[PATCH] x86/spectre_v2: Remove 0xc2 from spectre_bad_microcodes

[PATCH] x86/spectre_v2: Remove 0xc2 from spectre_bad_microcodes

[Darren Kenny]

According to the latest microcode update from Intel (on Feb 8, 2018) on
Skylake we should be using the microcode revisions 0xC2***, so we need
to remove that from the blacklist now.

Signed-off-by: Darren Kenny <darren.kenny@oracle.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Tested-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
 arch/x86/kernel/cpu/intel.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c
index 319bf98..276bfe2 100644
--- a/arch/x86/kernel/cpu/intel.c
+++ b/arch/x86/kernel/cpu/intel.c
@@ -123,8 +123,6 @@ static const struct sku_microcode spectre_bad_microcodes[] = {
 	{ INTEL_FAM6_KABYLAKE_MOBILE,	0x09,	0x84 },
 	{ INTEL_FAM6_SKYLAKE_X,		0x03,	0x0100013e },
 	{ INTEL_FAM6_SKYLAKE_X,		0x04,	0x0200003c },
-	{ INTEL_FAM6_SKYLAKE_MOBILE,	0x03,	0xc2 },
-	{ INTEL_FAM6_SKYLAKE_DESKTOP,	0x03,	0xc2 },
 	{ INTEL_FAM6_BROADWELL_CORE,	0x04,	0x28 },
 	{ INTEL_FAM6_BROADWELL_GT3E,	0x01,	0x1b },
 	{ INTEL_FAM6_BROADWELL_XEON_D,	0x02,	0x14 },
-- 
2.9.5

Re: [PATCH] x86/spectre_v2: Remove 0xc2 from spectre_bad_microcodes

[David Woodhouse]

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On Fri, 2018-02-09 at 14:10 +0000, Darren Kenny wrote:
> According to the latest microcode update from Intel (on Feb 8, 2018) on
> Skylake we should be using the microcode revisions 0xC2***, so we need
> to remove that from the blacklist now.

The doc also suggests that Gemini Lake 0x22 is also now known to be OK.
I'll do a full pass over it and bring the list completely up to date.

Thanks.

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Re: [PATCH] x86/spectre_v2: Remove 0xc2 from spectre_bad_microcodes

[Darren Kenny]

On Fri, Feb 09, 2018 at 02:29:27PM +0000, David Woodhouse wrote:
>On Fri, 2018-02-09 at 14:10 +0000, Darren Kenny wrote:
>> According to the latest microcode update from Intel (on Feb 8, 2018) on
>> Skylake we should be using the microcode revisions 0xC2***, so we need
>> to remove that from the blacklist now.
>
>The doc also suggests that Gemini Lake 0x22 is also now known to be OK.
>I'll do a full pass over it and bring the list completely up to date.
>
>Thanks.

OK, let me know if you need me to do anything.

Thanks,

Darren.