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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, Jason Gunthorpe , 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=1786139565; l=1945; i=ackerleytng@google.com; s=20260225; h=from:subject:message-id; bh=+JOgNYzvijHAbgsG714d2CFgRX+TpUch731NU30JkJw=; b=qa1RDK48ZoSRufWd3VcENYFdgzxg5WzQA1log0T8jZiNU2/DF9PGN9GgSFYHGl/wJ2CoWclDe SuehuYSCVQNDv2bAvArbWAzQ5d2REkZybveET4JY+WVWBRXal2ObNBE 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-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 3671E40003 X-Stat-Signature: ijxtfjdforbad5c1jcq5kdgxarq3iwju X-Rspam-User: X-HE-Tag: 1786139577-611475 X-HE-Meta: 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 qs2wMuM9 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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 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 -- 2.55.0.654.g21b8a5bc05-goog