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KVM: SVM: Add manipulation functions for exception intercepts

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This patch wraps changes to the exception intercepts of SVM
into seperate functions to abstract nested-svm better and
prepare the implementation of the vmcb-clean-bits feature.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Joerg Roedel 2010-11-30 18:03:59 +01:00 committed by Avi Kivity
parent 3aed041a4c
commit 18c918c5f5
1 changed files with 29 additions and 29 deletions
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58
arch/x86/kvm/svm.c
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@ -259,6 +259,24 @@ static inline void clr_dr_intercept(struct vcpu_svm *svm, int bit)
recalc_intercepts(svm);
}
static inline void set_exception_intercept(struct vcpu_svm *svm, int bit)
{
struct vmcb *vmcb = get_host_vmcb(svm);
vmcb->control.intercept_exceptions |= (1U << bit);
recalc_intercepts(svm);
}
static inline void clr_exception_intercept(struct vcpu_svm *svm, int bit)
{
struct vmcb *vmcb = get_host_vmcb(svm);
vmcb->control.intercept_exceptions &= ~(1U << bit);
recalc_intercepts(svm);
}
static inline void enable_gif(struct vcpu_svm *svm)
{
svm->vcpu.arch.hflags |= HF_GIF_MASK;
@ -841,10 +859,9 @@ static void init_vmcb(struct vcpu_svm *svm)
set_dr_intercept(svm, INTERCEPT_DR6_WRITE);
set_dr_intercept(svm, INTERCEPT_DR7_WRITE);
control->intercept_exceptions = (1 << PF_VECTOR) |
(1 << UD_VECTOR) |
(1 << MC_VECTOR);
set_exception_intercept(svm, PF_VECTOR);
set_exception_intercept(svm, UD_VECTOR);
set_exception_intercept(svm, MC_VECTOR);
control->intercept = (1ULL << INTERCEPT_INTR) |
(1ULL << INTERCEPT_NMI) |
@ -921,7 +938,7 @@ static void init_vmcb(struct vcpu_svm *svm)
control->nested_ctl = 1;
control->intercept &= ~((1ULL << INTERCEPT_TASK_SWITCH) |
(1ULL << INTERCEPT_INVLPG));
control->intercept_exceptions &= ~(1 << PF_VECTOR);
clr_exception_intercept(svm, PF_VECTOR);
clr_cr_intercept(svm, INTERCEPT_CR3_READ);
clr_cr_intercept(svm, INTERCEPT_CR3_WRITE);
save->g_pat = 0x0007040600070406ULL;
@ -1382,20 +1399,18 @@ static void update_db_intercept(struct kvm_vcpu *vcpu)
{
struct vcpu_svm *svm = to_svm(vcpu);
svm->vmcb->control.intercept_exceptions &=
~((1 << DB_VECTOR) | (1 << BP_VECTOR));
clr_exception_intercept(svm, DB_VECTOR);
clr_exception_intercept(svm, BP_VECTOR);
if (svm->nmi_singlestep)
svm->vmcb->control.intercept_exceptions |= (1 << DB_VECTOR);
set_exception_intercept(svm, DB_VECTOR);
if (vcpu->guest_debug & KVM_GUESTDBG_ENABLE) {
if (vcpu->guest_debug &
(KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP))
svm->vmcb->control.intercept_exceptions |=
1 << DB_VECTOR;
set_exception_intercept(svm, DB_VECTOR);
if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP)
svm->vmcb->control.intercept_exceptions |=
1 << BP_VECTOR;
set_exception_intercept(svm, BP_VECTOR);
} else
vcpu->guest_debug = 0;
}
@ -1516,21 +1531,8 @@ static int ud_interception(struct vcpu_svm *svm)
static void svm_fpu_activate(struct kvm_vcpu *vcpu)
{
struct vcpu_svm *svm = to_svm(vcpu);
u32 excp;
if (is_guest_mode(vcpu)) {
u32 h_excp, n_excp;
h_excp = svm->nested.hsave->control.intercept_exceptions;
n_excp = svm->nested.intercept_exceptions;
h_excp &= ~(1 << NM_VECTOR);
excp = h_excp | n_excp;
} else {
excp = svm->vmcb->control.intercept_exceptions;
excp &= ~(1 << NM_VECTOR);
}
svm->vmcb->control.intercept_exceptions = excp;
clr_exception_intercept(svm, NM_VECTOR);
svm->vcpu.fpu_active = 1;
update_cr0_intercept(svm);
@ -3643,9 +3645,7 @@ static void svm_fpu_deactivate(struct kvm_vcpu *vcpu)
{
struct vcpu_svm *svm = to_svm(vcpu);
svm->vmcb->control.intercept_exceptions |= 1 << NM_VECTOR;
if (is_guest_mode(vcpu))
svm->nested.hsave->control.intercept_exceptions |= 1 << NM_VECTOR;
set_exception_intercept(svm, NM_VECTOR);
update_cr0_intercept(svm);
}