[PATCH rfcv4 01/13] tools: Secure guest check for Intel in virt-host-validate

Add check in virt-host-validate for secure guest support on x86 for Intel Trust Domain Extentions. Suggested-by: Daniel P. Berrangé <berrange(a)redhat.com&gt; Signed-off-by: Zhenzhong Duan <zhenzhong.duan(a)intel.com&gt; --- tools/virt-host-validate-common.c | 22 +++++++++++++++++++++- tools/virt-host-validate-common.h | 1 + 2 files changed, 22 insertions(+), 1 deletion(-) diff --git a/tools/virt-host-validate-common.c b/tools/virt-host-validate-common.c index c8a23e2e99..4f0698b8ce 100644 --- a/tools/virt-host-validate-common.c +++ b/tools/virt-host-validate-common.c @@ -43,7 +43,8 @@ VIR_ENUM_IMPL(virHostValidateCPUFlag, "svm", "sie", "158", - "sev"); + "sev", + "tdx_host_platform"); static bool quiet; @@ -471,6 +472,7 @@ int virHostValidateSecureGuests(const char *hvname, g_autoptr(virBitmap) flags = NULL; bool hasFac158 = false; bool hasAMDSev = false; + bool hasIntelTDX = false; virArch arch = virArchFromHost(); g_autofree char *cmdline = NULL; static const char *kIBMValues[] = {"y", "Y", "on", "ON", "oN", "On", "1"}; @@ -482,6 +484,8 @@ int virHostValidateSecureGuests(const char *hvname, hasFac158 = true; else if (flags && virBitmapIsBitSet(flags, VIR_HOST_VALIDATE_CPU_FLAG_SEV)) hasAMDSev = true; + else if (flags && virBitmapIsBitSet(flags, VIR_HOST_VALIDATE_CPU_FLAG_TDX)) + hasIntelTDX = true; virHostMsgCheck(hvname, "%s", _("for secure guest support")); if (ARCH_IS_S390(arch)) { @@ -539,6 +543,22 @@ int virHostValidateSecureGuests(const char *hvname, "disabled in firmware."); return VIR_HOST_VALIDATE_FAILURE(level); } + } else if (hasIntelTDX) { + if (virFileReadValueString(&mod_value, "/sys/module/kvm_intel/parameters/tdx") < 0) { + virHostMsgFail(level, "Intel Trust Domain Extentions not " + "supported by the currently used kernel"); + return VIR_HOST_VALIDATE_FAILURE(level); + } + + if (mod_value[0] != 'Y') { + virHostMsgFail(level, + "Intel Trust Domain Extentions appears to be " + "disabled in kernel. Add kvm_intel.tdx=Y " + "to the kernel cmdline arguments"); + return VIR_HOST_VALIDATE_FAILURE(level); + } + virHostMsgPass(); + return 1; } virHostMsgFail(level, diff --git a/tools/virt-host-validate-common.h b/tools/virt-host-validate-common.h index 9334fa8588..c64f5669dc 100644 --- a/tools/virt-host-validate-common.h +++ b/tools/virt-host-validate-common.h @@ -39,6 +39,7 @@ typedef enum { VIR_HOST_VALIDATE_CPU_FLAG_SIE, VIR_HOST_VALIDATE_CPU_FLAG_FACILITY_158, VIR_HOST_VALIDATE_CPU_FLAG_SEV, + VIR_HOST_VALIDATE_CPU_FLAG_TDX, VIR_HOST_VALIDATE_CPU_FLAG_LAST, } virHostValidateCPUFlag; -- 2.34.1