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Fri, 30 May 2025 00:14:49 -0700 (PDT) X-Google-Smtp-Source: AGHT+IE1G/T5/jflLfxnHWN5OvFdkllSxpUwgLtSaZ7oXLkjFreKJ+JUQ4P4Yytm5Hsmtwg+HnOufg== X-Received: by 2002:aa7:d901:0:b0:605:7f67:5148 with SMTP id 4fb4d7f45d1cf-6057f675189mr737397a12.28.1748589289465; Fri, 30 May 2025 00:14:49 -0700 (PDT) From: Paolo Bonzini To: qemu-devel@nongnu.org Cc: Xiaoyao Li , Gerd Hoffmann , Zhao Liu Subject: [PULL 47/77] i386/tdx: Set kvm_readonly_mem_enabled to false for TDX VM Date: Fri, 30 May 2025 09:12:17 +0200 Message-ID: <20250530071250.2050910-48-pbonzini@redhat.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250530071250.2050910-1-pbonzini@redhat.com> References: <20250530071250.2050910-1-pbonzini@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.133.124; envelope-from=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -49 X-Spam_score: -5.0 X-Spam_bar: ----- X-Spam_report: (-5.0 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-2.902, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1748589990697116600 Content-Type: text/plain; charset="utf-8" From: Xiaoyao Li TDX only supports readonly for shared memory but not for private memory. In the view of QEMU, it has no idea whether a memslot is used as shared memory of private. Thus just mark kvm_readonly_mem_enabled to false to TDX VM for simplicity. Signed-off-by: Xiaoyao Li Acked-by: Gerd Hoffmann Reviewed-by: Zhao Liu Link: https://lore.kernel.org/r/20250508150002.689633-36-xiaoyao.li@intel.c= om Signed-off-by: Paolo Bonzini --- target/i386/kvm/tdx.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/target/i386/kvm/tdx.c b/target/i386/kvm/tdx.c index accaefb4011..344e560b4b8 100644 --- a/target/i386/kvm/tdx.c +++ b/target/i386/kvm/tdx.c @@ -384,6 +384,15 @@ static int tdx_kvm_init(ConfidentialGuestSupport *cgs,= Error **errp) return -EOPNOTSUPP; } =20 + /* + * Set kvm_readonly_mem_allowed to false, because TDX only supports re= adonly + * memory for shared memory but not for private memory. Besides, wheth= er a + * memslot is private or shared is not determined by QEMU. + * + * Thus, just mark readonly memory not supported for simplicity. + */ + kvm_readonly_mem_allowed =3D false; + qemu_add_machine_init_done_notifier(&tdx_machine_done_notify); =20 tdx_guest =3D tdx; --=20 2.49.0