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From: Sohil Mehta <sohil.mehta@intel.com>
To: Dave Hansen <dave.hansen@linux.intel.com>,
	Borislav Petkov <bp@alien8.de>,
	x86@kernel.org
Cc: Thomas Gleixner <tglx@kernel.org>, Ingo Molnar <mingo@redhat.com>,
	"H . Peter Anvin" <hpa@zytor.com>,
	Pawan Gupta <pawan.kumar.gupta@linux.intel.com>,
	Dave Hansen <dave.hansen@intel.com>,
	Tony Luck <tony.luck@intel.com>,
	Sohil Mehta <sohil.mehta@intel.com>,
	linux-kernel@vger.kernel.org
Subject: [PATCH] x86/bugs: Replace RFDS model checks with VFM ones
Date: Fri, 30 Oct 2026 12:52:14 -0700	[thread overview]
Message-ID: <20261030195214.1284995-1-sohil.mehta@intel.com> (raw)

The RFDS vulnerability check uses raw model numbers to identify Alder
Lake and Raptor Lake. Most Intel-specific code has already moved away
from x86_model checks, but this one got added recently.

Replace the x86_model checks with VFM ones to make them more readable.

Signed-off-by: Sohil Mehta <sohil.mehta@intel.com>
---
 arch/x86/kernel/cpu/common.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index c7352827f491..8d7bd8bb7b18 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -1392,8 +1392,8 @@ static bool __init vulnerable_to_rfds(u64 x86_arch_cap_msr)
 	 * both Core and Atom CPUs. Mark unaffected when Atom CPUs are not
 	 * present.
 	 */
-	if ((boot_cpu_data.x86_model == 0x97 ||
-	     boot_cpu_data.x86_model == 0xB7) &&
+	if ((boot_cpu_data.x86_vfm == INTEL_ALDERLAKE ||
+	     boot_cpu_data.x86_vfm == INTEL_RAPTORLAKE) &&
 	     boot_cpu_data.topo.intel_type != INTEL_CPU_TYPE_ATOM &&
 	     !boot_cpu_has(X86_FEATURE_HYBRID_CPU))
 		return false;
-- 
2.43.0


             reply	other threads:[~2026-10-30 19:54 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-10-30 19:52 Sohil Mehta [this message]
2026-10-30 21:50 ` Pawan Gupta
2026-10-31  4:20 ` Borislav Petkov
2026-11-02  3:56 ` [tip: x86/urgent] " tip-bot2 for Sohil Mehta
2026-11-02  4:31 ` [tip: x86/cleanups] " tip-bot2 for Sohil Mehta

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