From 360b948d88bf30ef4b10b693adf497f51fb46a08 Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Fri, 21 Feb 2014 09:55:56 +0100 Subject: [PATCH] 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 --- arch/x86/include/asm/kvm_host.h | 6 +++++- 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) -- 2.39.5