From: "Kalra, Ashish" <ashish.kalra@amd.com>
To: Borislav Petkov <bp@alien8.de>
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 v10 0/6] Add RMPOPT support.
Date: Mon, 20 Jul 2026 15:39:35 -0500 [thread overview]
Message-ID: <e8d015c0-1aa4-4406-b668-23aa5813030a@amd.com> (raw)
In-Reply-To: <20260720202845.GAal6E_dQjTa_vEO3y@fat_crate.local>
Hello Boris,
On 7/20/2026 3:28 PM, Borislav Petkov wrote:
> On Mon, Jul 20, 2026 at 03:17:23PM -0500, Kalra, Ashish wrote:
>> Just a gentle ping on this series. I believe v10 addresses the feedback from the earlier rounds.
>> Please let me know if it looks good to merge, or if there's anything else you'd like me to change.
>
> What about those Sashiko comments to it:
>
> https://sashiko.dev/#/patchset/cover.1782841284.git.ashish.kalra%40amd.com
>
> ?
>
The three Sashiko comments on v10 all resolved to no code change, with rationale posted inline:
1. Suspend/resume vs. hotplug disable (patch 3): pre-existing base-SNP behavior — an SNP host doesn't support suspend/resume anyway (SnpEn is set once before
SNP_INIT and can't be rebuilt on resume), so it can't arise.
2. snp_setup_rmpopt() re-init pass (patch 4): performance-only and self-correcting, doesn't occur on RMPOPT-capable platforms (the x86_snp_shutdown path frees
the workqueue, so re-init re-runs the pass) — the guarded case is legacy-firmware-only.
3. mod_delayed_work() and VM churn (patch 6): deliberate — queue_delayed_work() would regress the common case (scanning a guest before its page conversion
completes), the deferral is best-effort and self-limiting.
Thanks,
Ashish
prev parent reply other threads:[~2026-07-20 20:39 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-30 18:08 [PATCH v10 0/6] Add RMPOPT support Ashish Kalra
2026-06-30 18:09 ` [PATCH v10 1/6] x86/cpufeatures: Add X86_FEATURE_RMPOPT feature flag Ashish Kalra
2026-07-20 21:12 ` Borislav Petkov
2026-06-30 18:10 ` [PATCH v10 2/6] x86/sev: Initialize RMPOPT configuration MSRs Ashish Kalra
2026-07-20 22:17 ` Borislav Petkov
2026-07-20 22:38 ` Kalra, Ashish
2026-07-21 1:48 ` Borislav Petkov
2026-07-21 14:26 ` Kalra, Ashish
2026-07-21 14:57 ` K Prateek Nayak
2026-07-21 20:46 ` Kalra, Ashish
2026-07-22 2:46 ` K Prateek Nayak
2026-07-21 15:32 ` Borislav Petkov
2026-06-30 18:11 ` [PATCH v10 3/6] x86/sev: Disable CPU hotplug while SNP is active Ashish Kalra
2026-07-01 9:40 ` Jethro Beekman
2026-07-01 16:39 ` K Prateek Nayak
2026-07-01 21:08 ` Kalra, Ashish
2026-07-01 21:25 ` Kalra, Ashish
2026-07-06 12:02 ` Jethro Beekman
2026-06-30 18:11 ` [PATCH v10 4/6] x86/sev: Add support to perform RMP optimizations asynchronously Ashish Kalra
2026-07-21 15:06 ` K Prateek Nayak
2026-06-30 18:11 ` [PATCH v10 5/6] x86/sev: Add interface to re-enable RMP optimizations Ashish Kalra
2026-06-30 18:12 ` [PATCH v10 6/6] KVM: SEV: Perform RMP optimizations on SNP guest shutdown Ashish Kalra
2026-07-20 20:17 ` [PATCH v10 0/6] Add RMPOPT support Kalra, Ashish
2026-07-20 20:28 ` Borislav Petkov
2026-07-20 20:39 ` Kalra, Ashish [this message]
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