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KVM: VMX: Make VMCS configuration/capabilities structs read-only after init

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Tag vmcs_config and vmx_capability structs as __init, the canonical
configuration is generated during hardware_setup() and must never be
modified after that point.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20221130230934.1014142-31-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Sean Christopherson 2022-11-30 23:09:14 +00:00 committed by Paolo Bonzini
parent a578a0a9e3
commit 58ca193031
2 changed files with 4 additions and 4 deletions
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4
arch/x86/kvm/vmx/capabilities.h
View File

@ -66,13 +66,13 @@ struct vmcs_config {
u64 misc;
struct nested_vmx_msrs nested;
};
extern struct vmcs_config vmcs_config;
extern struct vmcs_config vmcs_config __ro_after_init;
struct vmx_capability {
u32 ept;
u32 vpid;
};
extern struct vmx_capability vmx_capability;
extern struct vmx_capability vmx_capability __ro_after_init;
static inline bool cpu_has_vmx_basic_inout(void)
{

4
arch/x86/kvm/vmx/vmx.c
View File

@ -488,8 +488,8 @@ static DEFINE_PER_CPU(struct list_head, loaded_vmcss_on_cpu);
static DECLARE_BITMAP(vmx_vpid_bitmap, VMX_NR_VPIDS);
static DEFINE_SPINLOCK(vmx_vpid_lock);
struct vmcs_config vmcs_config;
struct vmx_capability vmx_capability;
struct vmcs_config vmcs_config __ro_after_init;
struct vmx_capability vmx_capability __ro_after_init;
#define VMX_SEGMENT_FIELD(seg) \
[VCPU_SREG_##seg] = { \