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Peter Anvin" , Steven Rostedt , Masami Hiramatsu , Mathieu Desnoyers , Jonathan Corbet , Shuah Khan , Shuah Khan , Vishal Annapurve , Andrew Morton , Chris Li , Kairui Song , Kemeng Shi , Nhat Pham , Baoquan He , Barry Song , Axel Rasmussen , Yuanchu Xie , Wei Xu , Youngjun Park , Qi Zheng , Shakeel Butt , Kiryl Shutsemau , Jason Gunthorpe , Vlastimil Babka Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-mm@kvack.org, linux-coco@lists.linux.dev, Ackerley Tng X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1777418714; l=1805; i=ackerleytng@google.com; s=20260225; h=from:subject:message-id; bh=kWyeQB/GQxPIUPFKfrteI7VrZ53oW8LRRzQh+H0D7K8=; b=ileSfoo1GqxHrOuqoCf1RNEpw8cYUg18NzHzeaEeQ9gn9rjBxsIHBnrST9VvuJIYLv12RU1ss NLpW3opkVhZBMlYJzQm+f0+don3AVOIR3jb95eTU6C1vsyq0Yg/rfeb X-Developer-Key: i=ackerleytng@google.com; a=ed25519; pk=sAZDYXdm6Iz8FHitpHeFlCMXwabodTm7p8/3/8xUxuU= X-Endpoint-Received: by B4 Relay for ackerleytng@google.com/20260225 with auth_id=649 X-Original-From: Ackerley Tng Reply-To: ackerleytng@google.com X-Stat-Signature: cgzbq8y9cxr5wqtieahqsp8cxjy6dgei X-Rspamd-Queue-Id: 0989A80006 X-Rspam-User: X-Rspamd-Server: rspam08 X-HE-Tag: 1777418719-621074 X-HE-Meta: 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 I3MV733b YeNhDZYMUVhTmJYVSYYm2NX6k0CoS5qi7r076q4yO1Ad2YVCCYIRIGCLb9Ugv+6f1RSb6bGn7QbSDqO316VkUKb8w79sulPYlbsH2vwyVfnj8bAYPpQb+PAm0Ga0Kb75AzjgSOmnub0DbLYDbeFxTdsCeftSB6fgt+zEoFPu3/J26jT4VZwU2WhNNlrTlSK5ygL7WonMPerglF+KobLwgIMDuDyrdeyzGfNvNIUN37xLE1ZAKY3sghElJLHbo1sUvkmASOT+gBUjoUoPpoV8K9YgEuJSo1vM7W3GIns+h7sDllEfbxCqzabJecmbI9PdwbkWaSOw0/DBJHfIlxitVP1vr2pYbbj0y44Rtd25OPDFm+OnjpRhxIYobCMSqsk5XCGOSeo7D/99cGH/2g/VgWHyHH9kx0wf8NtmdWHIbCzrS5a57dEnDhq6lnRdZvGcKm/3A/b0Q81zz7zdrLCHPghr8ZA== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: From: Sean Christopherson Bury KVM_VM_MEMORY_ATTRIBUTES in x86 to discourage other architectures from adding support for per-VM memory attributes, because tracking private vs. shared memory on a per-VM basis is now deprecated in favor of tracking on a per-guest_memfd basis, and no other memory attributes are on the horizon. This will also allow modifying KVM_VM_MEMORY_ATTRIBUTES to be user-selectable (in x86) without creating weirdness in KVM's Kconfigs. Now that guest_memfd support memory attributes, it's entirely possible to run x86 CoCo VMs without support for KVM_VM_MEMORY_ATTRIBUTES. Leave the code itself in common KVM so that it's trivial to undo this change if new per-VM attributes do come along. Signed-off-by: Sean Christopherson Signed-off-by: Ackerley Tng --- arch/x86/kvm/Kconfig | 4 ++++ virt/kvm/Kconfig | 4 ---- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/arch/x86/kvm/Kconfig b/arch/x86/kvm/Kconfig index 26f6afd51bbdc..b6d65ee664d0f 100644 --- a/arch/x86/kvm/Kconfig +++ b/arch/x86/kvm/Kconfig @@ -80,6 +80,10 @@ config KVM_WERROR If in doubt, say "N". +config KVM_VM_MEMORY_ATTRIBUTES + select KVM_MEMORY_ATTRIBUTES + bool + config KVM_SW_PROTECTED_VM bool "Enable support for KVM software-protected VMs" depends on EXPERT diff --git a/virt/kvm/Kconfig b/virt/kvm/Kconfig index e371e079e2c50..663de6421eda2 100644 --- a/virt/kvm/Kconfig +++ b/virt/kvm/Kconfig @@ -103,10 +103,6 @@ config KVM_MMU_LOCKLESS_AGING config KVM_MEMORY_ATTRIBUTES bool -config KVM_VM_MEMORY_ATTRIBUTES - select KVM_MEMORY_ATTRIBUTES - bool - config KVM_GUEST_MEMFD select XARRAY_MULTI select KVM_MEMORY_ATTRIBUTES -- 2.54.0.545.g6539524ca2-goog