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a=ed25519; pk=sAZDYXdm6Iz8FHitpHeFlCMXwabodTm7p8/3/8xUxuU= X-Developer-Signature: v=1; a=ed25519-sha256; t=1787734920; l=1513; i=ackerleytng@google.com; s=20260225; h=from:subject:message-id; bh=OAlLWBhYYG/9ob/PX5hBH6y+Ywi1lILRcsrUDjKKezs=; b=daPi3Fjs1SSb8r0p9nYFDfhMv5JgbSUJww8xvwdjn/5ezcuq3olIFhfPZsB7H97tyDKbuwa/i HzQS2OkcWgBCL8fXp9OmJpR3tdyNqhLN3UNa4IWubqk/JfORozIirAG X-Mailer: b4 0.16.0 Message-ID: <20260826-gmem-no-return-page-v4-0-3bb9c1ddb4e3@google.com> Subject: [PATCH v4 0/5] Stop returning struct page from guest_memfd PFN lookup From: Ackerley Tng To: Sean Christopherson , Paolo Bonzini , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Ashish Kalra , Michael Roth , Brijesh Singh , Marc Zyngier , Oliver Upton , Joey Gouly , Steffen Eiden , Suzuki K Poulose , Zenghui Yu , Catalin Marinas , Will Deacon , David Hildenbrand , Yan Zhao , "Edgecombe, Rick P" , Vishal Annapurve , Fuad Tabba Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, Ackerley Tng Content-Type: text/plain; charset="utf-8" v4 splits out a new patch (3) that makes use of KVM MMU invalidation logic introduced into the RMP fault handling in patch 2 to avoid warning on a benign case. Other changes in v4: + Took Sean's version of the changelog for patch 2 + Picked up Fuad's Reviewed-by: and Tested-by: v3: https://patch.msgid.link/20260820-gmem-no-return-page-v3-0-3bf8f80a7b4d@google.com v2: https://patch.msgid.link/20260818-gmem-no-return-page-v2-0-5298f42d49bb@google.com v1: https://patch.msgid.link/20260818-gmem-no-return-page-v1-0-4f8d939efdbc@google.com Signed-off-by: Ackerley Tng --- Ackerley Tng (3): KVM: SEV: Treat unassigned RMP entry as benign race on PSMASH failure KVM: SEV: Check for invalidation before warning on unassigned RMP entry KVM: SEV: Drop page refcount early in VMSA reload Sean Christopherson (2): KVM: SEV: Drop page refcount early during RMP fault handling KVM: guest_memfd: Stop returning struct page from PFN lookup arch/arm64/kvm/mmu.c | 4 +--- arch/arm64/kvm/nested.c | 4 ++-- arch/x86/kvm/mmu/mmu.c | 2 +- arch/x86/kvm/svm/sev.c | 53 ++++++++++++++++++++++++++++-------------------- include/linux/kvm_host.h | 6 ++---- virt/kvm/guest_memfd.c | 9 ++------ 6 files changed, 39 insertions(+), 39 deletions(-) --- base-commit: 76671054f9a1ff6abb976583cd8da37650acdc97 change-id: 20260818-gmem-no-return-page-614927a29f97 Best regards, -- Ackerley Tng