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| author | Sean Christopherson <seanjc@google.com> | 2024-02-09 14:07:52 -0800 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2024-02-22 16:14:47 -0800 |
| commit | 2a5f091ce1c9222fc9f98374d92db9539e6004ae (patch) | |
| tree | ca55b97b7852cb1ee2ad57a397aa04c7b32cac5a /arch/x86/kvm/x86.c | |
| parent | fc5375dd8c062d81001b50008d65ca09e942f924 (diff) | |
| download | linux-stable-2a5f091ce1c9222fc9f98374d92db9539e6004ae.tar.gz linux-stable-2a5f091ce1c9222fc9f98374d92db9539e6004ae.tar.bz2 linux-stable-2a5f091ce1c9222fc9f98374d92db9539e6004ae.zip | |
KVM: x86: Open code all direct reads to guest DR6 and DR7
Bite the bullet, and open code all direct reads of DR6 and DR7. KVM
currently has a mix of open coded accesses and calls to kvm_get_dr(),
which is confusing and ugly because there's no rhyme or reason as to why
any particular chunk of code uses kvm_get_dr().
The obvious alternative is to force all accesses through kvm_get_dr(),
but it's not at all clear that doing so would be a net positive, e.g. even
if KVM ends up wanting/needing to force all reads through a common helper,
e.g. to play caching games, the cost of reverting this change is likely
lower than the ongoing cost of maintaining weird, arbitrary code.
No functional change intended.
Cc: Mathias Krause <minipli@grsecurity.net>
Reviewed-by: Mathias Krause <minipli@grsecurity.net>
Link: https://lore.kernel.org/r/20240209220752.388160-3-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Diffstat (limited to 'arch/x86/kvm/x86.c')
| -rw-r--r-- | arch/x86/kvm/x86.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index b195eb21639c..f97e443ce853 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -5514,7 +5514,7 @@ static void kvm_vcpu_ioctl_x86_get_debugregs(struct kvm_vcpu *vcpu, for (i = 0; i < ARRAY_SIZE(vcpu->arch.db); i++) dbgregs->db[i] = vcpu->arch.db[i]; - dbgregs->dr6 = kvm_get_dr(vcpu, 6); + dbgregs->dr6 = vcpu->arch.dr6; dbgregs->dr7 = vcpu->arch.dr7; } |