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KVM: SVM: Move SEV VMCB tracking allocation to sev.c

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Move the allocation of the SEV VMCB array to sev.c to help pave the way
toward encapsulating SEV enabling wholly within sev.c.

No functional change intended.

Reviewed by: Tom Lendacky <thomas.lendacky@amd.com>
Reviewed-by: Brijesh Singh <brijesh.singh@amd.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210422021125.3417167-13-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Sean Christopherson 2021-04-21 19:11:22 -07:00 committed by Paolo Bonzini
parent 8cb756b7bd
commit b95c221cac
3 changed files with 20 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
arch/x86/kvm/svm/sev.c
View File

@ -1906,6 +1906,18 @@ void sev_hardware_teardown(void)
sev_flush_asids();
}
int sev_cpu_init(struct svm_cpu_data *sd)
{
if (!svm_sev_enabled())
return 0;
sd->sev_vmcbs = kcalloc(max_sev_asid + 1, sizeof(void *), GFP_KERNEL);
if (!sd->sev_vmcbs)
return -ENOMEM;
return 0;
}
/*
* Pages used by hardware to hold guest encrypted state must be flushed before
* returning them to the system.

15
arch/x86/kvm/svm/svm.c
View File

@ -553,22 +553,21 @@ static void svm_cpu_uninit(int cpu)
static int svm_cpu_init(int cpu)
{
struct svm_cpu_data *sd;
int ret = -ENOMEM;
sd = kzalloc(sizeof(struct svm_cpu_data), GFP_KERNEL);
if (!sd)
return -ENOMEM;
return ret;
sd->cpu = cpu;
sd->save_area = alloc_page(GFP_KERNEL);
if (!sd->save_area)
goto free_cpu_data;
clear_page(page_address(sd->save_area));
if (svm_sev_enabled()) {
sd->sev_vmcbs = kcalloc(max_sev_asid + 1, sizeof(void *),
GFP_KERNEL);
if (!sd->sev_vmcbs)
goto free_save_area;
}
ret = sev_cpu_init(sd);
if (ret)
goto free_save_area;
per_cpu(svm_data, cpu) = sd;
@ -578,7 +577,7 @@ free_save_area:
__free_page(sd->save_area);
free_cpu_data:
kfree(sd);
return -ENOMEM;
return ret;
}

1
arch/x86/kvm/svm/svm.h
View File

@ -578,6 +578,7 @@ void pre_sev_run(struct vcpu_svm *svm, int cpu);
void __init sev_set_cpu_caps(void);
void __init sev_hardware_setup(void);
void sev_hardware_teardown(void);
int sev_cpu_init(struct svm_cpu_data *sd);
void sev_free_vcpu(struct kvm_vcpu *vcpu);
int sev_handle_vmgexit(struct kvm_vcpu *vcpu);
int sev_es_string_io(struct vcpu_svm *svm, int size, unsigned int port, int in);