github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-27 08:33:17 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

KVM: SVM: Macrofy SEV=n versions of sev_xxx_guest()

Browse Source 
Define sev_{,es_,snp_}guest() as "false" when SEV is disabled via Kconfig,
i.e. when CONFIG_KVM_AMD_SEV=n.  Despite the helpers being __always_inline,
gcc-12 is somehow incapable of realizing that the return value is a
compile-time constant and generates sub-optimal code.

Opportunistically clump the paths together to reduce the amount of
ifdeffery.

No functional change intended.

Link: https://lore.kernel.org/r/20241127234659.4046347-1-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Sean Christopherson 2024-11-27 15:46:59 -08:00
parent 3522c41975
commit 45d522d3ee
1 changed files with 6 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
arch/x86/kvm/svm/svm.h
View File

@ -358,39 +358,32 @@ static __always_inline struct kvm_sev_info *to_kvm_sev_info(struct kvm *kvm)
return &to_kvm_svm(kvm)->sev_info;
}
#ifdef CONFIG_KVM_AMD_SEV
static __always_inline bool sev_guest(struct kvm *kvm)
{
#ifdef CONFIG_KVM_AMD_SEV
struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
return sev->active;
#else
return false;
#endif
}
static __always_inline bool sev_es_guest(struct kvm *kvm)
{
#ifdef CONFIG_KVM_AMD_SEV
struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
return sev->es_active && !WARN_ON_ONCE(!sev->active);
#else
return false;
#endif
}
static __always_inline bool sev_snp_guest(struct kvm *kvm)
{
#ifdef CONFIG_KVM_AMD_SEV
struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
return (sev->vmsa_features & SVM_SEV_FEAT_SNP_ACTIVE) &&
!WARN_ON_ONCE(!sev_es_guest(kvm));
#else
return false;
#endif
}
#else
#define sev_guest(kvm) false
#define sev_es_guest(kvm) false
#define sev_snp_guest(kvm) false
#endif
static inline bool ghcb_gpa_is_registered(struct vcpu_svm *svm, u64 val)
{