diff options
| author | Paolo Bonzini <pbonzini@redhat.com> | 2014-02-21 12:55:56 +0400 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2014-03-11 13:46:02 +0400 |
| commit | 360b948d88bf30ef4b10b693adf497f51fb46a08 (patch) | |
| tree | e79afd2bdca00c83a32e40bd771ad66756bcc787 /arch/x86 | |
| parent | c845f9c646e646e6a5fe416c2e835342984249f7 (diff) | |
| download | linux-360b948d88bf30ef4b10b693adf497f51fb46a08.tar.xz | |
KVM: x86: change vcpu->arch.switch_db_regs to a bit mask
The next patch will add another bit that we can test with the
same "if".
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/include/asm/kvm_host.h | 6 | ||||
| -rw-r--r-- | arch/x86/kvm/x86.c | 4 |
2 files changed, 8 insertions, 2 deletions
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 7930c294182a..35f538bda3a9 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -337,6 +337,10 @@ struct kvm_pmu { u64 reprogram_pmi; }; +enum { + KVM_DEBUGREG_BP_ENABLED = 1, +}; + struct kvm_vcpu_arch { /* * rip and regs accesses must go through @@ -463,7 +467,7 @@ struct kvm_vcpu_arch { struct mtrr_state_type mtrr_state; u32 pat; - int switch_db_regs; + unsigned switch_db_regs; unsigned long db[KVM_NR_DB_REGS]; unsigned long dr6; unsigned long dr7; diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 622312176f28..85c74e7df2df 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -759,7 +759,9 @@ static void kvm_update_dr7(struct kvm_vcpu *vcpu) else dr7 = vcpu->arch.dr7; kvm_x86_ops->set_dr7(vcpu, dr7); - vcpu->arch.switch_db_regs = (dr7 & DR7_BP_EN_MASK); + vcpu->arch.switch_db_regs &= ~KVM_DEBUGREG_BP_ENABLED; + if (dr7 & DR7_BP_EN_MASK) + vcpu->arch.switch_db_regs |= KVM_DEBUGREG_BP_ENABLED; } static int __kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val) |