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 v11 4/6] x86/sev: Add support to perform RMP optimizations asynchronously
Date: Mon, 3 Aug 2026 14:37:59 -0500 [thread overview]
Message-ID: <df5f5f6f-7278-42e7-bc7d-8e56187d1438@amd.com> (raw)
In-Reply-To: <178578506318.2377606.14791252769672870038@Ubuntu-2204-jammy-amd64-base>
On 8/3/2026 2:24 PM, Borislav Petkov wrote:
> Kalra, Ashish <ashish.kalra@amd.com> wrote:
>> Followers are RMP-scan cache hits (cheap) and this only runs at setup/teardown
>
> How?
>
> I see the workqueue running periodically. And in talking about periodically, RMPOPT_WORK_TIMEOUT is not used anywhere.
>
> What's up?
RMPOPT_WORK_TIMEOUT is used by snp_rmpopt_all_physmem() (mod_delayed_work()), which is added in the next patch — I'll
move the define there so each patch is self-contained.
It isn't periodic either: the handler doesn't re-arm itself. The work runs at setup and re-init with queue_delayed_work(),
and then per SNP-guest teardown via mod_delayed_work() (batched by the timeout) once the later patches wire that up.
Thanks,
Ashish
next prev parent reply other threads:[~2026-08-03 19:38 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-27 19:00 [PATCH v11 0/6] Add RMPOPT support Ashish Kalra
2026-07-27 19:03 ` [PATCH v11 1/6] x86/cpufeatures: Add X86_FEATURE_RMPOPT feature flag Ashish Kalra
2026-07-27 19:01 ` Ashish Kalra
2026-07-27 19:04 ` [PATCH v11 2/6] x86/sev: Disable CPU hotplug while SNP is active Ashish Kalra
2026-07-27 19:37 ` sashiko-bot
2026-07-27 20:44 ` Kalra, Ashish
2026-07-29 2:15 ` Borislav Petkov
2026-07-29 17:51 ` Kalra, Ashish
2026-07-31 19:35 ` Tom Lendacky
2026-07-31 20:27 ` Kalra, Ashish
2026-07-27 19:04 ` [PATCH v11 3/6] x86/sev: Initialize RMPOPT configuration MSRs Ashish Kalra
2026-07-27 19:22 ` sashiko-bot
2026-07-27 21:02 ` Kalra, Ashish
2026-07-30 2:07 ` Borislav Petkov
2026-07-30 2:55 ` K Prateek Nayak
2026-07-30 3:39 ` Borislav Petkov
2026-07-30 19:52 ` Kalra, Ashish
2026-07-30 20:00 ` Kalra, Ashish
2026-07-31 0:12 ` Borislav Petkov
2026-07-31 19:43 ` Tom Lendacky
2026-07-27 19:05 ` [PATCH v11 4/6] x86/sev: Add support to perform RMP optimizations asynchronously Ashish Kalra
2026-07-27 19:22 ` sashiko-bot
2026-07-27 20:49 ` Kalra, Ashish
2026-07-31 5:44 ` Borislav Petkov
2026-07-31 12:37 ` Kalra, Ashish
2026-08-03 18:56 ` Kalra, Ashish
2026-08-03 19:24 ` Borislav Petkov
2026-08-03 19:37 ` Kalra, Ashish [this message]
2026-08-03 21:02 ` Borislav Petkov
2026-08-03 21:23 ` Kalra, Ashish
2026-08-03 21:38 ` Borislav Petkov
2026-08-03 22:22 ` Kalra, Ashish
2026-08-05 0:49 ` Borislav Petkov
2026-08-05 2:38 ` Kalra, Ashish
2026-08-05 19:28 ` Borislav Petkov
2026-08-05 21:04 ` Kalra, Ashish
2026-08-05 15:12 ` Dave Hansen
2026-08-05 19:33 ` Borislav Petkov
2026-08-03 21:10 ` Borislav Petkov
2026-07-31 20:14 ` Tom Lendacky
2026-07-27 19:05 ` [PATCH v11 5/6] x86/sev: Add interface to re-enable RMP optimizations Ashish Kalra
2026-07-27 19:06 ` [PATCH v11 6/6] KVM: SEV: Perform RMP optimizations on SNP guest shutdown Ashish Kalra
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