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| author |   Mohammed Gamal <mgamal@redhat.com> | 2020-07-10 17:48:03 +0200 |
|---|---|---|
| committer |   Paolo Bonzini <pbonzini@redhat.com> | 2020-07-10 13:07:28 -0400 |
| commit | 897861479c0640ed93ec82db78f8d839df32c4ac (patch) | |
| tree | aa634837e4caa13734f5e25800b727e2955e3787 /arch/x86/kvm/mmu.h | |
| parent | KVM: x86: drop superfluous mmu_check_root() from fast_pgd_switch() (diff) | |
| download | linux-dev-897861479c0640ed93ec82db78f8d839df32c4ac.tar.xz linux-dev-897861479c0640ed93ec82db78f8d839df32c4ac.zip | |
KVM: x86: Add helper functions for illegal GPA checking and page fault injection
This patch adds two helper functions that will be used to support virtualizing
MAXPHYADDR in both kvm-intel.ko and kvm.ko.
kvm_fixup_and_inject_pf_error() injects a page fault for a user-specified GVA,
while kvm_mmu_is_illegal_gpa() checks whether a GPA exceeds vCPU address limits.
Signed-off-by: Mohammed Gamal <mgamal@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20200710154811.418214-2-mgamal@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/mmu.h')
| -rw-r--r-- | arch/x86/kvm/mmu.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/x86/kvm/mmu.h b/arch/x86/kvm/mmu.h index 75125ae57e50..9f6554613bab 100644 --- a/arch/x86/kvm/mmu.h +++ b/arch/x86/kvm/mmu.h @@ -4,6 +4,7 @@ #include <linux/kvm_host.h> #include "kvm_cache_regs.h" +#include "cpuid.h" #define PT64_PT_BITS 9 #define PT64_ENT_PER_PAGE (1 << PT64_PT_BITS) @@ -150,6 +151,11 @@ static inline bool is_write_protection(struct kvm_vcpu *vcpu) return kvm_read_cr0_bits(vcpu, X86_CR0_WP); } +static inline bool kvm_mmu_is_illegal_gpa(struct kvm_vcpu *vcpu, gpa_t gpa) +{ + return (gpa >= BIT_ULL(cpuid_maxphyaddr(vcpu))); +} + /* * Check if a given access (described through the I/D, W/R and U/S bits of a * page fault error code pfec) causes a permission fault with the given PTE |