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i386/tdx: Set value of <GetTdVmCallInfo> based on capabilities of both KVM and QEMU

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KVM reports the supported TDVMCALL sub leafs in TDX capabilities.

one for kernel-supported
    TDVMCALLs (userspace can set those blindly) and one for user-supported
    TDVMCALLs (userspace can set those if it knows how to handle them)

Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com>
Link: https://lore.kernel.org/r/20250703024021.3559286-4-xiaoyao.li@intel.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Xiaoyao Li
2025-07-12 15:28:20 +02:00
committed by Paolo Bonzini
parent 25c98a1350
commit 55be385b10
1 changed files with 9 additions and 2 deletions
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target/i386/kvm/tdx.c
+9 -2
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@@ -1256,14 +1256,21 @@ out_free:
g_free(task);
}
#define SUPPORTED_TDVMCALLINFO_1_R11 (0)
#define SUPPORTED_TDVMCALLINFO_1_R12 (0)
void tdx_handle_get_tdvmcall_info(X86CPU *cpu, struct kvm_run *run)
{
if (run->tdx.get_tdvmcall_info.leaf != 1) {
return;
}
run->tdx.get_tdvmcall_info.r11 = 0;
run->tdx.get_tdvmcall_info.r12 = 0;
run->tdx.get_tdvmcall_info.r11 = (tdx_caps->user_tdvmcallinfo_1_r11 &
SUPPORTED_TDVMCALLINFO_1_R11) |
tdx_caps->kernel_tdvmcallinfo_1_r11;
run->tdx.get_tdvmcall_info.r12 = (tdx_caps->user_tdvmcallinfo_1_r12 &
SUPPORTED_TDVMCALLINFO_1_R12) |
tdx_caps->kernel_tdvmcallinfo_1_r12;
run->tdx.get_tdvmcall_info.r13 = 0;
run->tdx.get_tdvmcall_info.r14 = 0;