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| author | Xiaoyao Li <xiaoyao.li@intel.com> | 2025-05-08 10:59:55 -0400 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2025-05-28 19:35:54 +0200 |
| commit | 4d6e288a350a977b0fb0613db952087928ccd93e (patch) | |
| tree | d6e24a0213f3acdea8c8feda2f3d382def2a9e41 | |
| parent | 9f5771c57dbe92d46361afd992a5851c846d0322 (diff) | |
| download | qemu-4d6e288a350a977b0fb0613db952087928ccd93e.zip qemu-4d6e288a350a977b0fb0613db952087928ccd93e.tar.gz qemu-4d6e288a350a977b0fb0613db952087928ccd93e.tar.bz2 | |
i386/tdx: Define supported KVM features for TDX
For TDX, only limited KVM PV features are supported.
Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com>
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Link: https://lore.kernel.org/r/20250508150002.689633-50-xiaoyao.li@intel.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
| -rw-r--r-- | target/i386/kvm/tdx.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/target/i386/kvm/tdx.c b/target/i386/kvm/tdx.c index 0f7f47c..e35983a 100644 --- a/target/i386/kvm/tdx.c +++ b/target/i386/kvm/tdx.c @@ -32,6 +32,8 @@ #include "kvm_i386.h" #include "tdx.h" +#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) @@ -44,6 +46,14 @@ TDX_TD_ATTRIBUTES_PKS | \ TDX_TD_ATTRIBUTES_PERFMON) +#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; static struct kvm_tdx_capabilities *tdx_caps; @@ -631,6 +641,14 @@ static void tdx_add_supported_cpuid_by_xfam(void) e->edx |= (tdx_caps->supported_xfam & CPUID_XSTATE_XSS_MASK) >> 32; } +static void tdx_add_supported_kvm_features(void) +{ + struct kvm_cpuid_entry2 *e; + + e = find_in_supported_entry(0x40000001, 0); + e->eax = TDX_SUPPORTED_KVM_FEATURES; +} + static void tdx_setup_supported_cpuid(void) { if (tdx_supported_cpuid) { @@ -647,6 +665,8 @@ 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(); } static int tdx_kvm_init(ConfidentialGuestSupport *cgs, Error **errp) |