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Darwish" To: Ashish Kalra Cc: tglx@kernel.org, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, seanjc@google.com, peterz@infradead.org, thomas.lendacky@amd.com, herbert@gondor.apana.org.au, davem@davemloft.net, ardb@kernel.org, pbonzini@redhat.com, aik@amd.com, Michael.Roth@amd.com, KPrateek.Nayak@amd.com, Tycho.Andersen@amd.com, Nathan.Fontenot@amd.com, jackyli@google.com, pgonda@google.com, rientjes@google.com, jacobhxu@google.com, xin@zytor.com, pawan.kumar.gupta@linux.intel.com, babu.moger@amd.com, dyoung@redhat.com, nikunj@amd.com, john.allen@amd.com, linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org, kvm@vger.kernel.org, linux-coco@lists.linux.dev Subject: Re: [PATCH 1/6] x86/cpufeatures: Add X86_FEATURE_AMD_RMPOPT feature flag Message-ID: References: <6e004cd8c4deb4660bc5887309fc64aece0a5b25.1771321114.git.ashish.kalra@amd.com> Precedence: bulk X-Mailing-List: linux-coco@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <6e004cd8c4deb4660bc5887309fc64aece0a5b25.1771321114.git.ashish.kalra@amd.com> On Tue, 17 Feb 2026, Ashish Kalra wrote: > > --- a/arch/x86/kernel/cpu/scattered.c > +++ b/arch/x86/kernel/cpu/scattered.c > @@ -65,6 +65,7 @@ static const struct cpuid_bit cpuid_bits[] = { > { X86_FEATURE_PERFMON_V2, CPUID_EAX, 0, 0x80000022, 0 }, > { X86_FEATURE_AMD_LBR_V2, CPUID_EAX, 1, 0x80000022, 0 }, > { X86_FEATURE_AMD_LBR_PMC_FREEZE, CPUID_EAX, 2, 0x80000022, 0 }, > + { X86_FEATURE_RMPOPT, CPUID_EDX, 0, 0x80000025, 0 }, > { X86_FEATURE_AMD_HTR_CORES, CPUID_EAX, 30, 0x80000026, 0 }, > { 0, 0, 0, 0, 0 } CPUID(0x80000025).EDX is documented as reserved in the latest public version of the APM, volume 3 (2025-07-02.) I'll add it to the upcoming x86-cpuid-db release: https://gitlab.com/x86-cpuid.org/x86-cpuid-db Thanks, -- Ahmed S. Darwish Linutronix GmbH