From: Tom Lendacky <thomas.lendacky@amd.com>
To: x86@kernel.org, linux-kernel@vger.kernel.org,
linux-arch@vger.kernel.org, linux-efi@vger.kernel.org,
linux-doc@vger.kernel.org, linux-mm@kvack.org,
kvm@vger.kernel.org, kasan-dev@googlegroups.com
Cc: "Radim Krčmář" <rkrcmar@redhat.com>,
"Arnd Bergmann" <arnd@arndb.de>,
"Jonathan Corbet" <corbet@lwn.net>,
"Matt Fleming" <matt@codeblueprint.co.uk>,
"Konrad Rzeszutek Wilk" <konrad.wilk@oracle.com>,
"Andrey Ryabinin" <aryabinin@virtuozzo.com>,
"Ingo Molnar" <mingo@redhat.com>,
"Borislav Petkov" <bp@alien8.de>,
"Andy Lutomirski" <luto@kernel.org>,
"H. Peter Anvin" <hpa@zytor.com>,
"Paolo Bonzini" <pbonzini@redhat.com>,
"Alexander Potapenko" <glider@google.com>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Dmitry Vyukov" <dvyukov@google.com>,
"Rik van Riel" <riel@redhat.com>,
"Larry Woodman" <lwoodman@redhat.com>,
"Dave Young" <dyoung@redhat.com>,
"Toshimitsu Kani" <toshi.kani@hpe.com>,
"Michael S. Tsirkin" <mst@redhat.com>,
"Brijesh Singh" <brijesh.singh@amd.com>
Subject: [PATCH v10 03/38] x86, mpparse, x86/acpi, x86/PCI, x86/dmi, SFI: Use memremap for RAM mappings
Date: Mon, 17 Jul 2017 16:10:00 -0500 [thread overview]
Message-ID: <b13fccb9abbd547a7eef7b1fdfc223431b211c88.1500319216.git.thomas.lendacky@amd.com> (raw)
In-Reply-To: <cover.1500319216.git.thomas.lendacky@amd.com>
The ioremap() function is intended for mapping MMIO. For RAM, the
memremap() function should be used. Convert calls from ioremap() to
memremap() when re-mapping RAM.
This will be used later by SME to control how the encryption mask is
applied to memory mappings, with certain memory locations being mapped
decrypted vs encrypted.
Reviewed-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
---
arch/x86/include/asm/dmi.h | 8 ++++----
arch/x86/kernel/acpi/boot.c | 6 +++---
arch/x86/kernel/kdebugfs.c | 34 +++++++++++-----------------------
arch/x86/kernel/ksysfs.c | 28 ++++++++++++++--------------
arch/x86/kernel/mpparse.c | 10 +++++-----
arch/x86/pci/common.c | 4 ++--
drivers/firmware/dmi-sysfs.c | 5 +++--
drivers/firmware/pcdp.c | 4 ++--
drivers/sfi/sfi_core.c | 22 +++++++++++-----------
9 files changed, 55 insertions(+), 66 deletions(-)
diff --git a/arch/x86/include/asm/dmi.h b/arch/x86/include/asm/dmi.h
index 3c69fed..a8e15b0 100644
--- a/arch/x86/include/asm/dmi.h
+++ b/arch/x86/include/asm/dmi.h
@@ -13,9 +13,9 @@ static __always_inline __init void *dmi_alloc(unsigned len)
}
/* Use early IO mappings for DMI because it's initialized early */
-#define dmi_early_remap early_ioremap
-#define dmi_early_unmap early_iounmap
-#define dmi_remap ioremap_cache
-#define dmi_unmap iounmap
+#define dmi_early_remap early_memremap
+#define dmi_early_unmap early_memunmap
+#define dmi_remap(_x, _l) memremap(_x, _l, MEMREMAP_WB)
+#define dmi_unmap(_x) memunmap(_x)
#endif /* _ASM_X86_DMI_H */
diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index 6bb6806..850160a 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -115,7 +115,7 @@
#define ACPI_INVALID_GSI INT_MIN
/*
- * This is just a simple wrapper around early_ioremap(),
+ * This is just a simple wrapper around early_memremap(),
* with sanity checks for phys == 0 and size == 0.
*/
char *__init __acpi_map_table(unsigned long phys, unsigned long size)
@@ -124,7 +124,7 @@ char *__init __acpi_map_table(unsigned long phys, unsigned long size)
if (!phys || !size)
return NULL;
- return early_ioremap(phys, size);
+ return early_memremap(phys, size);
}
void __init __acpi_unmap_table(char *map, unsigned long size)
@@ -132,7 +132,7 @@ void __init __acpi_unmap_table(char *map, unsigned long size)
if (!map || !size)
return;
- early_iounmap(map, size);
+ early_memunmap(map, size);
}
#ifdef CONFIG_X86_LOCAL_APIC
diff --git a/arch/x86/kernel/kdebugfs.c b/arch/x86/kernel/kdebugfs.c
index 38b6458..fd6f8fb 100644
--- a/arch/x86/kernel/kdebugfs.c
+++ b/arch/x86/kernel/kdebugfs.c
@@ -33,7 +33,6 @@ static ssize_t setup_data_read(struct file *file, char __user *user_buf,
struct setup_data_node *node = file->private_data;
unsigned long remain;
loff_t pos = *ppos;
- struct page *pg;
void *p;
u64 pa;
@@ -47,18 +46,13 @@ static ssize_t setup_data_read(struct file *file, char __user *user_buf,
count = node->len - pos;
pa = node->paddr + sizeof(struct setup_data) + pos;
- pg = pfn_to_page((pa + count - 1) >> PAGE_SHIFT);
- if (PageHighMem(pg)) {
- p = ioremap_cache(pa, count);
- if (!p)
- return -ENXIO;
- } else
- p = __va(pa);
+ p = memremap(pa, count, MEMREMAP_WB);
+ if (!p)
+ return -ENOMEM;
remain = copy_to_user(user_buf, p, count);
- if (PageHighMem(pg))
- iounmap(p);
+ memunmap(p);
if (remain)
return -EFAULT;
@@ -109,7 +103,6 @@ static int __init create_setup_data_nodes(struct dentry *parent)
struct setup_data *data;
int error;
struct dentry *d;
- struct page *pg;
u64 pa_data;
int no = 0;
@@ -126,16 +119,12 @@ static int __init create_setup_data_nodes(struct dentry *parent)
goto err_dir;
}
- pg = pfn_to_page((pa_data+sizeof(*data)-1) >> PAGE_SHIFT);
- if (PageHighMem(pg)) {
- data = ioremap_cache(pa_data, sizeof(*data));
- if (!data) {
- kfree(node);
- error = -ENXIO;
- goto err_dir;
- }
- } else
- data = __va(pa_data);
+ data = memremap(pa_data, sizeof(*data), MEMREMAP_WB);
+ if (!data) {
+ kfree(node);
+ error = -ENOMEM;
+ goto err_dir;
+ }
node->paddr = pa_data;
node->type = data->type;
@@ -143,8 +132,7 @@ static int __init create_setup_data_nodes(struct dentry *parent)
error = create_setup_data_node(d, no, node);
pa_data = data->next;
- if (PageHighMem(pg))
- iounmap(data);
+ memunmap(data);
if (error)
goto err_dir;
no++;
diff --git a/arch/x86/kernel/ksysfs.c b/arch/x86/kernel/ksysfs.c
index 4afc67f..ee51db9 100644
--- a/arch/x86/kernel/ksysfs.c
+++ b/arch/x86/kernel/ksysfs.c
@@ -16,8 +16,8 @@
#include <linux/stat.h>
#include <linux/slab.h>
#include <linux/mm.h>
+#include <linux/io.h>
-#include <asm/io.h>
#include <asm/setup.h>
static ssize_t version_show(struct kobject *kobj,
@@ -79,12 +79,12 @@ static int get_setup_data_paddr(int nr, u64 *paddr)
*paddr = pa_data;
return 0;
}
- data = ioremap_cache(pa_data, sizeof(*data));
+ data = memremap(pa_data, sizeof(*data), MEMREMAP_WB);
if (!data)
return -ENOMEM;
pa_data = data->next;
- iounmap(data);
+ memunmap(data);
i++;
}
return -EINVAL;
@@ -97,17 +97,17 @@ static int __init get_setup_data_size(int nr, size_t *size)
u64 pa_data = boot_params.hdr.setup_data;
while (pa_data) {
- data = ioremap_cache(pa_data, sizeof(*data));
+ data = memremap(pa_data, sizeof(*data), MEMREMAP_WB);
if (!data)
return -ENOMEM;
if (nr == i) {
*size = data->len;
- iounmap(data);
+ memunmap(data);
return 0;
}
pa_data = data->next;
- iounmap(data);
+ memunmap(data);
i++;
}
return -EINVAL;
@@ -127,12 +127,12 @@ static ssize_t type_show(struct kobject *kobj,
ret = get_setup_data_paddr(nr, &paddr);
if (ret)
return ret;
- data = ioremap_cache(paddr, sizeof(*data));
+ data = memremap(paddr, sizeof(*data), MEMREMAP_WB);
if (!data)
return -ENOMEM;
ret = sprintf(buf, "0x%x\n", data->type);
- iounmap(data);
+ memunmap(data);
return ret;
}
@@ -154,7 +154,7 @@ static ssize_t setup_data_data_read(struct file *fp,
ret = get_setup_data_paddr(nr, &paddr);
if (ret)
return ret;
- data = ioremap_cache(paddr, sizeof(*data));
+ data = memremap(paddr, sizeof(*data), MEMREMAP_WB);
if (!data)
return -ENOMEM;
@@ -170,15 +170,15 @@ static ssize_t setup_data_data_read(struct file *fp,
goto out;
ret = count;
- p = ioremap_cache(paddr + sizeof(*data), data->len);
+ p = memremap(paddr + sizeof(*data), data->len, MEMREMAP_WB);
if (!p) {
ret = -ENOMEM;
goto out;
}
memcpy(buf, p + off, count);
- iounmap(p);
+ memunmap(p);
out:
- iounmap(data);
+ memunmap(data);
return ret;
}
@@ -250,13 +250,13 @@ static int __init get_setup_data_total_num(u64 pa_data, int *nr)
*nr = 0;
while (pa_data) {
*nr += 1;
- data = ioremap_cache(pa_data, sizeof(*data));
+ data = memremap(pa_data, sizeof(*data), MEMREMAP_WB);
if (!data) {
ret = -ENOMEM;
goto out;
}
pa_data = data->next;
- iounmap(data);
+ memunmap(data);
}
out:
diff --git a/arch/x86/kernel/mpparse.c b/arch/x86/kernel/mpparse.c
index 0d904d7..fd37f39 100644
--- a/arch/x86/kernel/mpparse.c
+++ b/arch/x86/kernel/mpparse.c
@@ -436,9 +436,9 @@ static unsigned long __init get_mpc_size(unsigned long physptr)
struct mpc_table *mpc;
unsigned long size;
- mpc = early_ioremap(physptr, PAGE_SIZE);
+ mpc = early_memremap(physptr, PAGE_SIZE);
size = mpc->length;
- early_iounmap(mpc, PAGE_SIZE);
+ early_memunmap(mpc, PAGE_SIZE);
apic_printk(APIC_VERBOSE, " mpc: %lx-%lx\n", physptr, physptr + size);
return size;
@@ -450,7 +450,7 @@ static int __init check_physptr(struct mpf_intel *mpf, unsigned int early)
unsigned long size;
size = get_mpc_size(mpf->physptr);
- mpc = early_ioremap(mpf->physptr, size);
+ mpc = early_memremap(mpf->physptr, size);
/*
* Read the physical hardware table. Anything here will
* override the defaults.
@@ -461,10 +461,10 @@ static int __init check_physptr(struct mpf_intel *mpf, unsigned int early)
#endif
pr_err("BIOS bug, MP table errors detected!...\n");
pr_cont("... disabling SMP support. (tell your hw vendor)\n");
- early_iounmap(mpc, size);
+ early_memunmap(mpc, size);
return -1;
}
- early_iounmap(mpc, size);
+ early_memunmap(mpc, size);
if (early)
return -1;
diff --git a/arch/x86/pci/common.c b/arch/x86/pci/common.c
index dbe2132..7a5350d 100644
--- a/arch/x86/pci/common.c
+++ b/arch/x86/pci/common.c
@@ -674,7 +674,7 @@ int pcibios_add_device(struct pci_dev *dev)
pa_data = boot_params.hdr.setup_data;
while (pa_data) {
- data = ioremap(pa_data, sizeof(*rom));
+ data = memremap(pa_data, sizeof(*rom), MEMREMAP_WB);
if (!data)
return -ENOMEM;
@@ -693,7 +693,7 @@ int pcibios_add_device(struct pci_dev *dev)
}
}
pa_data = data->next;
- iounmap(data);
+ memunmap(data);
}
set_dma_domain_ops(dev);
set_dev_domain_options(dev);
diff --git a/drivers/firmware/dmi-sysfs.c b/drivers/firmware/dmi-sysfs.c
index ef76e5e..d5de6ee 100644
--- a/drivers/firmware/dmi-sysfs.c
+++ b/drivers/firmware/dmi-sysfs.c
@@ -25,6 +25,7 @@
#include <linux/slab.h>
#include <linux/list.h>
#include <linux/io.h>
+#include <asm/dmi.h>
#define MAX_ENTRY_TYPE 255 /* Most of these aren't used, but we consider
the top entry type is only 8 bits */
@@ -380,7 +381,7 @@ static ssize_t dmi_sel_raw_read_phys32(struct dmi_sysfs_entry *entry,
u8 __iomem *mapped;
ssize_t wrote = 0;
- mapped = ioremap(sel->access_method_address, sel->area_length);
+ mapped = dmi_remap(sel->access_method_address, sel->area_length);
if (!mapped)
return -EIO;
@@ -390,7 +391,7 @@ static ssize_t dmi_sel_raw_read_phys32(struct dmi_sysfs_entry *entry,
wrote++;
}
- iounmap(mapped);
+ dmi_unmap(mapped);
return wrote;
}
diff --git a/drivers/firmware/pcdp.c b/drivers/firmware/pcdp.c
index 75273a25..e83d6ae 100644
--- a/drivers/firmware/pcdp.c
+++ b/drivers/firmware/pcdp.c
@@ -95,7 +95,7 @@
if (efi.hcdp == EFI_INVALID_TABLE_ADDR)
return -ENODEV;
- pcdp = early_ioremap(efi.hcdp, 4096);
+ pcdp = early_memremap(efi.hcdp, 4096);
printk(KERN_INFO "PCDP: v%d at 0x%lx\n", pcdp->rev, efi.hcdp);
if (strstr(cmdline, "console=hcdp")) {
@@ -131,6 +131,6 @@
}
out:
- early_iounmap(pcdp, 4096);
+ early_memunmap(pcdp, 4096);
return rc;
}
diff --git a/drivers/sfi/sfi_core.c b/drivers/sfi/sfi_core.c
index 296db7a..d5ce534 100644
--- a/drivers/sfi/sfi_core.c
+++ b/drivers/sfi/sfi_core.c
@@ -86,13 +86,13 @@
/*
* FW creates and saves the SFI tables in memory. When these tables get
* used, they may need to be mapped to virtual address space, and the mapping
- * can happen before or after the ioremap() is ready, so a flag is needed
+ * can happen before or after the memremap() is ready, so a flag is needed
* to indicating this
*/
-static u32 sfi_use_ioremap __read_mostly;
+static u32 sfi_use_memremap __read_mostly;
/*
- * sfi_un/map_memory calls early_ioremap/iounmap which is a __init function
+ * sfi_un/map_memory calls early_memremap/memunmap which is a __init function
* and introduces section mismatch. So use __ref to make it calm.
*/
static void __iomem * __ref sfi_map_memory(u64 phys, u32 size)
@@ -100,10 +100,10 @@ static void __iomem * __ref sfi_map_memory(u64 phys, u32 size)
if (!phys || !size)
return NULL;
- if (sfi_use_ioremap)
- return ioremap_cache(phys, size);
+ if (sfi_use_memremap)
+ return memremap(phys, size, MEMREMAP_WB);
else
- return early_ioremap(phys, size);
+ return early_memremap(phys, size);
}
static void __ref sfi_unmap_memory(void __iomem *virt, u32 size)
@@ -111,10 +111,10 @@ static void __ref sfi_unmap_memory(void __iomem *virt, u32 size)
if (!virt || !size)
return;
- if (sfi_use_ioremap)
- iounmap(virt);
+ if (sfi_use_memremap)
+ memunmap(virt);
else
- early_iounmap(virt, size);
+ early_memunmap(virt, size);
}
static void sfi_print_table_header(unsigned long long pa,
@@ -507,8 +507,8 @@ void __init sfi_init_late(void)
length = syst_va->header.len;
sfi_unmap_memory(syst_va, sizeof(struct sfi_table_simple));
- /* Use ioremap now after it is ready */
- sfi_use_ioremap = 1;
+ /* Use memremap now after it is ready */
+ sfi_use_memremap = 1;
syst_va = sfi_map_memory(syst_pa, length);
sfi_acpi_init();
--
1.9.1
--
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next prev parent reply other threads:[~2017-07-17 21:11 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-17 21:09 [PATCH v10 00/38] x86: Secure Memory Encryption (AMD) Tom Lendacky
2017-07-17 21:09 ` [PATCH v10 01/38] x86: Document AMD Secure Memory Encryption (SME) Tom Lendacky
2017-07-17 21:09 ` [PATCH v10 02/38] x86/mm/pat: Set write-protect cache mode for full PAT support Tom Lendacky
2017-07-17 21:10 ` Tom Lendacky [this message]
2017-07-17 21:10 ` [PATCH v10 04/38] x86/CPU/AMD: Add the Secure Memory Encryption CPU feature Tom Lendacky
2017-07-17 21:10 ` [PATCH v10 05/38] x86/CPU/AMD: Handle SME reduction in physical address size Tom Lendacky
2017-07-17 21:10 ` [PATCH v10 06/38] x86/mm: Add Secure Memory Encryption (SME) support Tom Lendacky
2017-07-17 21:10 ` [PATCH v10 07/38] x86/mm: Remove phys_to_virt() usage in ioremap() Tom Lendacky
2017-07-17 21:10 ` [PATCH v10 08/38] x86/mm: Add support to enable SME in early boot processing Tom Lendacky
2017-07-17 21:10 ` [PATCH v10 09/38] x86/mm: Simplify p[g4um]d_page() macros Tom Lendacky
2017-07-17 21:10 ` [PATCH v10 10/38] x86/mm: Provide general kernel support for memory encryption Tom Lendacky
2017-07-17 21:10 ` [PATCH v10 11/38] x86/mm: Add SME support for read_cr3_pa() Tom Lendacky
2017-07-17 21:10 ` [PATCH v10 12/38] x86/mm: Extend early_memremap() support with additional attrs Tom Lendacky
2017-07-17 21:10 ` [PATCH v10 13/38] x86/mm: Add support for early encrypt/decrypt of memory Tom Lendacky
2017-07-17 21:10 ` [PATCH v10 14/38] x86/mm: Insure that boot memory areas are mapped properly Tom Lendacky
2017-07-17 21:10 ` [PATCH v10 15/38] x86/boot/e820: Add support to determine the E820 type of an address Tom Lendacky
2017-07-17 21:10 ` [PATCH v10 16/38] efi: Add an EFI table address match function Tom Lendacky
2017-07-17 21:10 ` [PATCH v10 17/38] efi: Update efi_mem_type() to return an error rather than 0 Tom Lendacky
2017-07-17 21:10 ` [PATCH v10 18/38] x86/efi: Update EFI pagetable creation to work with SME Tom Lendacky
2017-07-17 21:10 ` [PATCH v10 19/38] x86/mm: Add support to access boot related data in the clear Tom Lendacky
2017-07-17 21:10 ` [PATCH v10 20/38] x86, mpparse: Use memremap to map the mpf and mpc data Tom Lendacky
2017-11-03 15:12 ` Tomeu Vizoso
2017-11-03 15:31 ` Tom Lendacky
2017-11-06 7:13 ` Tomeu Vizoso
2017-07-17 21:10 ` [PATCH v10 21/38] x86/mm: Add support to access persistent memory in the clear Tom Lendacky
2017-07-17 21:10 ` [PATCH v10 22/38] x86/mm: Add support for changing the memory encryption attribute Tom Lendacky
2017-07-17 21:10 ` [PATCH v10 23/38] x86/realmode: Decrypt trampoline area if memory encryption is active Tom Lendacky
2017-07-17 21:10 ` [PATCH v10 24/38] x86, swiotlb: Add memory encryption support Tom Lendacky
2017-07-17 21:10 ` [PATCH v10 25/38] swiotlb: Add warnings for use of bounce buffers with SME Tom Lendacky
2017-07-17 21:10 ` [PATCH v10 26/38] x86/CPU/AMD: Make the microcode level available earlier in the boot Tom Lendacky
2017-07-17 21:10 ` [PATCH v10 27/38] iommu/amd: Allow the AMD IOMMU to work with memory encryption Tom Lendacky
2017-07-17 21:10 ` [PATCH v10 28/38] x86, realmode: Check for memory encryption on the APs Tom Lendacky
2017-07-17 21:10 ` [PATCH v10 29/38] x86, drm, fbdev: Do not specify encrypted memory for video mappings Tom Lendacky
2017-07-17 21:10 ` [PATCH v10 30/38] kvm: x86: svm: Support Secure Memory Encryption within KVM Tom Lendacky
2017-07-17 21:10 ` [PATCH v10 31/38] x86/mm, kexec: Allow kexec to be used with SME Tom Lendacky
2017-07-17 21:10 ` [PATCH v10 32/38] xen/x86: Remove SME feature in PV guests Tom Lendacky
2017-07-17 21:10 ` [PATCH v10 33/38] x86/mm: Use proper encryption attributes with /dev/mem Tom Lendacky
2017-07-17 21:10 ` [PATCH v10 34/38] x86/mm: Create native_make_p4d() for PGTABLE_LEVELS <= 4 Tom Lendacky
2017-07-17 21:10 ` [PATCH v10 35/38] x86/mm: Add support to encrypt the kernel in-place Tom Lendacky
2017-07-17 21:10 ` [PATCH v10 36/38] x86/boot: Add early cmdline parsing for options with arguments Tom Lendacky
2017-07-17 21:10 ` [PATCH v10 37/38] compiler-gcc.h: Introduce __nostackp function attribute Tom Lendacky
2017-07-18 9:36 ` Ingo Molnar
2017-07-18 13:56 ` Tom Lendacky
2017-07-17 21:10 ` [PATCH v10 38/38] x86/mm: Add support to make use of Secure Memory Encryption Tom Lendacky
2017-07-18 12:03 ` [PATCH v10 00/38] x86: Secure Memory Encryption (AMD) Thomas Gleixner
2017-07-18 14:02 ` Tom Lendacky
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