From: Andi Kleen Date: Fri, 24 Aug 2018 17:03:51 +0000 (-0700) Subject: x86/spectre: Add missing family 6 check to microcode check X-Git-Tag: v5.15~8032^2~21 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=1ab534e85c93945f7862378d8c8adcf408205b19;p=platform%2Fkernel%2Flinux-starfive.git x86/spectre: Add missing family 6 check to microcode check The check for Spectre microcodes does not check for family 6, only the model numbers. Add a family 6 check to avoid ambiguity with other families. Fixes: a5b296636453 ("x86/cpufeature: Blacklist SPEC_CTRL/PRED_CMD on early Spectre v2 microcodes") Signed-off-by: Andi Kleen Signed-off-by: Thomas Gleixner Cc: x86@kernel.org Cc: linux-kernel@vger.kernel.org Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/20180824170351.34874-2-andi@firstfloor.org --- diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c index 401e8c1..fc3c07f 100644 --- a/arch/x86/kernel/cpu/intel.c +++ b/arch/x86/kernel/cpu/intel.c @@ -150,6 +150,9 @@ static bool bad_spectre_microcode(struct cpuinfo_x86 *c) if (cpu_has(c, X86_FEATURE_HYPERVISOR)) return false; + if (c->x86 != 6) + return false; + for (i = 0; i < ARRAY_SIZE(spectre_bad_microcodes); i++) { if (c->x86_model == spectre_bad_microcodes[i].model && c->x86_stepping == spectre_bad_microcodes[i].stepping)