From: Dave Hansen <dave.hansen@intel.com>
To: Andrew Cooper <andrew.cooper3@citrix.com>
Cc: Ashish.Kalra@amd.com, KPrateek.Nayak@amd.com,
Michael.Roth@amd.com, Nathan.Fontenot@amd.com,
Tycho.Andersen@amd.com, aik@amd.com, ardb@kernel.org,
babu.moger@amd.com, bp@alien8.de, darwi@linutronix.de,
dave.hansen@linux.intel.com, davem@davemloft.net,
dyoung@redhat.com, herbert@gondor.apana.org.au, hpa@zytor.com,
jackyli@google.com, jacobhxu@google.com, john.allen@amd.com,
kvm@vger.kernel.org, linux-coco@lists.linux.dev,
linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org,
mingo@redhat.com, nikunj@amd.com,
pawan.kumar.gupta@linux.intel.com, pbonzini@redhat.com,
peterz@infradead.org, pgonda@google.com, rientjes@google.com,
seanjc@google.com, tglx@kernel.org, thomas.lendacky@amd.com,
x86@kernel.org, xin@zytor.com
Subject: Re: [PATCH v2 3/7] x86/sev: add support for RMPOPT instruction
Date: Wed, 4 Mar 2026 08:03:08 -0800 [thread overview]
Message-ID: <eebe6708-41fe-410e-bd22-766c0197ac6a@intel.com> (raw)
In-Reply-To: <4ec520a1-68c7-4833-9e8f-edc610e5fdfa@citrix.com>
On 3/4/26 07:56, Andrew Cooper wrote:
> Logic asking hardware to optimise a 1G region because of no guest memory
> should at least WARN() if hardware comes back and says "well hang on now..."
It would be _nice_ to have a system where we can do a WARN(). But for
something that's just a lowly optimization, I'd rather that RMPOPT lose
the occasional race with a shared=>private conversion than have it take
a lock and _block_ those conversions.
next prev parent reply other threads:[~2026-03-04 16:03 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-02 21:35 [PATCH v2 0/7] Add RMPOPT support Ashish Kalra
2026-03-02 21:35 ` [PATCH v2 1/7] x86/cpufeatures: Add X86_FEATURE_AMD_RMPOPT feature flag Ashish Kalra
2026-03-02 23:00 ` Dave Hansen
2026-03-05 12:36 ` Borislav Petkov
2026-03-02 21:35 ` [PATCH v2 2/7] x86/sev: add support for enabling RMPOPT Ashish Kalra
2026-03-02 22:32 ` Dave Hansen
2026-03-02 22:55 ` Kalra, Ashish
2026-03-02 23:00 ` Dave Hansen
2026-03-02 23:11 ` Kalra, Ashish
2026-03-02 22:33 ` Dave Hansen
2026-03-06 15:18 ` Borislav Petkov
2026-03-06 15:33 ` Tom Lendacky
2026-03-02 21:36 ` [PATCH v2 3/7] x86/sev: add support for RMPOPT instruction Ashish Kalra
2026-03-02 22:57 ` Dave Hansen
2026-03-02 23:09 ` Kalra, Ashish
2026-03-02 23:15 ` Dave Hansen
2026-03-04 15:56 ` Andrew Cooper
2026-03-04 16:03 ` Dave Hansen [this message]
2026-03-25 21:53 ` Kalra, Ashish
2026-03-26 0:40 ` Andrew Cooper
2026-03-26 2:02 ` Kalra, Ashish
2026-03-26 2:14 ` Kalra, Ashish
2026-03-04 15:01 ` Sean Christopherson
2026-03-04 15:25 ` Dave Hansen
2026-03-04 15:32 ` Dave Hansen
2026-03-05 1:40 ` Kalra, Ashish
2026-03-05 19:22 ` Kalra, Ashish
2026-03-05 19:40 ` Dave Hansen
2026-03-11 21:24 ` Kalra, Ashish
2026-03-11 22:20 ` Dave Hansen
2026-03-16 19:03 ` Kalra, Ashish
2026-03-18 14:00 ` Dave Hansen
2026-03-02 21:36 ` [PATCH v2 4/7] x86/sev: Add interface to re-enable RMP optimizations Ashish Kalra
2026-03-02 21:36 ` [PATCH v2 5/7] KVM: guest_memfd: Add cleanup interface for guest teardown Ashish Kalra
2026-03-09 9:01 ` Ackerley Tng
2026-03-10 22:18 ` Kalra, Ashish
2026-03-11 6:00 ` Ackerley Tng
2026-03-11 21:49 ` Kalra, Ashish
2026-03-27 17:16 ` Ackerley Tng
2026-03-02 21:37 ` [PATCH v2 6/7] KVM: SEV: Implement SEV-SNP specific guest cleanup Ashish Kalra
2026-03-02 21:37 ` [PATCH v2 7/7] x86/sev: Add debugfs support for RMPOPT Ashish Kalra
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