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From: Borislav Petkov <bp@alien8.de>
To: Ingo Molnar <mingo@kernel.org>
Cc: X86-ML <x86@kernel.org>, LKML <linux-kernel@vger.kernel.org>
Subject: [PATCH 12/18] x86/mm/pat: Wrap pat_enabled
Date: Tue, 26 May 2015 10:28:15 +0200
Message-ID: <1432628901-18044-13-git-send-email-bp@alien8.de> (raw)
In-Reply-To: <1432628901-18044-1-git-send-email-bp@alien8.de>

From: "Luis R. Rodriguez" <mcgrof@suse.com>

We use pat_enabled in x86-specific code to see if PAT is enabled or not
but we're granting full access to it even though readers do not need to
set it. If, for instance, we granted access to it to modules later they
then could override the variable setting... no bueno.

This renames pat_enabled to a new static variable __pat_enabled. Folks
are redirected to use pat_enabled() now.

Code that sets this can only be internal to pat.c. Apart from the early
kernel parameter "nopat" to disable PAT, we also have a few cases that
disable it later and make use of a helper pat_disable(). It is wrapped
under an ifdef but since that code cannot run unless PAT was enabled its
not required to wrap it with ifdefs, unwrap that. Likewise, since "nopat"
doesn't really change non-PAT systems just remove that ifdef as well.

Although we could add and use an early_param_off(), these helpers don't
use __read_mostly but we want to keep __read_mostly for __pat_enabled as
this is a hot path -- upon boot, for instance, a simple guest may see
~4k accesses to pat_enabled(). Since __read_mostly early boot params are
not that common we don't add a helper for them just yet.

Signed-off-by: Luis R. Rodriguez <mcgrof@suse.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Kyle McMartin <kyle@kernel.org>
Cc: Andy Walls <awalls@md.metrocast.net>
Cc: Doug Ledford <dledford@redhat.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Juergen Gross <jgross@suse.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Dave Airlie <airlied@redhat.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Michael S. Tsirkin <mst@redhat.com>
Link: http://lkml.kernel.org/r/1430425520-22275-3-git-send-email-mcgrof@do-not-panic.com
Signed-off-by: Borislav Petkov <bp@suse.de>
---
 arch/x86/include/asm/pat.h      |  7 +------
 arch/x86/kernel/cpu/mtrr/main.c |  2 +-
 arch/x86/mm/iomap_32.c          |  2 +-
 arch/x86/mm/ioremap.c           |  4 ++--
 arch/x86/mm/pageattr.c          |  2 +-
 arch/x86/mm/pat.c               | 33 +++++++++++++++------------------
 arch/x86/pci/i386.c             |  6 +++---
 7 files changed, 24 insertions(+), 32 deletions(-)

diff --git a/arch/x86/include/asm/pat.h b/arch/x86/include/asm/pat.h
index 91bc4ba95f91..cdcff7f7f694 100644
--- a/arch/x86/include/asm/pat.h
+++ b/arch/x86/include/asm/pat.h
@@ -4,12 +4,7 @@
 #include <linux/types.h>
 #include <asm/pgtable_types.h>
 
-#ifdef CONFIG_X86_PAT
-extern int pat_enabled;
-#else
-static const int pat_enabled;
-#endif
-
+bool pat_enabled(void);
 extern void pat_init(void);
 void pat_init_cache_modes(void);
 
diff --git a/arch/x86/kernel/cpu/mtrr/main.c b/arch/x86/kernel/cpu/mtrr/main.c
index 383efb26e516..e7ed0d8ebacb 100644
--- a/arch/x86/kernel/cpu/mtrr/main.c
+++ b/arch/x86/kernel/cpu/mtrr/main.c
@@ -558,7 +558,7 @@ int arch_phys_wc_add(unsigned long base, unsigned long size)
 {
 	int ret;
 
-	if (pat_enabled || !mtrr_enabled())
+	if (pat_enabled() || !mtrr_enabled())
 		return 0;  /* Success!  (We don't need to do anything.) */
 
 	ret = mtrr_add(base, size, MTRR_TYPE_WRCOMB, true);
diff --git a/arch/x86/mm/iomap_32.c b/arch/x86/mm/iomap_32.c
index 9ca35fc60cfe..3a2ec8790ca7 100644
--- a/arch/x86/mm/iomap_32.c
+++ b/arch/x86/mm/iomap_32.c
@@ -82,7 +82,7 @@ iomap_atomic_prot_pfn(unsigned long pfn, pgprot_t prot)
 	 * MTRR is UC or WC.  UC_MINUS gets the real intention, of the
 	 * user, which is "WC if the MTRR is WC, UC if you can't do that."
 	 */
-	if (!pat_enabled && pgprot_val(prot) ==
+	if (!pat_enabled() && pgprot_val(prot) ==
 	    (__PAGE_KERNEL | cachemode2protval(_PAGE_CACHE_MODE_WC)))
 		prot = __pgprot(__PAGE_KERNEL |
 				cachemode2protval(_PAGE_CACHE_MODE_UC_MINUS));
diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c
index a493bb83aa89..82d63ed70045 100644
--- a/arch/x86/mm/ioremap.c
+++ b/arch/x86/mm/ioremap.c
@@ -234,7 +234,7 @@ void __iomem *ioremap_nocache(resource_size_t phys_addr, unsigned long size)
 {
 	/*
 	 * Ideally, this should be:
-	 *	pat_enabled ? _PAGE_CACHE_MODE_UC : _PAGE_CACHE_MODE_UC_MINUS;
+	 *	pat_enabled() ? _PAGE_CACHE_MODE_UC : _PAGE_CACHE_MODE_UC_MINUS;
 	 *
 	 * Till we fix all X drivers to use ioremap_wc(), we will use
 	 * UC MINUS. Drivers that are certain they need or can already
@@ -292,7 +292,7 @@ EXPORT_SYMBOL_GPL(ioremap_uc);
  */
 void __iomem *ioremap_wc(resource_size_t phys_addr, unsigned long size)
 {
-	if (pat_enabled)
+	if (pat_enabled())
 		return __ioremap_caller(phys_addr, size, _PAGE_CACHE_MODE_WC,
 					__builtin_return_address(0));
 	else
diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c
index 397838eb292b..70d221fe2eb4 100644
--- a/arch/x86/mm/pageattr.c
+++ b/arch/x86/mm/pageattr.c
@@ -1571,7 +1571,7 @@ int set_memory_wc(unsigned long addr, int numpages)
 {
 	int ret;
 
-	if (!pat_enabled)
+	if (!pat_enabled())
 		return set_memory_uc(addr, numpages);
 
 	ret = reserve_memtype(__pa(addr), __pa(addr) + numpages * PAGE_SIZE,
diff --git a/arch/x86/mm/pat.c b/arch/x86/mm/pat.c
index 8c50b9bfa996..484dce7f759b 100644
--- a/arch/x86/mm/pat.c
+++ b/arch/x86/mm/pat.c
@@ -36,12 +36,11 @@
 #undef pr_fmt
 #define pr_fmt(fmt) "" fmt
 
-#ifdef CONFIG_X86_PAT
-int __read_mostly pat_enabled = 1;
+static int __read_mostly __pat_enabled = IS_ENABLED(CONFIG_X86_PAT);
 
 static inline void pat_disable(const char *reason)
 {
-	pat_enabled = 0;
+	__pat_enabled = 0;
 	pr_info("x86/PAT: %s\n", reason);
 }
 
@@ -51,13 +50,11 @@ static int __init nopat(char *str)
 	return 0;
 }
 early_param("nopat", nopat);
-#else
-static inline void pat_disable(const char *reason)
+
+bool pat_enabled(void)
 {
-	(void)reason;
+	return !!__pat_enabled;
 }
-#endif
-
 
 int pat_debug_enable;
 
@@ -201,7 +198,7 @@ void pat_init(void)
 	u64 pat;
 	bool boot_cpu = !boot_pat_state;
 
-	if (!pat_enabled)
+	if (!pat_enabled())
 		return;
 
 	if (!cpu_has_pat) {
@@ -402,7 +399,7 @@ int reserve_memtype(u64 start, u64 end, enum page_cache_mode req_type,
 
 	BUG_ON(start >= end); /* end is exclusive */
 
-	if (!pat_enabled) {
+	if (!pat_enabled()) {
 		/* This is identical to page table setting without PAT */
 		if (new_type) {
 			if (req_type == _PAGE_CACHE_MODE_WC)
@@ -477,7 +474,7 @@ int free_memtype(u64 start, u64 end)
 	int is_range_ram;
 	struct memtype *entry;
 
-	if (!pat_enabled)
+	if (!pat_enabled())
 		return 0;
 
 	/* Low ISA region is always mapped WB. No need to track */
@@ -625,7 +622,7 @@ static inline int range_is_allowed(unsigned long pfn, unsigned long size)
 	u64 to = from + size;
 	u64 cursor = from;
 
-	if (!pat_enabled)
+	if (!pat_enabled())
 		return 1;
 
 	while (cursor < to) {
@@ -661,7 +658,7 @@ int phys_mem_access_prot_allowed(struct file *file, unsigned long pfn,
 	 * caching for the high addresses through the KEN pin, but
 	 * we maintain the tradition of paranoia in this code.
 	 */
-	if (!pat_enabled &&
+	if (!pat_enabled() &&
 	    !(boot_cpu_has(X86_FEATURE_MTRR) ||
 	      boot_cpu_has(X86_FEATURE_K6_MTRR) ||
 	      boot_cpu_has(X86_FEATURE_CYRIX_ARR) ||
@@ -730,7 +727,7 @@ static int reserve_pfn_range(u64 paddr, unsigned long size, pgprot_t *vma_prot,
 	 * the type requested matches the type of first page in the range.
 	 */
 	if (is_ram) {
-		if (!pat_enabled)
+		if (!pat_enabled())
 			return 0;
 
 		pcm = lookup_memtype(paddr);
@@ -844,7 +841,7 @@ int track_pfn_remap(struct vm_area_struct *vma, pgprot_t *prot,
 		return ret;
 	}
 
-	if (!pat_enabled)
+	if (!pat_enabled())
 		return 0;
 
 	/*
@@ -872,7 +869,7 @@ int track_pfn_insert(struct vm_area_struct *vma, pgprot_t *prot,
 {
 	enum page_cache_mode pcm;
 
-	if (!pat_enabled)
+	if (!pat_enabled())
 		return 0;
 
 	/* Set prot based on lookup */
@@ -913,7 +910,7 @@ void untrack_pfn(struct vm_area_struct *vma, unsigned long pfn,
 
 pgprot_t pgprot_writecombine(pgprot_t prot)
 {
-	if (pat_enabled)
+	if (pat_enabled())
 		return __pgprot(pgprot_val(prot) |
 				cachemode2protval(_PAGE_CACHE_MODE_WC));
 	else
@@ -996,7 +993,7 @@ static const struct file_operations memtype_fops = {
 
 static int __init pat_memtype_list_init(void)
 {
-	if (pat_enabled) {
+	if (pat_enabled()) {
 		debugfs_create_file("pat_memtype_list", S_IRUSR,
 				    arch_debugfs_dir, NULL, &memtype_fops);
 	}
diff --git a/arch/x86/pci/i386.c b/arch/x86/pci/i386.c
index 349c0d32cc0b..0a9f2caf358f 100644
--- a/arch/x86/pci/i386.c
+++ b/arch/x86/pci/i386.c
@@ -429,12 +429,12 @@ int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
  	 * Caller can followup with UC MINUS request and add a WC mtrr if there
  	 * is a free mtrr slot.
  	 */
-	if (!pat_enabled && write_combine)
+	if (!pat_enabled() && write_combine)
 		return -EINVAL;
 
-	if (pat_enabled && write_combine)
+	if (pat_enabled() && write_combine)
 		prot |= cachemode2protval(_PAGE_CACHE_MODE_WC);
-	else if (pat_enabled || boot_cpu_data.x86 > 3)
+	else if (pat_enabled() || boot_cpu_data.x86 > 3)
 		/*
 		 * ioremap() and ioremap_nocache() defaults to UC MINUS for now.
 		 * To avoid attribute conflicts, request UC MINUS here
-- 
1.9.0.258.g00eda23


  parent reply index

Thread overview: 400+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-05-26  8:28 [PATCH 00/18] tip queue 2015-05-26 Borislav Petkov
2015-05-26  8:28 ` [PATCH 01/18] x86/kconfig: Simplify conditions for HAVE_ARCH_HUGE_VMAP Borislav Petkov
2015-05-27 14:17   ` [tip:x86/mm] x86/mm/kconfig: " tip-bot for Toshi Kani
2015-05-26  8:28 ` [PATCH 02/18] x86/mtrr: Fix MTRR lookup to handle an inclusive entry Borislav Petkov
2015-05-27 14:18   ` [tip:x86/mm] x86/mm/mtrr: " tip-bot for Toshi Kani
2015-05-26  8:28 ` [PATCH 03/18] x86/mtrr: Fix MTRR state checks in mtrr_type_lookup() Borislav Petkov
2015-05-27 14:18   ` [tip:x86/mm] x86/mm/mtrr: " tip-bot for Toshi Kani
2015-05-26  8:28 ` [PATCH 04/18] x86/mtrr: Use symbolic define as a retval for disabled MTRRs Borislav Petkov
2015-05-27 14:18   ` [tip:x86/mm] x86/mm/mtrr: " tip-bot for Toshi Kani
2015-05-26  8:28 ` [PATCH 05/18] x86/mtrr: Clean up mtrr_type_lookup() Borislav Petkov
2015-05-27 14:19   ` [tip:x86/mm] x86/mm/mtrr: " tip-bot for Toshi Kani
2015-07-31 13:18     ` Peter Zijlstra
2015-07-31 14:44       ` Borislav Petkov
2015-07-31 15:08         ` Peter Zijlstra
2015-07-31 15:27           ` Borislav Petkov
2015-08-01 14:28             ` Luis R. Rodriguez
2015-08-01 16:33               ` Borislav Petkov
2015-08-01 16:39                 ` Linus Torvalds
2015-08-01 16:49                   ` Borislav Petkov
2015-08-01 17:03                     ` Linus Torvalds
2015-05-26  8:28 ` [PATCH 06/18] x86/process: Drop repeated word from comment Borislav Petkov
2015-05-27 14:16   ` [tip:sched/core] sched/x86: Drop repeated word from mwait_idle() comment tip-bot for Huang Rui
2015-05-26  8:28 ` [PATCH 07/18] x86/mm: Enhance MTRR checks in kernel mapping helpers Borislav Petkov
2015-05-27 14:19   ` [tip:x86/mm] x86/mm/mtrr: " tip-bot for Toshi Kani
2015-05-26  8:28 ` [PATCH 08/18] x86/mm/pat: Convert to pr_* usage Borislav Petkov
2015-05-27 14:19   ` [tip:x86/mm] x86/mm/pat: Convert to pr_*() usage tip-bot for Luis R. Rodriguez
2015-05-26  8:28 ` [PATCH 09/18] x86: Document Write Combining MTRR type effects on PAT / non-PAT pages Borislav Petkov
2015-05-27 14:19   ` [tip:x86/mm] x86/mm/mtrr, pat: " tip-bot for Luis R. Rodriguez
2015-05-26  8:28 ` [PATCH 10/18] x86/mtrr: Avoid ifdeffery with phys_wc_to_mtrr_index() Borislav Petkov
2015-05-27 14:20   ` [tip:x86/mm] x86/mm/mtrr: Avoid #ifdeffery " tip-bot for Luis R. Rodriguez
2015-05-26  8:28 ` [PATCH 11/18] x86/mtrr: Generalize runtime disabling of MTRRs Borislav Petkov
2015-05-27 14:20   ` [tip:x86/mm] x86/mm/mtrr: " tip-bot for Luis R. Rodriguez
2015-05-26  8:28 ` Borislav Petkov [this message]
2015-05-27 14:20   ` [tip:x86/mm] x86/mm/pat: Wrap pat_enabled into a function API tip-bot for Luis R. Rodriguez
2015-05-26  8:28 ` [PATCH 13/18] x86/mm/pat: Export pat_enabled() Borislav Petkov
2015-05-27 14:21   ` [tip:x86/mm] " tip-bot for Luis R. Rodriguez
2015-05-26  8:28 ` [PATCH 14/18] x86/cpu: Strip any /proc/cpuinfo model name field whitespace Borislav Petkov
2015-05-27 14:16   ` [tip:x86/cpu] x86/cpu: Strip any /proc/ cpuinfo " tip-bot for Prarit Bhargava
2015-05-27 17:07     ` Joe Perches
2015-05-27 19:06       ` Borislav Petkov
2015-05-27 19:16         ` Joe Perches
2015-05-28 11:27           ` Prarit Bhargava
2015-05-28 11:32             ` Borislav Petkov
2015-05-28 12:58               ` Borislav Petkov
2015-05-28 16:57                 ` H. Peter Anvin
2015-05-28 18:33                   ` Borislav Petkov
2015-05-28 20:39                     ` H. Peter Anvin
2015-05-26  8:28 ` [PATCH 15/18] x86/documentation: Move kernel-stacks doc one level up Borislav Petkov
2015-05-27 14:17   ` [tip:x86/debug] x86/Documentation: " tip-bot for Borislav Petkov
2015-05-26  8:28 ` [PATCH 16/18] x86/documentation: Remove STACKFAULT_STACK bulletpoint Borislav Petkov
2015-05-27 14:17   ` [tip:x86/debug] x86/Documentation: " tip-bot for Borislav Petkov
2015-05-26  8:28 ` [PATCH 17/18] x86/documentation: Adapt Ingo's explanation on printing backtraces Borislav Petkov
2015-05-26  8:28 ` [PATCH 18/18] x86/mce: Fix monarch timeout setting through the mce= cmdline option Borislav Petkov
2015-06-07 17:39   ` [tip:x86/core] " tip-bot for Xie XiuQi
  -- strict thread matches above, loose matches on Subject: below --
2015-05-20 11:22 [PATCH] mce: fix fail to set 'monarchtimeout' via boot option Xie XiuQi
2015-05-20 17:43 ` Borislav Petkov
2015-05-21  1:00   ` Xie XiuQi
2015-05-19 15:43 [PATCH] x86, cpuinfo x86_model_id whitespace cleanup Prarit Bhargava
2015-05-19 16:56 ` Borislav Petkov
2015-05-19 17:25 ` Brian Gerst
2015-05-19 18:13   ` Borislav Petkov
2015-05-19 18:44     ` Andy Lutomirski
2015-05-19 19:22       ` Borislav Petkov
2015-05-19 20:16         ` Andy Lutomirski
2015-05-19 20:26           ` Joe Perches
2015-05-19 20:28             ` Joe Perches
2015-05-19 20:31           ` Borislav Petkov
2015-05-19 22:17             ` Prarit Bhargava
2015-05-27 17:18         ` H. Peter Anvin
2015-05-20  6:34 ` Ingo Molnar
2015-05-20 10:15   ` Prarit Bhargava
2015-06-02  8:42 ` [tip:x86/cpu] x86/cpu: Trim model ID whitespace tip-bot for Borislav Petkov
2015-05-19  8:01 [RFC PATCH 0/4] x86, mwaitt: introduce AMD mwaitt support Huang Rui
2015-05-19  8:01 ` [RFC PATCH 1/4] x86, mwaitt: add monitorx and mwaitx instruction Huang Rui
2015-05-19 11:29   ` Borislav Petkov
2015-05-21  8:54     ` Huang Rui
2015-05-21  9:35       ` Borislav Petkov
2015-05-19  8:01 ` [RFC PATCH 2/4] x86, mwaitt: introduce mwaitx idle with a configurable timer Huang Rui
2015-05-19 11:31   ` Borislav Petkov
2015-05-20  8:55     ` Ingo Molnar
2015-05-20  9:12       ` Borislav Petkov
2015-05-20 10:22         ` Ingo Molnar
2015-05-20 10:50           ` Borislav Petkov
2015-05-20 11:11             ` Ingo Molnar
2015-05-20 11:21               ` Borislav Petkov
2015-05-20 11:41                 ` Ingo Molnar
2015-05-20 13:20                   ` Thomas Gleixner
2015-05-20 14:51                     ` Ingo Molnar
2015-05-20 15:55                       ` One Thousand Gnomes
2015-05-20 16:07                         ` Borislav Petkov
2015-05-20 19:12                           ` Thomas Gleixner
2015-05-20 20:15                             ` Borislav Petkov
2015-05-21 14:56                               ` Huang Rui
2015-05-21 16:02                                 ` Borislav Petkov
2015-05-21 16:45                                   ` Andy Lutomirski
2015-05-21 17:08                                     ` Borislav Petkov
2015-05-21 17:12                                       ` Andy Lutomirski
2015-05-21 19:30                                   ` Thomas Gleixner
2015-05-21 14:32                 ` Huang Rui
2015-05-25  2:42               ` Huang Rui
2015-05-25 10:43                 ` Ingo Molnar
2015-05-21 14:15         ` Huang Rui
2015-05-21 13:26     ` Huang Rui
2015-05-21  1:34   ` Andy Lutomirski
2015-05-21  5:48     ` Andy Lutomirski
2015-05-27  1:01       ` Andy Lutomirski
2015-05-27 11:30         ` Borislav Petkov
2015-05-21  9:41     ` Thomas Gleixner
2015-05-19  8:01 ` [RFC PATCH 3/4] x86, mwaitt: add document to describe mwaitx Huang Rui
2015-05-19  8:01 ` [RFC PATCH 4/4] x86, mwait: fix redundant comment Huang Rui
2015-05-19  9:40   ` Borislav Petkov
2015-05-19  8:57 ` [RFC PATCH 0/4] x86, mwaitt: introduce AMD mwaitt support Borislav Petkov
2015-05-19  9:44   ` Huang Rui
2015-05-18 16:34 [PATCH v4 0/3] Compile-time stack frame pointer validation Josh Poimboeuf
2015-05-18 16:34 ` [PATCH v4 1/3] x86, stackvalidate: " Josh Poimboeuf
2015-05-18 16:34 ` [PATCH v4 2/3] x86: Make push/pop CFI macros arch-independent Josh Poimboeuf
2015-05-18 16:34 ` [PATCH v4 3/3] x86, stackvalidate: Add asm frame pointer setup macros Josh Poimboeuf
2015-05-20 10:33 ` [PATCH v4 0/3] Compile-time stack frame pointer validation Ingo Molnar
2015-05-20 14:13   ` Josh Poimboeuf
2015-05-20 14:48     ` Ingo Molnar
2015-05-20 15:51       ` Josh Poimboeuf
2015-05-20 16:09         ` Josh Poimboeuf
2015-05-20 16:03       ` Andy Lutomirski
2015-05-20 16:25         ` Josh Poimboeuf
2015-05-20 16:39           ` Andy Lutomirski
2015-05-20 16:52           ` Borislav Petkov
2015-05-21 10:16             ` Ingo Molnar
2015-05-21 10:47               ` Borislav Petkov
2015-05-21 11:11                 ` Ingo Molnar
2015-05-21 15:49                   ` [PATCH 1/3] x86/documentation: Move kernel-stacks doc one level up Borislav Petkov
2015-05-21 15:49                     ` [PATCH 2/3] x86/documentation: Remove STACKFAULT_STACK bulletpoint Borislav Petkov
2015-05-21 15:49                     ` [PATCH 3/3] x86/documentation: Adapt Ingo's explanation on printing backtraces Borislav Petkov
2015-05-27 14:17               ` [tip:x86/debug] x86/Documentation: Adapt Ingo' s " tip-bot for Borislav Petkov
2015-05-20 16:59           ` [PATCH v4 0/3] Compile-time stack frame pointer validation Linus Torvalds
2015-05-20 17:20             ` Josh Poimboeuf
2015-05-21 10:27               ` Ingo Molnar
2015-05-21  7:52             ` Ingo Molnar
2015-05-21 12:12               ` Ingo Molnar
2015-05-26 23:06               ` Andi Kleen
2015-05-20 17:27         ` Peter Zijlstra
2015-05-20 19:10           ` Jiri Kosina
2015-05-21 20:54       ` Josh Poimboeuf
2015-05-21 21:53         ` Andy Lutomirski
2015-05-22 14:53           ` Josh Poimboeuf
2015-05-21 22:01         ` Borislav Petkov
2015-05-22 14:32           ` Josh Poimboeuf
2015-05-22 21:18             ` Jiri Kosina
2015-05-22 22:22               ` Josh Poimboeuf
2015-05-23  8:37             ` Borislav Petkov
2015-05-15 18:23 [PATCH v5 0/6] mtrr, mm, x86: Enhance MTRR checks for huge I/O mapping Toshi Kani
2015-05-15 18:23 ` [PATCH v5 1/6] mm, x86: Simplify conditions of HAVE_ARCH_HUGE_VMAP Toshi Kani
2015-05-17  8:30   ` Borislav Petkov
2015-05-15 18:23 ` [PATCH v5 2/6] mtrr, x86: Fix MTRR lookup to handle inclusive entry Toshi Kani
2015-05-15 18:23 ` [PATCH v5 3/6] mtrr, x86: Fix MTRR state checks in mtrr_type_lookup() Toshi Kani
2015-05-15 18:23 ` [PATCH v5 4/6] mtrr, x86: Define MTRR_TYPE_INVALID for mtrr_type_lookup() Toshi Kani
2015-05-15 18:23 ` [PATCH v5 5/6] mtrr, x86: Clean up mtrr_type_lookup() Toshi Kani
2015-05-15 18:23 ` [PATCH v5 6/6] mtrr, mm, x86: Enhance MTRR checks for KVA huge page mapping Toshi Kani
2015-05-18 13:33   ` Borislav Petkov
2015-05-18 17:22     ` Toshi Kani
2015-05-18 19:01       ` Borislav Petkov
2015-05-18 19:31         ` Toshi Kani
2015-05-18 20:01           ` Borislav Petkov
2015-05-18 20:21             ` Toshi Kani
2015-05-18 20:51               ` Borislav Petkov
2015-05-18 21:53                 ` Toshi Kani
2015-05-19 11:44                   ` Borislav Petkov
2015-05-19 13:23                     ` Borislav Petkov
2015-05-19 13:47                       ` Toshi Kani
2015-05-20 11:55                       ` Ingo Molnar
2015-05-20 14:34                         ` Toshi Kani
2015-05-20 15:01                           ` Ingo Molnar
2015-05-20 15:02                             ` Toshi Kani
2015-05-20 16:04                               ` Borislav Petkov
2015-05-20 15:46                                 ` Toshi Kani
2015-05-11  8:15 [0/8] tip queue 2015-05-11 Borislav Petkov
2015-05-11  8:15 ` [PATCH] x86/alternatives: Switch AMD F15h and later to the P6 NOPs Borislav Petkov
2015-05-11 12:44   ` [tip:x86/asm] " tip-bot for Borislav Petkov
2015-05-11  8:15 ` [PATCH] x86/cpu/microcode: Zap changelog Borislav Petkov
2015-05-11 12:45   ` [tip:x86/microcode] " tip-bot for Borislav Petkov
2015-05-11  8:15 ` [PATCH] x86/kaslr: Fix typo in KASLR_FLAG documentation Borislav Petkov
2015-05-11 12:45   ` [tip:x86/boot] x86/kaslr: Fix typo in the " tip-bot for Miroslav Benes
2015-05-11  8:15 ` [PATCH 1/5] x86/mm: Do not flush last cacheline twice in clflush_cache_range() Borislav Petkov
2015-05-11 12:45   ` [tip:x86/mm] " tip-bot for Ross Zwisler
2015-05-11  8:15 ` [PATCH] x86/vdso: Add arch/x86/include/uapi include path to HOST_EXTRACFLAGS Borislav Petkov
2015-05-11  8:15 ` [PATCH 2/5] x86/mm: Add kerneldoc comments for pcommit_sfence() Borislav Petkov
2015-05-11 12:45   ` [tip:x86/mm] " tip-bot for Ross Zwisler
2015-05-11  8:15 ` [PATCH 3/5] x86/MTRR: Remove wrong address check in __mtrr_type_lookup() Borislav Petkov
2015-05-11 12:46   ` [tip:x86/mm] x86/mm/mtrr: Remove incorrect " tip-bot for Toshi Kani
2015-05-11  8:15 ` [PATCH 4/5] x86/mm: Add ioremap_uc() helper to map memory uncacheable (not UC-) Borislav Petkov
2015-05-11 12:46   ` [tip:x86/mm] " tip-bot for Luis R. Rodriguez
2015-05-06 16:54 tools: Consolidate types.h Oleg Nesterov
2015-05-06 17:17 ` Borislav Petkov
2015-05-06 17:30   ` Oleg Nesterov
2015-05-06 17:37     ` Borislav Petkov
2015-05-07  2:53       ` Andy Lutomirski
2015-05-07 16:58         ` [PATCH 0/1] x86/vdso: add -Iarch/x86/include/uapi into HOST_EXTRACFLAGS Oleg Nesterov
2015-05-07 16:58           ` [PATCH 1/1] " Oleg Nesterov
2015-05-07 19:46             ` Andy Lutomirski
2015-05-07 21:55               ` Borislav Petkov
2015-05-11 12:44             ` [tip:x86/urgent] x86/vdso: Fix 'make bzImage' on older distros tip-bot for Oleg Nesterov
2015-04-30 20:25 [PATCH v5 0/6] x86: address drivers that do not work with PAT Luis R. Rodriguez
2015-04-30 20:25 ` [PATCH v5 1/6] x86/mm/pat: use pr_info() and friends Luis R. Rodriguez
2015-05-04 14:58   ` Borislav Petkov
2015-05-07  3:36   ` Elliott, Robert (Server Storage)
2015-05-14 15:55     ` Luis R. Rodriguez
2015-04-30 20:25 ` [PATCH v5 2/6] x86/mm/pat: redefine pat_enabled Luis R. Rodriguez
2015-05-04 15:22   ` Borislav Petkov
2015-05-05  0:42     ` Luis R. Rodriguez
2015-04-30 20:25 ` [PATCH v5 3/6] arch/x86/mm/pat: export pat_enabled() Luis R. Rodriguez
2015-05-04 15:29   ` Borislav Petkov
2015-04-30 20:25 ` [PATCH v5 4/6] ivtv: use arch_phys_wc_add() and require PAT disabled Luis R. Rodriguez
2015-04-30 20:25 ` [PATCH v5 5/6] IB/ipath: add counting for MTRR Luis R. Rodriguez
2015-04-30 20:25 ` [PATCH v5 6/6] IB/ipath: use arch_phys_wc_add() and require PAT disabled Luis R. Rodriguez
2015-04-29 21:44 [PATCH v4 0/6] x86: document and address MTRR corner cases Luis R. Rodriguez
2015-04-29 21:44 ` [PATCH v4 1/6] x86: add ioremap_uc() - force strong UC, PCD=1, PWT=1 Luis R. Rodriguez
2015-04-30 10:18   ` Borislav Petkov
2015-04-29 21:44 ` [PATCH v4 2/6] x86: document WC MTRR effects on PAT / non-PAT pages Luis R. Rodriguez
2015-04-30 22:01   ` Randy Dunlap
2015-05-05  0:45     ` Luis R. Rodriguez
2015-05-05  7:22       ` Borislav Petkov
2015-05-05  7:46         ` Luis R. Rodriguez
2015-05-05  7:53           ` Borislav Petkov
2015-05-05  7:31     ` Luis R. Rodriguez
2015-05-04 12:23   ` Borislav Petkov
2015-05-05  7:35     ` Luis R. Rodriguez
2015-04-29 21:44 ` [PATCH v4 3/6] video: fbdev: atyfb: move framebuffer length fudging to helper Luis R. Rodriguez
2015-04-29 21:44 ` [PATCH v4 4/6] video: fbdev: atyfb: clarify ioremap() base and length used Luis R. Rodriguez
2015-04-29 21:44 ` [PATCH v4 5/6] video: fbdev: atyfb: replace MTRR UC hole with strong UC Luis R. Rodriguez
2015-04-29 21:44 ` [PATCH v4 6/6] video: fbdev: atyfb: use arch_phys_wc_add() and ioremap_wc() Luis R. Rodriguez
2015-05-20 19:53   ` Luis R. Rodriguez
2015-05-20 20:57     ` Luis R. Rodriguez
2015-06-03 23:50 ` [PATCH v4 0/6] x86: document and address MTRR corner cases Luis R. Rodriguez
2015-06-08 23:43   ` Luis R. Rodriguez
2015-06-16 19:31     ` Luis R. Rodriguez
2015-06-19 22:22       ` Luis R. Rodriguez
2015-06-25  1:24         ` Luis R. Rodriguez
2015-06-25  6:59           ` Ingo Molnar
2015-06-25 16:41             ` Luis R. Rodriguez
2015-04-28 22:46 [PATCH v2] x86: Add kerneldoc for pcommit_sfence() Ross Zwisler
2015-04-29 14:23 ` Borislav Petkov
2015-04-28 22:13 [PATCH] x86: improve algorithm in clflush_cache_range Ross Zwisler
2015-04-29 10:28 ` Borislav Petkov
2015-04-22 17:12 [PATCH v4] mtrr: avoid ifdef'ery with phys_wc_to_mtrr_index() Luis R. Rodriguez
2015-04-14 11:35 [PATCH] x86/kaslr: Fix typo in documentation Miroslav Benes
2015-04-14 11:37 ` Borislav Petkov
2015-03-24 22:08 [PATCH v4 0/7] mtrr, mm, x86: Enhance MTRR checks for huge I/O mapping Toshi Kani
2015-03-24 22:08 ` [PATCH v4 1/7] mm, x86: Document return values of mapping funcs Toshi Kani
2015-05-05 11:19   ` Borislav Petkov
2015-05-05 13:46     ` Toshi Kani
2015-05-05 14:19       ` Borislav Petkov
2015-05-05 14:14         ` Toshi Kani
2015-03-24 22:08 ` [PATCH v4 2/7] mtrr, x86: Fix MTRR lookup to handle inclusive entry Toshi Kani
2015-05-05 17:11   ` Borislav Petkov
2015-05-05 17:32     ` Toshi Kani
2015-05-05 18:39       ` Borislav Petkov
2015-05-05 19:31         ` Toshi Kani
2015-05-05 20:09           ` Borislav Petkov
2015-05-05 20:06             ` Toshi Kani
2015-03-24 22:08 ` [PATCH v4 3/7] mtrr, x86: Remove a wrong address check in __mtrr_type_lookup() Toshi Kani
2015-05-06 10:46   ` Borislav Petkov
2015-03-24 22:08 ` [PATCH v4 4/7] mtrr, x86: Fix MTRR state checks in mtrr_type_lookup() Toshi Kani
2015-05-06 11:47   ` Borislav Petkov
2015-05-06 15:23     ` Toshi Kani
2015-05-06 22:39       ` Borislav Petkov
2015-05-06 23:08         ` Toshi Kani
2015-03-24 22:08 ` [PATCH v4 5/7] mtrr, x86: Define MTRR_TYPE_INVALID for mtrr_type_lookup() Toshi Kani
2015-03-24 22:08 ` [PATCH v4 6/7] mtrr, x86: Clean up mtrr_type_lookup() Toshi Kani
2015-05-06 13:41   ` Borislav Petkov
2015-05-06 16:00     ` Toshi Kani
2015-05-06 22:49       ` Borislav Petkov
2015-05-06 23:42         ` Toshi Kani
2015-05-07  7:52           ` Borislav Petkov
2015-05-07 13:45             ` Toshi Kani
2015-03-24 22:08 ` [PATCH v4 7/7] mtrr, mm, x86: Enhance MTRR checks for KVA huge page mapping Toshi Kani
2015-05-09  9:08   ` Borislav Petkov
2015-05-11 19:25     ` Toshi Kani
2015-05-11 20:18       ` Borislav Petkov
2015-05-11 20:38         ` Toshi Kani
2015-05-11 21:42           ` Borislav Petkov
2015-05-11 22:09             ` Toshi Kani
2015-05-12  7:28               ` Borislav Petkov
2015-05-12 14:30                 ` Toshi Kani
2015-05-12 16:31                   ` Borislav Petkov
2015-05-12 16:57                     ` Toshi Kani
2015-03-24 22:43 ` [PATCH v4 0/7] mtrr, mm, x86: Enhance MTRR checks for huge I/O mapping Andrew Morton
2015-04-03  6:33   ` Ingo Molnar
2015-04-03 15:22     ` Toshi Kani
2015-04-27 14:31       ` Toshi Kani
2015-03-20 23:17 [PATCH v1 00/47] mtrr/x86/drivers: bury MTRR Luis R. Rodriguez
2015-03-20 23:17 ` [PATCH v1 01/47] x86: mtrr: annotate mtrr_type_lookup() is only implemented on generic_mtrr_ops Luis R. Rodriguez
2015-03-20 23:17 ` [PATCH v1 02/47] x86: mtrr: generalize run time disabling of MTRR Luis R. Rodriguez
2015-03-25 19:59   ` Konrad Rzeszutek Wilk
2015-03-26  4:38     ` Juergen Gross
2015-03-26 23:35     ` Luis R. Rodriguez
2015-04-02 20:13       ` Bjorn Helgaas
2015-04-02 20:20         ` Luis R. Rodriguez
2015-04-02 20:28           ` Bjorn Helgaas
2015-04-02 21:02             ` Luis R. Rodriguez
2015-04-02 22:09               ` Bjorn Helgaas
2015-04-02 22:12                 ` [Xen-devel] " Luis R. Rodriguez
2015-03-27 20:40   ` Toshi Kani
2015-03-27 23:56     ` Luis R. Rodriguez
2015-04-02 21:49       ` Luis R. Rodriguez
2015-04-02 23:52         ` Toshi Kani
2015-04-03  1:08           ` Luis R. Rodriguez
2015-03-20 23:17 ` [PATCH v1 03/47] devres: add devm_ioremap_wc() Luis R. Rodriguez
2015-03-20 23:49   ` Andy Lutomirski
2015-03-25 19:50     ` Luis R. Rodriguez
2015-03-20 23:17 ` [PATCH v1 04/47] pci: add pci_ioremap_wc_bar() Luis R. Rodriguez
2015-03-20 23:50   ` Andy Lutomirski
2015-03-25 20:06     ` Luis R. Rodriguez
2015-03-25 20:03   ` [Xen-devel] " Konrad Rzeszutek Wilk
2015-03-25 20:39     ` Luis R. Rodriguez
2015-03-20 23:17 ` [PATCH v1 05/47] pci: add pci_iomap_wc() variants Luis R. Rodriguez
2015-03-23 17:20   ` Bjorn Helgaas
2015-03-26  3:00     ` Luis R. Rodriguez
2015-04-21 17:52       ` Luis R. Rodriguez
2015-04-21 18:46         ` Michael S. Tsirkin
2015-03-27 19:18     ` Toshi Kani
2015-04-21 19:25     ` Michael S. Tsirkin
2015-04-21 19:27       ` Luis R. Rodriguez
2015-03-25 20:07   ` Konrad Rzeszutek Wilk
2015-03-27 18:40     ` Luis R. Rodriguez
2015-03-20 23:17 ` [PATCH v1 06/47] mtrr: add __arch_phys_wc_add() Luis R. Rodriguez
2015-03-20 23:48   ` Andy Lutomirski
2015-03-27 19:53     ` Luis R. Rodriguez
2015-03-27 19:58       ` Andy Lutomirski
2015-03-27 20:30         ` Luis R. Rodriguez
2015-03-27 21:23           ` Andy Lutomirski
2015-03-27 23:04             ` Luis R. Rodriguez
2015-03-27 23:10               ` Andy Lutomirski
2015-03-27 23:33                 ` Luis R. Rodriguez
2015-04-02 20:21   ` Bjorn Helgaas
2015-04-02 20:55     ` Luis R. Rodriguez
2015-04-02 22:35       ` Bjorn Helgaas
2015-04-02 22:54         ` Luis R. Rodriguez
2015-03-20 23:17 ` [PATCH v1 07/47] video: fbdev: atyfb: move framebuffer length fudging to helper Luis R. Rodriguez
2015-03-20 23:17 ` [PATCH v1 08/47] video: fbdev: atyfb: clarify ioremap() base and length used Luis R. Rodriguez
2015-03-20 23:17 ` [PATCH v1 09/47] vidoe: fbdev: atyfb: remove and fix MTRR MMIO "hole" work around Luis R. Rodriguez
2015-03-20 23:52   ` Andy Lutomirski
2015-03-27 20:12     ` Luis R. Rodriguez
2015-03-27 21:21       ` Andy Lutomirski
2015-03-27 23:31         ` Luis R. Rodriguez
2015-03-21  9:15   ` Ville Syrjälä
2015-03-27  8:37     ` Ville Syrjälä
2015-03-27 19:38       ` Luis R. Rodriguez
2015-03-27 19:38     ` Luis R. Rodriguez
2015-03-27 19:43       ` Andy Lutomirski
2015-03-27 19:57         ` Luis R. Rodriguez
2015-03-27 21:56           ` Ville Syrjälä
2015-03-27 22:02             ` Andy Lutomirski
2015-03-28  0:28               ` Luis R. Rodriguez
2015-03-28 12:23                 ` Ville Syrjälä
2015-04-01 23:52                   ` Luis R. Rodriguez
2015-04-02  0:04                     ` Andy Lutomirski
2015-04-02 19:45                       ` Luis R. Rodriguez
2015-04-02 19:50                         ` Andy Lutomirski
2015-03-28  0:21             ` Luis R. Rodriguez
2015-03-20 23:18 ` [PATCH v1 10/47] video: fbdev: atyfb: use arch_phys_wc_add() and ioremap_wc() Luis R. Rodriguez
2015-03-20 23:18 ` [PATCH v1 11/47] IB/qib: add acounting for MTRR Luis R. Rodriguez
2015-03-20 23:18 ` [PATCH v1 12/47] IB/qib: use arch_phys_wc_add() Luis R. Rodriguez
2015-03-20 23:18 ` [PATCH v1 13/47] IB/ipath: add counting for MTRR Luis R. Rodriguez
2015-03-20 23:18 ` [PATCH v1 14/47] IB/ipath: use __arch_phys_wc_add() Luis R. Rodriguez
2015-03-20 23:18 ` [PATCH v1 15/47] [media] media: ivtv: " Luis R. Rodriguez
2015-03-20 23:18 ` [PATCH v1 16/47] fusion: " Luis R. Rodriguez
2015-03-20 23:18 ` [PATCH v1 17/47] video: fbdev: vesafb: only support MTRR_TYPE_WRCOMB Luis R. Rodriguez
2015-03-20 23:18 ` [PATCH v1 18/47] vidoe: fbdev: vesafb: add missing mtrr_del() for added MTRR Luis R. Rodriguez
2015-03-20 23:18 ` [PATCH v1 19/47] video: fbdev: vesafb: use arch_phys_wc_add() Luis R. Rodriguez
2015-03-20 23:18 ` [PATCH v1 20/47] mtrr: avoid ifdef'ery with phys_wc_to_mtrr_index() Luis R. Rodriguez
2015-03-20 23:18 ` [PATCH v1 21/47] ethernet: myri10ge: use arch_phys_wc_add() Luis R. Rodriguez
2015-03-21  7:08   ` Hyong-Youb Kim
2015-03-27 20:36     ` Luis R. Rodriguez
2015-03-20 23:18 ` [PATCH v1 22/47] staging: sm750fb: use arch_phys_wc_add() and ioremap_wc() Luis R. Rodriguez
2015-03-20 23:18 ` [PATCH v1 23/47] staging: xgifb: " Luis R. Rodriguez
2015-04-30 17:40   ` Luis R. Rodriguez
2015-03-20 23:18 ` [PATCH v1 24/47] video: fbdev: arkfb: use arch_phys_wc_add() and pci_iomap_wc() Luis R. Rodriguez
2015-03-20 23:18 ` [PATCH v1 25/47] video: fbdev: radeonfb: use arch_phys_wc_add() and ioremap_wc() Luis R. Rodriguez
2015-03-20 23:18 ` [PATCH v1 26/47] video: fbdev: gbefb: add missing mtrr_del() calls Luis R. Rodriguez
2015-03-20 23:18 ` [PATCH v1 27/47] video: fbdev: gbefb: use arch_phys_wc_add() and devm_ioremap_wc() Luis R. Rodriguez
2015-03-20 23:18 ` [PATCH v1 28/47] video: fbdev: intelfb: use arch_phys_wc_add() and ioremap_wc() Luis R. Rodriguez
2015-03-20 23:18 ` [PATCH v1 29/47] video: fbdev: matrox: " Luis R. Rodriguez
2015-03-20 23:18 ` [PATCH v1 30/47] video: fbdev: neofb: " Luis R. Rodriguez
2015-03-20 23:18 ` [PATCH v1 31/47] video: fbdev: s3fb: use arch_phys_wc_add() and pci_iomap_wc() Luis R. Rodriguez
2015-03-20 23:18 ` [PATCH v1 32/47] video: fbdev: nvidia: use arch_phys_wc_add() and ioremap_wc() Luis R. Rodriguez
2015-03-20 23:18 ` [PATCH v1 33/47] video: fbdev: savagefb: " Luis R. Rodriguez
2015-03-20 23:18 ` [PATCH v1 34/47] video: fbdev: sisfb: " Luis R. Rodriguez
2015-03-20 23:18 ` [PATCH v1 35/47] video: fbdev: aty: " Luis R. Rodriguez
2015-03-20 23:18 ` [PATCH v1 36/47] video: fbdev: i810: " Luis R. Rodriguez
2015-03-20 23:18 ` [PATCH v1 37/47] video: fbdev: i740fb: use arch_phys_wc_add() and pci_ioremap_wc_bar() Luis R. Rodriguez
2015-03-20 23:18 ` [PATCH v1 38/47] video: fbdev: kyrofb: " Luis R. Rodriguez
2015-03-20 23:18 ` [PATCH v1 39/47] video: fbdev: pm2fb: use arch_phys_wc_add() and ioremap_wc() Luis R. Rodriguez
2015-03-20 23:18 ` [PATCH v1 40/47] video: fbdev: pm3fb: " Luis R. Rodriguez
2015-03-20 23:18 ` [PATCH v1 41/47] video: fbdev: rivafb: " Luis R. Rodriguez
2015-03-20 23:18 ` [PATCH v1 42/47] video: fbdev: tdfxfb: " Luis R. Rodriguez
2015-03-20 23:18 ` [PATCH v1 43/47] video: fbdev: vt8623fb: use arch_phys_wc_add() and pci_iomap_wc() Luis R. Rodriguez
2015-03-20 23:18 ` [PATCH v1 44/47] video: fbdev: atmel_lcdfb: use ioremap_wc() for framebuffer Luis R. Rodriguez
2015-03-20 23:18 ` [PATCH v1 45/47] video: fbdev: geode gxfb: " Luis R. Rodriguez
2015-03-20 23:18 ` [PATCH v1 46/47] video: fbdev: gxt4500: use pci_ioremap_wc_bar() " Luis R. Rodriguez
2015-03-20 23:18 ` [PATCH v1 47/47] mtrr: bury MTRR - unexport mtrr_add() and mtrr_del() Luis R. Rodriguez
2015-03-21  1:08 ` [PATCH v1 00/47] mtrr/x86/drivers: bury MTRR Andy Lutomirski

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