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Peter Anvin" , Pawan Gupta , Dave Hansen , Tony Luck , linux-kernel@vger.kernel.org Subject: Re: [PATCH] x86/bugs: Replace RFDS model checks with VFM ones Message-ID: <20261031042008.GJauVseM2X4-dye4ra@fat_crate.local> References: <20261030195214.1284995-1-sohil.mehta@intel.com> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20261030195214.1284995-1-sohil.mehta@intel.com> On Fri, Oct 30, 2026 at 12:52:14PM -0700, Sohil Mehta wrote: > 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 > --- > 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; > -- Queued, thx. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette