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authorSuravee Suthikulpanit <suravee.suthikulpanit@amd.com>2010-09-29 19:27:12 -0500
committerIngo Molnar <mingo@kernel.org>2013-09-27 09:29:27 +0200
commitaccd1e823ed1d5980106dd522a4c535084400830 (patch)
tree41ba0d90082906c79f42f00f47018ac8837188d0 /arch/x86
parent654fdd041227d7de1594baa61c58f2c87bd0640f (diff)
downloadlinux-accd1e823ed1d5980106dd522a4c535084400830.tar.bz2
x86/microcode/AMD: Fix patch level reporting for family 15h
On AMD family 14h, applying microcode patch on the a core (core0) would also affect the other core (core1) in the same compute unit. The driver would skip applying the patch on core1, but it still need to update kernel structures to reflect the proper patch level. The current logic is not updating the struct ucode_cpu_info.cpu_sig.rev of the skipped core. This causes the /sys/devices/system/cpu/cpu1/microcode/version to report incorrect patch level as shown below: $ grep . cpu?/microcode/version cpu0/microcode/version:0x600063d cpu1/microcode/version:0x6000626 cpu2/microcode/version:0x600063d cpu3/microcode/version:0x6000626 cpu4/microcode/version:0x600063d Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> Acked-by: Borislav Petkov <bp@suse.de> Cc: <bp@alien8.de> Cc: <jacob.w.shin@gmail.com> Cc: <herrmann.der.user@googlemail.com> Link: http://lkml.kernel.org/r/1285806432-1995-1-git-send-email-suravee.suthikulpanit@amd.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/kernel/microcode_amd.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/kernel/microcode_amd.c b/arch/x86/kernel/microcode_amd.c
index 7123b5df479d..af99f71aeb7f 100644
--- a/arch/x86/kernel/microcode_amd.c
+++ b/arch/x86/kernel/microcode_amd.c
@@ -216,6 +216,7 @@ int apply_microcode_amd(int cpu)
/* need to apply patch? */
if (rev >= mc_amd->hdr.patch_id) {
c->microcode = rev;
+ uci->cpu_sig.rev = rev;
return 0;
}