From: Greg KH <gregkh@suse.de>
To: linux-kernel@vger.kernel.org, stable@kernel.org
Cc: stable-review@kernel.org, torvalds@linux-foundation.org,
akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk,
Boris Ostrovsky <Boris.Ostrovsky@amd.com>,
Andreas Herrmann <andreas.herrmann3@amd.com>,
Greg Kroah-Hartman <greg@kroah.com>,
Hans Rosenfeld <hans.rosenfeld@amd.com>,
Nick Bowler <nbowler@elliptictech.com>,
Joerg-Volker-Peetz <jvpeetz@web.de>,
Borislav Petkov <borislav.petkov@amd.com>,
Ingo Molnar <mingo@elte.hu>
Subject: [14/21] x86, AMD: Fix ARAT feature setting again
Date: Thu, 19 May 2011 11:23:44 -0700 [thread overview]
Message-ID: <20110519182437.669844622@clark.kroah.org> (raw)
In-Reply-To: <20110519182446.GA23751@kroah.com>
2.6.32-longterm review patch. If anyone has any objections, please let us know.
------------------
From: Borislav Petkov <borislav.petkov@amd.com>
commit 14fb57dccb6e1defe9f89a66f548fcb24c374c1d upstream.
Trying to enable the local APIC timer on early K8 revisions
uncovers a number of other issues with it, in conjunction with
the C1E enter path on AMD. Fixing those causes much more churn
and troubles than the benefit of using that timer brings so
don't enable it on K8 at all, falling back to the original
functionality the kernel had wrt to that.
Reported-and-bisected-by: Nick Bowler <nbowler@elliptictech.com>
Cc: Boris Ostrovsky <Boris.Ostrovsky@amd.com>
Cc: Andreas Herrmann <andreas.herrmann3@amd.com>
Cc: Greg Kroah-Hartman <greg@kroah.com>
Cc: Hans Rosenfeld <hans.rosenfeld@amd.com>
Cc: Nick Bowler <nbowler@elliptictech.com>
Cc: Joerg-Volker-Peetz <jvpeetz@web.de>
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Link: http://lkml.kernel.org/r/1305636919-31165-3-git-send-email-bp@amd64.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
arch/x86/kernel/cpu/amd.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -568,7 +568,7 @@ static void __cpuinit init_amd(struct cp
#endif
/* As a rule processors have APIC timer running in deep C states */
- if (c->x86 >= 0xf && !cpu_has_amd_erratum(amd_erratum_400))
+ if (c->x86 > 0xf && !cpu_has_amd_erratum(amd_erratum_400))
set_cpu_cap(c, X86_FEATURE_ARAT);
/*
next prev parent reply other threads:[~2011-05-19 18:25 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-19 18:24 [00/21] 2.6.32.41-longterm review Greg KH
2011-05-19 18:23 ` [01/21] cifs: check for bytes_remaining going to zero in CIFS_SessSetup Greg KH
2011-05-19 18:23 ` [02/21] Validate size of EFI GUID partition entries Greg KH
2011-05-19 18:23 ` [03/21] dccp: handle invalid feature options length Greg KH
2011-05-19 18:23 ` [04/21] CIFS: Fix memory over bound bug in cifs_parse_mount_options Greg KH
2011-05-19 18:23 ` [05/21] Fix time() inconsistencies caused by intermediate xtime_cache values being read Greg KH
2011-05-19 20:33 ` [Stable-review] " Ben Hutchings
2011-05-19 18:23 ` [06/21] ehea: fix wrongly reported speed and port Greg KH
2011-05-19 18:23 ` [07/21] NET: slip, fix ldisc->open retval Greg KH
2011-05-19 18:23 ` [08/21] ne-h8300: Fix regression caused during net_device_ops conversion Greg KH
2011-05-19 18:23 ` [09/21] hydra: " Greg KH
2011-05-19 18:23 ` [10/21] libertas: fix cmdpendingq locking Greg KH
2011-05-19 18:23 ` [11/21] zorro8390: Fix regression caused during net_device_ops conversion Greg KH
2011-05-19 18:23 ` [12/21] cifs: add fallback in is_path_accessible for old servers Greg KH
2011-05-19 18:23 ` [13/21] Revert "x86, AMD: Fix APIC timer erratum 400 affecting K8 Rev.A-E processors" Greg KH
2011-05-19 18:23 ` Greg KH [this message]
2011-05-19 18:23 ` [15/21] clocksource: Install completely before selecting Greg KH
2011-05-19 18:23 ` [16/21] tick: Clear broadcast active bit when switching to oneshot Greg KH
2011-05-19 18:23 ` [17/21] x86, apic: Fix spurious error interrupts triggering on all non-boot APs Greg KH
2011-05-19 18:23 ` [18/21] x86, mce, AMD: Fix leaving freed data in a list Greg KH
2011-05-19 18:23 ` [19/21] [SCSI] megaraid_sas: Sanity check user supplied length before passing it to dma_alloc_coherent() Greg KH
2011-05-19 18:23 ` [20/21] vmxnet3: Fix inconsistent LRO state after initialization Greg KH
2011-05-19 18:23 ` [21/21] netxen: Remove references to unified firmware file Greg KH
2011-05-19 18:30 ` [01/24] cifs: check for bytes_remaining going to zero in CIFS_SessSetup Greg KH
2011-05-19 18:30 ` [02/24] Validate size of EFI GUID partition entries Greg KH
2011-05-19 18:30 ` [03/24] x86, hw_breakpoints: Fix racy access to ptrace breakpoints Greg KH
2011-05-19 18:30 ` [04/24] ptrace: Prepare to fix racy accesses on task breakpoints Greg KH
2011-05-19 18:30 ` [05/24] dccp: handle invalid feature options length Greg KH
2011-05-19 18:30 ` [06/24] CIFS: Fix memory over bound bug in cifs_parse_mount_options Greg KH
2011-05-19 18:30 ` [07/24] tmpfs: fix race between umount and swapoff Greg KH
2011-05-21 4:52 ` Hugh Dickins
2011-05-19 18:30 ` [08/24] ehea: fix wrongly reported speed and port Greg KH
2011-05-19 18:30 ` [09/24] NET: slip, fix ldisc->open retval Greg KH
2011-05-19 18:30 ` [10/24] ne-h8300: Fix regression caused during net_device_ops conversion Greg KH
2011-05-19 18:30 ` [11/24] hydra: " Greg KH
2011-05-19 18:30 ` [12/24] libertas: fix cmdpendingq locking Greg KH
2011-05-19 18:30 ` [13/24] zorro8390: Fix regression caused during net_device_ops conversion Greg KH
2011-05-19 18:30 ` [14/24] fixes for using make 3.82 Greg KH
2011-05-19 18:30 ` [15/24] tmpfs: fix spurious ENOSPC when racing with unswap Greg KH
2011-05-20 17:49 ` Hugh Dickins
2011-05-21 21:49 ` Greg KH
2011-05-22 0:15 ` Hugh Dickins
2011-05-19 18:30 ` [16/24] cifs: add fallback in is_path_accessible for old servers Greg KH
2011-05-19 18:30 ` [17/24] Revert "x86, AMD: Fix APIC timer erratum 400 affecting K8 Rev.A-E processors" Greg KH
2011-05-19 18:30 ` [18/24] x86, AMD: Fix ARAT feature setting again Greg KH
2011-05-19 18:30 ` [19/24] clocksource: Install completely before selecting Greg KH
2011-05-19 18:30 ` [20/24] tick: Clear broadcast active bit when switching to oneshot Greg KH
2011-05-19 18:30 ` [21/24] x86, apic: Fix spurious error interrupts triggering on all non-boot APs Greg KH
2011-05-19 18:30 ` [22/24] x86, mce, AMD: Fix leaving freed data in a list Greg KH
2011-05-19 18:30 ` [23/24] [SCSI] megaraid_sas: Sanity check user supplied length before passing it to dma_alloc_coherent() Greg KH
2011-05-19 18:30 ` [24/24] vmxnet3: Fix inconsistent LRO state after initialization Greg KH
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