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| author | Paolo Bonzini <pbonzini@redhat.com> | 2022-11-09 17:07:55 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2022-11-09 20:23:59 +0300 |
| commit | 73412dfeea724e6bd775ba64d21157ff322eac9a (patch) | |
| tree | 01f3ddc76e9b45d534d0da9fceb16c6135510d76 /arch/x86/kvm/svm/sev.c | |
| parent | 181d0fb0bb023e8996b1cf7970e3708d72442b0b (diff) | |
| download | linux-73412dfeea724e6bd775ba64d21157ff322eac9a.tar.xz | |
KVM: SVM: do not allocate struct svm_cpu_data dynamically
The svm_data percpu variable is a pointer, but it is allocated via
svm_hardware_setup() when KVM is loaded. Unlike hardware_enable()
this means that it is never NULL for the whole lifetime of KVM, and
static allocation does not waste any memory compared to the status quo.
It is also more efficient and more easily handled from assembly code,
so do it and don't look back.
Reviewed-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/svm/sev.c')
| -rw-r--r-- | arch/x86/kvm/svm/sev.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c index 28064060413a..9b66ee34e264 100644 --- a/arch/x86/kvm/svm/sev.c +++ b/arch/x86/kvm/svm/sev.c @@ -196,7 +196,7 @@ static void sev_asid_free(struct kvm_sev_info *sev) __set_bit(sev->asid, sev_reclaim_asid_bitmap); for_each_possible_cpu(cpu) { - sd = per_cpu(svm_data, cpu); + sd = per_cpu_ptr(&svm_data, cpu); sd->sev_vmcbs[sev->asid] = NULL; } @@ -2600,7 +2600,7 @@ void sev_es_unmap_ghcb(struct vcpu_svm *svm) void pre_sev_run(struct vcpu_svm *svm, int cpu) { - struct svm_cpu_data *sd = per_cpu(svm_data, cpu); + struct svm_cpu_data *sd = per_cpu_ptr(&svm_data, cpu); int asid = sev_get_asid(svm->vcpu.kvm); /* Assign the asid allocated with this SEV guest */ |