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Tsirkin" , Markus Armbruster , Francesco Lavra , Marcelo Tosatti , qemu-devel@nongnu.org, =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Rick Edgecombe , Xiaoyao Li Subject: [PATCH v8 49/55] i386/tdx: Define supported KVM features for TDX Date: Tue, 1 Apr 2025 09:01:59 -0400 Message-Id: <20250401130205.2198253-50-xiaoyao.li@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250401130205.2198253-1-xiaoyao.li@intel.com> References: <20250401130205.2198253-1-xiaoyao.li@intel.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=192.198.163.16; envelope-from=xiaoyao.li@intel.com; helo=mgamail.intel.com X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.997, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, HK_RANDOM_ENVFROM=0.001, HK_RANDOM_FROM=0.999, RCVD_IN_DNSWL_MED=-2.3, 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 @intel.com) X-ZM-MESSAGEID: 1743515331612019100 Content-Type: text/plain; charset="utf-8" For TDX, only limited KVM PV features are supported. Signed-off-by: Xiaoyao Li --- target/i386/kvm/tdx.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/target/i386/kvm/tdx.c b/target/i386/kvm/tdx.c index e07cd9a1ee15..7382b53fcc51 100644 --- a/target/i386/kvm/tdx.c +++ b/target/i386/kvm/tdx.c @@ -32,6 +32,8 @@ #include "kvm_i386.h" #include "tdx.h" =20 +#include "standard-headers/asm-x86/kvm_para.h" + #define TDX_MIN_TSC_FREQUENCY_KHZ (100 * 1000) #define TDX_MAX_TSC_FREQUENCY_KHZ (10 * 1000 * 1000) =20 @@ -44,6 +46,14 @@ TDX_TD_ATTRIBUTES_PKS | \ TDX_TD_ATTRIBUTES_PERFMON) =20 +#define TDX_SUPPORTED_KVM_FEATURES ((1U << KVM_FEATURE_NOP_IO_DELAY) | \ + (1U << KVM_FEATURE_PV_UNHALT) | \ + (1U << KVM_FEATURE_PV_TLB_FLUSH) | \ + (1U << KVM_FEATURE_PV_SEND_IPI) | \ + (1U << KVM_FEATURE_POLL_CONTROL) | \ + (1U << KVM_FEATURE_PV_SCHED_YIELD) | \ + (1U << KVM_FEATURE_MSI_EXT_DEST_ID)) + static TdxGuest *tdx_guest; =20 static struct kvm_tdx_capabilities *tdx_caps; @@ -629,6 +639,14 @@ static void tdx_add_supported_cpuid_by_xfam(void) e->edx |=3D (tdx_caps->supported_xfam & CPUID_XSTATE_XSS_MASK) >> 32; } =20 +static void tdx_add_supported_kvm_features(void) +{ + struct kvm_cpuid_entry2 *e; + + e =3D find_in_supported_entry(0x40000001, 0); + e->eax =3D TDX_SUPPORTED_KVM_FEATURES; +} + static void tdx_setup_supported_cpuid(void) { if (tdx_supported_cpuid) { @@ -645,6 +663,8 @@ static void tdx_setup_supported_cpuid(void) tdx_add_supported_cpuid_by_fixed1_bits(); tdx_add_supported_cpuid_by_attrs(); tdx_add_supported_cpuid_by_xfam(); + + tdx_add_supported_kvm_features(); } =20 static int tdx_kvm_init(ConfidentialGuestSupport *cgs, Error **errp) --=20 2.34.1