[PATCH v2 3/9] KVM: x86: implement KVM_CAP_SET_GUEST_DEBUG2
From: Maxim Levitsky <hidden>
Date: 2021-04-01 18:22:05
Also in:
kvm, kvmarm, linux-arm-kernel, linux-s390, lkml
Subsystem:
kernel virtual machine for x86 (kvm/x86), the rest, x86 architecture (32-bit and 64-bit) · Maintainers:
Sean Christopherson, Paolo Bonzini, Linus Torvalds, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen
Store the supported bits into KVM_GUESTDBG_VALID_MASK macro, similar to how arm does this. Signed-off-by: Maxim Levitsky <redacted> --- arch/x86/include/asm/kvm_host.h | 9 +++++++++ arch/x86/kvm/x86.c | 2 ++ 2 files changed, 11 insertions(+)
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index a52f973bdff6..cc7c82a449d5 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h@@ -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
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index a9d95f90a048..956e8e0bd6af 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c@@ -3798,6 +3798,8 @@ 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 |
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2.26.2