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KVM: x86: implement KVM_CAP_SET_GUEST_DEBUG2

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Store the supported bits into KVM_GUESTDBG_VALID_MASK
macro, similar to how arm does this.

Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Message-Id: <20210401135451.1004564-4-mlevitsk@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Maxim Levitsky 2021-04-01 16:54:45 +03:00 committed by Paolo Bonzini
parent 8b13c36493
commit 7e582ccbbd
2 changed files with 11 additions and 0 deletions
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9
arch/x86/include/asm/kvm_host.h
View file

@ -221,6 +221,15 @@ enum x86_intercept_stage;
#define DR7_FIXED_1 0x00000400
#define DR7_VOLATILE 0xffff2bff
#define KVM_GUESTDBG_VALID_MASK \
(KVM_GUESTDBG_ENABLE | \
KVM_GUESTDBG_SINGLESTEP | \
KVM_GUESTDBG_USE_HW_BP | \
KVM_GUESTDBG_USE_SW_BP | \
KVM_GUESTDBG_INJECT_BP | \
KVM_GUESTDBG_INJECT_DB)
#define PFERR_PRESENT_BIT 0
#define PFERR_WRITE_BIT 1
#define PFERR_USER_BIT 2

2
arch/x86/kvm/x86.c
View file

@ -3804,6 +3804,8 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
case KVM_CAP_ENFORCE_PV_FEATURE_CPUID:
r = 1;
break;
case KVM_CAP_SET_GUEST_DEBUG2:
return KVM_GUESTDBG_VALID_MASK;
#ifdef CONFIG_KVM_XEN
case KVM_CAP_XEN_HVM:
r = KVM_XEN_HVM_CONFIG_HYPERCALL_MSR |