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KVM: nVMX: Fix some comment typos and coding style

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Fix some typos in the comments. Also fix coding style.
[Sean Christopherson rewrites the comment of write_fault_to_shadow_pgtable
field in struct kvm_vcpu_arch.]

Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Miaohe Lin 2020-02-07 23:22:45 +08:00 • committed by Paolo Bonzini
parent 7a02674d15
commit ffdbd50dca
2 changed files with 16 additions and 5 deletions
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16
arch/x86/include/asm/kvm_host.h
View file

@ -781,9 +781,19 @@ struct kvm_vcpu_arch {
u64 msr_kvm_poll_control;
/*
* Indicate whether the access faults on its page table in guest
* which is set when fix page fault and used to detect unhandeable
* instruction.
* Indicates the guest is trying to write a gfn that contains one or
* more of the PTEs used to translate the write itself, i.e. the access
* is changing its own translation in the guest page tables. KVM exits
* to userspace if emulation of the faulting instruction fails and this
* flag is set, as KVM cannot make forward progress.
*
* If emulation fails for a write to guest page tables, KVM unprotects
* (zaps) the shadow page for the target gfn and resumes the guest to
* retry the non-emulatable instruction (on hardware). Unprotecting the
* gfn doesn't allow forward progress for a self-changing access because
* doing so also zaps the translation for the gfn, i.e. retrying the
* instruction will hit a !PRESENT fault, which results in a new shadow
* page and sends KVM back to square one.
*/
bool write_fault_to_shadow_pgtable;

5
arch/x86/kvm/vmx/nested.c
View file

@ -544,7 +544,8 @@ static void nested_vmx_disable_intercept_for_msr(unsigned long *msr_bitmap_l1,
}
}
static inline void enable_x2apic_msr_intercepts(unsigned long *msr_bitmap) {
static inline void enable_x2apic_msr_intercepts(unsigned long *msr_bitmap)
{
int msr;
for (msr = 0x800; msr <= 0x8ff; msr += BITS_PER_LONG) {
@ -1981,7 +1982,7 @@ static int nested_vmx_handle_enlightened_vmptrld(struct kvm_vcpu *vcpu,
}
/*
* Clean fields data can't de used on VMLAUNCH and when we switch
* Clean fields data can't be used on VMLAUNCH and when we switch
* between different L2 guests as KVM keeps a single VMCS12 per L1.
*/
if (from_launch || evmcs_gpa_changed)