Messages in this thread Patch in this message | | | From | Len Brown <> | Subject | [PATCH 1/1] x86/apic: Future-proof TSC_DEADLINE quirk for SKX | Date | Sat, 21 Jul 2018 17:19:19 -0400 |
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From: Len Brown <len.brown@intel.com>
All SKX with stepping higher than 4 support the TSC_DEADLINE, no matter the microcode version.
Fixes: 616dd5872e ("x86/apic: Update TSC_DEADLINE quirk with additional SKX stepping")
Signed-off-by: Len Brown <len.brown@intel.com> --- Without this patch, upcoming SKX steppings will not be able to use their TSC_DEADLINE timer.
arch/x86/kernel/apic/apic.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c index b203af0855b5..5caf8890fbe4 100644 --- a/arch/x86/kernel/apic/apic.c +++ b/arch/x86/kernel/apic/apic.c @@ -573,6 +573,9 @@ static u32 skx_deadline_rev(void) case 0x04: return 0x02000014; } + if (boot_cpu_data.x86_stepping > 4) + return 0; + return ~0U; } -- 2.18.0-rc0
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