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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 11/18] x86/mtrr: Generalize runtime disabling of MTRRs
Date: Tue, 26 May 2015 10:28:14 +0200
Message-ID: <1432628901-18044-12-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>

It is possible to enable CONFIG_MTRR and CONFIG_X86_PAT and end up with
a system with MTRR functionality disabled but PAT functionality enabled.
This can happen, for instance, when the Xen hypervisor is used where
MTRRs are not supported but PAT is. This can happen on Linux as of commit

  47591df50512 ("xen: Support Xen pv-domains using PAT")

by Juergen, introduced in v3.19.

Technically, we should assume the proper CPU bits would be set to
disable MTRRs but we can't always rely on this. At least on the Xen
Hypervisor, for instance, only X86_FEATURE_MTRR was disabled as of
Xen 4.4 through Xen commit 586ab6a [0], but not X86_FEATURE_K6_MTRR,
X86_FEATURE_CENTAUR_MCR, or X86_FEATURE_CYRIX_ARR for instance.

Roger Pau Monné has clarified though that although this is technically
true we will never support PVH on these CPU types so Xen has no need to
disable these bits on those systems. As per Roger, AMD K6, Centaur and
VIA chips don't have the necessary hardware extensions to allow running
PVH guests [1].

As per Toshi it is also possible for the BIOS to disable MTRR support,
in such cases get_mtrr_state() would update the MTRR state as per the
BIOS, we need to propagate this information as well.

x86 MTRR code relies on quite a bit of checks for mtrr_if being set to
check to see if MTRRs did get set up. Instead, lets provide a generic
getter for that. This also adds a few checks where they were not before
which could potentially safeguard ourselves against incorrect usage of
MTRR where this was not desirable.

Where possible match error codes as if MTRRs were disabled on
arch/x86/include/asm/mtrr.h.

Lastly, since disabling MTRRs can happen at run time and we could end up
with PAT enabled, best record now in our logs when MTRRs are disabled.

[0] ~/devel/xen (git::stable-4.5)$ git describe --contains 586ab6a 4.4.0-rc1~18
[1] http://lists.xenproject.org/archives/html/xen-devel/2015-03/msg03460.html

Signed-off-by: Luis R. Rodriguez <mcgrof@suse.com>
Cc: Roger Pau Monné <roger.pau@citrix.com>
Cc: Toshi Kani <toshi.kani@hp.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Suresh Siddha <sbsiddha@gmail.com>
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: Antonino Daplas <adaplas@gmail.com>
Cc: Jean-Christophe Plagniol-Villard <plagnioj@jcrosoft.com>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: venkatesh.pallipadi@intel.com
Cc: Stefan Bader <stefan.bader@canonical.com>
Cc: Ville Syrjälä <syrjala@sci.fi>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Davidlohr Bueso <dbueso@suse.de>
Cc: konrad.wilk@oracle.com
Cc: ville.syrjala@linux.intel.com
Cc: david.vrabel@citrix.com
Cc: jbeulich@suse.com
Cc: toshi.kani@hp.com
Cc: bhelgaas@google.com
Cc: xen-devel@lists.xensource.com
Link: http://lkml.kernel.org/r/1426893517-2511-3-git-send-email-mcgrof@do-not-panic.com
Signed-off-by: Borislav Petkov <bp@suse.de>
---
 arch/x86/kernel/cpu/mtrr/generic.c |  4 +++-
 arch/x86/kernel/cpu/mtrr/main.c    | 39 ++++++++++++++++++++++++++++++--------
 arch/x86/kernel/cpu/mtrr/mtrr.h    |  2 +-
 3 files changed, 35 insertions(+), 10 deletions(-)

diff --git a/arch/x86/kernel/cpu/mtrr/generic.c b/arch/x86/kernel/cpu/mtrr/generic.c
index f782d9b62cb3..3b533cf37c74 100644
--- a/arch/x86/kernel/cpu/mtrr/generic.c
+++ b/arch/x86/kernel/cpu/mtrr/generic.c
@@ -445,7 +445,7 @@ static void __init print_mtrr_state(void)
 }
 
 /* Grab all of the MTRR state for this CPU into *state */
-void __init get_mtrr_state(void)
+bool __init get_mtrr_state(void)
 {
 	struct mtrr_var_range *vrs;
 	unsigned long flags;
@@ -489,6 +489,8 @@ void __init get_mtrr_state(void)
 
 	post_set();
 	local_irq_restore(flags);
+
+	return !!(mtrr_state.enabled & MTRR_STATE_MTRR_ENABLED);
 }
 
 /* Some BIOS's are messed up and don't set all MTRRs the same! */
diff --git a/arch/x86/kernel/cpu/mtrr/main.c b/arch/x86/kernel/cpu/mtrr/main.c
index 81baf5fee0e1..383efb26e516 100644
--- a/arch/x86/kernel/cpu/mtrr/main.c
+++ b/arch/x86/kernel/cpu/mtrr/main.c
@@ -59,6 +59,12 @@
 #define MTRR_TO_PHYS_WC_OFFSET 1000
 
 u32 num_var_ranges;
+static bool __mtrr_enabled;
+
+static bool mtrr_enabled(void)
+{
+	return __mtrr_enabled;
+}
 
 unsigned int mtrr_usage_table[MTRR_MAX_VAR_RANGES];
 static DEFINE_MUTEX(mtrr_mutex);
@@ -286,7 +292,7 @@ int mtrr_add_page(unsigned long base, unsigned long size,
 	int i, replace, error;
 	mtrr_type ltype;
 
-	if (!mtrr_if)
+	if (!mtrr_enabled())
 		return -ENXIO;
 
 	error = mtrr_if->validate_add_page(base, size, type);
@@ -435,6 +441,8 @@ static int mtrr_check(unsigned long base, unsigned long size)
 int mtrr_add(unsigned long base, unsigned long size, unsigned int type,
 	     bool increment)
 {
+	if (!mtrr_enabled())
+		return -ENODEV;
 	if (mtrr_check(base, size))
 		return -EINVAL;
 	return mtrr_add_page(base >> PAGE_SHIFT, size >> PAGE_SHIFT, type,
@@ -463,8 +471,8 @@ int mtrr_del_page(int reg, unsigned long base, unsigned long size)
 	unsigned long lbase, lsize;
 	int error = -EINVAL;
 
-	if (!mtrr_if)
-		return -ENXIO;
+	if (!mtrr_enabled())
+		return -ENODEV;
 
 	max = num_var_ranges;
 	/* No CPU hotplug when we change MTRR entries */
@@ -523,6 +531,8 @@ int mtrr_del_page(int reg, unsigned long base, unsigned long size)
  */
 int mtrr_del(int reg, unsigned long base, unsigned long size)
 {
+	if (!mtrr_enabled())
+		return -ENODEV;
 	if (mtrr_check(base, size))
 		return -EINVAL;
 	return mtrr_del_page(reg, base >> PAGE_SHIFT, size >> PAGE_SHIFT);
@@ -548,7 +558,7 @@ int arch_phys_wc_add(unsigned long base, unsigned long size)
 {
 	int ret;
 
-	if (pat_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);
@@ -737,10 +747,12 @@ void __init mtrr_bp_init(void)
 	}
 
 	if (mtrr_if) {
+		__mtrr_enabled = true;
 		set_num_var_ranges();
 		init_table();
 		if (use_intel()) {
-			get_mtrr_state();
+			/* BIOS may override */
+			__mtrr_enabled = get_mtrr_state();
 
 			if (mtrr_cleanup(phys_addr)) {
 				changed_by_mtrr_cleanup = 1;
@@ -748,10 +760,16 @@ void __init mtrr_bp_init(void)
 			}
 		}
 	}
+
+	if (!mtrr_enabled())
+		pr_info("MTRR: Disabled\n");
 }
 
 void mtrr_ap_init(void)
 {
+	if (!mtrr_enabled())
+		return;
+
 	if (!use_intel() || mtrr_aps_delayed_init)
 		return;
 	/*
@@ -777,6 +795,9 @@ void mtrr_save_state(void)
 {
 	int first_cpu;
 
+	if (!mtrr_enabled())
+		return;
+
 	get_online_cpus();
 	first_cpu = cpumask_first(cpu_online_mask);
 	smp_call_function_single(first_cpu, mtrr_save_fixed_ranges, NULL, 1);
@@ -785,6 +806,8 @@ void mtrr_save_state(void)
 
 void set_mtrr_aps_delayed_init(void)
 {
+	if (!mtrr_enabled())
+		return;
 	if (!use_intel())
 		return;
 
@@ -796,7 +819,7 @@ void set_mtrr_aps_delayed_init(void)
  */
 void mtrr_aps_init(void)
 {
-	if (!use_intel())
+	if (!use_intel() || !mtrr_enabled())
 		return;
 
 	/*
@@ -813,7 +836,7 @@ void mtrr_aps_init(void)
 
 void mtrr_bp_restore(void)
 {
-	if (!use_intel())
+	if (!use_intel() || !mtrr_enabled())
 		return;
 
 	mtrr_if->set_all();
@@ -821,7 +844,7 @@ void mtrr_bp_restore(void)
 
 static int __init mtrr_init_finialize(void)
 {
-	if (!mtrr_if)
+	if (!mtrr_enabled())
 		return 0;
 
 	if (use_intel()) {
diff --git a/arch/x86/kernel/cpu/mtrr/mtrr.h b/arch/x86/kernel/cpu/mtrr/mtrr.h
index df5e41f31a27..951884dcc433 100644
--- a/arch/x86/kernel/cpu/mtrr/mtrr.h
+++ b/arch/x86/kernel/cpu/mtrr/mtrr.h
@@ -51,7 +51,7 @@ void set_mtrr_prepare_save(struct set_mtrr_context *ctxt);
 
 void fill_mtrr_var_range(unsigned int index,
 		u32 base_lo, u32 base_hi, u32 mask_lo, u32 mask_hi);
-void get_mtrr_state(void);
+bool get_mtrr_state(void);
 
 extern void set_mtrr_ops(const struct mtrr_ops *ops);
 
-- 
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 ` Borislav Petkov [this message]
2015-05-27 14:20   ` [tip:x86/mm] x86/mm/mtrr: Generalize runtime disabling of MTRRs tip-bot for Luis R. Rodriguez
2015-05-26  8:28 ` [PATCH 12/18] x86/mm/pat: Wrap pat_enabled Borislav Petkov
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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