From: Paolo Bonzini pbonzini@redhat.com
(cherry picked from commit f21f165ef922c2146cc5bdc620f542953c41714b)
Group together the calls to alloc_vmcs and loaded_vmcs_init. Soon we'll also allocate an MSR bitmap there.
Cc: stable@vger.kernel.org # prereq for Spectre mitigation Signed-off-by: Paolo Bonzini pbonzini@redhat.com Signed-off-by: David Woodhouse dwmw@amazon.co.uk Signed-off-by: Yi Sun yi.y.sun@linux.intel.com [v4.4 backport]
Conflicts: arch/x86/kvm/vmx.c --- arch/x86/kvm/vmx.c | 35 ++++++++++++++++++++++------------- 1 file changed, 22 insertions(+), 13 deletions(-)
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 51eb175..b3e71a5 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -3342,11 +3342,6 @@ 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); @@ -3364,6 +3359,21 @@ 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; @@ -6684,6 +6694,7 @@ 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 @@ -6723,10 +6734,9 @@ 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 (enable_shadow_vmcs) { shadow_vmcs = alloc_vmcs(); @@ -8760,16 +8770,15 @@ 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;