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KVM: VMX: introduce alloc_loaded_vmcs

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commit f21f165ef9 upstream.

Group together the calls to alloc_vmcs and loaded_vmcs_init.  Soon we'll also
allocate an MSR bitmap there.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[bwh: Backported to 4.4:
 - No loaded_vmcs::shadow_vmcs field to initialise
 - Adjust context]
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Paolo Bonzini 2018-01-11 12:16:15 +01:00 committed by Greg Kroah-Hartman
parent 81cd492667
commit 8f54df9756
1 changed files with 22 additions and 13 deletions
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35
arch/x86/kvm/vmx.c
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@ -3345,11 +3345,6 @@ static struct vmcs *alloc_vmcs_cpu(int cpu)
return vmcs;
}
static struct vmcs *alloc_vmcs(void)
{
return alloc_vmcs_cpu(raw_smp_processor_id());
}
static void free_vmcs(struct vmcs *vmcs)
{
free_pages((unsigned long)vmcs, vmcs_config.order);
@ -3367,6 +3362,21 @@ static void free_loaded_vmcs(struct loaded_vmcs *loaded_vmcs)
loaded_vmcs->vmcs = NULL;
}
static struct vmcs *alloc_vmcs(void)
{
return alloc_vmcs_cpu(raw_smp_processor_id());
}
static int alloc_loaded_vmcs(struct loaded_vmcs *loaded_vmcs)
{
loaded_vmcs->vmcs = alloc_vmcs();
if (!loaded_vmcs->vmcs)
return -ENOMEM;
loaded_vmcs_init(loaded_vmcs);
return 0;
}
static void free_kvm_area(void)
{
int cpu;
@ -6699,6 +6709,7 @@ static int handle_vmon(struct kvm_vcpu *vcpu)
struct vmcs *shadow_vmcs;
const u64 VMXON_NEEDED_FEATURES = FEATURE_CONTROL_LOCKED
| FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX;
int r;
/* The Intel VMX Instruction Reference lists a bunch of bits that
* are prerequisite to running VMXON, most notably cr4.VMXE must be
@ -6738,10 +6749,9 @@ static int handle_vmon(struct kvm_vcpu *vcpu)
return 1;
}
vmx->nested.vmcs02.vmcs = alloc_vmcs();
if (!vmx->nested.vmcs02.vmcs)
r = alloc_loaded_vmcs(&vmx->nested.vmcs02);
if (r < 0)
goto out_vmcs02;
loaded_vmcs_init(&vmx->nested.vmcs02);
if (cpu_has_vmx_msr_bitmap()) {
vmx->nested.msr_bitmap =
@ -8802,16 +8812,15 @@ static struct kvm_vcpu *vmx_create_vcpu(struct kvm *kvm, unsigned int id)
if (!vmx->guest_msrs)
goto free_pml;
vmx->loaded_vmcs = &vmx->vmcs01;
vmx->loaded_vmcs->vmcs = alloc_vmcs();
if (!vmx->loaded_vmcs->vmcs)
goto free_msrs;
if (!vmm_exclusive)
kvm_cpu_vmxon(__pa(per_cpu(vmxarea, raw_smp_processor_id())));
loaded_vmcs_init(vmx->loaded_vmcs);
err = alloc_loaded_vmcs(&vmx->vmcs01);
if (!vmm_exclusive)
kvm_cpu_vmxoff();
if (err < 0)
goto free_msrs;
vmx->loaded_vmcs = &vmx->vmcs01;
cpu = get_cpu();
vmx_vcpu_load(&vmx->vcpu, cpu);
vmx->vcpu.cpu = cpu;