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[v3,11/13] KVM: SVM: Drop redundant svm_sev_enabled() helper

Message ID 20210122202144.2756381-12-seanjc@google.com (mailing list archive)
State New, archived
Headers show
Series KVM: SVM: Misc SEV cleanups | expand

Commit Message

Sean Christopherson Jan. 22, 2021, 8:21 p.m. UTC
Replace calls to svm_sev_enabled() with direct checks on sev_enabled, or
in the case of svm_mem_enc_op, simply drop the call to svm_sev_enabled().
This effectively replaces checks against a valid max_sev_asid with checks
against sev_enabled.  sev_enabled is forced off by sev_hardware_setup()
if max_sev_asid is invalid, all call sites are guaranteed to run after
sev_hardware_setup(), and all of the checks care about SEV being fully
enabled (as opposed to intentionally handling the scenario where
max_sev_asid is valid but SEV enabling fails due to OOM).

Reviewed by: Tom Lendacky <thomas.lendacky@amd.com>
Reviewed-by: Brijesh Singh <brijesh.singh@amd.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
 arch/x86/kvm/svm/sev.c | 6 +++---
 arch/x86/kvm/svm/svm.h | 5 -----
 2 files changed, 3 insertions(+), 8 deletions(-)
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diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c
index 55a47a34a0ef..15bdc97454ab 100644
--- a/arch/x86/kvm/svm/sev.c
+++ b/arch/x86/kvm/svm/sev.c
@@ -1057,7 +1057,7 @@  int svm_mem_enc_op(struct kvm *kvm, void __user *argp)
 	struct kvm_sev_cmd sev_cmd;
 	int r;
-	if (!svm_sev_enabled() || !sev_enabled)
+	if (!sev_enabled)
 		return -ENOTTY;
 	if (!argp)
@@ -1322,7 +1322,7 @@  void __init sev_hardware_setup(void)
 void sev_hardware_teardown(void)
-	if (!svm_sev_enabled())
+	if (!sev_enabled)
@@ -1333,7 +1333,7 @@  void sev_hardware_teardown(void)
 int sev_cpu_init(struct svm_cpu_data *sd)
-	if (!svm_sev_enabled())
+	if (!sev_enabled)
 		return 0;
 	sd->sev_vmcbs = kcalloc(max_sev_asid + 1, sizeof(void *), GFP_KERNEL);
diff --git a/arch/x86/kvm/svm/svm.h b/arch/x86/kvm/svm/svm.h
index 4eb4bab0ca3e..8cb4395b58a0 100644
--- a/arch/x86/kvm/svm/svm.h
+++ b/arch/x86/kvm/svm/svm.h
@@ -569,11 +569,6 @@  void svm_vcpu_unblocking(struct kvm_vcpu *vcpu);
 extern unsigned int max_sev_asid;
-static inline bool svm_sev_enabled(void)
-	return IS_ENABLED(CONFIG_KVM_AMD_SEV) ? max_sev_asid : 0;
 void sev_vm_destroy(struct kvm *kvm);
 int svm_mem_enc_op(struct kvm *kvm, void __user *argp);
 int svm_register_enc_region(struct kvm *kvm,