEATURE_BMI2 ( 9*32+ 8) /* 2nd group bit manipulation extensions */
+#define X86_FEATURE_ERMS ( 9*32+ 9) /* Enhanced REP MOVSB/STOSB */
+#define X86_FEATURE_INVPCID ( 9*32+10) /* Invalidate Processor Context ID */
+#define X86_FEATURE_RTM ( 9*32+11) /* Restricted Transactional Memory */
+#define X86_FEATURE_CQM ( 9*32+12) /* Cache QoS Monitoring */
+#define X86_FEATURE_MPX ( 9*32+14) /* Memory Protection Extension */
+#define X86_FEATURE_AVX512F ( 9*32+16) /* AVX-512 Foundation */
+#define X86_FEATURE_RDSEED ( 9*32+18) /* The RDSEED instruction */
+#define X86_FEATURE_ADX ( 9*32+19) /* The ADCX and ADOX instructions */
+#define X86_FEATURE_SMAP ( 9*32+20) /* Supervisor Mode Access Prevention */
+#define X86_FEATURE_PCOMMIT ( 9*32+22) /* PCOMMIT instruction */
+#define X86_FEATURE_CLFLUSHOPT ( 9*32+23) /* CLFLUSHOPT instruction */
+#define X86_FEATURE_CLWB ( 9*32+24) /* CLWB instruction */
+#define X86_FEATURE_AVX512PF ( 9*32+26) /* AVX-512 Prefetch */
+#define X86_FEATURE_AVX512ER ( 9*32+27) /* AVX-512 Exponential and Reciprocal */
+#define X86_FEATURE_AVX512CD ( 9*32+28) /* AVX-512 Conflict Detection */
+#define X86_FEATURE_SHA_NI ( 9*32+29) /* SHA1/SHA256 Instruction Extensions */
+
+/* Extended state features, CPUID level 0x0000000d:1 (eax), word 10 */
+#define X86_FEATURE_XSAVEOPT (10*32+ 0) /* XSAVEOPT */
+#define X86_FEATURE_XSAVEC (10*32+ 1) /* XSAVEC */
+#define X86_FEATURE_XGETBV1 (10*32+ 2) /* XGETBV with ECX = 1 */
+#define X86_FEATURE_XSAVES (10*32+ 3) /* XSAVES/XRSTORS */
+
+/* Intel-defined CPU QoS Sub-leaf, CPUID level 0x0000000F:0 (edx), word 11 */
+#define X86_FEATURE_CQM_LLC (11*32+ 1) /* LLC QoS if 1 */
+
+/* Intel-defined CPU QoS Sub-leaf, CPUID level 0x0000000F:1 (edx), word 12 */
+#define X86_FEATURE_CQM_OCCUP_LLC (12*32+ 0) /* LLC occupancy monitoring if 1 */
+
+/* AMD-defined CPU features, CPUID level 0x80000008 (ebx), word 13 */
+#define X86_FEATURE_CLZERO (13*32+0) /* CLZERO instruction */
+
+/* Thermal and Power Management Leaf, CPUID level 0x00000006 (eax), word 14 */
+#define X86_FEATURE_DTHERM (14*32+ 0) /* Digital Thermal Sensor */
+#define X86_FEATURE_IDA (14*32+ 1) /* Intel Dynamic Acceleration */
+#define X86_FEATURE_ARAT (14*32+ 2) /* Always Running APIC Timer */
+#define X86_FEATURE_PLN (14*32+ 4) /* Intel Power Limit Notification */
+#define X86_FEATURE_PTS (14*32+ 6) /* Intel Package Thermal Status */
+#define X86_FEATURE_HWP (14*32+ 7) /* Intel Hardware P-states */
+#define X86_FEATURE_HWP_NOTIFY (14*32+ 8) /* HWP Notification */
+#define X86_FEATURE_HWP_ACT_WINDOW (14*32+ 9) /* HWP Activity Window */
+#define X86_FEATURE_HWP_EPP (14*32+10) /* HWP Energy Perf. Preference */
+#define X86_FEATURE_HWP_PKG_REQ (14*32+11) /* HWP Package Level Request */
+
+/* AMD SVM Feature Identification, CPUID level 0x8000000a (edx), word 15 */
+#define X86_FEATURE_NPT (15*32+ 0) /* Nested Page Table support */
+#define X86_FEATURE_LBRV (15*32+ 1) /* LBR Virtualization support */
+#define X86_FEATURE_SVML (15*32+ 2) /* "svm_lock" SVM locking MSR */
+#define X86_FEATURE_NRIPS (15*32+ 3) /* "nrip_save" SVM next_rip save */
+#define X86_FEATURE_TSCRATEMSR (15*32+ 4) /* "tsc_scale" TSC scaling support */
+#define X86_FEATURE_VMCBCLEAN (15*32+ 5) /* "vmcb_clean" VMCB clean bits support */
+#define X86_FEATURE_FLUSHBYASID (15*32+ 6) /* flush-by-ASID support */
+#define X86_FEATURE_DECODEASSISTS (15*32+ 7) /* Decode Assists support */
+#define X86_FEATURE_PAUSEFILTER (15*32+10) /* filtered pause intercept */
+#define X86_FEATURE_PFTHRESHOLD (15*32+12) /* pause filter threshold */
+
+/*
+ * BUG word(s)
+ */
+#define X86_BUG(x) (NCAPINTS*32 + (x))
+
+#define X86_BUG_F00F X86_BUG(0) /* Intel F00F */
+#define X86_BUG_FDIV X86_BUG(1) /* FPU FDIV */
+#define X86_BUG_COMA X86_BUG(2) /* Cyrix 6x86 coma */
+#define X86_BUG_AMD_TLB_MMATCH X86_BUG(3) /* "tlb_mmatch" AMD Erratum 383 */
+#define X86_BUG_AMD_APIC_C1E X86_BUG(4) /* "apic_c1e" AMD Erratum 400 */
+#define X86_BUG_11AP X86_BUG(5) /* Bad local APIC aka 11AP */
+#define X86_BUG_FXSAVE_LEAK X86_BUG(6) /* FXSAVE leaks FOP/FIP/FOP */
+#define X86_BUG_CLFLUSH_MONITOR X86_BUG(7) /* AAI65, CLFLUSH required before MONITOR */
+#define X86_BUG_SYSRET_SS_ATTRS X86_BUG(8) /* SYSRET doesn't fix up SS attrs */
+#define X86_BUG_CPU_MELTDOWN X86_BUG(14) /* CPU is affected by meltdown attack and needs kernel page table isolation */
+#define X86_BUG_SPECTRE_V1 X86_BUG(15) /* CPU is affected by Spectre variant 1 attack with conditional branches */
+#define X86_BUG_SPECTRE_V2 X86_BUG(16) /* CPU is affected by Spectre variant 2 attack with indirect branches */
+
+#endif /* _ASM_X86_CPUFEATURES_H */
--- a/arch/x86/include/asm/fpu/internal.h
+++ b/arch/x86/include/asm/fpu/internal.h
@@ -17,6 +17,7 @@
#include <asm/user.h>
#include <asm/fpu/api.h>
#include <asm/fpu/xstate.h>
+#include <asm/cpufeature.h>
/*
* High level FPU state handling functions:
--- a/arch/x86/include/asm/irq_work.h
+++ b/arch/x86/include/asm/irq_work.h
@@ -1,7 +1,7 @@
#ifndef _ASM_IRQ_WORK_H
#define _ASM_IRQ_WORK_H
-#include <asm/processor.h>
+#include <asm/cpufeature.h>
static inline bool arch_irq_work_has_interrupt(void)
{
--- a/arch/x86/include/asm/mwait.h
+++ b/arch/x86/include/asm/mwait.h
@@ -3,6 +3,8 @@
#include <linux/sched.h>
+#include <asm/cpufeature.h>
+
#define MWAIT_SUBSTATE_MASK 0xf
#define MWAIT_CSTATE_MASK 0xf
#define MWAIT_SUBSTATE_SIZE 4
--- a/arch/x86/include/asm/nospec-branch.h
+++ b/arch/x86/include/asm/nospec-branch.h
@@ -5,7 +5,7 @@
#include <asm/alternative.h>
#include <asm/alternative-asm.h>
-#include <asm/cpufeature.h>
+#include <asm/cpufeatures.h>
/*
* Fill the CPU return stack buffer.
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -13,7 +13,7 @@ struct vm86;
#include <asm/types.h>
#include <uapi/asm/sigcontext.h>
#include <asm/current.h>
-#include <asm/cpufeature.h>
+#include <asm/cpufeatures.h>
#include <asm/page.h>
#include <asm/pgtable_types.h>
#include <asm/percpu.h>
@@ -24,7 +24,6 @@ struct vm86;
#include <asm/fpu/types.h>
#include <linux/personality.h>
-#include <linux/cpumask.h>
#include <linux/cache.h>
#include <linux/threads.h>
#include <linux/math64.h>
--- a/arch/x86/include/asm/smap.h
+++ b/arch/x86/include/asm/smap.h
@@ -15,7 +15,7 @@
#include <linux/stringify.h>
#include <asm/nops.h>
-#include <asm/cpufeature.h>
+#include <asm/cpufeatures.h>
/* "Raw" instruction opcodes */
#define __ASM_CLAC .byte 0x0f,0x01,0xca
--- a/arch/x86/include/asm/smp.h
+++ b/arch/x86/include/asm/smp.h
@@ -16,7 +16,6 @@
#endif
#include <asm/thread_info.h>
#include <asm/cpumask.h>
-#include <asm/cpufeature.h>
extern int smp_num_siblings;
extern unsigned int num_processors;
--- a/arch/x86/include/asm/thread_info.h
+++ b/arch/x86/include/asm/thread_info.h
@@ -49,7 +49,7 @@
*/
#ifndef __ASSEMBLY__
struct task_struct;
-#include <asm/processor.h>
+#include <asm/cpufeature.h>
#include <linux/atomic.h>
struct thread_info {
--- a/arch/x86/include/asm/tlbflush.h
+++ b/arch/x86/include/asm/tlbflush.h
@@ -5,6 +5,7 @@
#include <linux/sched.h>
#include <asm/processor.h>
+#include <asm/cpufeature.h>
#include <asm/special_insns.h>
#include <asm/smp.h>
--- a/arch/x86/include/asm/uaccess_64.h
+++ b/arch/x86/include/asm/uaccess_64.h
@@ -8,7 +8,7 @@
#include <linux/errno.h>
#include <linux/lockdep.h>
#include <asm/alternative.h>
-#include <asm/cpufeature.h>
+#include <asm/cpufeatures.h>
#include <asm/page.h>
/*
--- a/arch/x86/kernel/cpu/Makefile
+++ b/arch/x86/kernel/cpu/Makefile
@@ -62,7 +62,7 @@ ifdef CONFIG_X86_FEATURE_NAMES
quiet_cmd_mkcapflags = MKCAP $@
cmd_mkcapflags = $(CONFIG_SHELL) $(srctree)/$(src)/mkcapflags.sh $< $@
-cpufeature = $(src)/../../include/asm/cpufeature.h
+cpufeature = $(src)/../../include/asm/cpufeatures.h
targets += capflags.c
$(obj)/capflags.c: $(cpufeature) $(src)/mkcapflags.sh FORCE
--- a/arch/x86/kernel/cpu/centaur.c
+++ b/arch/x86/kernel/cpu/centaur.c
@@ -1,7 +1,7 @@
#include <linux/bitops.h>
#include <linux/kernel.h>
-#include <asm/processor.h>
+#include <asm/cpufeature.h>
#include <asm/e820.h>
#include <asm/mtrr.h>
#include <asm/msr.h>
--- a/arch/x86/kernel/cpu/cyrix.c
+++ b/arch/x86/kernel/cpu/cyrix.c
@@ -8,6 +8,7 @@
#include <linux/timer.h>
#include <asm/pci-direct.h>
#include <asm/tsc.h>
+#include <asm/cpufeature.h>
#include "cpu.h"
--- a/arch/x86/kernel/cpu/intel.c
+++ b/arch/x86/kernel/cpu/intel.c
@@ -8,7 +8,7 @@
#include <linux/module.h>
#include <linux/uaccess.h>
-#include <asm/processor.h>
+#include <asm/cpufeature.h>
#include <asm/pgtable.h>
#include <asm/msr.h>
#include <asm/bugs.h>
--- a/arch/x86/kernel/cpu/intel_cacheinfo.c
+++ b/arch/x86/kernel/cpu/intel_cacheinfo.c
@@ -14,7 +14,7 @@
#include <linux/sysfs.h>
#include <linux/pci.h>
-#include <asm/processor.h>
+#include <asm/cpufeature.h>
#include <asm/amd_nb.h>
#include <asm/smp.h>
--- a/arch/x86/kernel/cpu/match.c
+++ b/arch/x86/kernel/cpu/match.c
@@ -1,5 +1,5 @@
#include <asm/cpu_device_id.h>
-#include <asm/processor.h>
+#include <asm/cpufeature.h>
#include <linux/cpu.h>
#include <linux/module.h>
#include <linux/slab.h>
--- a/arch/x86/kernel/cpu/mkcapflags.sh
+++ b/arch/x86/kernel/cpu/mkcapflags.sh
@@ -1,6 +1,6 @@
#!/bin/sh
#
-# Generate the x86_cap/bug_flags[] arrays from include/asm/cpufeature.h
+# Generate the x86_cap/bug_flags[] arrays from include/asm/cpufeatures.h
#
IN=$1
@@ -49,8 +49,8 @@ dump_array()
trap 'rm "$OUT"' EXIT
(
- echo "#ifndef _ASM_X86_CPUFEATURE_H"
- echo "#include <asm/cpufeature.h>"
+ echo "#ifndef _ASM_X86_CPUFEATURES_H"
+ echo "#include <asm/cpufeatures.h>"
echo "#endif"
echo ""
--- a/arch/x86/kernel/cpu/mtrr/main.c
+++ b/arch/x86/kernel/cpu/mtrr/main.c
@@ -47,7 +47,7 @@
#include <linux/smp.h>
#include <linux/syscore_ops.h>
-#include <asm/processor.h>
+#include <asm/cpufeature.h>
#include <asm/e820.h>
#include <asm/mtrr.h>
#include <asm/msr.h>
--- a/arch/x86/kernel/cpu/transmeta.c
+++ b/arch/x86/kernel/cpu/transmeta.c
@@ -1,6 +1,6 @@
#include <linux/kernel.h>
#include <linux/mm.h>
-#include <asm/processor.h>
+#include <asm/cpufeature.h>
#include <asm/msr.h>
#include "cpu.h"
--- a/arch/x86/kernel/e820.c
+++ b/arch/x86/kernel/e820.c
@@ -24,6 +24,7 @@
#include <asm/e820.h>
#include <asm/proto.h>
#include <asm/setup.h>
+#include <asm/cpufeature.h>
/*
* The e820 map is the map that gets modified e.g. with command line parameters
--- a/arch/x86/kernel/head_32.S
+++ b/arch/x86/kernel/head_32.S
@@ -19,7 +19,7 @@
#include <asm/setup.h>
#include <asm/processor-flags.h>
#include <asm/msr-index.h>
-#include <asm/cpufeature.h>
+#include <asm/cpufeatures.h>
#include <asm/percpu.h>
#include <asm/nops.h>
#include <asm/bootparam.h>
--- a/arch/x86/kernel/hpet.c
+++ b/arch/x86/kernel/hpet.c
@@ -12,6 +12,7 @@
#include <linux/pm.h>
#include <linux/io.h>
+#include <asm/cpufeature.h>
#include <asm/irqdomain.h>
#include <asm/fixmap.h>
#include <asm/hpet.h>
--- a/arch/x86/kernel/msr.c
+++ b/arch/x86/kernel/msr.c
@@ -40,7 +40,7 @@
#include <linux/uaccess.h>
#include <linux/gfp.h>
-#include <asm/processor.h>
+#include <asm/cpufeature.h>
#include <asm/msr.h>
static struct class *msr_class;
--- a/arch/x86/kernel/verify_cpu.S
+++ b/arch/x86/kernel/verify_cpu.S
@@ -30,7 +30,7 @@
* appropriately. Either display a message or halt.
*/
-#include <asm/cpufeature.h>
+#include <asm/cpufeatures.h>
#include <asm/msr-index.h>
verify_cpu:
--- a/arch/x86/lib/clear_page_64.S
+++ b/arch/x86/lib/clear_page_64.S
@@ -1,5 +1,5 @@
#include <linux/linkage.h>
-#include <asm/cpufeature.h>
+#include <asm/cpufeatures.h>
#include <asm/alternative-asm.h>
/*
--- a/arch/x86/lib/copy_page_64.S
+++ b/arch/x86/lib/copy_page_64.S
@@ -1,7 +1,7 @@
/* Written 2003 by Andi Kleen, based on a kernel by Evandro Menezes */
#include <linux/linkage.h>
-#include <asm/cpufeature.h>
+#include <asm/cpufeatures.h>
#include <asm/alternative-asm.h>
/*
--- a/arch/x86/lib/copy_user_64.S
+++ b/arch/x86/lib/copy_user_64.S
@@ -10,7 +10,7 @@
#include <asm/current.h>
#include <asm/asm-offsets.h>
#include <asm/thread_info.h>
-#include <asm/cpufeature.h>
+#include <asm/cpufeatures.h>
#include <asm/alternative-asm.h>
#include <asm/asm.h>
#include <asm/smap.h>
--- a/arch/x86/lib/memcpy_64.S
+++ b/arch/x86/lib/memcpy_64.S
@@ -1,7 +1,7 @@
/* Copyright 2002 Andi Kleen */
#include <linux/linkage.h>
-#include <asm/cpufeature.h>
+#include <asm/cpufeatures.h>
#include <asm/alternative-asm.h>
/*
--- a/arch/x86/lib/memmove_64.S
+++ b/arch/x86/lib/memmove_64.S
@@ -6,7 +6,7 @@
* - Copyright 2011 Fenghua Yu <fenghua.yu@intel.com>
*/
#include <linux/linkage.h>
-#include <asm/cpufeature.h>
+#include <asm/cpufeatures.h>
#include <asm/alternative-asm.h>
#undef memmove
--- a/arch/x86/lib/memset_64.S
+++ b/arch/x86/lib/memset_64.S
@@ -1,7 +1,7 @@
/* Copyright 2002 Andi Kleen, SuSE Labs */
#include <linux/linkage.h>
-#include <asm/cpufeature.h>
+#include <asm/cpufeatures.h>
#include <asm/alternative-asm.h>
.weak memset
--- a/arch/x86/lib/retpoline.S
+++ b/arch/x86/lib/retpoline.S
@@ -3,7 +3,7 @@
#include <linux/stringify.h>
#include <linux/linkage.h>
#include <asm/dwarf2.h>
-#include <asm/cpufeature.h>
+#include <asm/cpufeatures.h>
#include <asm/alternative-asm.h>
#include <asm-generic/export.h>
#include <asm/nospec-branch.h>
--- a/arch/x86/mm/setup_nx.c
+++ b/arch/x86/mm/setup_nx.c
@@ -4,6 +4,7 @@
#include <asm/pgtable.h>
#include <asm/proto.h>
+#include <asm/cpufeature.h>
static int disable_nx;
--- a/arch/x86/oprofile/op_model_amd.c
+++ b/arch/x86/oprofile/op_model_amd.c
@@ -24,7 +24,6 @@
#include <asm/nmi.h>
#include <asm/apic.h>
#include <asm/processor.h>
-#include <asm/cpufeature.h>
#include "op_x86_model.h"
#include "op_counter.h"
--- a/arch/x86/um/asm/barrier.h
+++ b/arch/x86/um/asm/barrier.h
@@ -3,7 +3,7 @@
#include <asm/asm.h>
#include <asm/segment.h>
-#include <asm/cpufeature.h>
+#include <asm/cpufeatures.h>
#include <asm/cmpxchg.h>
#include <asm/nops.h>
--- a/lib/atomic64_test.c
+++ b/lib/atomic64_test.c
@@ -17,7 +17,7 @@
#include <linux/atomic.h>
#ifdef CONFIG_X86
-#include <asm/processor.h> /* for boot_cpu_has below */
+#include <asm/cpufeature.h> /* for boot_cpu_has below */
#endif
#define TEST(bit, op, c_op, val) \
^ permalink raw reply [flat|nested] 53+ messages in thread* [PATCH 4.4 23/43] x86/cpufeature: Replace the old static_cpu_has() with safe variant
2018-07-16 7:36 [PATCH 4.4 00/43] 4.4.141-stable review Greg Kroah-Hartman
` (21 preceding siblings ...)
2018-07-16 7:36 ` [PATCH 4.4 22/43] x86/cpufeature: Carve out X86_FEATURE_* Greg Kroah-Hartman
@ 2018-07-16 7:36 ` Greg Kroah-Hartman
2018-07-16 7:36 ` [PATCH 4.4 24/43] x86/cpufeature: Get rid of the non-asm goto variant Greg Kroah-Hartman
` (22 subsequent siblings)
45 siblings, 0 replies; 53+ messages in thread
From: Greg Kroah-Hartman @ 2018-07-16 7:36 UTC (permalink / raw)
To: linux-kernel
Cc: Greg Kroah-Hartman, stable, Borislav Petkov, Andy Lutomirski,
Borislav Petkov, Brian Gerst, Denys Vlasenko, H. Peter Anvin,
Linus Torvalds, Peter Zijlstra, Thomas Gleixner, Ingo Molnar,
Srivatsa S. Bhat, Matt Helsley (VMware),
Alexey Makhalov, Bo Gan
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Borislav Petkov <bp@suse.de>
commit bc696ca05f5a8927329ec276a892341e006b00ba upstream
So the old one didn't work properly before alternatives had run.
And it was supposed to provide an optimized JMP because the
assumption was that the offset it is jumping to is within a
signed byte and thus a two-byte JMP.
So I did an x86_64 allyesconfig build and dumped all possible
sites where static_cpu_has() was used. The optimization amounted
to all in all 12(!) places where static_cpu_has() had generated
a 2-byte JMP. Which has saved us a whopping 36 bytes!
This clearly is not worth the trouble so we can remove it. The
only place where the optimization might count - in __switch_to()
- we will handle differently. But that's not subject of this
patch.
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1453842730-28463-6-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Srivatsa S. Bhat <srivatsa@csail.mit.edu>
Reviewed-by: Matt Helsley (VMware) <matt.helsley@gmail.com>
Reviewed-by: Alexey Makhalov <amakhalov@vmware.com>
Reviewed-by: Bo Gan <ganb@vmware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/x86/Kconfig.debug | 10 ---
arch/x86/include/asm/cpufeature.h | 100 ++---------------------------------
arch/x86/include/asm/fpu/internal.h | 12 ++--
arch/x86/kernel/apic/apic_numachip.c | 4 -
arch/x86/kernel/cpu/common.c | 12 ----
arch/x86/kernel/vm86_32.c | 2
fs/btrfs/disk-io.c | 2
7 files changed, 19 insertions(+), 123 deletions(-)
--- a/arch/x86/Kconfig.debug
+++ b/arch/x86/Kconfig.debug
@@ -367,16 +367,6 @@ config DEBUG_IMR_SELFTEST
If unsure say N here.
-config X86_DEBUG_STATIC_CPU_HAS
- bool "Debug alternatives"
- depends on DEBUG_KERNEL
- ---help---
- This option causes additional code to be generated which
- fails if static_cpu_has() is used before alternatives have
- run.
-
- If unsure, say N.
-
config X86_DEBUG_FPU
bool "Debug the x86 FPU code"
depends on DEBUG_KERNEL
--- a/arch/x86/include/asm/cpufeature.h
+++ b/arch/x86/include/asm/cpufeature.h
@@ -127,103 +127,19 @@ extern const char * const x86_bug_flags[
#define cpu_has_osxsave boot_cpu_has(X86_FEATURE_OSXSAVE)
#define cpu_has_hypervisor boot_cpu_has(X86_FEATURE_HYPERVISOR)
/*
- * Do not add any more of those clumsy macros - use static_cpu_has_safe() for
+ * Do not add any more of those clumsy macros - use static_cpu_has() for
* fast paths and boot_cpu_has() otherwise!
*/
#if __GNUC__ >= 4 && defined(CONFIG_X86_FAST_FEATURE_TESTS)
-extern void warn_pre_alternatives(void);
-extern bool __static_cpu_has_safe(u16 bit);
+extern bool __static_cpu_has(u16 bit);
/*
* Static testing of CPU features. Used the same as boot_cpu_has().
* These are only valid after alternatives have run, but will statically
* patch the target code for additional performance.
*/
-static __always_inline __pure bool __static_cpu_has(u16 bit)
-{
-#ifdef CC_HAVE_ASM_GOTO
-
-#ifdef CONFIG_X86_DEBUG_STATIC_CPU_HAS
-
- /*
- * Catch too early usage of this before alternatives
- * have run.
- */
- asm_volatile_goto("1: jmp %l[t_warn]\n"
- "2:\n"
- ".section .altinstructions,\"a\"\n"
- " .long 1b - .\n"
- " .long 0\n" /* no replacement */
- " .word %P0\n" /* 1: do replace */
- " .byte 2b - 1b\n" /* source len */
- " .byte 0\n" /* replacement len */
- " .byte 0\n" /* pad len */
- ".previous\n"
- /* skipping size check since replacement size = 0 */
- : : "i" (X86_FEATURE_ALWAYS) : : t_warn);
-
-#endif
-
- asm_volatile_goto("1: jmp %l[t_no]\n"
- "2:\n"
- ".section .altinstructions,\"a\"\n"
- " .long 1b - .\n"
- " .long 0\n" /* no replacement */
- " .word %P0\n" /* feature bit */
- " .byte 2b - 1b\n" /* source len */
- " .byte 0\n" /* replacement len */
- " .byte 0\n" /* pad len */
- ".previous\n"
- /* skipping size check since replacement size = 0 */
- : : "i" (bit) : : t_no);
- return true;
- t_no:
- return false;
-
-#ifdef CONFIG_X86_DEBUG_STATIC_CPU_HAS
- t_warn:
- warn_pre_alternatives();
- return false;
-#endif
-
-#else /* CC_HAVE_ASM_GOTO */
-
- u8 flag;
- /* Open-coded due to __stringify() in ALTERNATIVE() */
- asm volatile("1: movb $0,%0\n"
- "2:\n"
- ".section .altinstructions,\"a\"\n"
- " .long 1b - .\n"
- " .long 3f - .\n"
- " .word %P1\n" /* feature bit */
- " .byte 2b - 1b\n" /* source len */
- " .byte 4f - 3f\n" /* replacement len */
- " .byte 0\n" /* pad len */
- ".previous\n"
- ".section .discard,\"aw\",@progbits\n"
- " .byte 0xff + (4f-3f) - (2b-1b)\n" /* size check */
- ".previous\n"
- ".section .altinstr_replacement,\"ax\"\n"
- "3: movb $1,%0\n"
- "4:\n"
- ".previous\n"
- : "=qm" (flag) : "i" (bit));
- return flag;
-
-#endif /* CC_HAVE_ASM_GOTO */
-}
-
-#define static_cpu_has(bit) \
-( \
- __builtin_constant_p(boot_cpu_has(bit)) ? \
- boot_cpu_has(bit) : \
- __builtin_constant_p(bit) ? \
- __static_cpu_has(bit) : \
- boot_cpu_has(bit) \
-)
-
-static __always_inline __pure bool _static_cpu_has_safe(u16 bit)
+static __always_inline __pure bool _static_cpu_has(u16 bit)
{
#ifdef CC_HAVE_ASM_GOTO
asm_volatile_goto("1: jmp %l[t_dynamic]\n"
@@ -257,7 +173,7 @@ static __always_inline __pure bool _stat
t_no:
return false;
t_dynamic:
- return __static_cpu_has_safe(bit);
+ return __static_cpu_has(bit);
#else
u8 flag;
/* Open-coded due to __stringify() in ALTERNATIVE() */
@@ -295,22 +211,21 @@ static __always_inline __pure bool _stat
".previous\n"
: "=qm" (flag)
: "i" (bit), "i" (X86_FEATURE_ALWAYS));
- return (flag == 2 ? __static_cpu_has_safe(bit) : flag);
+ return (flag == 2 ? __static_cpu_has(bit) : flag);
#endif /* CC_HAVE_ASM_GOTO */
}
-#define static_cpu_has_safe(bit) \
+#define static_cpu_has(bit) \
( \
__builtin_constant_p(boot_cpu_has(bit)) ? \
boot_cpu_has(bit) : \
- _static_cpu_has_safe(bit) \
+ _static_cpu_has(bit) \
)
#else
/*
* gcc 3.x is too stupid to do the static test; fall back to dynamic.
*/
#define static_cpu_has(bit) boot_cpu_has(bit)
-#define static_cpu_has_safe(bit) boot_cpu_has(bit)
#endif
#define cpu_has_bug(c, bit) cpu_has(c, (bit))
@@ -318,7 +233,6 @@ static __always_inline __pure bool _stat
#define clear_cpu_bug(c, bit) clear_cpu_cap(c, (bit))
#define static_cpu_has_bug(bit) static_cpu_has((bit))
-#define static_cpu_has_bug_safe(bit) static_cpu_has_safe((bit))
#define boot_cpu_has_bug(bit) cpu_has_bug(&boot_cpu_data, (bit))
#define MAX_CPU_FEATURES (NCAPINTS * 32)
--- a/arch/x86/include/asm/fpu/internal.h
+++ b/arch/x86/include/asm/fpu/internal.h
@@ -64,17 +64,17 @@ static __always_inline __pure bool use_e
static __always_inline __pure bool use_xsaveopt(void)
{
- return static_cpu_has_safe(X86_FEATURE_XSAVEOPT);
+ return static_cpu_has(X86_FEATURE_XSAVEOPT);
}
static __always_inline __pure bool use_xsave(void)
{
- return static_cpu_has_safe(X86_FEATURE_XSAVE);
+ return static_cpu_has(X86_FEATURE_XSAVE);
}
static __always_inline __pure bool use_fxsr(void)
{
- return static_cpu_has_safe(X86_FEATURE_FXSR);
+ return static_cpu_has(X86_FEATURE_FXSR);
}
/*
@@ -301,7 +301,7 @@ static inline void copy_xregs_to_kernel_
WARN_ON(system_state != SYSTEM_BOOTING);
- if (static_cpu_has_safe(X86_FEATURE_XSAVES))
+ if (static_cpu_has(X86_FEATURE_XSAVES))
XSTATE_OP(XSAVES, xstate, lmask, hmask, err);
else
XSTATE_OP(XSAVE, xstate, lmask, hmask, err);
@@ -323,7 +323,7 @@ static inline void copy_kernel_to_xregs_
WARN_ON(system_state != SYSTEM_BOOTING);
- if (static_cpu_has_safe(X86_FEATURE_XSAVES))
+ if (static_cpu_has(X86_FEATURE_XSAVES))
XSTATE_OP(XRSTORS, xstate, lmask, hmask, err);
else
XSTATE_OP(XRSTOR, xstate, lmask, hmask, err);
@@ -461,7 +461,7 @@ static inline void copy_kernel_to_fpregs
* pending. Clear the x87 state here by setting it to fixed values.
* "m" is a random variable that should be in L1.
*/
- if (unlikely(static_cpu_has_bug_safe(X86_BUG_FXSAVE_LEAK))) {
+ if (unlikely(static_cpu_has_bug(X86_BUG_FXSAVE_LEAK))) {
asm volatile(
"fnclex\n\t"
"emms\n\t"
--- a/arch/x86/kernel/apic/apic_numachip.c
+++ b/arch/x86/kernel/apic/apic_numachip.c
@@ -30,7 +30,7 @@ static unsigned int numachip1_get_apic_i
unsigned long value;
unsigned int id = (x >> 24) & 0xff;
- if (static_cpu_has_safe(X86_FEATURE_NODEID_MSR)) {
+ if (static_cpu_has(X86_FEATURE_NODEID_MSR)) {
rdmsrl(MSR_FAM10H_NODE_ID, value);
id |= (value << 2) & 0xff00;
}
@@ -178,7 +178,7 @@ static void fixup_cpu_id(struct cpuinfo_
this_cpu_write(cpu_llc_id, node);
/* Account for nodes per socket in multi-core-module processors */
- if (static_cpu_has_safe(X86_FEATURE_NODEID_MSR)) {
+ if (static_cpu_has(X86_FEATURE_NODEID_MSR)) {
rdmsrl(MSR_FAM10H_NODE_ID, val);
nodes = ((val >> 3) & 7) + 1;
}
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -1576,19 +1576,11 @@ void cpu_init(void)
}
#endif
-#ifdef CONFIG_X86_DEBUG_STATIC_CPU_HAS
-void warn_pre_alternatives(void)
-{
- WARN(1, "You're using static_cpu_has before alternatives have run!\n");
-}
-EXPORT_SYMBOL_GPL(warn_pre_alternatives);
-#endif
-
-inline bool __static_cpu_has_safe(u16 bit)
+inline bool __static_cpu_has(u16 bit)
{
return boot_cpu_has(bit);
}
-EXPORT_SYMBOL_GPL(__static_cpu_has_safe);
+EXPORT_SYMBOL_GPL(__static_cpu_has);
static void bsp_resume(void)
{
--- a/arch/x86/kernel/vm86_32.c
+++ b/arch/x86/kernel/vm86_32.c
@@ -358,7 +358,7 @@ static long do_sys_vm86(struct vm86plus_
/* make room for real-mode segments */
tsk->thread.sp0 += 16;
- if (static_cpu_has_safe(X86_FEATURE_SEP))
+ if (static_cpu_has(X86_FEATURE_SEP))
tsk->thread.sysenter_cs = 0;
load_sp0(tss, &tsk->thread);
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -923,7 +923,7 @@ static int check_async_write(struct inod
if (bio_flags & EXTENT_BIO_TREE_LOG)
return 0;
#ifdef CONFIG_X86
- if (static_cpu_has_safe(X86_FEATURE_XMM4_2))
+ if (static_cpu_has(X86_FEATURE_XMM4_2))
return 0;
#endif
return 1;
^ permalink raw reply [flat|nested] 53+ messages in thread* [PATCH 4.4 24/43] x86/cpufeature: Get rid of the non-asm goto variant
2018-07-16 7:36 [PATCH 4.4 00/43] 4.4.141-stable review Greg Kroah-Hartman
` (22 preceding siblings ...)
2018-07-16 7:36 ` [PATCH 4.4 23/43] x86/cpufeature: Replace the old static_cpu_has() with safe variant Greg Kroah-Hartman
@ 2018-07-16 7:36 ` Greg Kroah-Hartman
2018-07-16 7:36 ` [PATCH 4.4 25/43] x86/alternatives: Add an auxilary section Greg Kroah-Hartman
` (21 subsequent siblings)
45 siblings, 0 replies; 53+ messages in thread
From: Greg Kroah-Hartman @ 2018-07-16 7:36 UTC (permalink / raw)
To: linux-kernel
Cc: Greg Kroah-Hartman, stable, H. Peter Anvin, Borislav Petkov,
Andy Lutomirski, Borislav Petkov, Brian Gerst, Denys Vlasenko,
Linus Torvalds, Peter Zijlstra, Thomas Gleixner, Ingo Molnar,
Srivatsa S. Bhat, Matt Helsley (VMware),
Alexey Makhalov, Bo Gan
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Borislav Petkov <bp@alien8.de>
commit a362bf9f5e7dd659b96d01382da7b855f4e5a7a1 upstream
I can simply quote hpa from the mail:
"Get rid of the non-asm goto variant and just fall back to
dynamic if asm goto is unavailable. It doesn't make any sense,
really, if it is supposed to be safe, and by now the asm
goto-capable gcc is in more wide use. (Originally the gcc 3.x
fallback to pure dynamic didn't exist, either.)"
Booy, am I lazy.
Cleanup the whole CC_HAVE_ASM_GOTO ifdeffery too, while at it.
Suggested-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20160127084325.GB30712@pd.tnic
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Srivatsa S. Bhat <srivatsa@csail.mit.edu>
Reviewed-by: Matt Helsley (VMware) <matt.helsley@gmail.com>
Reviewed-by: Alexey Makhalov <amakhalov@vmware.com>
Reviewed-by: Bo Gan <ganb@vmware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/x86/include/asm/cpufeature.h | 49 +++-----------------------------------
1 file changed, 5 insertions(+), 44 deletions(-)
--- a/arch/x86/include/asm/cpufeature.h
+++ b/arch/x86/include/asm/cpufeature.h
@@ -131,17 +131,16 @@ extern const char * const x86_bug_flags[
* fast paths and boot_cpu_has() otherwise!
*/
-#if __GNUC__ >= 4 && defined(CONFIG_X86_FAST_FEATURE_TESTS)
+#if defined(CC_HAVE_ASM_GOTO) && defined(CONFIG_X86_FAST_FEATURE_TESTS)
extern bool __static_cpu_has(u16 bit);
/*
* Static testing of CPU features. Used the same as boot_cpu_has().
- * These are only valid after alternatives have run, but will statically
- * patch the target code for additional performance.
+ * These will statically patch the target code for additional
+ * performance.
*/
static __always_inline __pure bool _static_cpu_has(u16 bit)
{
-#ifdef CC_HAVE_ASM_GOTO
asm_volatile_goto("1: jmp %l[t_dynamic]\n"
"2:\n"
".skip -(((5f-4f) - (2b-1b)) > 0) * "
@@ -174,45 +173,6 @@ static __always_inline __pure bool _stat
return false;
t_dynamic:
return __static_cpu_has(bit);
-#else
- u8 flag;
- /* Open-coded due to __stringify() in ALTERNATIVE() */
- asm volatile("1: movb $2,%0\n"
- "2:\n"
- ".section .altinstructions,\"a\"\n"
- " .long 1b - .\n" /* src offset */
- " .long 3f - .\n" /* repl offset */
- " .word %P2\n" /* always replace */
- " .byte 2b - 1b\n" /* source len */
- " .byte 4f - 3f\n" /* replacement len */
- " .byte 0\n" /* pad len */
- ".previous\n"
- ".section .discard,\"aw\",@progbits\n"
- " .byte 0xff + (4f-3f) - (2b-1b)\n" /* size check */
- ".previous\n"
- ".section .altinstr_replacement,\"ax\"\n"
- "3: movb $0,%0\n"
- "4:\n"
- ".previous\n"
- ".section .altinstructions,\"a\"\n"
- " .long 1b - .\n" /* src offset */
- " .long 5f - .\n" /* repl offset */
- " .word %P1\n" /* feature bit */
- " .byte 4b - 3b\n" /* src len */
- " .byte 6f - 5f\n" /* repl len */
- " .byte 0\n" /* pad len */
- ".previous\n"
- ".section .discard,\"aw\",@progbits\n"
- " .byte 0xff + (6f-5f) - (4b-3b)\n" /* size check */
- ".previous\n"
- ".section .altinstr_replacement,\"ax\"\n"
- "5: movb $1,%0\n"
- "6:\n"
- ".previous\n"
- : "=qm" (flag)
- : "i" (bit), "i" (X86_FEATURE_ALWAYS));
- return (flag == 2 ? __static_cpu_has(bit) : flag);
-#endif /* CC_HAVE_ASM_GOTO */
}
#define static_cpu_has(bit) \
@@ -223,7 +183,8 @@ static __always_inline __pure bool _stat
)
#else
/*
- * gcc 3.x is too stupid to do the static test; fall back to dynamic.
+ * Fall back to dynamic for gcc versions which don't support asm goto. Should be
+ * a minority now anyway.
*/
#define static_cpu_has(bit) boot_cpu_has(bit)
#endif
^ permalink raw reply [flat|nested] 53+ messages in thread* [PATCH 4.4 25/43] x86/alternatives: Add an auxilary section
2018-07-16 7:36 [PATCH 4.4 00/43] 4.4.141-stable review Greg Kroah-Hartman
` (23 preceding siblings ...)
2018-07-16 7:36 ` [PATCH 4.4 24/43] x86/cpufeature: Get rid of the non-asm goto variant Greg Kroah-Hartman
@ 2018-07-16 7:36 ` Greg Kroah-Hartman
2018-07-16 7:36 ` [PATCH 4.4 26/43] x86/alternatives: Discard dynamic check after init Greg Kroah-Hartman
` (20 subsequent siblings)
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From: Greg Kroah-Hartman @ 2018-07-16 7:36 UTC (permalink / raw)
To: linux-kernel
Cc: Greg Kroah-Hartman, stable, Borislav Petkov, Andy Lutomirski,
Borislav Petkov, Brian Gerst, Denys Vlasenko, H. Peter Anvin,
Linus Torvalds, Peter Zijlstra, Thomas Gleixner, Ingo Molnar,
Srivatsa S. Bhat, Matt Helsley (VMware),
Alexey Makhalov, Bo Gan
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Borislav Petkov <bp@suse.de>
commit 337e4cc84021212a87b04b77b65cccc49304909e upstream
Add .altinstr_aux for additional instructions which will be used
before and/or during patching. All stuff which needs more
sophisticated patching should go there. See next patch.
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1453842730-28463-8-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Srivatsa S. Bhat <srivatsa@csail.mit.edu>
Reviewed-by: Matt Helsley (VMware) <matt.helsley@gmail.com>
Reviewed-by: Alexey Makhalov <amakhalov@vmware.com>
Reviewed-by: Bo Gan <ganb@vmware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/x86/kernel/vmlinux.lds.S | 11 +++++++++++
1 file changed, 11 insertions(+)
--- a/arch/x86/kernel/vmlinux.lds.S
+++ b/arch/x86/kernel/vmlinux.lds.S
@@ -202,6 +202,17 @@ SECTIONS
:init
#endif
+ /*
+ * Section for code used exclusively before alternatives are run. All
+ * references to such code must be patched out by alternatives, normally
+ * by using X86_FEATURE_ALWAYS CPU feature bit.
+ *
+ * See static_cpu_has() for an example.
+ */
+ .altinstr_aux : AT(ADDR(.altinstr_aux) - LOAD_OFFSET) {
+ *(.altinstr_aux)
+ }
+
INIT_DATA_SECTION(16)
.x86_cpu_dev.init : AT(ADDR(.x86_cpu_dev.init) - LOAD_OFFSET) {
^ permalink raw reply [flat|nested] 53+ messages in thread* [PATCH 4.4 26/43] x86/alternatives: Discard dynamic check after init
2018-07-16 7:36 [PATCH 4.4 00/43] 4.4.141-stable review Greg Kroah-Hartman
` (24 preceding siblings ...)
2018-07-16 7:36 ` [PATCH 4.4 25/43] x86/alternatives: Add an auxilary section Greg Kroah-Hartman
@ 2018-07-16 7:36 ` Greg Kroah-Hartman
2018-07-16 7:36 ` [PATCH 4.4 27/43] x86/vdso: Use static_cpu_has() Greg Kroah-Hartman
` (19 subsequent siblings)
45 siblings, 0 replies; 53+ messages in thread
From: Greg Kroah-Hartman @ 2018-07-16 7:36 UTC (permalink / raw)
To: linux-kernel
Cc: Greg Kroah-Hartman, stable, Brian Gerst, Borislav Petkov,
Andrew Morton, Andy Lutomirski, Andy Lutomirski, Boris Ostrovsky,
Borislav Petkov, Dave Young, Denys Vlasenko, H. Peter Anvin,
Kristen Carlson Accardi, Laura Abbott, Linus Torvalds,
Peter Zijlstra (Intel),
Prarit Bhargava, Ross Zwisler, Thomas Gleixner, Ingo Molnar,
Srivatsa S. Bhat, Matt Helsley (VMware),
Alexey Makhalov, Bo Gan
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Brian Gerst <brgerst@gmail.com>
commit 2476f2fa20568bd5d9e09cd35bcd73e99a6f4cc6 upstream
Move the code to do the dynamic check to the altinstr_aux
section so that it is discarded after alternatives have run and
a static branch has been chosen.
This way we're changing the dynamic branch from C code to
assembly, which makes it *substantially* smaller while avoiding
a completely unnecessary call to an out of line function.
Signed-off-by: Brian Gerst <brgerst@gmail.com>
[ Changed it to do TESTB, as hpa suggested. ]
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Young <dyoung@redhat.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Kristen Carlson Accardi <kristen@linux.intel.com>
Cc: Laura Abbott <labbott@fedoraproject.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1452972124-7380-1-git-send-email-brgerst@gmail.com
Link: http://lkml.kernel.org/r/20160127084525.GC30712@pd.tnic
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Srivatsa S. Bhat <srivatsa@csail.mit.edu>
Reviewed-by: Matt Helsley (VMware) <matt.helsley@gmail.com>
Reviewed-by: Alexey Makhalov <amakhalov@vmware.com>
Reviewed-by: Bo Gan <ganb@vmware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/x86/include/asm/cpufeature.h | 19 ++++++++++++-------
arch/x86/kernel/cpu/common.c | 6 ------
2 files changed, 12 insertions(+), 13 deletions(-)
--- a/arch/x86/include/asm/cpufeature.h
+++ b/arch/x86/include/asm/cpufeature.h
@@ -132,8 +132,6 @@ extern const char * const x86_bug_flags[
*/
#if defined(CC_HAVE_ASM_GOTO) && defined(CONFIG_X86_FAST_FEATURE_TESTS)
-extern bool __static_cpu_has(u16 bit);
-
/*
* Static testing of CPU features. Used the same as boot_cpu_has().
* These will statically patch the target code for additional
@@ -141,7 +139,7 @@ extern bool __static_cpu_has(u16 bit);
*/
static __always_inline __pure bool _static_cpu_has(u16 bit)
{
- asm_volatile_goto("1: jmp %l[t_dynamic]\n"
+ asm_volatile_goto("1: jmp 6f\n"
"2:\n"
".skip -(((5f-4f) - (2b-1b)) > 0) * "
"((5f-4f) - (2b-1b)),0x90\n"
@@ -166,13 +164,20 @@ static __always_inline __pure bool _stat
" .byte 0\n" /* repl len */
" .byte 0\n" /* pad len */
".previous\n"
- : : "i" (bit), "i" (X86_FEATURE_ALWAYS)
- : : t_dynamic, t_no);
+ ".section .altinstr_aux,\"ax\"\n"
+ "6:\n"
+ " testb %[bitnum],%[cap_byte]\n"
+ " jnz %l[t_yes]\n"
+ " jmp %l[t_no]\n"
+ ".previous\n"
+ : : "i" (bit), "i" (X86_FEATURE_ALWAYS),
+ [bitnum] "i" (1 << (bit & 7)),
+ [cap_byte] "m" (((const char *)boot_cpu_data.x86_capability)[bit >> 3])
+ : : t_yes, t_no);
+ t_yes:
return true;
t_no:
return false;
- t_dynamic:
- return __static_cpu_has(bit);
}
#define static_cpu_has(bit) \
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -1576,12 +1576,6 @@ void cpu_init(void)
}
#endif
-inline bool __static_cpu_has(u16 bit)
-{
- return boot_cpu_has(bit);
-}
-EXPORT_SYMBOL_GPL(__static_cpu_has);
-
static void bsp_resume(void)
{
if (this_cpu->c_bsp_resume)
^ permalink raw reply [flat|nested] 53+ messages in thread* [PATCH 4.4 27/43] x86/vdso: Use static_cpu_has()
2018-07-16 7:36 [PATCH 4.4 00/43] 4.4.141-stable review Greg Kroah-Hartman
` (25 preceding siblings ...)
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@ 2018-07-16 7:36 ` Greg Kroah-Hartman
2018-07-16 7:36 ` [PATCH 4.4 28/43] x86/boot: Simplify kernel load address alignment check Greg Kroah-Hartman
` (18 subsequent siblings)
45 siblings, 0 replies; 53+ messages in thread
From: Greg Kroah-Hartman @ 2018-07-16 7:36 UTC (permalink / raw)
To: linux-kernel
Cc: Greg Kroah-Hartman, stable, Borislav Petkov, Andy Lutomirski,
Borislav Petkov, Brian Gerst, Denys Vlasenko, H. Peter Anvin,
Linus Torvalds, Peter Zijlstra, Thomas Gleixner, Ingo Molnar,
Srivatsa S. Bhat, Matt Helsley (VMware),
Alexey Makhalov, Bo Gan
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Borislav Petkov <bp@suse.de>
commit 8c725306993198f845038dc9e45a1267099867a6 upstream
... and simplify and speed up a tad.
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1453842730-28463-10-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Srivatsa S. Bhat <srivatsa@csail.mit.edu>
Reviewed-by: Matt Helsley (VMware) <matt.helsley@gmail.com>
Reviewed-by: Alexey Makhalov <amakhalov@vmware.com>
Reviewed-by: Bo Gan <ganb@vmware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/x86/entry/vdso/vma.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/x86/entry/vdso/vma.c
+++ b/arch/x86/entry/vdso/vma.c
@@ -255,7 +255,7 @@ static void vgetcpu_cpu_init(void *arg)
#ifdef CONFIG_NUMA
node = cpu_to_node(cpu);
#endif
- if (cpu_has(&cpu_data(cpu), X86_FEATURE_RDTSCP))
+ if (static_cpu_has(X86_FEATURE_RDTSCP))
write_rdtscp_aux((node << 12) | cpu);
/*
^ permalink raw reply [flat|nested] 53+ messages in thread* [PATCH 4.4 28/43] x86/boot: Simplify kernel load address alignment check
2018-07-16 7:36 [PATCH 4.4 00/43] 4.4.141-stable review Greg Kroah-Hartman
` (26 preceding siblings ...)
2018-07-16 7:36 ` [PATCH 4.4 27/43] x86/vdso: Use static_cpu_has() Greg Kroah-Hartman
@ 2018-07-16 7:36 ` Greg Kroah-Hartman
2018-07-16 7:36 ` [PATCH 4.4 29/43] x86/cpufeature: Speed up cpu_feature_enabled() Greg Kroah-Hartman
` (17 subsequent siblings)
45 siblings, 0 replies; 53+ messages in thread
From: Greg Kroah-Hartman @ 2018-07-16 7:36 UTC (permalink / raw)
To: linux-kernel
Cc: Greg Kroah-Hartman, stable, Brian Gerst, Alexander Kuleshov,
Borislav Petkov, Alexander Popov, Andrey Ryabinin,
Andy Lutomirski, Andy Lutomirski, Borislav Petkov,
Denys Vlasenko, H. Peter Anvin, Linus Torvalds, Peter Zijlstra,
Thomas Gleixner, Ingo Molnar, Srivatsa S. Bhat,
Matt Helsley (VMware),
Alexey Makhalov, Bo Gan
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Alexander Kuleshov <kuleshovmail@gmail.com>
commit a4733143085d6c782ac1e6c85778655b6bac1d4e upstream
We are using %rax as temporary register to check the kernel
address alignment. We don't really have to since the TEST
instruction does not clobber the destination operand.
Suggested-by: Brian Gerst <brgerst@gmail.com>
Signed-off-by: Alexander Kuleshov <kuleshovmail@gmail.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Alexander Popov <alpopov@ptsecurity.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1453531828-19291-1-git-send-email-kuleshovmail@gmail.com
Link: http://lkml.kernel.org/r/1453842730-28463-11-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Srivatsa S. Bhat <srivatsa@csail.mit.edu>
Reviewed-by: Matt Helsley (VMware) <matt.helsley@gmail.com>
Reviewed-by: Alexey Makhalov <amakhalov@vmware.com>
Reviewed-by: Bo Gan <ganb@vmware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/x86/kernel/head_64.S | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
--- a/arch/x86/kernel/head_64.S
+++ b/arch/x86/kernel/head_64.S
@@ -76,9 +76,7 @@ startup_64:
subq $_text - __START_KERNEL_map, %rbp
/* Is the address not 2M aligned? */
- movq %rbp, %rax
- andl $~PMD_PAGE_MASK, %eax
- testl %eax, %eax
+ testl $~PMD_PAGE_MASK, %ebp
jnz bad_address
/*
^ permalink raw reply [flat|nested] 53+ messages in thread* [PATCH 4.4 29/43] x86/cpufeature: Speed up cpu_feature_enabled()
2018-07-16 7:36 [PATCH 4.4 00/43] 4.4.141-stable review Greg Kroah-Hartman
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2018-07-16 7:36 ` [PATCH 4.4 28/43] x86/boot: Simplify kernel load address alignment check Greg Kroah-Hartman
@ 2018-07-16 7:36 ` Greg Kroah-Hartman
2018-07-16 7:36 ` [PATCH 4.4 30/43] x86/cpufeature, x86/mm/pkeys: Add protection keys related CPUID definitions Greg Kroah-Hartman
` (16 subsequent siblings)
45 siblings, 0 replies; 53+ messages in thread
From: Greg Kroah-Hartman @ 2018-07-16 7:36 UTC (permalink / raw)
To: linux-kernel
Cc: Greg Kroah-Hartman, stable, Borislav Petkov, Joerg Roedel,
Linus Torvalds, Peter Zijlstra, Thomas Gleixner, Ingo Molnar,
Srivatsa S. Bhat, Matt Helsley (VMware),
Alexey Makhalov, Bo Gan
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Borislav Petkov <bp@suse.de>
commit f2cc8e0791c70833758101d9756609a08dd601ec upstream
When GCC cannot do constant folding for this macro, it falls back to
cpu_has(). But static_cpu_has() is optimal and it works at all times
now. So use it and speedup the fallback case.
Before we had this:
mov 0x99d674(%rip),%rdx # ffffffff81b0d9f4 <boot_cpu_data+0x34>
shr $0x2e,%rdx
and $0x1,%edx
jne ffffffff811704e9 <do_munmap+0x3f9>
After alternatives patching, it turns into:
jmp 0xffffffff81170390
nopl (%rax)
...
callq ffffffff81056e00 <mpx_notify_unmap>
ffffffff81170390: mov 0x170(%r12),%rdi
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1455578358-28347-1-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Srivatsa S. Bhat <srivatsa@csail.mit.edu>
Reviewed-by: Matt Helsley (VMware) <matt.helsley@gmail.com>
Reviewed-by: Alexey Makhalov <amakhalov@vmware.com>
Reviewed-by: Bo Gan <ganb@vmware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/x86/include/asm/cpufeature.h | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
--- a/arch/x86/include/asm/cpufeature.h
+++ b/arch/x86/include/asm/cpufeature.h
@@ -88,8 +88,7 @@ extern const char * const x86_bug_flags[
* is not relevant.
*/
#define cpu_feature_enabled(bit) \
- (__builtin_constant_p(bit) && DISABLED_MASK_BIT_SET(bit) ? 0 : \
- cpu_has(&boot_cpu_data, bit))
+ (__builtin_constant_p(bit) && DISABLED_MASK_BIT_SET(bit) ? 0 : static_cpu_has(bit))
#define boot_cpu_has(bit) cpu_has(&boot_cpu_data, bit)
^ permalink raw reply [flat|nested] 53+ messages in thread* [PATCH 4.4 30/43] x86/cpufeature, x86/mm/pkeys: Add protection keys related CPUID definitions
2018-07-16 7:36 [PATCH 4.4 00/43] 4.4.141-stable review Greg Kroah-Hartman
` (28 preceding siblings ...)
2018-07-16 7:36 ` [PATCH 4.4 29/43] x86/cpufeature: Speed up cpu_feature_enabled() Greg Kroah-Hartman
@ 2018-07-16 7:36 ` Greg Kroah-Hartman
2018-07-16 7:36 ` [PATCH 4.4 31/43] x86/mm/pkeys: Fix mismerge of protection keys CPUID bits Greg Kroah-Hartman
` (15 subsequent siblings)
45 siblings, 0 replies; 53+ messages in thread
From: Greg Kroah-Hartman @ 2018-07-16 7:36 UTC (permalink / raw)
To: linux-kernel
Cc: Greg Kroah-Hartman, stable, Dave Hansen, Thomas Gleixner,
Andrew Morton, Andy Lutomirski, Borislav Petkov, Brian Gerst,
Dave Hansen, Denys Vlasenko, H. Peter Anvin, Linus Torvalds,
Peter Zijlstra, Rik van Riel, linux-mm, Ingo Molnar,
Srivatsa S. Bhat, Matt Helsley (VMware),
Alexey Makhalov, Bo Gan
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Dave Hansen <dave.hansen@linux.intel.com>
commit dfb4a70f20c5b3880da56ee4c9484bdb4e8f1e65 upstream
There are two CPUID bits for protection keys. One is for whether
the CPU contains the feature, and the other will appear set once
the OS enables protection keys. Specifically:
Bit 04: OSPKE. If 1, OS has set CR4.PKE to enable
Protection keys (and the RDPKRU/WRPKRU instructions)
This is because userspace can not see CR4 contents, but it can
see CPUID contents.
X86_FEATURE_PKU is referred to as "PKU" in the hardware documentation:
CPUID.(EAX=07H,ECX=0H):ECX.PKU [bit 3]
X86_FEATURE_OSPKE is "OSPKU":
CPUID.(EAX=07H,ECX=0H):ECX.OSPKE [bit 4]
These are the first CPU features which need to look at the
ECX word in CPUID leaf 0x7, so this patch also includes
fetching that word in to the cpuinfo->x86_capability[] array.
Add it to the disabled-features mask when its config option is
off. Even though we are not using it here, we also extend the
REQUIRED_MASK_BIT_SET() macro to keep it mirroring the
DISABLED_MASK_BIT_SET() version.
This means that in almost all code, you should use:
cpu_has(c, X86_FEATURE_PKU)
and *not* the CONFIG option.
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dave Hansen <dave@sr71.net>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: linux-mm@kvack.org
Link: http://lkml.kernel.org/r/20160212210201.7714C250@viggo.jf.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Srivatsa S. Bhat <srivatsa@csail.mit.edu>
Reviewed-by: Matt Helsley (VMware) <matt.helsley@gmail.com>
Reviewed-by: Alexey Makhalov <amakhalov@vmware.com>
Reviewed-by: Bo Gan <ganb@vmware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/x86/include/asm/cpufeature.h | 59 ++++++++++++++++++++-----------
arch/x86/include/asm/cpufeatures.h | 2 -
arch/x86/include/asm/disabled-features.h | 15 +++++++
arch/x86/include/asm/required-features.h | 7 +++
arch/x86/kernel/cpu/common.c | 1
5 files changed, 63 insertions(+), 21 deletions(-)
--- a/arch/x86/include/asm/cpufeature.h
+++ b/arch/x86/include/asm/cpufeature.h
@@ -26,6 +26,7 @@ enum cpuid_leafs
CPUID_8000_0008_EBX,
CPUID_6_EAX,
CPUID_8000_000A_EDX,
+ CPUID_7_ECX,
};
#ifdef CONFIG_X86_FEATURE_NAMES
@@ -48,28 +49,42 @@ extern const char * const x86_bug_flags[
test_bit(bit, (unsigned long *)((c)->x86_capability))
#define REQUIRED_MASK_BIT_SET(bit) \
- ( (((bit)>>5)==0 && (1UL<<((bit)&31) & REQUIRED_MASK0)) || \
- (((bit)>>5)==1 && (1UL<<((bit)&31) & REQUIRED_MASK1)) || \
- (((bit)>>5)==2 && (1UL<<((bit)&31) & REQUIRED_MASK2)) || \
- (((bit)>>5)==3 && (1UL<<((bit)&31) & REQUIRED_MASK3)) || \
- (((bit)>>5)==4 && (1UL<<((bit)&31) & REQUIRED_MASK4)) || \
- (((bit)>>5)==5 && (1UL<<((bit)&31) & REQUIRED_MASK5)) || \
- (((bit)>>5)==6 && (1UL<<((bit)&31) & REQUIRED_MASK6)) || \
- (((bit)>>5)==7 && (1UL<<((bit)&31) & REQUIRED_MASK7)) || \
- (((bit)>>5)==8 && (1UL<<((bit)&31) & REQUIRED_MASK8)) || \
- (((bit)>>5)==9 && (1UL<<((bit)&31) & REQUIRED_MASK9)) )
+ ( (((bit)>>5)==0 && (1UL<<((bit)&31) & REQUIRED_MASK0 )) || \
+ (((bit)>>5)==1 && (1UL<<((bit)&31) & REQUIRED_MASK1 )) || \
+ (((bit)>>5)==2 && (1UL<<((bit)&31) & REQUIRED_MASK2 )) || \
+ (((bit)>>5)==3 && (1UL<<((bit)&31) & REQUIRED_MASK3 )) || \
+ (((bit)>>5)==4 && (1UL<<((bit)&31) & REQUIRED_MASK4 )) || \
+ (((bit)>>5)==5 && (1UL<<((bit)&31) & REQUIRED_MASK5 )) || \
+ (((bit)>>5)==6 && (1UL<<((bit)&31) & REQUIRED_MASK6 )) || \
+ (((bit)>>5)==7 && (1UL<<((bit)&31) & REQUIRED_MASK7 )) || \
+ (((bit)>>5)==8 && (1UL<<((bit)&31) & REQUIRED_MASK8 )) || \
+ (((bit)>>5)==9 && (1UL<<((bit)&31) & REQUIRED_MASK9 )) || \
+ (((bit)>>5)==10 && (1UL<<((bit)&31) & REQUIRED_MASK10)) || \
+ (((bit)>>5)==11 && (1UL<<((bit)&31) & REQUIRED_MASK11)) || \
+ (((bit)>>5)==12 && (1UL<<((bit)&31) & REQUIRED_MASK12)) || \
+ (((bit)>>5)==13 && (1UL<<((bit)&31) & REQUIRED_MASK13)) || \
+ (((bit)>>5)==13 && (1UL<<((bit)&31) & REQUIRED_MASK14)) || \
+ (((bit)>>5)==13 && (1UL<<((bit)&31) & REQUIRED_MASK15)) || \
+ (((bit)>>5)==14 && (1UL<<((bit)&31) & REQUIRED_MASK16)) )
#define DISABLED_MASK_BIT_SET(bit) \
- ( (((bit)>>5)==0 && (1UL<<((bit)&31) & DISABLED_MASK0)) || \
- (((bit)>>5)==1 && (1UL<<((bit)&31) & DISABLED_MASK1)) || \
- (((bit)>>5)==2 && (1UL<<((bit)&31) & DISABLED_MASK2)) || \
- (((bit)>>5)==3 && (1UL<<((bit)&31) & DISABLED_MASK3)) || \
- (((bit)>>5)==4 && (1UL<<((bit)&31) & DISABLED_MASK4)) || \
- (((bit)>>5)==5 && (1UL<<((bit)&31) & DISABLED_MASK5)) || \
- (((bit)>>5)==6 && (1UL<<((bit)&31) & DISABLED_MASK6)) || \
- (((bit)>>5)==7 && (1UL<<((bit)&31) & DISABLED_MASK7)) || \
- (((bit)>>5)==8 && (1UL<<((bit)&31) & DISABLED_MASK8)) || \
- (((bit)>>5)==9 && (1UL<<((bit)&31) & DISABLED_MASK9)) )
+ ( (((bit)>>5)==0 && (1UL<<((bit)&31) & DISABLED_MASK0 )) || \
+ (((bit)>>5)==1 && (1UL<<((bit)&31) & DISABLED_MASK1 )) || \
+ (((bit)>>5)==2 && (1UL<<((bit)&31) & DISABLED_MASK2 )) || \
+ (((bit)>>5)==3 && (1UL<<((bit)&31) & DISABLED_MASK3 )) || \
+ (((bit)>>5)==4 && (1UL<<((bit)&31) & DISABLED_MASK4 )) || \
+ (((bit)>>5)==5 && (1UL<<((bit)&31) & DISABLED_MASK5 )) || \
+ (((bit)>>5)==6 && (1UL<<((bit)&31) & DISABLED_MASK6 )) || \
+ (((bit)>>5)==7 && (1UL<<((bit)&31) & DISABLED_MASK7 )) || \
+ (((bit)>>5)==8 && (1UL<<((bit)&31) & DISABLED_MASK8 )) || \
+ (((bit)>>5)==9 && (1UL<<((bit)&31) & DISABLED_MASK9 )) || \
+ (((bit)>>5)==10 && (1UL<<((bit)&31) & DISABLED_MASK10)) || \
+ (((bit)>>5)==11 && (1UL<<((bit)&31) & DISABLED_MASK11)) || \
+ (((bit)>>5)==12 && (1UL<<((bit)&31) & DISABLED_MASK12)) || \
+ (((bit)>>5)==13 && (1UL<<((bit)&31) & DISABLED_MASK13)) || \
+ (((bit)>>5)==13 && (1UL<<((bit)&31) & DISABLED_MASK14)) || \
+ (((bit)>>5)==13 && (1UL<<((bit)&31) & DISABLED_MASK15)) || \
+ (((bit)>>5)==14 && (1UL<<((bit)&31) & DISABLED_MASK16)) )
#define cpu_has(c, bit) \
(__builtin_constant_p(bit) && REQUIRED_MASK_BIT_SET(bit) ? 1 : \
@@ -79,6 +94,10 @@ extern const char * const x86_bug_flags[
(__builtin_constant_p(bit) && REQUIRED_MASK_BIT_SET(bit) ? 1 : \
x86_this_cpu_test_bit(bit, (unsigned long *)&cpu_info.x86_capability))
+/* Intel-defined CPU features, CPUID level 0x00000007:0 (ecx), word 16 */
+#define X86_FEATURE_PKU (16*32+ 3) /* Protection Keys for Userspace */
+#define X86_FEATURE_OSPKE (16*32+ 4) /* OS Protection Keys Enable */
+
/*
* This macro is for detection of features which need kernel
* infrastructure to be used. It may *not* directly test the CPU
--- a/arch/x86/include/asm/cpufeatures.h
+++ b/arch/x86/include/asm/cpufeatures.h
@@ -12,7 +12,7 @@
/*
* Defines x86 CPU feature bits
*/
-#define NCAPINTS 16 /* N 32-bit words worth of info */
+#define NCAPINTS 17 /* N 32-bit words worth of info */
#define NBUGINTS 1 /* N 32-bit bug flags */
/*
--- a/arch/x86/include/asm/disabled-features.h
+++ b/arch/x86/include/asm/disabled-features.h
@@ -30,6 +30,14 @@
# define DISABLE_PCID (1<<(X86_FEATURE_PCID & 31))
#endif /* CONFIG_X86_64 */
+#ifdef CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS
+# define DISABLE_PKU (1<<(X86_FEATURE_PKU))
+# define DISABLE_OSPKE (1<<(X86_FEATURE_OSPKE))
+#else
+# define DISABLE_PKU 0
+# define DISABLE_OSPKE 0
+#endif /* CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS */
+
/*
* Make sure to add features to the correct mask
*/
@@ -43,5 +51,12 @@
#define DISABLED_MASK7 0
#define DISABLED_MASK8 0
#define DISABLED_MASK9 (DISABLE_MPX)
+#define DISABLED_MASK10 0
+#define DISABLED_MASK11 0
+#define DISABLED_MASK12 0
+#define DISABLED_MASK13 0
+#define DISABLED_MASK14 0
+#define DISABLED_MASK15 0
+#define DISABLED_MASK16 (DISABLE_PKU|DISABLE_OSPKE)
#endif /* _ASM_X86_DISABLED_FEATURES_H */
--- a/arch/x86/include/asm/required-features.h
+++ b/arch/x86/include/asm/required-features.h
@@ -92,5 +92,12 @@
#define REQUIRED_MASK7 0
#define REQUIRED_MASK8 0
#define REQUIRED_MASK9 0
+#define REQUIRED_MASK10 0
+#define REQUIRED_MASK11 0
+#define REQUIRED_MASK12 0
+#define REQUIRED_MASK13 0
+#define REQUIRED_MASK14 0
+#define REQUIRED_MASK15 0
+#define REQUIRED_MASK16 0
#endif /* _ASM_X86_REQUIRED_FEATURES_H */
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -693,6 +693,7 @@ void get_cpu_cap(struct cpuinfo_x86 *c)
c->x86_capability[CPUID_7_0_EBX] = ebx;
c->x86_capability[CPUID_6_EAX] = cpuid_eax(0x00000006);
+ c->x86_capability[CPUID_7_ECX] = ecx;
}
/* Extended state features: level 0x0000000d */
^ permalink raw reply [flat|nested] 53+ messages in thread* [PATCH 4.4 31/43] x86/mm/pkeys: Fix mismerge of protection keys CPUID bits
2018-07-16 7:36 [PATCH 4.4 00/43] 4.4.141-stable review Greg Kroah-Hartman
` (29 preceding siblings ...)
2018-07-16 7:36 ` [PATCH 4.4 30/43] x86/cpufeature, x86/mm/pkeys: Add protection keys related CPUID definitions Greg Kroah-Hartman
@ 2018-07-16 7:36 ` Greg Kroah-Hartman
2018-07-16 7:36 ` [PATCH 4.4 32/43] x86/cpu: Add detection of AMD RAS Capabilities Greg Kroah-Hartman
` (14 subsequent siblings)
45 siblings, 0 replies; 53+ messages in thread
From: Greg Kroah-Hartman @ 2018-07-16 7:36 UTC (permalink / raw)
To: linux-kernel
Cc: Greg Kroah-Hartman, stable, Kirill A. Shutemov, Dave Hansen,
Borislav Petkov, Andy Lutomirski, Dave Hansen, Linus Torvalds,
Peter Zijlstra, Thomas Gleixner, Ingo Molnar, Srivatsa S. Bhat,
Matt Helsley (VMware),
Alexey Makhalov, Bo Gan
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Dave Hansen <dave.hansen@linux.intel.com>
commit 0d47638f80a02b15869f1fe1fc09e5bf996750fd upstream
Kirill Shutemov pointed this out to me.
The tip tree currently has commit:
dfb4a70f2 [x86/cpufeature, x86/mm/pkeys: Add protection keys related CPUID definitions]
whioch added support for two new CPUID bits: X86_FEATURE_PKU and
X86_FEATURE_OSPKE. But, those bits were mis-merged and put in
cpufeature.h instead of cpufeatures.h.
This didn't cause any breakage *except* it keeps the "ospke" and
"pku" bits from showing up in cpuinfo.
Now cpuinfo has the two new flags:
flags : ... pku ospke
BTW, is it really wise to have cpufeature.h and cpufeatures.h?
It seems like they can only cause confusion and mahem with tab
completion.
Reported-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Acked-by: Borislav Petkov <bp@suse.de>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Dave Hansen <dave@sr71.net>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20160310221213.06F9DB53@viggo.jf.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Srivatsa S. Bhat <srivatsa@csail.mit.edu>
Reviewed-by: Matt Helsley (VMware) <matt.helsley@gmail.com>
Reviewed-by: Alexey Makhalov <amakhalov@vmware.com>
Reviewed-by: Bo Gan <ganb@vmware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/x86/include/asm/cpufeature.h | 4 ----
arch/x86/include/asm/cpufeatures.h | 4 ++++
2 files changed, 4 insertions(+), 4 deletions(-)
--- a/arch/x86/include/asm/cpufeature.h
+++ b/arch/x86/include/asm/cpufeature.h
@@ -94,10 +94,6 @@ extern const char * const x86_bug_flags[
(__builtin_constant_p(bit) && REQUIRED_MASK_BIT_SET(bit) ? 1 : \
x86_this_cpu_test_bit(bit, (unsigned long *)&cpu_info.x86_capability))
-/* Intel-defined CPU features, CPUID level 0x00000007:0 (ecx), word 16 */
-#define X86_FEATURE_PKU (16*32+ 3) /* Protection Keys for Userspace */
-#define X86_FEATURE_OSPKE (16*32+ 4) /* OS Protection Keys Enable */
-
/*
* This macro is for detection of features which need kernel
* infrastructure to be used. It may *not* directly test the CPU
--- a/arch/x86/include/asm/cpufeatures.h
+++ b/arch/x86/include/asm/cpufeatures.h
@@ -276,6 +276,10 @@
#define X86_FEATURE_PAUSEFILTER (15*32+10) /* filtered pause intercept */
#define X86_FEATURE_PFTHRESHOLD (15*32+12) /* pause filter threshold */
+/* Intel-defined CPU features, CPUID level 0x00000007:0 (ecx), word 16 */
+#define X86_FEATURE_PKU (16*32+ 3) /* Protection Keys for Userspace */
+#define X86_FEATURE_OSPKE (16*32+ 4) /* OS Protection Keys Enable */
+
/*
* BUG word(s)
*/
^ permalink raw reply [flat|nested] 53+ messages in thread* [PATCH 4.4 32/43] x86/cpu: Add detection of AMD RAS Capabilities
2018-07-16 7:36 [PATCH 4.4 00/43] 4.4.141-stable review Greg Kroah-Hartman
` (30 preceding siblings ...)
2018-07-16 7:36 ` [PATCH 4.4 31/43] x86/mm/pkeys: Fix mismerge of protection keys CPUID bits Greg Kroah-Hartman
@ 2018-07-16 7:36 ` Greg Kroah-Hartman
2018-07-16 7:36 ` [PATCH 4.4 33/43] x86/cpufeature, x86/mm/pkeys: Fix broken compile-time disabling of pkeys Greg Kroah-Hartman
` (13 subsequent siblings)
45 siblings, 0 replies; 53+ messages in thread
From: Greg Kroah-Hartman @ 2018-07-16 7:36 UTC (permalink / raw)
To: linux-kernel
Cc: Greg Kroah-Hartman, stable, Yazen Ghannam, Borislav Petkov,
Andy Lutomirski, Borislav Petkov, Brian Gerst, Denys Vlasenko,
H. Peter Anvin, Linus Torvalds, Peter Zijlstra, Thomas Gleixner,
Tony Luck, linux-edac, Ingo Molnar, Srivatsa S. Bhat,
Matt Helsley (VMware),
Alexey Makhalov, Bo Gan
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Yazen Ghannam <Yazen.Ghannam@amd.com>
commit 71faad43060d3d2040583635fbf7d1bdb3d04118 upstream
Add a new CPUID leaf to hold the contents of CPUID 0x80000007_EBX (RasCap).
Define bits that are currently in use:
Bit 0: McaOverflowRecov
Bit 1: SUCCOR
Bit 3: ScalableMca
Signed-off-by: Yazen Ghannam <Yazen.Ghannam@amd.com>
[ Shorten comment. ]
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Link: http://lkml.kernel.org/r/1462971509-3856-5-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Srivatsa S. Bhat <srivatsa@csail.mit.edu>
Reviewed-by: Matt Helsley (VMware) <matt.helsley@gmail.com>
Reviewed-by: Alexey Makhalov <amakhalov@vmware.com>
Reviewed-by: Bo Gan <ganb@vmware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/x86/include/asm/cpufeature.h | 1 +
arch/x86/include/asm/cpufeatures.h | 7 ++++++-
arch/x86/kernel/cpu/common.c | 10 +++++++---
3 files changed, 14 insertions(+), 4 deletions(-)
--- a/arch/x86/include/asm/cpufeature.h
+++ b/arch/x86/include/asm/cpufeature.h
@@ -27,6 +27,7 @@ enum cpuid_leafs
CPUID_6_EAX,
CPUID_8000_000A_EDX,
CPUID_7_ECX,
+ CPUID_8000_0007_EBX,
};
#ifdef CONFIG_X86_FEATURE_NAMES
--- a/arch/x86/include/asm/cpufeatures.h
+++ b/arch/x86/include/asm/cpufeatures.h
@@ -12,7 +12,7 @@
/*
* Defines x86 CPU feature bits
*/
-#define NCAPINTS 17 /* N 32-bit words worth of info */
+#define NCAPINTS 18 /* N 32-bit words worth of info */
#define NBUGINTS 1 /* N 32-bit bug flags */
/*
@@ -280,6 +280,11 @@
#define X86_FEATURE_PKU (16*32+ 3) /* Protection Keys for Userspace */
#define X86_FEATURE_OSPKE (16*32+ 4) /* OS Protection Keys Enable */
+/* AMD-defined CPU features, CPUID level 0x80000007 (ebx), word 17 */
+#define X86_FEATURE_OVERFLOW_RECOV (17*32+0) /* MCA overflow recovery support */
+#define X86_FEATURE_SUCCOR (17*32+1) /* Uncorrectable error containment and recovery */
+#define X86_FEATURE_SMCA (17*32+3) /* Scalable MCA */
+
/*
* BUG word(s)
*/
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -741,6 +741,13 @@ void get_cpu_cap(struct cpuinfo_x86 *c)
}
}
+ if (c->extended_cpuid_level >= 0x80000007) {
+ cpuid(0x80000007, &eax, &ebx, &ecx, &edx);
+
+ c->x86_capability[CPUID_8000_0007_EBX] = ebx;
+ c->x86_power = edx;
+ }
+
if (c->extended_cpuid_level >= 0x80000008) {
cpuid(0x80000008, &eax, &ebx, &ecx, &edx);
@@ -753,9 +760,6 @@ void get_cpu_cap(struct cpuinfo_x86 *c)
c->x86_phys_bits = 36;
#endif
- if (c->extended_cpuid_level >= 0x80000007)
- c->x86_power = cpuid_edx(0x80000007);
-
if (c->extended_cpuid_level >= 0x8000000a)
c->x86_capability[CPUID_8000_000A_EDX] = cpuid_edx(0x8000000a);
^ permalink raw reply [flat|nested] 53+ messages in thread* [PATCH 4.4 33/43] x86/cpufeature, x86/mm/pkeys: Fix broken compile-time disabling of pkeys
2018-07-16 7:36 [PATCH 4.4 00/43] 4.4.141-stable review Greg Kroah-Hartman
` (31 preceding siblings ...)
2018-07-16 7:36 ` [PATCH 4.4 32/43] x86/cpu: Add detection of AMD RAS Capabilities Greg Kroah-Hartman
@ 2018-07-16 7:36 ` Greg Kroah-Hartman
2018-07-16 7:36 ` [PATCH 4.4 34/43] x86/cpufeature: Update cpufeaure macros Greg Kroah-Hartman
` (12 subsequent siblings)
45 siblings, 0 replies; 53+ messages in thread
From: Greg Kroah-Hartman @ 2018-07-16 7:36 UTC (permalink / raw)
To: linux-kernel
Cc: Greg Kroah-Hartman, stable, Dave Hansen, Alexander Shishkin,
Arnaldo Carvalho de Melo, Dave Hansen, Jiri Olsa, Linus Torvalds,
Peter Zijlstra, Stephane Eranian, Thomas Gleixner, Vince Weaver,
Ingo Molnar, Srivatsa S. Bhat, Matt Helsley (VMware),
Alexey Makhalov, Bo Gan
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Dave Hansen <dave.hansen@linux.intel.com>
commit e8df1a95b685af84a81698199ee206e0e66a8b44 upstream
When I added support for the Memory Protection Keys processor
feature, I had to reindent the REQUIRED/DISABLED_MASK macros, and
also consult the later cpufeature words.
I'm not quite sure how I bungled it, but I consulted the wrong
word at the end. This only affected required or disabled cpu
features in cpufeature words 14, 15 and 16. So, only Protection
Keys itself was screwed over here.
The result was that if you disabled pkeys in your .config, you
might still see some code show up that should have been compiled
out. There should be no functional problems, though.
In verifying this patch I also realized that the DISABLE_PKU/OSPKE
macros were defined backwards and that the cpu_has() check in
setup_pku() was not doing the compile-time disabled checks.
So also fix the macro for DISABLE_PKU/OSPKE and add a compile-time
check for pkeys being enabled in setup_pku().
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Cc: <stable@vger.kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Dave Hansen <dave@sr71.net>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Fixes: dfb4a70f20c5 ("x86/cpufeature, x86/mm/pkeys: Add protection keys related CPUID definitions")
Link: http://lkml.kernel.org/r/20160513221328.C200930B@viggo.jf.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Srivatsa S. Bhat <srivatsa@csail.mit.edu>
Reviewed-by: Matt Helsley (VMware) <matt.helsley@gmail.com>
Reviewed-by: Alexey Makhalov <amakhalov@vmware.com>
Reviewed-by: Bo Gan <ganb@vmware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/x86/include/asm/cpufeature.h | 12 ++++++------
arch/x86/include/asm/disabled-features.h | 6 +++---
2 files changed, 9 insertions(+), 9 deletions(-)
--- a/arch/x86/include/asm/cpufeature.h
+++ b/arch/x86/include/asm/cpufeature.h
@@ -64,9 +64,9 @@ extern const char * const x86_bug_flags[
(((bit)>>5)==11 && (1UL<<((bit)&31) & REQUIRED_MASK11)) || \
(((bit)>>5)==12 && (1UL<<((bit)&31) & REQUIRED_MASK12)) || \
(((bit)>>5)==13 && (1UL<<((bit)&31) & REQUIRED_MASK13)) || \
- (((bit)>>5)==13 && (1UL<<((bit)&31) & REQUIRED_MASK14)) || \
- (((bit)>>5)==13 && (1UL<<((bit)&31) & REQUIRED_MASK15)) || \
- (((bit)>>5)==14 && (1UL<<((bit)&31) & REQUIRED_MASK16)) )
+ (((bit)>>5)==14 && (1UL<<((bit)&31) & REQUIRED_MASK14)) || \
+ (((bit)>>5)==15 && (1UL<<((bit)&31) & REQUIRED_MASK15)) || \
+ (((bit)>>5)==16 && (1UL<<((bit)&31) & REQUIRED_MASK16)) )
#define DISABLED_MASK_BIT_SET(bit) \
( (((bit)>>5)==0 && (1UL<<((bit)&31) & DISABLED_MASK0 )) || \
@@ -83,9 +83,9 @@ extern const char * const x86_bug_flags[
(((bit)>>5)==11 && (1UL<<((bit)&31) & DISABLED_MASK11)) || \
(((bit)>>5)==12 && (1UL<<((bit)&31) & DISABLED_MASK12)) || \
(((bit)>>5)==13 && (1UL<<((bit)&31) & DISABLED_MASK13)) || \
- (((bit)>>5)==13 && (1UL<<((bit)&31) & DISABLED_MASK14)) || \
- (((bit)>>5)==13 && (1UL<<((bit)&31) & DISABLED_MASK15)) || \
- (((bit)>>5)==14 && (1UL<<((bit)&31) & DISABLED_MASK16)) )
+ (((bit)>>5)==14 && (1UL<<((bit)&31) & DISABLED_MASK14)) || \
+ (((bit)>>5)==15 && (1UL<<((bit)&31) & DISABLED_MASK15)) || \
+ (((bit)>>5)==16 && (1UL<<((bit)&31) & DISABLED_MASK16)) )
#define cpu_has(c, bit) \
(__builtin_constant_p(bit) && REQUIRED_MASK_BIT_SET(bit) ? 1 : \
--- a/arch/x86/include/asm/disabled-features.h
+++ b/arch/x86/include/asm/disabled-features.h
@@ -31,11 +31,11 @@
#endif /* CONFIG_X86_64 */
#ifdef CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS
-# define DISABLE_PKU (1<<(X86_FEATURE_PKU))
-# define DISABLE_OSPKE (1<<(X86_FEATURE_OSPKE))
-#else
# define DISABLE_PKU 0
# define DISABLE_OSPKE 0
+#else
+# define DISABLE_PKU (1<<(X86_FEATURE_PKU & 31))
+# define DISABLE_OSPKE (1<<(X86_FEATURE_OSPKE & 31))
#endif /* CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS */
/*
^ permalink raw reply [flat|nested] 53+ messages in thread* [PATCH 4.4 34/43] x86/cpufeature: Update cpufeaure macros
2018-07-16 7:36 [PATCH 4.4 00/43] 4.4.141-stable review Greg Kroah-Hartman
` (32 preceding siblings ...)
2018-07-16 7:36 ` [PATCH 4.4 33/43] x86/cpufeature, x86/mm/pkeys: Fix broken compile-time disabling of pkeys Greg Kroah-Hartman
@ 2018-07-16 7:36 ` Greg Kroah-Hartman
2018-07-16 7:36 ` [PATCH 4.4 35/43] x86/cpufeature: Make sure DISABLED/REQUIRED macros are updated Greg Kroah-Hartman
` (11 subsequent siblings)
45 siblings, 0 replies; 53+ messages in thread
From: Greg Kroah-Hartman @ 2018-07-16 7:36 UTC (permalink / raw)
To: linux-kernel
Cc: Greg Kroah-Hartman, stable, Dave Hansen, Andy Lutomirski,
Borislav Petkov, Brian Gerst, Dave Hansen, Denys Vlasenko,
H. Peter Anvin, Josh Poimboeuf, Linus Torvalds, Peter Zijlstra,
Thomas Gleixner, Ingo Molnar, Srivatsa S. Bhat,
Matt Helsley (VMware),
Alexey Makhalov, Bo Gan
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Dave Hansen <dave.hansen@linux.intel.com>
commit 6e17cb9c2d5efd8fcc3934e983733302b9912ff8 upstream
We had a new CPUID "NCAPINT" word added, but the REQUIRED_MASK and
DISABLED_MASK macros did not get updated. Update them.
None of the features was needed in these masks, so there was no
harm, but we should keep them updated anyway.
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dave Hansen <dave@sr71.net>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20160629200107.8D3C9A31@viggo.jf.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Srivatsa S. Bhat <srivatsa@csail.mit.edu>
Reviewed-by: Matt Helsley (VMware) <matt.helsley@gmail.com>
Reviewed-by: Alexey Makhalov <amakhalov@vmware.com>
Reviewed-by: Bo Gan <ganb@vmware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/x86/include/asm/cpufeature.h | 6 ++++--
arch/x86/include/asm/disabled-features.h | 1 +
arch/x86/include/asm/required-features.h | 1 +
3 files changed, 6 insertions(+), 2 deletions(-)
--- a/arch/x86/include/asm/cpufeature.h
+++ b/arch/x86/include/asm/cpufeature.h
@@ -66,7 +66,8 @@ extern const char * const x86_bug_flags[
(((bit)>>5)==13 && (1UL<<((bit)&31) & REQUIRED_MASK13)) || \
(((bit)>>5)==14 && (1UL<<((bit)&31) & REQUIRED_MASK14)) || \
(((bit)>>5)==15 && (1UL<<((bit)&31) & REQUIRED_MASK15)) || \
- (((bit)>>5)==16 && (1UL<<((bit)&31) & REQUIRED_MASK16)) )
+ (((bit)>>5)==16 && (1UL<<((bit)&31) & REQUIRED_MASK16)) || \
+ (((bit)>>5)==17 && (1UL<<((bit)&31) & REQUIRED_MASK17)))
#define DISABLED_MASK_BIT_SET(bit) \
( (((bit)>>5)==0 && (1UL<<((bit)&31) & DISABLED_MASK0 )) || \
@@ -85,7 +86,8 @@ extern const char * const x86_bug_flags[
(((bit)>>5)==13 && (1UL<<((bit)&31) & DISABLED_MASK13)) || \
(((bit)>>5)==14 && (1UL<<((bit)&31) & DISABLED_MASK14)) || \
(((bit)>>5)==15 && (1UL<<((bit)&31) & DISABLED_MASK15)) || \
- (((bit)>>5)==16 && (1UL<<((bit)&31) & DISABLED_MASK16)) )
+ (((bit)>>5)==16 && (1UL<<((bit)&31) & DISABLED_MASK16)) || \
+ (((bit)>>5)==17 && (1UL<<((bit)&31) & DISABLED_MASK17)))
#define cpu_has(c, bit) \
(__builtin_constant_p(bit) && REQUIRED_MASK_BIT_SET(bit) ? 1 : \
--- a/arch/x86/include/asm/disabled-features.h
+++ b/arch/x86/include/asm/disabled-features.h
@@ -58,5 +58,6 @@
#define DISABLED_MASK14 0
#define DISABLED_MASK15 0
#define DISABLED_MASK16 (DISABLE_PKU|DISABLE_OSPKE)
+#define DISABLED_MASK17 0
#endif /* _ASM_X86_DISABLED_FEATURES_H */
--- a/arch/x86/include/asm/required-features.h
+++ b/arch/x86/include/asm/required-features.h
@@ -99,5 +99,6 @@
#define REQUIRED_MASK14 0
#define REQUIRED_MASK15 0
#define REQUIRED_MASK16 0
+#define REQUIRED_MASK17 0
#endif /* _ASM_X86_REQUIRED_FEATURES_H */
^ permalink raw reply [flat|nested] 53+ messages in thread* [PATCH 4.4 35/43] x86/cpufeature: Make sure DISABLED/REQUIRED macros are updated
2018-07-16 7:36 [PATCH 4.4 00/43] 4.4.141-stable review Greg Kroah-Hartman
` (33 preceding siblings ...)
2018-07-16 7:36 ` [PATCH 4.4 34/43] x86/cpufeature: Update cpufeaure macros Greg Kroah-Hartman
@ 2018-07-16 7:36 ` Greg Kroah-Hartman
2018-07-16 7:36 ` [PATCH 4.4 36/43] x86/cpufeature: Add helper macro for mask check macros Greg Kroah-Hartman
` (10 subsequent siblings)
45 siblings, 0 replies; 53+ messages in thread
From: Greg Kroah-Hartman @ 2018-07-16 7:36 UTC (permalink / raw)
To: linux-kernel
Cc: Greg Kroah-Hartman, stable, Dave Hansen, Andy Lutomirski,
Borislav Petkov, Brian Gerst, Dave Hansen, Denys Vlasenko,
H. Peter Anvin, Josh Poimboeuf, Linus Torvalds, Peter Zijlstra,
Thomas Gleixner, Ingo Molnar, Srivatsa S. Bhat,
Matt Helsley (VMware),
Alexey Makhalov, Bo Gan
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Dave Hansen <dave.hansen@linux.intel.com>
commit 1e61f78baf893c7eb49f633d23ccbb420c8f808e upstream
x86 has two macros which allow us to evaluate some CPUID-based
features at compile time:
REQUIRED_MASK_BIT_SET()
DISABLED_MASK_BIT_SET()
They're both defined by having the compiler check the bit
argument against some constant masks of features.
But, when adding new CPUID leaves, we need to check new words
for these macros. So make sure that those macros and the
REQUIRED_MASK* and DISABLED_MASK* get updated when necessary.
This looks kinda silly to have an open-coded value ("18" in
this case) open-coded in 5 places in the code. But, we really do
need 5 places updated when NCAPINTS gets bumped, so now we just
force the issue.
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dave Hansen <dave@sr71.net>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20160629200108.92466F6F@viggo.jf.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Srivatsa S. Bhat <srivatsa@csail.mit.edu>
Reviewed-by: Matt Helsley (VMware) <matt.helsley@gmail.com>
Reviewed-by: Alexey Makhalov <amakhalov@vmware.com>
Reviewed-by: Bo Gan <ganb@vmware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/x86/include/asm/cpufeature.h | 8 ++++++--
arch/x86/include/asm/disabled-features.h | 1 +
arch/x86/include/asm/required-features.h | 1 +
3 files changed, 8 insertions(+), 2 deletions(-)
--- a/arch/x86/include/asm/cpufeature.h
+++ b/arch/x86/include/asm/cpufeature.h
@@ -67,7 +67,9 @@ extern const char * const x86_bug_flags[
(((bit)>>5)==14 && (1UL<<((bit)&31) & REQUIRED_MASK14)) || \
(((bit)>>5)==15 && (1UL<<((bit)&31) & REQUIRED_MASK15)) || \
(((bit)>>5)==16 && (1UL<<((bit)&31) & REQUIRED_MASK16)) || \
- (((bit)>>5)==17 && (1UL<<((bit)&31) & REQUIRED_MASK17)))
+ (((bit)>>5)==17 && (1UL<<((bit)&31) & REQUIRED_MASK17)) || \
+ REQUIRED_MASK_CHECK || \
+ BUILD_BUG_ON_ZERO(NCAPINTS != 18))
#define DISABLED_MASK_BIT_SET(bit) \
( (((bit)>>5)==0 && (1UL<<((bit)&31) & DISABLED_MASK0 )) || \
@@ -87,7 +89,9 @@ extern const char * const x86_bug_flags[
(((bit)>>5)==14 && (1UL<<((bit)&31) & DISABLED_MASK14)) || \
(((bit)>>5)==15 && (1UL<<((bit)&31) & DISABLED_MASK15)) || \
(((bit)>>5)==16 && (1UL<<((bit)&31) & DISABLED_MASK16)) || \
- (((bit)>>5)==17 && (1UL<<((bit)&31) & DISABLED_MASK17)))
+ (((bit)>>5)==17 && (1UL<<((bit)&31) & DISABLED_MASK17)) || \
+ DISABLED_MASK_CHECK || \
+ BUILD_BUG_ON_ZERO(NCAPINTS != 18))
#define cpu_has(c, bit) \
(__builtin_constant_p(bit) && REQUIRED_MASK_BIT_SET(bit) ? 1 : \
--- a/arch/x86/include/asm/disabled-features.h
+++ b/arch/x86/include/asm/disabled-features.h
@@ -59,5 +59,6 @@
#define DISABLED_MASK15 0
#define DISABLED_MASK16 (DISABLE_PKU|DISABLE_OSPKE)
#define DISABLED_MASK17 0
+#define DISABLED_MASK_CHECK BUILD_BUG_ON_ZERO(NCAPINTS != 18)
#endif /* _ASM_X86_DISABLED_FEATURES_H */
--- a/arch/x86/include/asm/required-features.h
+++ b/arch/x86/include/asm/required-features.h
@@ -100,5 +100,6 @@
#define REQUIRED_MASK15 0
#define REQUIRED_MASK16 0
#define REQUIRED_MASK17 0
+#define REQUIRED_MASK_CHECK BUILD_BUG_ON_ZERO(NCAPINTS != 18)
#endif /* _ASM_X86_REQUIRED_FEATURES_H */
^ permalink raw reply [flat|nested] 53+ messages in thread* [PATCH 4.4 36/43] x86/cpufeature: Add helper macro for mask check macros
2018-07-16 7:36 [PATCH 4.4 00/43] 4.4.141-stable review Greg Kroah-Hartman
` (34 preceding siblings ...)
2018-07-16 7:36 ` [PATCH 4.4 35/43] x86/cpufeature: Make sure DISABLED/REQUIRED macros are updated Greg Kroah-Hartman
@ 2018-07-16 7:36 ` Greg Kroah-Hartman
2018-07-16 7:36 ` [PATCH 4.4 37/43] uprobes/x86: Remove incorrect WARN_ON() in uprobe_init_insn() Greg Kroah-Hartman
` (9 subsequent siblings)
45 siblings, 0 replies; 53+ messages in thread
From: Greg Kroah-Hartman @ 2018-07-16 7:36 UTC (permalink / raw)
To: linux-kernel
Cc: Greg Kroah-Hartman, stable, Dave Hansen, Andy Lutomirski,
Borislav Petkov, Brian Gerst, Dave Hansen, Denys Vlasenko,
H. Peter Anvin, Josh Poimboeuf, Linus Torvalds, Peter Zijlstra,
Thomas Gleixner, Ingo Molnar, Srivatsa S. Bhat,
Matt Helsley (VMware),
Alexey Makhalov, Bo Gan
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Dave Hansen <dave.hansen@linux.intel.com>
commit 8eda072e9d7c3429a372e3635dc5851f4a42dee1 upstream
Every time we add a word to our cpu features, we need to add
something like this in two places:
(((bit)>>5)==16 && (1UL<<((bit)&31) & REQUIRED_MASK16))
The trick is getting the "16" in this case in both places. I've
now screwed this up twice, so as pennance, I've come up with
this patch to keep me and other poor souls from doing the same.
I also commented the logic behind the bit manipulation showcased
above.
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dave Hansen <dave@sr71.net>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20160629200110.1BA8949E@viggo.jf.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Srivatsa S. Bhat <srivatsa@csail.mit.edu>
Reviewed-by: Matt Helsley (VMware) <matt.helsley@gmail.com>
Reviewed-by: Alexey Makhalov <amakhalov@vmware.com>
Reviewed-by: Bo Gan <ganb@vmware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/x86/include/asm/cpufeature.h | 90 +++++++++++++++++++++-----------------
1 file changed, 50 insertions(+), 40 deletions(-)
--- a/arch/x86/include/asm/cpufeature.h
+++ b/arch/x86/include/asm/cpufeature.h
@@ -49,48 +49,58 @@ extern const char * const x86_bug_flags[
#define test_cpu_cap(c, bit) \
test_bit(bit, (unsigned long *)((c)->x86_capability))
-#define REQUIRED_MASK_BIT_SET(bit) \
- ( (((bit)>>5)==0 && (1UL<<((bit)&31) & REQUIRED_MASK0 )) || \
- (((bit)>>5)==1 && (1UL<<((bit)&31) & REQUIRED_MASK1 )) || \
- (((bit)>>5)==2 && (1UL<<((bit)&31) & REQUIRED_MASK2 )) || \
- (((bit)>>5)==3 && (1UL<<((bit)&31) & REQUIRED_MASK3 )) || \
- (((bit)>>5)==4 && (1UL<<((bit)&31) & REQUIRED_MASK4 )) || \
- (((bit)>>5)==5 && (1UL<<((bit)&31) & REQUIRED_MASK5 )) || \
- (((bit)>>5)==6 && (1UL<<((bit)&31) & REQUIRED_MASK6 )) || \
- (((bit)>>5)==7 && (1UL<<((bit)&31) & REQUIRED_MASK7 )) || \
- (((bit)>>5)==8 && (1UL<<((bit)&31) & REQUIRED_MASK8 )) || \
- (((bit)>>5)==9 && (1UL<<((bit)&31) & REQUIRED_MASK9 )) || \
- (((bit)>>5)==10 && (1UL<<((bit)&31) & REQUIRED_MASK10)) || \
- (((bit)>>5)==11 && (1UL<<((bit)&31) & REQUIRED_MASK11)) || \
- (((bit)>>5)==12 && (1UL<<((bit)&31) & REQUIRED_MASK12)) || \
- (((bit)>>5)==13 && (1UL<<((bit)&31) & REQUIRED_MASK13)) || \
- (((bit)>>5)==14 && (1UL<<((bit)&31) & REQUIRED_MASK14)) || \
- (((bit)>>5)==15 && (1UL<<((bit)&31) & REQUIRED_MASK15)) || \
- (((bit)>>5)==16 && (1UL<<((bit)&31) & REQUIRED_MASK16)) || \
- (((bit)>>5)==17 && (1UL<<((bit)&31) & REQUIRED_MASK17)) || \
- REQUIRED_MASK_CHECK || \
+/*
+ * There are 32 bits/features in each mask word. The high bits
+ * (selected with (bit>>5) give us the word number and the low 5
+ * bits give us the bit/feature number inside the word.
+ * (1UL<<((bit)&31) gives us a mask for the feature_bit so we can
+ * see if it is set in the mask word.
+ */
+#define CHECK_BIT_IN_MASK_WORD(maskname, word, bit) \
+ (((bit)>>5)==(word) && (1UL<<((bit)&31) & maskname##word ))
+
+#define REQUIRED_MASK_BIT_SET(feature_bit) \
+ ( CHECK_BIT_IN_MASK_WORD(REQUIRED_MASK, 0, feature_bit) || \
+ CHECK_BIT_IN_MASK_WORD(REQUIRED_MASK, 1, feature_bit) || \
+ CHECK_BIT_IN_MASK_WORD(REQUIRED_MASK, 2, feature_bit) || \
+ CHECK_BIT_IN_MASK_WORD(REQUIRED_MASK, 3, feature_bit) || \
+ CHECK_BIT_IN_MASK_WORD(REQUIRED_MASK, 4, feature_bit) || \
+ CHECK_BIT_IN_MASK_WORD(REQUIRED_MASK, 5, feature_bit) || \
+ CHECK_BIT_IN_MASK_WORD(REQUIRED_MASK, 6, feature_bit) || \
+ CHECK_BIT_IN_MASK_WORD(REQUIRED_MASK, 7, feature_bit) || \
+ CHECK_BIT_IN_MASK_WORD(REQUIRED_MASK, 8, feature_bit) || \
+ CHECK_BIT_IN_MASK_WORD(REQUIRED_MASK, 9, feature_bit) || \
+ CHECK_BIT_IN_MASK_WORD(REQUIRED_MASK, 10, feature_bit) || \
+ CHECK_BIT_IN_MASK_WORD(REQUIRED_MASK, 11, feature_bit) || \
+ CHECK_BIT_IN_MASK_WORD(REQUIRED_MASK, 12, feature_bit) || \
+ CHECK_BIT_IN_MASK_WORD(REQUIRED_MASK, 13, feature_bit) || \
+ CHECK_BIT_IN_MASK_WORD(REQUIRED_MASK, 14, feature_bit) || \
+ CHECK_BIT_IN_MASK_WORD(REQUIRED_MASK, 15, feature_bit) || \
+ CHECK_BIT_IN_MASK_WORD(REQUIRED_MASK, 16, feature_bit) || \
+ CHECK_BIT_IN_MASK_WORD(REQUIRED_MASK, 17, feature_bit) || \
+ REQUIRED_MASK_CHECK || \
BUILD_BUG_ON_ZERO(NCAPINTS != 18))
-#define DISABLED_MASK_BIT_SET(bit) \
- ( (((bit)>>5)==0 && (1UL<<((bit)&31) & DISABLED_MASK0 )) || \
- (((bit)>>5)==1 && (1UL<<((bit)&31) & DISABLED_MASK1 )) || \
- (((bit)>>5)==2 && (1UL<<((bit)&31) & DISABLED_MASK2 )) || \
- (((bit)>>5)==3 && (1UL<<((bit)&31) & DISABLED_MASK3 )) || \
- (((bit)>>5)==4 && (1UL<<((bit)&31) & DISABLED_MASK4 )) || \
- (((bit)>>5)==5 && (1UL<<((bit)&31) & DISABLED_MASK5 )) || \
- (((bit)>>5)==6 && (1UL<<((bit)&31) & DISABLED_MASK6 )) || \
- (((bit)>>5)==7 && (1UL<<((bit)&31) & DISABLED_MASK7 )) || \
- (((bit)>>5)==8 && (1UL<<((bit)&31) & DISABLED_MASK8 )) || \
- (((bit)>>5)==9 && (1UL<<((bit)&31) & DISABLED_MASK9 )) || \
- (((bit)>>5)==10 && (1UL<<((bit)&31) & DISABLED_MASK10)) || \
- (((bit)>>5)==11 && (1UL<<((bit)&31) & DISABLED_MASK11)) || \
- (((bit)>>5)==12 && (1UL<<((bit)&31) & DISABLED_MASK12)) || \
- (((bit)>>5)==13 && (1UL<<((bit)&31) & DISABLED_MASK13)) || \
- (((bit)>>5)==14 && (1UL<<((bit)&31) & DISABLED_MASK14)) || \
- (((bit)>>5)==15 && (1UL<<((bit)&31) & DISABLED_MASK15)) || \
- (((bit)>>5)==16 && (1UL<<((bit)&31) & DISABLED_MASK16)) || \
- (((bit)>>5)==17 && (1UL<<((bit)&31) & DISABLED_MASK17)) || \
- DISABLED_MASK_CHECK || \
+#define DISABLED_MASK_BIT_SET(feature_bit) \
+ ( CHECK_BIT_IN_MASK_WORD(DISABLED_MASK, 0, feature_bit) || \
+ CHECK_BIT_IN_MASK_WORD(DISABLED_MASK, 1, feature_bit) || \
+ CHECK_BIT_IN_MASK_WORD(DISABLED_MASK, 2, feature_bit) || \
+ CHECK_BIT_IN_MASK_WORD(DISABLED_MASK, 3, feature_bit) || \
+ CHECK_BIT_IN_MASK_WORD(DISABLED_MASK, 4, feature_bit) || \
+ CHECK_BIT_IN_MASK_WORD(DISABLED_MASK, 5, feature_bit) || \
+ CHECK_BIT_IN_MASK_WORD(DISABLED_MASK, 6, feature_bit) || \
+ CHECK_BIT_IN_MASK_WORD(DISABLED_MASK, 7, feature_bit) || \
+ CHECK_BIT_IN_MASK_WORD(DISABLED_MASK, 8, feature_bit) || \
+ CHECK_BIT_IN_MASK_WORD(DISABLED_MASK, 9, feature_bit) || \
+ CHECK_BIT_IN_MASK_WORD(DISABLED_MASK, 10, feature_bit) || \
+ CHECK_BIT_IN_MASK_WORD(DISABLED_MASK, 11, feature_bit) || \
+ CHECK_BIT_IN_MASK_WORD(DISABLED_MASK, 12, feature_bit) || \
+ CHECK_BIT_IN_MASK_WORD(DISABLED_MASK, 13, feature_bit) || \
+ CHECK_BIT_IN_MASK_WORD(DISABLED_MASK, 14, feature_bit) || \
+ CHECK_BIT_IN_MASK_WORD(DISABLED_MASK, 15, feature_bit) || \
+ CHECK_BIT_IN_MASK_WORD(DISABLED_MASK, 16, feature_bit) || \
+ CHECK_BIT_IN_MASK_WORD(DISABLED_MASK, 17, feature_bit) || \
+ DISABLED_MASK_CHECK || \
BUILD_BUG_ON_ZERO(NCAPINTS != 18))
#define cpu_has(c, bit) \
^ permalink raw reply [flat|nested] 53+ messages in thread* [PATCH 4.4 37/43] uprobes/x86: Remove incorrect WARN_ON() in uprobe_init_insn()
2018-07-16 7:36 [PATCH 4.4 00/43] 4.4.141-stable review Greg Kroah-Hartman
` (35 preceding siblings ...)
2018-07-16 7:36 ` [PATCH 4.4 36/43] x86/cpufeature: Add helper macro for mask check macros Greg Kroah-Hartman
@ 2018-07-16 7:36 ` Greg Kroah-Hartman
2018-07-16 7:36 ` [PATCH 4.4 38/43] netfilter: nf_queue: augment nfqa_cfg_policy Greg Kroah-Hartman
` (8 subsequent siblings)
45 siblings, 0 replies; 53+ messages in thread
From: Greg Kroah-Hartman @ 2018-07-16 7:36 UTC (permalink / raw)
To: linux-kernel
Cc: Greg Kroah-Hartman, stable, syzbot+30d675e3ca03c1c351e7,
Oleg Nesterov, Masami Hiramatsu, Linus Torvalds, Peter Zijlstra,
Thomas Gleixner, syzkaller-bugs, Ingo Molnar
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Oleg Nesterov <oleg@redhat.com>
commit 90718e32e1dcc2479acfa208ccfc6442850b594c upstream.
insn_get_length() has the side-effect of processing the entire instruction
but only if it was decoded successfully, otherwise insn_complete() can fail
and in this case we need to just return an error without warning.
Reported-by: syzbot+30d675e3ca03c1c351e7@syzkaller.appspotmail.com
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Reviewed-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: syzkaller-bugs@googlegroups.com
Link: https://lkml.kernel.org/lkml/20180518162739.GA5559@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/x86/kernel/uprobes.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/x86/kernel/uprobes.c
+++ b/arch/x86/kernel/uprobes.c
@@ -290,7 +290,7 @@ static int uprobe_init_insn(struct arch_
insn_init(insn, auprobe->insn, sizeof(auprobe->insn), x86_64);
/* has the side-effect of processing the entire instruction */
insn_get_length(insn);
- if (WARN_ON_ONCE(!insn_complete(insn)))
+ if (!insn_complete(insn))
return -ENOEXEC;
if (is_prefix_bad(insn))
^ permalink raw reply [flat|nested] 53+ messages in thread* [PATCH 4.4 38/43] netfilter: nf_queue: augment nfqa_cfg_policy
2018-07-16 7:36 [PATCH 4.4 00/43] 4.4.141-stable review Greg Kroah-Hartman
` (36 preceding siblings ...)
2018-07-16 7:36 ` [PATCH 4.4 37/43] uprobes/x86: Remove incorrect WARN_ON() in uprobe_init_insn() Greg Kroah-Hartman
@ 2018-07-16 7:36 ` Greg Kroah-Hartman
2018-07-16 7:36 ` [PATCH 4.4 39/43] netfilter: x_tables: initialise match/target check parameter struct Greg Kroah-Hartman
` (7 subsequent siblings)
45 siblings, 0 replies; 53+ messages in thread
From: Greg Kroah-Hartman @ 2018-07-16 7:36 UTC (permalink / raw)
To: linux-kernel
Cc: Greg Kroah-Hartman, stable, Eric Dumazet, syzbot, Pablo Neira Ayuso
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Eric Dumazet <edumazet@google.com>
commit ba062ebb2cd561d404e0fba8ee4b3f5ebce7cbfc upstream.
Three attributes are currently not verified, thus can trigger KMSAN
warnings such as :
BUG: KMSAN: uninit-value in __arch_swab32 arch/x86/include/uapi/asm/swab.h:10 [inline]
BUG: KMSAN: uninit-value in __fswab32 include/uapi/linux/swab.h:59 [inline]
BUG: KMSAN: uninit-value in nfqnl_recv_config+0x939/0x17d0 net/netfilter/nfnetlink_queue.c:1268
CPU: 1 PID: 4521 Comm: syz-executor120 Not tainted 4.17.0+ #5
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x185/0x1d0 lib/dump_stack.c:113
kmsan_report+0x188/0x2a0 mm/kmsan/kmsan.c:1117
__msan_warning_32+0x70/0xc0 mm/kmsan/kmsan_instr.c:620
__arch_swab32 arch/x86/include/uapi/asm/swab.h:10 [inline]
__fswab32 include/uapi/linux/swab.h:59 [inline]
nfqnl_recv_config+0x939/0x17d0 net/netfilter/nfnetlink_queue.c:1268
nfnetlink_rcv_msg+0xb2e/0xc80 net/netfilter/nfnetlink.c:212
netlink_rcv_skb+0x37e/0x600 net/netlink/af_netlink.c:2448
nfnetlink_rcv+0x2fe/0x680 net/netfilter/nfnetlink.c:513
netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline]
netlink_unicast+0x1680/0x1750 net/netlink/af_netlink.c:1336
netlink_sendmsg+0x104f/0x1350 net/netlink/af_netlink.c:1901
sock_sendmsg_nosec net/socket.c:629 [inline]
sock_sendmsg net/socket.c:639 [inline]
___sys_sendmsg+0xec8/0x1320 net/socket.c:2117
__sys_sendmsg net/socket.c:2155 [inline]
__do_sys_sendmsg net/socket.c:2164 [inline]
__se_sys_sendmsg net/socket.c:2162 [inline]
__x64_sys_sendmsg+0x331/0x460 net/socket.c:2162
do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:287
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x43fd59
RSP: 002b:00007ffde0e30d28 EFLAGS: 00000213 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fd59
RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000003
RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8
R10: 00000000004002c8 R11: 0000000000000213 R12: 0000000000401680
R13: 0000000000401710 R14: 0000000000000000 R15: 0000000000000000
Uninit was created at:
kmsan_save_stack_with_flags mm/kmsan/kmsan.c:279 [inline]
kmsan_internal_poison_shadow+0xb8/0x1b0 mm/kmsan/kmsan.c:189
kmsan_kmalloc+0x94/0x100 mm/kmsan/kmsan.c:315
kmsan_slab_alloc+0x10/0x20 mm/kmsan/kmsan.c:322
slab_post_alloc_hook mm/slab.h:446 [inline]
slab_alloc_node mm/slub.c:2753 [inline]
__kmalloc_node_track_caller+0xb35/0x11b0 mm/slub.c:4395
__kmalloc_reserve net/core/skbuff.c:138 [inline]
__alloc_skb+0x2cb/0x9e0 net/core/skbuff.c:206
alloc_skb include/linux/skbuff.h:988 [inline]
netlink_alloc_large_skb net/netlink/af_netlink.c:1182 [inline]
netlink_sendmsg+0x76e/0x1350 net/netlink/af_netlink.c:1876
sock_sendmsg_nosec net/socket.c:629 [inline]
sock_sendmsg net/socket.c:639 [inline]
___sys_sendmsg+0xec8/0x1320 net/socket.c:2117
__sys_sendmsg net/socket.c:2155 [inline]
__do_sys_sendmsg net/socket.c:2164 [inline]
__se_sys_sendmsg net/socket.c:2162 [inline]
__x64_sys_sendmsg+0x331/0x460 net/socket.c:2162
do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:287
entry_SYSCALL_64_after_hwframe+0x44/0xa9
Fixes: fdb694a01f1f ("netfilter: Add fail-open support")
Fixes: 829e17a1a602 ("[NETFILTER]: nfnetlink_queue: allow changing queue length through netlink")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/netfilter/nfnetlink_queue.c | 3 +++
1 file changed, 3 insertions(+)
--- a/net/netfilter/nfnetlink_queue.c
+++ b/net/netfilter/nfnetlink_queue.c
@@ -1106,6 +1106,9 @@ nfqnl_recv_unsupp(struct sock *ctnl, str
static const struct nla_policy nfqa_cfg_policy[NFQA_CFG_MAX+1] = {
[NFQA_CFG_CMD] = { .len = sizeof(struct nfqnl_msg_config_cmd) },
[NFQA_CFG_PARAMS] = { .len = sizeof(struct nfqnl_msg_config_params) },
+ [NFQA_CFG_QUEUE_MAXLEN] = { .type = NLA_U32 },
+ [NFQA_CFG_MASK] = { .type = NLA_U32 },
+ [NFQA_CFG_FLAGS] = { .type = NLA_U32 },
};
static const struct nf_queue_handler nfqh = {
^ permalink raw reply [flat|nested] 53+ messages in thread* [PATCH 4.4 39/43] netfilter: x_tables: initialise match/target check parameter struct
2018-07-16 7:36 [PATCH 4.4 00/43] 4.4.141-stable review Greg Kroah-Hartman
` (37 preceding siblings ...)
2018-07-16 7:36 ` [PATCH 4.4 38/43] netfilter: nf_queue: augment nfqa_cfg_policy Greg Kroah-Hartman
@ 2018-07-16 7:36 ` Greg Kroah-Hartman
2018-07-16 7:36 ` [PATCH 4.4 40/43] loop: add recursion validation to LOOP_CHANGE_FD Greg Kroah-Hartman
` (6 subsequent siblings)
45 siblings, 0 replies; 53+ messages in thread
From: Greg Kroah-Hartman @ 2018-07-16 7:36 UTC (permalink / raw)
To: linux-kernel
Cc: Greg Kroah-Hartman, stable, syzbot+da4494182233c23a5fcf,
Florian Westphal, Pablo Neira Ayuso
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Florian Westphal <fw@strlen.de>
commit c568503ef02030f169c9e19204def610a3510918 upstream.
syzbot reports following splat:
BUG: KMSAN: uninit-value in ebt_stp_mt_check+0x24b/0x450
net/bridge/netfilter/ebt_stp.c:162
ebt_stp_mt_check+0x24b/0x450 net/bridge/netfilter/ebt_stp.c:162
xt_check_match+0x1438/0x1650 net/netfilter/x_tables.c:506
ebt_check_match net/bridge/netfilter/ebtables.c:372 [inline]
ebt_check_entry net/bridge/netfilter/ebtables.c:702 [inline]
The uninitialised access is
xt_mtchk_param->nft_compat
... which should be set to 0.
Fix it by zeroing the struct beforehand, same for tgchk.
ip(6)tables targetinfo uses c99-style initialiser, so no change
needed there.
Reported-by: syzbot+da4494182233c23a5fcf@syzkaller.appspotmail.com
Fixes: 55917a21d0cc0 ("netfilter: x_tables: add context to know if extension runs from nft_compat")
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/bridge/netfilter/ebtables.c | 2 ++
net/ipv4/netfilter/ip_tables.c | 1 +
net/ipv6/netfilter/ip6_tables.c | 1 +
3 files changed, 4 insertions(+)
--- a/net/bridge/netfilter/ebtables.c
+++ b/net/bridge/netfilter/ebtables.c
@@ -701,6 +701,8 @@ ebt_check_entry(struct ebt_entry *e, str
}
i = 0;
+ memset(&mtpar, 0, sizeof(mtpar));
+ memset(&tgpar, 0, sizeof(tgpar));
mtpar.net = tgpar.net = net;
mtpar.table = tgpar.table = name;
mtpar.entryinfo = tgpar.entryinfo = e;
--- a/net/ipv4/netfilter/ip_tables.c
+++ b/net/ipv4/netfilter/ip_tables.c
@@ -663,6 +663,7 @@ find_check_entry(struct ipt_entry *e, st
return -ENOMEM;
j = 0;
+ memset(&mtpar, 0, sizeof(mtpar));
mtpar.net = net;
mtpar.table = name;
mtpar.entryinfo = &e->ip;
--- a/net/ipv6/netfilter/ip6_tables.c
+++ b/net/ipv6/netfilter/ip6_tables.c
@@ -676,6 +676,7 @@ find_check_entry(struct ip6t_entry *e, s
return -ENOMEM;
j = 0;
+ memset(&mtpar, 0, sizeof(mtpar));
mtpar.net = net;
mtpar.table = name;
mtpar.entryinfo = &e->ipv6;
^ permalink raw reply [flat|nested] 53+ messages in thread* [PATCH 4.4 40/43] loop: add recursion validation to LOOP_CHANGE_FD
2018-07-16 7:36 [PATCH 4.4 00/43] 4.4.141-stable review Greg Kroah-Hartman
` (38 preceding siblings ...)
2018-07-16 7:36 ` [PATCH 4.4 39/43] netfilter: x_tables: initialise match/target check parameter struct Greg Kroah-Hartman
@ 2018-07-16 7:36 ` Greg Kroah-Hartman
2018-08-22 21:43 ` Ben Hutchings
2018-07-16 7:36 ` [PATCH 4.4 41/43] PM / hibernate: Fix oops at snapshot_write() Greg Kroah-Hartman
` (5 subsequent siblings)
45 siblings, 1 reply; 53+ messages in thread
From: Greg Kroah-Hartman @ 2018-07-16 7:36 UTC (permalink / raw)
To: linux-kernel
Cc: Greg Kroah-Hartman, stable,
syzbot+4349872271ece473a7c91190b68b4bac7c5dbc87,
syzbot+40bd32c4d9a3cc12a339, syzbot+769c54e66f994b041be7,
syzbot+0a89a9ce473936c57065, Theodore Tso, Jens Axboe
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Theodore Ts'o <tytso@mit.edu>
commit d2ac838e4cd7e5e9891ecc094d626734b0245c99 upstream.
Refactor the validation code used in LOOP_SET_FD so it is also used in
LOOP_CHANGE_FD. Otherwise it is possible to construct a set of loop
devices that all refer to each other. This can lead to a infinite
loop in starting with "while (is_loop_device(f)) .." in loop_set_fd().
Fix this by refactoring out the validation code and using it for
LOOP_CHANGE_FD as well as LOOP_SET_FD.
Reported-by: syzbot+4349872271ece473a7c91190b68b4bac7c5dbc87@syzkaller.appspotmail.com
Reported-by: syzbot+40bd32c4d9a3cc12a339@syzkaller.appspotmail.com
Reported-by: syzbot+769c54e66f994b041be7@syzkaller.appspotmail.com
Reported-by: syzbot+0a89a9ce473936c57065@syzkaller.appspotmail.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/block/loop.c | 68 ++++++++++++++++++++++++++++-----------------------
1 file changed, 38 insertions(+), 30 deletions(-)
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -651,6 +651,36 @@ static void loop_reread_partitions(struc
__func__, lo->lo_number, lo->lo_file_name, rc);
}
+static inline int is_loop_device(struct file *file)
+{
+ struct inode *i = file->f_mapping->host;
+
+ return i && S_ISBLK(i->i_mode) && MAJOR(i->i_rdev) == LOOP_MAJOR;
+}
+
+static int loop_validate_file(struct file *file, struct block_device *bdev)
+{
+ struct inode *inode = file->f_mapping->host;
+ struct file *f = file;
+
+ /* Avoid recursion */
+ while (is_loop_device(f)) {
+ struct loop_device *l;
+
+ if (f->f_mapping->host->i_bdev == bdev)
+ return -EBADF;
+
+ l = f->f_mapping->host->i_bdev->bd_disk->private_data;
+ if (l->lo_state == Lo_unbound) {
+ return -EINVAL;
+ }
+ f = l->lo_backing_file;
+ }
+ if (!S_ISREG(inode->i_mode) && !S_ISBLK(inode->i_mode))
+ return -EINVAL;
+ return 0;
+}
+
/*
* loop_change_fd switched the backing store of a loopback device to
* a new file. This is useful for operating system installers to free up
@@ -680,14 +710,15 @@ static int loop_change_fd(struct loop_de
if (!file)
goto out;
+ error = loop_validate_file(file, bdev);
+ if (error)
+ goto out_putf;
+
inode = file->f_mapping->host;
old_file = lo->lo_backing_file;
error = -EINVAL;
- if (!S_ISREG(inode->i_mode) && !S_ISBLK(inode->i_mode))
- goto out_putf;
-
/* size of the new backing store needs to be the same */
if (get_loop_size(lo, file) != get_loop_size(lo, old_file))
goto out_putf;
@@ -708,13 +739,6 @@ static int loop_change_fd(struct loop_de
return error;
}
-static inline int is_loop_device(struct file *file)
-{
- struct inode *i = file->f_mapping->host;
-
- return i && S_ISBLK(i->i_mode) && MAJOR(i->i_rdev) == LOOP_MAJOR;
-}
-
/* loop sysfs attributes */
static ssize_t loop_attr_show(struct device *dev, char *page,
@@ -872,7 +896,7 @@ static int loop_prepare_queue(struct loo
static int loop_set_fd(struct loop_device *lo, fmode_t mode,
struct block_device *bdev, unsigned int arg)
{
- struct file *file, *f;
+ struct file *file;
struct inode *inode;
struct address_space *mapping;
unsigned lo_blocksize;
@@ -892,29 +916,13 @@ static int loop_set_fd(struct loop_devic
if (lo->lo_state != Lo_unbound)
goto out_putf;
- /* Avoid recursion */
- f = file;
- while (is_loop_device(f)) {
- struct loop_device *l;
-
- if (f->f_mapping->host->i_bdev == bdev)
- goto out_putf;
-
- l = f->f_mapping->host->i_bdev->bd_disk->private_data;
- if (l->lo_state == Lo_unbound) {
- error = -EINVAL;
- goto out_putf;
- }
- f = l->lo_backing_file;
- }
+ error = loop_validate_file(file, bdev);
+ if (error)
+ goto out_putf;
mapping = file->f_mapping;
inode = mapping->host;
- error = -EINVAL;
- if (!S_ISREG(inode->i_mode) && !S_ISBLK(inode->i_mode))
- goto out_putf;
-
if (!(file->f_mode & FMODE_WRITE) || !(mode & FMODE_WRITE) ||
!file->f_op->write_iter)
lo_flags |= LO_FLAGS_READ_ONLY;
^ permalink raw reply [flat|nested] 53+ messages in thread* Re: [PATCH 4.4 40/43] loop: add recursion validation to LOOP_CHANGE_FD
2018-07-16 7:36 ` [PATCH 4.4 40/43] loop: add recursion validation to LOOP_CHANGE_FD Greg Kroah-Hartman
@ 2018-08-22 21:43 ` Ben Hutchings
0 siblings, 0 replies; 53+ messages in thread
From: Ben Hutchings @ 2018-08-22 21:43 UTC (permalink / raw)
To: Theodore Tso, Jens Axboe; +Cc: Greg Kroah-Hartman, LKML, stable
On Mon, 2018-07-16 at 09:36 +0200, Greg Kroah-Hartman wrote:
> 4.4-stable review patch. If anyone has any objections, please let me know.
>
> ------------------
>
> From: Theodore Ts'o <tytso@mit.edu>
>
> commit d2ac838e4cd7e5e9891ecc094d626734b0245c99 upstream.
>
> Refactor the validation code used in LOOP_SET_FD so it is also used in
> LOOP_CHANGE_FD. Otherwise it is possible to construct a set of loop
> devices that all refer to each other. This can lead to a infinite
> loop in starting with "while (is_loop_device(f)) .." in loop_set_fd().
>
> Fix this by refactoring out the validation code and using it for
> LOOP_CHANGE_FD as well as LOOP_SET_FD.
[...]
> +static int loop_validate_file(struct file *file, struct block_device *bdev)
> +{
> + struct inode *inode = file->f_mapping->host;
> + struct file *f = file;
> +
> + /* Avoid recursion */
> + while (is_loop_device(f)) {
> + struct loop_device *l;
> +
> + if (f->f_mapping->host->i_bdev == bdev)
> + return -EBADF;
> +
> + l = f->f_mapping->host->i_bdev->bd_disk->private_data;
> + if (l->lo_state == Lo_unbound) {
> + return -EINVAL;
> + }
> + f = l->lo_backing_file;
This looks racy; I don't see anything that prevents a lower loop device
from being reconfigured while this walks down the device stack.
(But this isn't a new problem.)
Ben.
> + }
> + if (!S_ISREG(inode->i_mode) && !S_ISBLK(inode->i_mode))
> + return -EINVAL;
> + return 0;
> +}
[...]
--
Ben Hutchings, Software Developer Codethink Ltd
https://www.codethink.co.uk/ Dale House, 35 Dale Street
Manchester, M1 2HF, United Kingdom
^ permalink raw reply [flat|nested] 53+ messages in thread
* [PATCH 4.4 41/43] PM / hibernate: Fix oops at snapshot_write()
2018-07-16 7:36 [PATCH 4.4 00/43] 4.4.141-stable review Greg Kroah-Hartman
` (39 preceding siblings ...)
2018-07-16 7:36 ` [PATCH 4.4 40/43] loop: add recursion validation to LOOP_CHANGE_FD Greg Kroah-Hartman
@ 2018-07-16 7:36 ` Greg Kroah-Hartman
2018-07-16 7:36 ` [PATCH 4.4 42/43] RDMA/ucm: Mark UCM interface as BROKEN Greg Kroah-Hartman
` (4 subsequent siblings)
45 siblings, 0 replies; 53+ messages in thread
From: Greg Kroah-Hartman @ 2018-07-16 7:36 UTC (permalink / raw)
To: linux-kernel
Cc: Greg Kroah-Hartman, stable, Tetsuo Handa, syzbot, Rafael J. Wysocki
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
commit fc14eebfc20854a38fd9f1d93a42b1783dad4d17 upstream.
syzbot is reporting NULL pointer dereference at snapshot_write() [1].
This is because data->handle is zero-cleared by ioctl(SNAPSHOT_FREE).
Fix this by checking data_of(data->handle) != NULL before using it.
[1] https://syzkaller.appspot.com/bug?id=828a3c71bd344a6de8b6a31233d51a72099f27fd
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Reported-by: syzbot <syzbot+ae590932da6e45d6564d@syzkaller.appspotmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
kernel/power/user.c | 5 +++++
1 file changed, 5 insertions(+)
--- a/kernel/power/user.c
+++ b/kernel/power/user.c
@@ -184,6 +184,11 @@ static ssize_t snapshot_write(struct fil
res = PAGE_SIZE - pg_offp;
}
+ if (!data_of(data->handle)) {
+ res = -EINVAL;
+ goto unlock;
+ }
+
res = simple_write_to_buffer(data_of(data->handle), res, &pg_offp,
buf, count);
if (res > 0)
^ permalink raw reply [flat|nested] 53+ messages in thread* [PATCH 4.4 42/43] RDMA/ucm: Mark UCM interface as BROKEN
2018-07-16 7:36 [PATCH 4.4 00/43] 4.4.141-stable review Greg Kroah-Hartman
` (40 preceding siblings ...)
2018-07-16 7:36 ` [PATCH 4.4 41/43] PM / hibernate: Fix oops at snapshot_write() Greg Kroah-Hartman
@ 2018-07-16 7:36 ` Greg Kroah-Hartman
2018-07-16 7:36 ` [PATCH 4.4 43/43] loop: remember whether sysfs_create_group() was done Greg Kroah-Hartman
` (3 subsequent siblings)
45 siblings, 0 replies; 53+ messages in thread
From: Greg Kroah-Hartman @ 2018-07-16 7:36 UTC (permalink / raw)
To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Leon Romanovsky, Jason Gunthorpe
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Leon Romanovsky <leonro@mellanox.com>
commit 7a8690ed6f5346f6738971892205e91d39b6b901 upstream.
In commit 357d23c811a7 ("Remove the obsolete libibcm library")
in rdma-core [1], we removed obsolete library which used the
/dev/infiniband/ucmX interface.
Following multiple syzkaller reports about non-sanitized
user input in the UCMA module, the short audit reveals the same
issues in UCM module too.
It is better to disable this interface in the kernel,
before syzkaller team invests time and energy to harden
this unused interface.
[1] https://github.com/linux-rdma/rdma-core/pull/279
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/infiniband/Kconfig | 12 ++++++++++++
drivers/infiniband/core/Makefile | 4 ++--
2 files changed, 14 insertions(+), 2 deletions(-)
--- a/drivers/infiniband/Kconfig
+++ b/drivers/infiniband/Kconfig
@@ -33,6 +33,18 @@ config INFINIBAND_USER_ACCESS
libibverbs, libibcm and a hardware driver library from
<http://www.openfabrics.org/git/>.
+config INFINIBAND_USER_ACCESS_UCM
+ bool "Userspace CM (UCM, DEPRECATED)"
+ depends on BROKEN
+ depends on INFINIBAND_USER_ACCESS
+ help
+ The UCM module has known security flaws, which no one is
+ interested to fix. The user-space part of this code was
+ dropped from the upstream a long time ago.
+
+ This option is DEPRECATED and planned to be removed.
+
+
config INFINIBAND_USER_MEM
bool
depends on INFINIBAND_USER_ACCESS != n
--- a/drivers/infiniband/core/Makefile
+++ b/drivers/infiniband/core/Makefile
@@ -5,8 +5,8 @@ obj-$(CONFIG_INFINIBAND) += ib_core.o i
ib_cm.o iw_cm.o ib_addr.o \
$(infiniband-y)
obj-$(CONFIG_INFINIBAND_USER_MAD) += ib_umad.o
-obj-$(CONFIG_INFINIBAND_USER_ACCESS) += ib_uverbs.o ib_ucm.o \
- $(user_access-y)
+obj-$(CONFIG_INFINIBAND_USER_ACCESS) += ib_uverbs.o $(user_access-y)
+obj-$(CONFIG_INFINIBAND_USER_ACCESS_UCM) += ib_ucm.o $(user_access-y)
ib_core-y := packer.o ud_header.o verbs.o sysfs.o \
device.o fmr_pool.o cache.o netlink.o \
^ permalink raw reply [flat|nested] 53+ messages in thread* [PATCH 4.4 43/43] loop: remember whether sysfs_create_group() was done
2018-07-16 7:36 [PATCH 4.4 00/43] 4.4.141-stable review Greg Kroah-Hartman
` (41 preceding siblings ...)
2018-07-16 7:36 ` [PATCH 4.4 42/43] RDMA/ucm: Mark UCM interface as BROKEN Greg Kroah-Hartman
@ 2018-07-16 7:36 ` Greg Kroah-Hartman
2018-07-16 13:55 ` [PATCH 4.4 00/43] 4.4.141-stable review Nathan Chancellor
` (2 subsequent siblings)
45 siblings, 0 replies; 53+ messages in thread
From: Greg Kroah-Hartman @ 2018-07-16 7:36 UTC (permalink / raw)
To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Tetsuo Handa, syzbot, Jens Axboe
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
commit d3349b6b3c373ac1fbfb040b810fcee5e2adc7e0 upstream.
syzbot is hitting WARN() triggered by memory allocation fault
injection [1] because loop module is calling sysfs_remove_group()
when sysfs_create_group() failed.
Fix this by remembering whether sysfs_create_group() succeeded.
[1] https://syzkaller.appspot.com/bug?id=3f86c0edf75c86d2633aeb9dd69eccc70bc7e90b
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Reported-by: syzbot <syzbot+9f03168400f56df89dbc6f1751f4458fe739ff29@syzkaller.appspotmail.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Renamed sysfs_ready -> sysfs_inited.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/block/loop.c | 11 ++++++-----
drivers/block/loop.h | 1 +
2 files changed, 7 insertions(+), 5 deletions(-)
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -835,16 +835,17 @@ static struct attribute_group loop_attri
.attrs= loop_attrs,
};
-static int loop_sysfs_init(struct loop_device *lo)
+static void loop_sysfs_init(struct loop_device *lo)
{
- return sysfs_create_group(&disk_to_dev(lo->lo_disk)->kobj,
- &loop_attribute_group);
+ lo->sysfs_inited = !sysfs_create_group(&disk_to_dev(lo->lo_disk)->kobj,
+ &loop_attribute_group);
}
static void loop_sysfs_exit(struct loop_device *lo)
{
- sysfs_remove_group(&disk_to_dev(lo->lo_disk)->kobj,
- &loop_attribute_group);
+ if (lo->sysfs_inited)
+ sysfs_remove_group(&disk_to_dev(lo->lo_disk)->kobj,
+ &loop_attribute_group);
}
static void loop_config_discard(struct loop_device *lo)
--- a/drivers/block/loop.h
+++ b/drivers/block/loop.h
@@ -59,6 +59,7 @@ struct loop_device {
struct kthread_worker worker;
struct task_struct *worker_task;
bool use_dio;
+ bool sysfs_inited;
struct request_queue *lo_queue;
struct blk_mq_tag_set tag_set;
^ permalink raw reply [flat|nested] 53+ messages in thread* Re: [PATCH 4.4 00/43] 4.4.141-stable review
2018-07-16 7:36 [PATCH 4.4 00/43] 4.4.141-stable review Greg Kroah-Hartman
` (42 preceding siblings ...)
2018-07-16 7:36 ` [PATCH 4.4 43/43] loop: remember whether sysfs_create_group() was done Greg Kroah-Hartman
@ 2018-07-16 13:55 ` Nathan Chancellor
2018-07-16 16:22 ` Guenter Roeck
2018-07-17 8:06 ` Naresh Kamboju
45 siblings, 0 replies; 53+ messages in thread
From: Nathan Chancellor @ 2018-07-16 13:55 UTC (permalink / raw)
To: Greg Kroah-Hartman
Cc: linux-kernel, torvalds, akpm, linux, shuah, patches,
ben.hutchings, lkft-triage, stable
On Mon, Jul 16, 2018 at 09:36:05AM +0200, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 4.4.141 release.
> There are 43 patches in this series, all will be posted as a response
> to this one. If anyone has any issues with these being applied, please
> let me know.
>
> Responses should be made by Wed Jul 18 07:34:50 UTC 2018.
> Anything received after that time might be too late.
>
> The whole patch series can be found in one patch at:
> https://www.kernel.org/pub/linux/kernel/v4.x/stable-review/patch-4.4.141-rc1.gz
> or in the git tree and branch at:
> git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.4.y
> and the diffstat can be found below.
>
> thanks,
>
> greg k-h
>
Merged, compiled with -Werror, and installed onto my Pixel 2 XL.
No issues noticed in dmesg or general usage.
Thanks!
Nathan
^ permalink raw reply [flat|nested] 53+ messages in thread* Re: [PATCH 4.4 00/43] 4.4.141-stable review
2018-07-16 7:36 [PATCH 4.4 00/43] 4.4.141-stable review Greg Kroah-Hartman
` (43 preceding siblings ...)
2018-07-16 13:55 ` [PATCH 4.4 00/43] 4.4.141-stable review Nathan Chancellor
@ 2018-07-16 16:22 ` Guenter Roeck
2018-07-17 8:06 ` Naresh Kamboju
45 siblings, 0 replies; 53+ messages in thread
From: Guenter Roeck @ 2018-07-16 16:22 UTC (permalink / raw)
To: Greg Kroah-Hartman
Cc: linux-kernel, torvalds, akpm, shuah, patches, ben.hutchings,
lkft-triage, stable
On Mon, Jul 16, 2018 at 09:36:05AM +0200, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 4.4.141 release.
> There are 43 patches in this series, all will be posted as a response
> to this one. If anyone has any issues with these being applied, please
> let me know.
>
> Responses should be made by Wed Jul 18 07:34:50 UTC 2018.
> Anything received after that time might be too late.
>
Build results:
total: 148 pass: 148 fail: 0
Qemu test results:
total: 149 pass: 149 fail: 0
Details are available at http://kerneltests.org/builders.
Guenter
^ permalink raw reply [flat|nested] 53+ messages in thread* Re: [PATCH 4.4 00/43] 4.4.141-stable review
2018-07-16 7:36 [PATCH 4.4 00/43] 4.4.141-stable review Greg Kroah-Hartman
` (44 preceding siblings ...)
2018-07-16 16:22 ` Guenter Roeck
@ 2018-07-17 8:06 ` Naresh Kamboju
45 siblings, 0 replies; 53+ messages in thread
From: Naresh Kamboju @ 2018-07-17 8:06 UTC (permalink / raw)
To: Greg Kroah-Hartman
Cc: open list, Linus Torvalds, Andrew Morton, Guenter Roeck,
Shuah Khan, patches, Ben Hutchings, lkft-triage, linux- stable
On 16 July 2018 at 13:06, Greg Kroah-Hartman <gregkh@linuxfoundation.org> wrote:
> This is the start of the stable review cycle for the 4.4.141 release.
> There are 43 patches in this series, all will be posted as a response
> to this one. If anyone has any issues with these being applied, please
> let me know.
>
> Responses should be made by Wed Jul 18 07:34:50 UTC 2018.
> Anything received after that time might be too late.
>
> The whole patch series can be found in one patch at:
> https://www.kernel.org/pub/linux/kernel/v4.x/stable-review/patch-4.4.141-rc1.gz
> or in the git tree and branch at:
> git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.4.y
> and the diffstat can be found below.
>
> thanks,
>
> greg k-h
> Linus Torvalds <torvalds@linux-foundation.org>
> Fix up non-directory creation in SGID directories
( For the record, sharing the report again on 4.4 )
Results from Linaro’s test farm.
Regressions detected.
LTP syscalls failed test cases on all devices arm64, arm32 and x86_64,
- creat08
- open10
Reported this bug internally on upstream Linux mainline week back.
Now this bug happening on 4.17, 4.14, 4.9 and 4.4
creat08 and open10 failed with this error,
TFAIL : testdir.B.3132/setgid: Incorrect modes, setgid bit should be set
^ permalink raw reply [flat|nested] 53+ messages in thread