[arch-commits] Commit in linux/trunk (PKGBUILD fix_CPU0_microcode_on_resume.patch)

[Evangelos Foutras]

    Date: Sunday, December 7, 2014 @ 08:55:17
  Author: foutrelis
Revision: 227331

upgpkg: linux 3.17.5-1

- New upstream release.
- Limit the microcode reloading to 64-bit for now (FS#42689, FS#42820).

Modified:
  linux/trunk/PKGBUILD
  linux/trunk/fix_CPU0_microcode_on_resume.patch

------------------------------------+
 PKGBUILD                           |    8 ++---
 fix_CPU0_microcode_on_resume.patch |   56 +++++++++++++++++++++++++++++++----
 2 files changed, 55 insertions(+), 9 deletions(-)

Modified: PKGBUILD
===================================================================
--- PKGBUILD	2014-12-06 20:45:50 UTC (rev 227330)
+++ PKGBUILD	2014-12-07 07:55:17 UTC (rev 227331)
@@ -5,8 +5,8 @@
 pkgbase=linux               # Build stock -ARCH kernel
 #pkgbase=linux-custom       # Build kernel with a different name
 _srcname=linux-3.17
-pkgver=3.17.4
-pkgrel=2
+pkgver=3.17.5
+pkgrel=1
 arch=('i686' 'x86_64')
 url="http://www.kernel.org/"
 license=('GPL2')
@@ -22,12 +22,12 @@
         'fix_CPU0_microcode_on_resume.patch'
         )
 sha256sums=('f5153ec93c5fcd41b247950e6a9bcbc63fa87beafd112c133a622439a0f76251'
-            'eeef37397a15245bd143569908be40622a87dc7673965e623e811ea3f68b8434'
+            '435a8a3c4faad53b5f9f0349629358a7d273e6ca94ffeb226c1d360787cc7278'
             'ea9de72fe335055f6e8eebd1d85cad150a47a81004bb27d78f18f2591fd3bbd5'
             '66fc95823d3c99167532f37c07e9582d305961103997fcc61cfc7f6a86b34130'
             'f0d90e756f14533ee67afda280500511a62465b4f76adcc5effa95a40045179c'
             '1256b241cd477b265a3c2d64bdc19ffe3c9bbcee82ea3994c590c2c76e767d99'
-            '4eb64c2520e9bcdff47d757946011b4bf9896186d285361f18364c7ff9b2c699')
+            'fa48f83498bbef85dbe4b39eb88f89aac4dd2591232a3f13ec029fc44b0f497a')
 
 _kernelname=${pkgbase#linux}
 

Modified: fix_CPU0_microcode_on_resume.patch
===================================================================
--- fix_CPU0_microcode_on_resume.patch	2014-12-06 20:45:50 UTC (rev 227330)
+++ fix_CPU0_microcode_on_resume.patch	2014-12-07 07:55:17 UTC (rev 227331)
@@ -1,7 +1,7 @@
 From fb86b97300d930b57471068720c52bfa8622eab7 Mon Sep 17 00:00:00 2001
 From: Borislav Petkov <bp at suse.de>
 Date: Tue, 18 Nov 2014 10:46:57 +0100
-Subject: [PATCH] x86, microcode: Update BSPs microcode on resume
+Subject: x86, microcode: Update BSPs microcode on resume
 
 In the situation when we apply early microcode but do *not* apply late
 microcode, we fail to update the BSP's microcode on resume because we
@@ -18,9 +18,6 @@
 Signed-off-by: Borislav Petkov <bp at suse.de>
 Link: http://lkml.kernel.org/r/20141118094657.GA6635@pd.tnic
 Signed-off-by: Thomas Gleixner <tglx at linutronix.de>
----
- arch/x86/kernel/cpu/microcode/core.c | 8 ++++++++
- 1 file changed, 8 insertions(+)
 
 diff --git a/arch/x86/kernel/cpu/microcode/core.c b/arch/x86/kernel/cpu/microcode/core.c
 index dd9d619..2ce9051 100644
@@ -42,5 +39,54 @@
  
  static struct syscore_ops mc_syscore_ops = {
 -- 
-2.1.3
+cgit v0.10.1
 
+From 02ecc41abcea4ff9291d548f6f846b29b354ddd2 Mon Sep 17 00:00:00 2001
+From: Borislav Petkov <bp at suse.de>
+Date: Sun, 30 Nov 2014 14:26:39 +0100
+Subject: x86, microcode: Limit the microcode reloading to 64-bit for now
+
+First, there was this: https://bugzilla.kernel.org/show_bug.cgi?id=88001
+
+The problem there was that microcode patches are not being reapplied
+after suspend-to-ram. It was important to reapply them, though, because
+of for example Haswell's TSX erratum which disabled TSX instructions
+with a microcode patch.
+
+A simple fix was fb86b97300d9 ("x86, microcode: Update BSPs microcode
+on resume") but, as it is often the case, simple fixes are too
+simple. This one causes 32-bit resume to fail:
+
+https://bugzilla.kernel.org/show_bug.cgi?id=88391
+
+Properly fixing this would require more involved changes for which it
+is too late now, right before the merge window. Thus, limit this to
+64-bit only temporarily.
+
+Signed-off-by: Borislav Petkov <bp at suse.de>
+Link: http://lkml.kernel.org/r/1417353999-32236-1-git-send-email-bp@alien8.de
+Signed-off-by: Thomas Gleixner <tglx at linutronix.de>
+
+diff --git a/arch/x86/kernel/cpu/microcode/core.c b/arch/x86/kernel/cpu/microcode/core.c
+index 2ce9051..08fe6e8 100644
+--- a/arch/x86/kernel/cpu/microcode/core.c
++++ b/arch/x86/kernel/cpu/microcode/core.c
+@@ -465,6 +465,7 @@ static void mc_bp_resume(void)
+ 
+ 	if (uci->valid && uci->mc)
+ 		microcode_ops->apply_microcode(cpu);
++#ifdef CONFIG_X86_64
+ 	else if (!uci->mc)
+ 		/*
+ 		 * We might resume and not have applied late microcode but still
+@@ -473,6 +474,7 @@ static void mc_bp_resume(void)
+ 		 * applying patches early on the APs.
+ 		 */
+ 		load_ucode_ap();
++#endif
+ }
+ 
+ static struct syscore_ops mc_syscore_ops = {
+-- 
+cgit v0.10.1
+