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Date: Fri, 27 Dec 2013 17:17:57 -0800
From: "H. Peter Anvin" <hpa@...ux.intel.com>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: <stable@...r.kernel.org>, "H. Peter Anvin" <hpa@...ux.intel.com>,
"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...e.hu>,
Ingo Molnar <mingo@...nel.org>,
Jan Beulich <jbeulich@...e.com>,
Len Brown <len.brown@...el.com>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Matt Fleming <matt.fleming@...el.com>,
Thomas Gleixner <tglx@...utronix.de>,
Tony Luck <tony.luck@...el.com>
Subject: [GIT PULL] x86 fixes for v3.13-rc6
Hi Linus,
The following changes since commit 319e2e3f63c348a9b66db4667efa73178e18b17d:
Linux 3.13-rc4 (2013-12-15 12:31:33 -0800)
are available in the git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86-urgent-for-linus
for you to fetch changes up to fce7d3bfc0ae70ca2a57868f2a9708b13185fd1f:
x86/efi: Don't select EFI from certain special ACPI drivers (2013-12-19 21:32:46 +0100)
There is a small EFI fix and a big power regression fix in this batch.
My queue also had a fix for downing a CPU when there are insufficient
number of IRQ vectors available, but I'm holding that one for now due
to recent bug reports.
----------------------------------------------------------------
Jan Beulich (1):
x86/efi: Don't select EFI from certain special ACPI drivers
Len Brown (1):
x86 idle: Repair large-server 50-watt idle-power regression
arch/x86/kernel/cpu/intel.c | 3 ++-
drivers/acpi/Kconfig | 1 -
drivers/acpi/apei/Kconfig | 1 -
drivers/firmware/Makefile | 1 +
drivers/firmware/efi/Kconfig | 6 +++---
drivers/firmware/efi/Makefile | 2 +-
drivers/idle/intel_idle.c | 3 +++
7 files changed, 10 insertions(+), 7 deletions(-)
diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c
index dc1ec0dff939..ea04b342c026 100644
--- a/arch/x86/kernel/cpu/intel.c
+++ b/arch/x86/kernel/cpu/intel.c
@@ -387,7 +387,8 @@ static void init_intel(struct cpuinfo_x86 *c)
set_cpu_cap(c, X86_FEATURE_PEBS);
}
- if (c->x86 == 6 && c->x86_model == 29 && cpu_has_clflush)
+ if (c->x86 == 6 && cpu_has_clflush &&
+ (c->x86_model == 29 || c->x86_model == 46 || c->x86_model == 47))
set_cpu_cap(c, X86_FEATURE_CLFLUSH_MONITOR);
#ifdef CONFIG_X86_64
diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index 5d9248526d78..4770de5707b9 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig
@@ -348,7 +348,6 @@ source "drivers/acpi/apei/Kconfig"
config ACPI_EXTLOG
tristate "Extended Error Log support"
depends on X86_MCE && X86_LOCAL_APIC
- select EFI
select UEFI_CPER
default n
help
diff --git a/drivers/acpi/apei/Kconfig b/drivers/acpi/apei/Kconfig
index 786294bb682c..3650b2183227 100644
--- a/drivers/acpi/apei/Kconfig
+++ b/drivers/acpi/apei/Kconfig
@@ -2,7 +2,6 @@ config ACPI_APEI
bool "ACPI Platform Error Interface (APEI)"
select MISC_FILESYSTEMS
select PSTORE
- select EFI
select UEFI_CPER
depends on X86
help
diff --git a/drivers/firmware/Makefile b/drivers/firmware/Makefile
index 299fad6b5867..5373dc5b6011 100644
--- a/drivers/firmware/Makefile
+++ b/drivers/firmware/Makefile
@@ -14,3 +14,4 @@ obj-$(CONFIG_FIRMWARE_MEMMAP) += memmap.o
obj-$(CONFIG_GOOGLE_FIRMWARE) += google/
obj-$(CONFIG_EFI) += efi/
+obj-$(CONFIG_UEFI_CPER) += efi/
diff --git a/drivers/firmware/efi/Kconfig b/drivers/firmware/efi/Kconfig
index 3150aa4874e8..6aecbc86ec94 100644
--- a/drivers/firmware/efi/Kconfig
+++ b/drivers/firmware/efi/Kconfig
@@ -36,7 +36,7 @@ config EFI_VARS_PSTORE_DEFAULT_DISABLE
backend for pstore by default. This setting can be overridden
using the efivars module's pstore_disable parameter.
-config UEFI_CPER
- def_bool n
-
endmenu
+
+config UEFI_CPER
+ bool
diff --git a/drivers/firmware/efi/Makefile b/drivers/firmware/efi/Makefile
index 9ba156d3c775..6c2a41ec21ba 100644
--- a/drivers/firmware/efi/Makefile
+++ b/drivers/firmware/efi/Makefile
@@ -1,7 +1,7 @@
#
# Makefile for linux kernel
#
-obj-y += efi.o vars.o
+obj-$(CONFIG_EFI) += efi.o vars.o
obj-$(CONFIG_EFI_VARS) += efivars.o
obj-$(CONFIG_EFI_VARS_PSTORE) += efi-pstore.o
obj-$(CONFIG_UEFI_CPER) += cper.o
diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c
index 92d1206482a6..f80b700f821c 100644
--- a/drivers/idle/intel_idle.c
+++ b/drivers/idle/intel_idle.c
@@ -377,6 +377,9 @@ static int intel_idle(struct cpuidle_device *dev,
if (!current_set_polling_and_test()) {
+ if (this_cpu_has(X86_FEATURE_CLFLUSH_MONITOR))
+ clflush((void *)¤t_thread_info()->flags);
+
__monitor((void *)¤t_thread_info()->flags, 0, 0);
smp_mb();
if (!need_resched())
--
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