From: Kenta Akagi <k@mgml.me>
To: Sasha Levin <sashal@kernel.org>, Sean Christopherson <seanjc@google.com>
Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
stable@vger.kernel.org, Paolo Bonzini <pbonzini@redhat.com>,
Peter Xu <peterx@redhat.com>, David Matlack <dmatlack@google.com>
Subject: Re: [PATCH 5.15.y v3 3/7] KVM: x86/mmu: Derive shadow MMU page role from parent
Date: Sun, 27 Sep 2026 02:21:15 +0900 [thread overview]
Message-ID: <b2be67b6-137f-4381-86fb-0d7bc74dbd3f@mgml.me> (raw)
In-Reply-To: <2026-09-25-daily-reply-0014-re-kvm-mmu-role-prereqs-5-15@kernel.org>
On 2026/09/26 3:48, Sasha Levin wrote:
>> I vote to backport the relevant upstream commits. Reviewing this without those
>> commits is a pain. I think it's these, to get fairly clean cherry-picks?
>>
>> dc1ce45575b3401102568dd60ba8894849d1d64b KVM: MMU: update comment on the number of page role combinations
>> 41e35604eaff2266ba8523787ebe99c5ca4c4045 KVM: X86: Remove useless code to set role.gpte_is_8_bytes when role.direct
>> b46a13cb7ea1137b2e01dfaafcacd5cd79db8390 KVM: X86: Calculate quadrant when !role.gpte_is_8_bytes
>> bb3b394d35e80d7a58ce015191e4960a13f54ba5 KVM: X86: Rename gpte_is_8_bytes to has_4_byte_gpte and invert the direction
>
> Agreed. Those four apply to 5.15 in that order without conflicts.
>
> Kenta, could you send a v4 that starts with them and then carries 3/7 and
> 4/7 in their upstream has_4_byte_gpte form? 3/7 doesn't apply on top of
> them as it is now.
Hi Sasha, Sean,
Thank you for the review and suggestion.
Understood, I'll test and send v4.
Thanks,
Akagi
next prev parent reply other threads:[~2026-09-26 17:21 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-13 15:55 [PATCH 5.15.y v3 0/7] KVM: fixes for CVE-2026-46113 and related issues Kenta Akagi
2026-09-13 15:55 ` [PATCH 5.15.y v3 1/7] KVM: x86/mmu: Use a bool for direct Kenta Akagi
2026-09-13 15:55 ` [PATCH 5.15.y v3 2/7] KVM: x86/mmu: Stop passing "direct" to mmu_alloc_root() Kenta Akagi
2026-09-13 15:55 ` [PATCH 5.15.y v3 3/7] KVM: x86/mmu: Derive shadow MMU page role from parent Kenta Akagi
2026-09-15 2:03 ` Sasha Levin
2026-09-24 17:10 ` Sean Christopherson
2026-09-25 18:48 ` Sasha Levin
2026-09-26 17:21 ` Kenta Akagi [this message]
2026-09-13 15:55 ` [PATCH 5.15.y v3 4/7] KVM: x86/mmu: Always pass 0 for @quadrant when gptes are 8 bytes Kenta Akagi
2026-09-15 2:03 ` Sasha Levin
2026-09-13 15:55 ` [PATCH 5.15.y v3 5/7] KVM: x86/mmu: pull call to drop_large_spte() into __link_shadow_page() Kenta Akagi
2026-09-13 15:55 ` [PATCH 5.15.y v3 6/7] KVM: x86: Fix shadow paging use-after-free due to unexpected GFN Kenta Akagi
2026-09-13 15:55 ` [PATCH 5.15.y v3 7/7] KVM: x86: Fix shadow paging use-after-free due to unexpected role Kenta Akagi
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