[PATCH v3 4/7] KVM: SEV: Consolidate logic for printing state of SEV{,-ES,-SNP} enabling

Sean Christopherson
2026-04-16T23:23:46Z

Add a helper to print enabled/unusable/disabled for SEV+ VM types in
anticipation of SNP also being subjecting to "unusable" logic.

No functional change intended.

Signed-off-by: Sean Christopherson <seanjc@google.com>
---
arch/x86/kvm/svm/sev.c | 15 ++++++++-------
1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c
index ea4ce371d5f3..dfeb660b8f5d 100644
--- a/arch/x86/kvm/svm/sev.c
+++ b/arch/x86/kvm/svm/sev.c
@@ -3050,6 +3050,11 @@ static bool is_sev_snp_initialized(void)
return initialized;
}

+static const char * __init sev_str_feature_state(bool is_supported, bool is_usable)
+{
+ return is_supported ? is_usable ? "enabled" : "unusable" : "disabled";
+}
+
void __init sev_hardware_setup(void)
{
unsigned int eax, ebx, ecx, edx, sev_asid_count, sev_es_asid_count;
@@ -3199,19 +3204,15 @@ void __init sev_hardware_setup(void)

if (boot_cpu_has(X86_FEATURE_SEV))
pr_info("SEV %s (ASIDs %u - %u)\n",
- sev_supported ? min_sev_asid <= max_sev_asid ? "enabled" :
- "unusable" :
- "disabled",
+ sev_str_feature_state(sev_supported, min_sev_asid <= max_sev_asid),
min_sev_asid, max_sev_asid);
if (boot_cpu_has(X86_FEATURE_SEV_ES))
pr_info("SEV-ES %s (ASIDs %u - %u)\n",
- sev_es_supported ? min_sev_es_asid <= max_sev_es_asid ? "enabled" :
- "unusable" :
- "disabled",
+ sev_str_feature_state(sev_es_supported, min_sev_es_asid <= max_sev_es_asid),
min_sev_es_asid, max_sev_es_asid);
if (boot_cpu_has(X86_FEATURE_SEV_SNP))
pr_info("SEV-SNP %s (ASIDs %u - %u)\n",
- str_enabled_disabled(sev_snp_supported),
+ sev_str_feature_state(sev_snp_supported, true),
min_snp_asid, max_snp_asid);

sev_enabled = sev_supported;
--
2.54.0.rc1.513.gad8abe7a5a-goog