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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 , Barry Song , Axel Rasmussen , Yuanchu Xie , Wei Xu , Youngjun Park , Qi Zheng , Shakeel Butt , Kiryl Shutsemau , Baoquan He , Jason Gunthorpe , John Hubbard , Peter Xu , tarunsahu@google.com, Randy Dunlap , Lorenzo Stoakes , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Jason Gunthorpe , Fuad Tabba , Vlastimil Babka , Baoquan He 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 , Xiaoyao Li X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1788135915; l=2002; i=ackerleytng@google.com; s=20260225; h=from:subject:message-id; bh=LaDn2CsI38OBZyS6stNAkFJkoZdaUfE8YC0Rnt/13Oo=; b=5ojShQdxW/ITFZ0NQyVogZ4ru4lAf3wNfSGMZhvme6tF3hgOkZs2drAVgwLc05VWwGcoPekF7 TjjTBYl+XCtCB93l/Nax9ptE7IrsyxW78rE0iJUz2HiE05VWEHJBTfT 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-Rspam-User: X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: C4E5AA000A X-Stat-Signature: z6sk58556weq896f78p1m451s4oy5m74 X-HE-Tag: 1788135931-508234 X-HE-Meta: U2FsdGVkX19Ej7ftOuwS58czMlgJe19F/2YQZj2u1dRxhCaAPUHf9RdqfJHrdg4vboR+H67DKqLRXOlyPNXHU13KMC53cNQBzvw75wntgrhfx5TvTghHYFiaaCOh0/EFBDc9flxFfP7EfvXS96tftmYy2IUgDCdoxVVkYn8ITTHCstQlm3mt0VIX4S6ckm+SDOiQfkT+9by0SSeKJIbDtktdSynaLmgpGeFdUz74Lz97u7+K/mqsfKYEkrAFbUzlA0tbndvaVECJ3yhlamuA3BwowL17obWbRVcJMjsVTepv8zjIecy4l0YgZ7Ml0PU9wUksKZDLKR3rQ0URn3BxaJsdRJQNmA3ZYgNWM/gfRjSF3hAVKHQgKmRBCoDLY+sYuNiQx0q9cotaxFng7R1mgg/YULdul7/ZrxPvA4ZwuNAP4iuDFlxRbJeaL1KW1C6WuN2ieBncEOBbsG3i+54hcxMtqMl+Topd8kfIMDFTmrJPiBBFS+zfqUeWjA7DwdNbsnaDuBYH1tzFj54PdGxbQ1c5kBjPtpnvgOc3NUj4G2hW+jfXTQl/f+dakf8Rk1kUMkUVfYt1nz1HqGTJQ5g+E1m3p7ZyHz4dsxnrVojuDwlIV9QSjVhcRCx1RnD6VBTlbHZtLBCehA/sWDxffsQQ9hGZge59b/lj3nqxCir9DVGf++uqkJAQvy4cW+tU/ZsGaiKF2m7JS92W0dccPqcbKi/yOYz73+PuGVAUojDX+qebDJCwmwOHylBVhGxRzpVvba9ZArPYj253Pkd995KHFQn6RHWBCQS1/51WHvDzy2x7v9y9LN9kMB75FWjWXyfATcz/6HPE+IYNHUnMIUhw+jMlKg/3TmYmwwisqIM3vRnpAnjSBZoEPOvSaQ+3uhQ/3sJFU9p/SkwCy5/pORA9n8n2UE7ziHX9EipjIO7u5t+geEN+8Df0D56ah6ENpzNJBGhCC6fy0ZkaAJqqQXR bGO4TGiJ 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 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 while RWX memory attributes are on the horizon, they too are expected to be x86-only. 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 supports in-place conversions, 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 Reviewed-by: Fuad Tabba Reviewed-by: Xiaoyao Li Reviewed-by: Binbin Wu Tested-by: Shivank Garg Reviewed-by: David Hildenbrand (Arm) Signed-off-by: Ackerley Tng --- arch/x86/kvm/Kconfig | 3 +++ virt/kvm/Kconfig | 3 --- 2 files changed, 3 insertions(+), 3 deletions(-) diff --git a/arch/x86/kvm/Kconfig b/arch/x86/kvm/Kconfig index 2f8e1b5a8a72c..abb108886733a 100644 --- a/arch/x86/kvm/Kconfig +++ b/arch/x86/kvm/Kconfig @@ -80,6 +80,9 @@ config KVM_WERROR If in doubt, say "N". +config KVM_VM_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 df575449d97b5..a0678ef8ee3f5 100644 --- a/virt/kvm/Kconfig +++ b/virt/kvm/Kconfig @@ -100,9 +100,6 @@ config KVM_ELIDE_TLB_FLUSH_IF_YOUNG config KVM_MMU_LOCKLESS_AGING bool -config KVM_VM_MEMORY_ATTRIBUTES - bool - config KVM_GUEST_MEMFD select XARRAY_MULTI bool -- 2.55.0.897.gb25b4bd76c-goog