[PATCH v4 01/23] 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; Reviewed-by: Daniel P. Berrangé <berrange(a)redhat.com&gt; Reviewed-by: Xiaoyao Li <xiaoyao.li(a)intel.com&gt; --- tools/virt-host-validate-common.c | 31 ++++++++++++++++++++++++++++++- tools/virt-host-validate-common.h | 1 + 2 files changed, 31 insertions(+), 1 deletion(-) diff --git a/tools/virt-host-validate-common.c b/tools/virt-host-validate-common.c index 63cc3dbe7b..59f6ac3319 100644 --- a/tools/virt-host-validate-common.c +++ b/tools/virt-host-validate-common.c @@ -44,7 +44,8 @@ VIR_ENUM_IMPL(virHostValidateCPUFlag, "svm", "sie", "158", - "sev"); + "sev", + "tdx_host_platform"); int virHostValidateDeviceExists(const char *hvname, @@ -434,12 +435,36 @@ virHostValidateAMDSev(const char *hvname, } +static int virHostValidateIntelTDX(virValidateLevel level) +{ + g_autofree char *mod_value = NULL; + + if (virFileReadValueString(&mod_value, "/sys/module/kvm_intel/parameters/tdx") < 0) { + virValidateFail(level, "Intel Trust Domain Extentions not " + "supported by the currently used kernel"); + return VIR_VALIDATE_FAILURE(level); + } + + if (mod_value[0] != 'Y') { + virValidateFail(level, + "Intel Trust Domain Extentions appears to be " + "disabled in kernel. Add kvm_intel.tdx=Y " + "to the kernel cmdline arguments"); + return VIR_VALIDATE_FAILURE(level); + } + + virValidatePass(); + return 1; +} + + int virHostValidateSecureGuests(const char *hvname, virValidateLevel level) { 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"}; @@ -450,6 +475,8 @@ 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; virValidateCheck(hvname, "%s", _("Checking for secure guest support")); if (ARCH_IS_S390(arch)) { @@ -485,6 +512,8 @@ int virHostValidateSecureGuests(const char *hvname, } } else if (hasAMDSev) { return virHostValidateAMDSev(hvname, level); + } else if (hasIntelTDX) { + return virHostValidateIntelTDX(level); } virValidateFail(level, diff --git a/tools/virt-host-validate-common.h b/tools/virt-host-validate-common.h index 7fb3545fe3..c81d203933 100644 --- a/tools/virt-host-validate-common.h +++ b/tools/virt-host-validate-common.h @@ -32,6 +32,7 @@ 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; -- 2.47.1