From: Borislav Petkov <bp@alien8.de>
To: Ashish Kalra <Ashish.Kalra@amd.com>
Cc: tglx@kernel.org, mingo@redhat.com, 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,
ackerleytng@google.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,
darwi@linutronix.de, linux-kernel@vger.kernel.org,
linux-crypto@vger.kernel.org, kvm@vger.kernel.org,
linux-coco@lists.linux.dev
Subject: Re: [PATCH v5 1/7] x86/cpufeatures: Add X86_FEATURE_AMD_RMPOPT feature flag
Date: Wed, 27 May 2026 13:17:10 -0700 [thread overview]
Message-ID: <20260527201710.GAahdRRoHFOor425im@fat_crate.local> (raw)
In-Reply-To: <305b625c0528f16a95542001c66e643fbd3a2622.1779133590.git.ashish.kalra@amd.com>
On Mon, May 18, 2026 at 09:41:53PM +0000, Ashish Kalra wrote:
> From: Ashish Kalra <ashish.kalra@amd.com>
>
> Add a flag indicating whether RMPOPT instruction is supported.
>
> RMPOPT is a new instruction designed to minimize the performance
> overhead of RMP checks on the hypervisor and on non-SNP guests by
> allowing RMP checks to be skipped when 1G regions of memory are known
> not to contain any SEV-SNP guest memory.
Streamline:
"RMPOPT is a new instruction that reduces the performance overhead of RMP
checks for the hypervisor and non‑SNP guests by allowing those checks to be
skipped when 1‑GB memory regions are known to contain no SEV‑SNP guest
memory."
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
next prev parent reply other threads:[~2026-05-27 20:18 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-18 21:41 [PATCH v5 0/7] Add RMPOPT support Ashish Kalra
2026-05-18 21:41 ` [PATCH v5 1/7] x86/cpufeatures: Add X86_FEATURE_AMD_RMPOPT feature flag Ashish Kalra
2026-05-27 20:17 ` Borislav Petkov [this message]
2026-05-18 21:42 ` [PATCH v5 2/7] x86/msr: add wrmsrq_on_cpus helper Ashish Kalra
2026-05-18 22:04 ` Dave Hansen
2026-05-18 22:09 ` Kalra, Ashish
2026-05-18 22:38 ` Dave Hansen
2026-05-27 21:06 ` Borislav Petkov
2026-05-27 21:38 ` Dave Hansen
2026-05-28 0:43 ` Borislav Petkov
2026-05-28 19:37 ` Kalra, Ashish
2026-05-28 19:50 ` Dave Hansen
2026-05-28 19:55 ` Kalra, Ashish
2026-05-29 0:26 ` Borislav Petkov
2026-05-29 0:29 ` Kalra, Ashish
2026-05-18 21:42 ` [PATCH v5 3/7] x86/sev: Initialize RMPOPT configuration MSRs Ashish Kalra
2026-05-18 21:42 ` [PATCH v5 4/7] x86/sev: Add support to perform RMP optimizations asynchronously Ashish Kalra
2026-05-28 14:45 ` Ackerley Tng
2026-05-28 23:52 ` Kalra, Ashish
2026-06-01 18:03 ` Kalra, Ashish
2026-05-18 21:43 ` [PATCH v5 5/7] x86/sev: Add interface to re-enable RMP optimizations Ashish Kalra
2026-05-18 21:43 ` [PATCH v5 6/7] KVM: SEV: Perform RMP optimizations on SNP guest shutdown Ashish Kalra
2026-05-18 21:43 ` [PATCH v5 7/7] x86/sev: Add debugfs support for RMPOPT Ashish Kalra
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