All of lore.kernel.org
 help / color / mirror / Atom feed
From: Jon Doron <arilou@gmail.com>
To: kvm@vger.kernel.org, linux-hyperv@vger.kernel.org
Cc: vkuznets@redhat.com, Jon Doron <arilou@gmail.com>
Subject: [PATCH v11 4/7] x86/kvm/hyper-v: Add support for synthetic debugger capability
Date: Fri, 24 Apr 2020 14:37:43 +0300	[thread overview]
Message-ID: <20200424113746.3473563-5-arilou@gmail.com> (raw)
In-Reply-To: <20200424113746.3473563-1-arilou@gmail.com>

Add support for Hyper-V synthetic debugger (syndbg) interface.
The syndbg interface is using MSRs to emulate a way to send/recv packets
data.

The debug transport dll (kdvm/kdnet) will identify if Hyper-V is enabled
and if it supports the synthetic debugger interface it will attempt to
use it, instead of trying to initialize a network adapter.

Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Jon Doron <arilou@gmail.com>
---
 Documentation/virt/kvm/api.rst  |  16 ++++
 arch/x86/include/asm/kvm_host.h |  14 +++
 arch/x86/kvm/hyperv.c           | 165 +++++++++++++++++++++++++++++++-
 arch/x86/kvm/hyperv.h           |   6 ++
 arch/x86/kvm/trace.h            |  51 ++++++++++
 arch/x86/kvm/x86.c              |  13 +++
 include/uapi/linux/kvm.h        |  11 +++
 7 files changed, 273 insertions(+), 3 deletions(-)

diff --git a/Documentation/virt/kvm/api.rst b/Documentation/virt/kvm/api.rst
index 750d005a75bc..52ba12758f7c 100644
--- a/Documentation/virt/kvm/api.rst
+++ b/Documentation/virt/kvm/api.rst
@@ -5066,6 +5066,7 @@ EOI was received.
 		struct kvm_hyperv_exit {
   #define KVM_EXIT_HYPERV_SYNIC          1
   #define KVM_EXIT_HYPERV_HCALL          2
+  #define KVM_EXIT_HYPERV_SYNDBG         3
 			__u32 type;
 			__u32 pad1;
 			union {
@@ -5081,6 +5082,15 @@ EOI was received.
 					__u64 result;
 					__u64 params[2];
 				} hcall;
+				struct {
+					__u32 msr;
+					__u32 pad2;
+					__u64 control;
+					__u64 status;
+					__u64 send_page;
+					__u64 recv_page;
+					__u64 pending_page;
+				} syndbg;
 			} u;
 		};
 		/* KVM_EXIT_HYPERV */
@@ -5097,6 +5107,12 @@ Hyper-V SynIC state change. Notification is used to remap SynIC
 event/message pages and to enable/disable SynIC messages/events processing
 in userspace.
 
+	- KVM_EXIT_HYPERV_SYNDBG -- synchronously notify user-space about
+
+Hyper-V Synthetic debugger state change. Notification is used to either update
+the pending_page location or to send a control command (send the buffer located
+in send_page or recv a buffer to recv_page).
+
 ::
 
 		/* KVM_EXIT_ARM_NISV */
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 42a2d0d3984a..563a9e69f113 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -854,6 +854,19 @@ struct kvm_apic_map {
 	struct kvm_lapic *phys_map[];
 };
 
+/* Hyper-V synthetic debugger (SynDbg)*/
+struct kvm_hv_syndbg {
+	struct {
+		u64 control;
+		u64 status;
+		u64 send_page;
+		u64 recv_page;
+		u64 pending_page;
+	} control;
+	u64 options;
+	bool active;
+};
+
 /* Hyper-V emulation context */
 struct kvm_hv {
 	struct mutex hv_lock;
@@ -877,6 +890,7 @@ struct kvm_hv {
 	atomic_t num_mismatched_vp_indexes;
 
 	struct hv_partition_assist_pg *hv_pa_pg;
+	struct kvm_hv_syndbg hv_syndbg;
 };
 
 enum kvm_irqchip_mode {
diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c
index ab3e9dbcabbe..435516595090 100644
--- a/arch/x86/kvm/hyperv.c
+++ b/arch/x86/kvm/hyperv.c
@@ -266,6 +266,117 @@ static int synic_set_msr(struct kvm_vcpu_hv_synic *synic,
 	return ret;
 }
 
+void kvm_hv_activate_syndbg(struct kvm_vcpu *vcpu)
+{
+	struct kvm_hv_syndbg *syndbg = vcpu_to_hv_syndbg(vcpu);
+
+	syndbg->active = true;
+}
+
+static int kvm_hv_syndbg_complete_userspace(struct kvm_vcpu *vcpu)
+{
+	struct kvm *kvm = vcpu->kvm;
+	struct kvm_hv *hv = &kvm->arch.hyperv;
+
+	if (vcpu->run->hyperv.u.syndbg.msr == HV_X64_MSR_SYNDBG_CONTROL)
+		hv->hv_syndbg.control.status =
+			vcpu->run->hyperv.u.syndbg.status;
+	return 1;
+}
+
+static void syndbg_exit(struct kvm_vcpu *vcpu, u32 msr)
+{
+	struct kvm_hv_syndbg *syndbg = vcpu_to_hv_syndbg(vcpu);
+	struct kvm_vcpu_hv *hv_vcpu = &vcpu->arch.hyperv;
+
+	hv_vcpu->exit.type = KVM_EXIT_HYPERV_SYNDBG;
+	hv_vcpu->exit.u.syndbg.msr = msr;
+	hv_vcpu->exit.u.syndbg.control = syndbg->control.control;
+	hv_vcpu->exit.u.syndbg.send_page = syndbg->control.send_page;
+	hv_vcpu->exit.u.syndbg.recv_page = syndbg->control.recv_page;
+	hv_vcpu->exit.u.syndbg.pending_page = syndbg->control.pending_page;
+	vcpu->arch.complete_userspace_io =
+			kvm_hv_syndbg_complete_userspace;
+
+	kvm_make_request(KVM_REQ_HV_EXIT, vcpu);
+}
+
+static int syndbg_set_msr(struct kvm_vcpu *vcpu, u32 msr, u64 data, bool host)
+{
+	struct kvm_hv_syndbg *syndbg = vcpu_to_hv_syndbg(vcpu);
+
+	if (!syndbg->active && !host)
+		return 1;
+
+	trace_kvm_hv_syndbg_set_msr(vcpu->vcpu_id,
+				    vcpu_to_hv_vcpu(vcpu)->vp_index, msr, data);
+	switch (msr) {
+	case HV_X64_MSR_SYNDBG_CONTROL:
+		syndbg->control.control = data;
+		if (!host)
+			syndbg_exit(vcpu, msr);
+		break;
+	case HV_X64_MSR_SYNDBG_STATUS:
+		syndbg->control.status = data;
+		break;
+	case HV_X64_MSR_SYNDBG_SEND_BUFFER:
+		syndbg->control.send_page = data;
+		break;
+	case HV_X64_MSR_SYNDBG_RECV_BUFFER:
+		syndbg->control.recv_page = data;
+		break;
+	case HV_X64_MSR_SYNDBG_PENDING_BUFFER:
+		syndbg->control.pending_page = data;
+		if (!host)
+			syndbg_exit(vcpu, msr);
+		break;
+	case HV_X64_MSR_SYNDBG_OPTIONS:
+		syndbg->options = data;
+		break;
+	default:
+		break;
+	}
+
+	return 0;
+}
+
+static int syndbg_get_msr(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata, bool host)
+{
+	struct kvm_hv_syndbg *syndbg = vcpu_to_hv_syndbg(vcpu);
+
+	if (!syndbg->active && !host)
+		return 1;
+
+	switch (msr) {
+	case HV_X64_MSR_SYNDBG_CONTROL:
+		*pdata = syndbg->control.control;
+		break;
+	case HV_X64_MSR_SYNDBG_STATUS:
+		*pdata = syndbg->control.status;
+		break;
+	case HV_X64_MSR_SYNDBG_SEND_BUFFER:
+		*pdata = syndbg->control.send_page;
+		break;
+	case HV_X64_MSR_SYNDBG_RECV_BUFFER:
+		*pdata = syndbg->control.recv_page;
+		break;
+	case HV_X64_MSR_SYNDBG_PENDING_BUFFER:
+		*pdata = syndbg->control.pending_page;
+		break;
+	case HV_X64_MSR_SYNDBG_OPTIONS:
+		*pdata = syndbg->options;
+		break;
+	default:
+		break;
+	}
+
+	trace_kvm_hv_syndbg_get_msr(vcpu->vcpu_id,
+				    vcpu_to_hv_vcpu(vcpu)->vp_index, msr,
+				    *pdata);
+
+	return 0;
+}
+
 static int synic_get_msr(struct kvm_vcpu_hv_synic *synic, u32 msr, u64 *pdata,
 			 bool host)
 {
@@ -800,6 +911,8 @@ static bool kvm_hv_msr_partition_wide(u32 msr)
 	case HV_X64_MSR_REENLIGHTENMENT_CONTROL:
 	case HV_X64_MSR_TSC_EMULATION_CONTROL:
 	case HV_X64_MSR_TSC_EMULATION_STATUS:
+	case HV_X64_MSR_SYNDBG_OPTIONS:
+	case HV_X64_MSR_SYNDBG_CONTROL ... HV_X64_MSR_SYNDBG_PENDING_BUFFER:
 		r = true;
 		break;
 	}
@@ -1061,6 +1174,9 @@ static int kvm_hv_set_msr_pw(struct kvm_vcpu *vcpu, u32 msr, u64 data,
 		if (!host)
 			return 1;
 		break;
+	case HV_X64_MSR_SYNDBG_OPTIONS:
+	case HV_X64_MSR_SYNDBG_CONTROL ... HV_X64_MSR_SYNDBG_PENDING_BUFFER:
+		return syndbg_set_msr(vcpu, msr, data, host);
 	default:
 		vcpu_unimpl(vcpu, "Hyper-V unhandled wrmsr: 0x%x data 0x%llx\n",
 			    msr, data);
@@ -1190,7 +1306,8 @@ static int kvm_hv_set_msr(struct kvm_vcpu *vcpu, u32 msr, u64 data, bool host)
 	return 0;
 }
 
-static int kvm_hv_get_msr_pw(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
+static int kvm_hv_get_msr_pw(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata,
+			     bool host)
 {
 	u64 data = 0;
 	struct kvm *kvm = vcpu->kvm;
@@ -1227,6 +1344,9 @@ static int kvm_hv_get_msr_pw(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
 	case HV_X64_MSR_TSC_EMULATION_STATUS:
 		data = hv->hv_tsc_emulation_status;
 		break;
+	case HV_X64_MSR_SYNDBG_OPTIONS:
+	case HV_X64_MSR_SYNDBG_CONTROL ... HV_X64_MSR_SYNDBG_PENDING_BUFFER:
+		return syndbg_get_msr(vcpu, msr, pdata, host);
 	default:
 		vcpu_unimpl(vcpu, "Hyper-V unhandled rdmsr: 0x%x\n", msr);
 		return 1;
@@ -1316,7 +1436,7 @@ int kvm_hv_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata, bool host)
 		int r;
 
 		mutex_lock(&vcpu->kvm->arch.hyperv.hv_lock);
-		r = kvm_hv_get_msr_pw(vcpu, msr, pdata);
+		r = kvm_hv_get_msr_pw(vcpu, msr, pdata, host);
 		mutex_unlock(&vcpu->kvm->arch.hyperv.hv_lock);
 		return r;
 	} else
@@ -1799,9 +1919,16 @@ static struct kvm_cpuid_entry2 evmcs_cpuid_entries[] = {
 	{ .function = HYPERV_CPUID_NESTED_FEATURES },
 };
 
+static struct kvm_cpuid_entry2 syndbg_cpuid_entries[] = {
+	{ .function = HYPERV_CPUID_SYNDBG_VENDOR_AND_MAX_FUNCTIONS },
+	{ .function = HYPERV_CPUID_SYNDBG_INTERFACE },
+	{ .function = HYPERV_CPUID_SYNDBG_PLATFORM_CAPABILITIES	},
+};
+
 #define HV_MAX_CPUID_ENTRIES \
 	(ARRAY_SIZE(core_cpuid_entries) +\
-	 ARRAY_SIZE(evmcs_cpuid_entries))
+	 ARRAY_SIZE(evmcs_cpuid_entries) +\
+	 ARRAY_SIZE(syndbg_cpuid_entries))
 
 int kvm_vcpu_ioctl_get_hv_cpuid(struct kvm_vcpu *vcpu, struct kvm_cpuid2 *cpuid,
 				struct kvm_cpuid_entry2 __user *entries)
@@ -1809,6 +1936,7 @@ int kvm_vcpu_ioctl_get_hv_cpuid(struct kvm_vcpu *vcpu, struct kvm_cpuid2 *cpuid,
 	uint16_t evmcs_ver = 0;
 	struct kvm_cpuid_entry2 cpuid_entries[HV_MAX_CPUID_ENTRIES];
 	int i, nent = 0;
+	struct kvm_hv_syndbg *syndbg = vcpu_to_hv_syndbg(vcpu);
 
 	/* Set the core cpuid entries required for Hyper-V */
 	memcpy(&cpuid_entries[nent], &core_cpuid_entries,
@@ -1825,6 +1953,13 @@ int kvm_vcpu_ioctl_get_hv_cpuid(struct kvm_vcpu *vcpu, struct kvm_cpuid2 *cpuid,
 		nent += ARRAY_SIZE(evmcs_cpuid_entries);
 	}
 
+	if (syndbg->active) {
+		/* Syndbg is enabled, add the required Syndbg CPUID leafs */
+		memcpy(&cpuid_entries[nent], &syndbg_cpuid_entries,
+		       sizeof(syndbg_cpuid_entries));
+		nent += ARRAY_SIZE(syndbg_cpuid_entries);
+	}
+
 	if (cpuid->nent < nent)
 		return -E2BIG;
 
@@ -1878,6 +2013,12 @@ int kvm_vcpu_ioctl_get_hv_cpuid(struct kvm_vcpu *vcpu, struct kvm_cpuid2 *cpuid,
 			ent->edx |= HV_FEATURE_FREQUENCY_MSRS_AVAILABLE;
 			ent->edx |= HV_FEATURE_GUEST_CRASH_MSR_AVAILABLE;
 
+			if (syndbg->active) {
+				ent->ebx |= HV_X64_DEBUGGING;
+				ent->edx |= HV_X64_GUEST_DEBUGGING_AVAILABLE;
+				ent->edx |= HV_FEATURE_DEBUG_MSRS_AVAILABLE;
+			}
+
 			/*
 			 * Direct Synthetic timers only make sense with in-kernel
 			 * LAPIC
@@ -1921,6 +2062,24 @@ int kvm_vcpu_ioctl_get_hv_cpuid(struct kvm_vcpu *vcpu, struct kvm_cpuid2 *cpuid,
 
 			break;
 
+		case HYPERV_CPUID_SYNDBG_VENDOR_AND_MAX_FUNCTIONS:
+			memcpy(signature, "Linux KVM Hv", 12);
+
+			ent->eax = 0;
+			ent->ebx = signature[0];
+			ent->ecx = signature[1];
+			ent->edx = signature[2];
+			break;
+
+		case HYPERV_CPUID_SYNDBG_INTERFACE:
+			memcpy(signature, "VS#1\0\0\0\0\0\0\0\0", 12);
+			ent->eax = signature[0];
+			break;
+
+		case HYPERV_CPUID_SYNDBG_PLATFORM_CAPABILITIES:
+			ent->eax |= HV_X64_SYNDBG_CAP_ALLOW_KERNEL_DEBUGGING;
+			break;
+
 		default:
 			break;
 		}
diff --git a/arch/x86/kvm/hyperv.h b/arch/x86/kvm/hyperv.h
index 7f50ff0bad07..50cca85b5e48 100644
--- a/arch/x86/kvm/hyperv.h
+++ b/arch/x86/kvm/hyperv.h
@@ -73,6 +73,11 @@ static inline struct kvm_vcpu *synic_to_vcpu(struct kvm_vcpu_hv_synic *synic)
 	return hv_vcpu_to_vcpu(container_of(synic, struct kvm_vcpu_hv, synic));
 }
 
+static inline struct kvm_hv_syndbg *vcpu_to_hv_syndbg(struct kvm_vcpu *vcpu)
+{
+	return &vcpu->kvm->arch.hyperv.hv_syndbg;
+}
+
 int kvm_hv_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data, bool host);
 int kvm_hv_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata, bool host);
 
@@ -83,6 +88,7 @@ void kvm_hv_irq_routing_update(struct kvm *kvm);
 int kvm_hv_synic_set_irq(struct kvm *kvm, u32 vcpu_id, u32 sint);
 void kvm_hv_synic_send_eoi(struct kvm_vcpu *vcpu, int vector);
 int kvm_hv_activate_synic(struct kvm_vcpu *vcpu, bool dont_zero_synic_pages);
+void kvm_hv_activate_syndbg(struct kvm_vcpu *vcpu);
 
 void kvm_hv_vcpu_init(struct kvm_vcpu *vcpu);
 void kvm_hv_vcpu_postcreate(struct kvm_vcpu *vcpu);
diff --git a/arch/x86/kvm/trace.h b/arch/x86/kvm/trace.h
index 249062f24b94..df95c45ec3bb 100644
--- a/arch/x86/kvm/trace.h
+++ b/arch/x86/kvm/trace.h
@@ -1539,6 +1539,57 @@ TRACE_EVENT(kvm_nested_vmenter_failed,
 		__print_symbolic(__entry->err, VMX_VMENTER_INSTRUCTION_ERRORS))
 );
 
+/*
+ * Tracepoint for syndbg_set_msr.
+ */
+TRACE_EVENT(kvm_hv_syndbg_set_msr,
+	TP_PROTO(int vcpu_id, u32 vp_index, u32 msr, u64 data),
+	TP_ARGS(vcpu_id, vp_index, msr, data),
+
+	TP_STRUCT__entry(
+		__field(int, vcpu_id)
+		__field(u32, vp_index)
+		__field(u32, msr)
+		__field(u64, data)
+	),
+
+	TP_fast_assign(
+		__entry->vcpu_id = vcpu_id;
+		__entry->vp_index = vp_index;
+		__entry->msr = msr;
+		__entry->data = data;
+	),
+
+	TP_printk("vcpu_id %d vp_index %u msr 0x%x data 0x%llx",
+		  __entry->vcpu_id, __entry->vp_index, __entry->msr,
+		  __entry->data)
+);
+
+/*
+ * Tracepoint for syndbg_get_msr.
+ */
+TRACE_EVENT(kvm_hv_syndbg_get_msr,
+	TP_PROTO(int vcpu_id, u32 vp_index, u32 msr, u64 data),
+	TP_ARGS(vcpu_id, vp_index, msr, data),
+
+	TP_STRUCT__entry(
+		__field(int, vcpu_id)
+		__field(u32, vp_index)
+		__field(u32, msr)
+		__field(u64, data)
+	),
+
+	TP_fast_assign(
+		__entry->vcpu_id = vcpu_id;
+		__entry->vp_index = vp_index;
+		__entry->msr = msr;
+		__entry->data = data;
+	),
+
+	TP_printk("vcpu_id %d vp_index %u msr 0x%x data 0x%llx",
+		  __entry->vcpu_id, __entry->vp_index, __entry->msr,
+		  __entry->data)
+);
 #endif /* _TRACE_KVM_H */
 
 #undef TRACE_INCLUDE_PATH
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 3bf2ecafd027..28b304be5419 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -1241,6 +1241,10 @@ static const u32 emulated_msrs_all[] = {
 	HV_X64_MSR_VP_ASSIST_PAGE,
 	HV_X64_MSR_REENLIGHTENMENT_CONTROL, HV_X64_MSR_TSC_EMULATION_CONTROL,
 	HV_X64_MSR_TSC_EMULATION_STATUS,
+	HV_X64_MSR_SYNDBG_OPTIONS,
+	HV_X64_MSR_SYNDBG_CONTROL, HV_X64_MSR_SYNDBG_STATUS,
+	HV_X64_MSR_SYNDBG_SEND_BUFFER, HV_X64_MSR_SYNDBG_RECV_BUFFER,
+	HV_X64_MSR_SYNDBG_PENDING_BUFFER,
 
 	MSR_KVM_ASYNC_PF_EN, MSR_KVM_STEAL_TIME,
 	MSR_KVM_PV_EOI_EN,
@@ -2940,6 +2944,8 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
 		 */
 		break;
 	case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15:
+	case HV_X64_MSR_SYNDBG_CONTROL ... HV_X64_MSR_SYNDBG_PENDING_BUFFER:
+	case HV_X64_MSR_SYNDBG_OPTIONS:
 	case HV_X64_MSR_CRASH_P0 ... HV_X64_MSR_CRASH_P4:
 	case HV_X64_MSR_CRASH_CTL:
 	case HV_X64_MSR_STIMER0_CONFIG ... HV_X64_MSR_STIMER3_COUNT:
@@ -3184,6 +3190,8 @@ int kvm_get_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
 		msr_info->data = 0x20000000;
 		break;
 	case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15:
+	case HV_X64_MSR_SYNDBG_CONTROL ... HV_X64_MSR_SYNDBG_PENDING_BUFFER:
+	case HV_X64_MSR_SYNDBG_OPTIONS:
 	case HV_X64_MSR_CRASH_P0 ... HV_X64_MSR_CRASH_P4:
 	case HV_X64_MSR_CRASH_CTL:
 	case HV_X64_MSR_STIMER0_CONFIG ... HV_X64_MSR_STIMER3_COUNT:
@@ -3355,6 +3363,7 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
 	case KVM_CAP_HYPERV_TLBFLUSH:
 	case KVM_CAP_HYPERV_SEND_IPI:
 	case KVM_CAP_HYPERV_CPUID:
+	case KVM_CAP_HYPERV_SYNDBG:
 	case KVM_CAP_PCI_SEGMENT:
 	case KVM_CAP_DEBUGREGS:
 	case KVM_CAP_X86_ROBUST_SINGLESTEP:
@@ -4209,6 +4218,10 @@ static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
 		return -EINVAL;
 
 	switch (cap->cap) {
+	case KVM_CAP_HYPERV_SYNDBG:
+		kvm_hv_activate_syndbg(vcpu);
+		return 0;
+
 	case KVM_CAP_HYPERV_SYNIC2:
 		if (cap->args[0])
 			return -EINVAL;
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
index 9cdc5356f542..ec1b2c7b449e 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h
@@ -188,6 +188,7 @@ struct kvm_s390_cmma_log {
 struct kvm_hyperv_exit {
 #define KVM_EXIT_HYPERV_SYNIC          1
 #define KVM_EXIT_HYPERV_HCALL          2
+#define KVM_EXIT_HYPERV_SYNDBG         3
 	__u32 type;
 	__u32 pad1;
 	union {
@@ -203,6 +204,15 @@ struct kvm_hyperv_exit {
 			__u64 result;
 			__u64 params[2];
 		} hcall;
+		struct {
+			__u32 msr;
+			__u32 pad2;
+			__u64 control;
+			__u64 status;
+			__u64 send_page;
+			__u64 recv_page;
+			__u64 pending_page;
+		} syndbg;
 	} u;
 };
 
@@ -1019,6 +1029,7 @@ struct kvm_ppc_resize_hpt {
 #define KVM_CAP_S390_VCPU_RESETS 179
 #define KVM_CAP_S390_PROTECTED 180
 #define KVM_CAP_PPC_SECURE_GUEST 181
+#define KVM_CAP_HYPERV_SYNDBG 182
 
 #ifdef KVM_CAP_IRQ_ROUTING
 
-- 
2.24.1


  parent reply	other threads:[~2020-04-24 11:38 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-24 11:37 [PATCH v11 0/7] x86/kvm/hyper-v: add support for synthetic debugger Jon Doron
2020-04-24 11:37 ` [PATCH v11 1/7] x86/kvm/hyper-v: Explicitly align hcall param for kvm_hyperv_exit Jon Doron
2020-05-13  8:42   ` Roman Kagan
2020-04-24 11:37 ` [PATCH v11 2/7] x86/kvm/hyper-v: Simplify addition for custom cpuid leafs Jon Doron
2020-05-13  9:24   ` Roman Kagan
2020-05-13 12:49     ` Jon Doron
2020-05-29 11:13       ` Paolo Bonzini
2020-04-24 11:37 ` [PATCH v11 3/7] x86/hyper-v: Add synthetic debugger definitions Jon Doron
2020-04-24 11:37 ` Jon Doron [this message]
2020-05-29 10:46   ` [PATCH v11 4/7] x86/kvm/hyper-v: Add support for synthetic debugger capability Paolo Bonzini
2020-05-29 12:08     ` Vitaly Kuznetsov
2020-05-29 12:17       ` Paolo Bonzini
2020-04-24 11:37 ` [PATCH v11 5/7] x86/kvm/hyper-v: enable hypercalls without hypercall page with syndbg Jon Doron
2020-05-13  9:57   ` Roman Kagan
2020-05-13 12:37     ` Jon Doron
2020-05-29 10:48   ` Paolo Bonzini
2020-04-24 11:37 ` [PATCH v11 6/7] x86/kvm/hyper-v: Add support for synthetic debugger via hypercalls Jon Doron
2020-05-12 15:33   ` Roman Kagan
2020-05-13 12:39     ` Jon Doron
2020-04-24 11:37 ` [PATCH v11 7/7] KVM: selftests: update hyperv_cpuid with SynDBG tests Jon Doron
2020-05-07  3:01 ` [PATCH v11 0/7] x86/kvm/hyper-v: add support for synthetic debugger Jon Doron
2020-05-07  7:57   ` Paolo Bonzini

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20200424113746.3473563-5-arilou@gmail.com \
    --to=arilou@gmail.com \
    --cc=kvm@vger.kernel.org \
    --cc=linux-hyperv@vger.kernel.org \
    --cc=vkuznets@redhat.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.