hyperv: Add definitions for syndbg

Add all required definitions for hyperv synthetic debugger interface.

Signed-off-by: Jon Doron <arilou@gmail.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Message-Id: <20220216102500.692781-3-arilou@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

2 files changed, 89 insertions, 0 deletions

diff --git a/include/hw/hyperv/hyperv-proto.h b/include/hw/hyperv/hyperv-proto.h
index 21dc28aee9..4a2297307b 100644
--- a/include/hw/hyperv/hyperv-proto.h
+++ b/include/hw/hyperv/hyperv-proto.h
@@ -24,12 +24,17 @@
 #define HV_STATUS_INVALID_PORT_ID             17
 #define HV_STATUS_INVALID_CONNECTION_ID       18
 #define HV_STATUS_INSUFFICIENT_BUFFERS        19
+#define HV_STATUS_NOT_ACKNOWLEDGED            20
+#define HV_STATUS_NO_DATA                     27
 
 /*
  * Hypercall numbers
  */
 #define HV_POST_MESSAGE                       0x005c
 #define HV_SIGNAL_EVENT                       0x005d
+#define HV_POST_DEBUG_DATA                    0x0069
+#define HV_RETRIEVE_DEBUG_DATA                0x006a
+#define HV_RESET_DEBUG_SESSION                0x006b
 #define HV_HYPERCALL_FAST                     (1u << 16)
 
 /*
@@ -127,4 +132,51 @@ struct hyperv_event_flags_page {
     struct hyperv_event_flags slot[HV_SINT_COUNT];
 };
 
+/*
+ * Kernel debugger structures
+ */
+
+/* Options flags for hyperv_reset_debug_session */
+#define HV_DEBUG_PURGE_INCOMING_DATA        0x00000001
+#define HV_DEBUG_PURGE_OUTGOING_DATA        0x00000002
+struct hyperv_reset_debug_session_input {
+    uint32_t options;
+} __attribute__ ((__packed__));
+
+struct hyperv_reset_debug_session_output {
+    uint32_t host_ip;
+    uint32_t target_ip;
+    uint16_t host_port;
+    uint16_t target_port;
+    uint8_t host_mac[6];
+    uint8_t target_mac[6];
+} __attribute__ ((__packed__));
+
+/* Options for hyperv_post_debug_data */
+#define HV_DEBUG_POST_LOOP                  0x00000001
+
+struct hyperv_post_debug_data_input {
+    uint32_t count;
+    uint32_t options;
+    /*uint8_t data[HV_HYP_PAGE_SIZE - 2 * sizeof(uint32_t)];*/
+} __attribute__ ((__packed__));
+
+struct hyperv_post_debug_data_output {
+    uint32_t pending_count;
+} __attribute__ ((__packed__));
+
+/* Options for hyperv_retrieve_debug_data */
+#define HV_DEBUG_RETRIEVE_LOOP              0x00000001
+#define HV_DEBUG_RETRIEVE_TEST_ACTIVITY     0x00000002
+
+struct hyperv_retrieve_debug_data_input {
+    uint32_t count;
+    uint32_t options;
+    uint64_t timeout;
+} __attribute__ ((__packed__));
+
+struct hyperv_retrieve_debug_data_output {
+    uint32_t retrieved_count;
+    uint32_t remaining_count;
+} __attribute__ ((__packed__));
 #endif
diff --git a/target/i386/kvm/hyperv-proto.h b/target/i386/kvm/hyperv-proto.h
index 89f81afda7..e40e59411c 100644
--- a/target/i386/kvm/hyperv-proto.h
+++ b/target/i386/kvm/hyperv-proto.h
@@ -19,6 +19,9 @@
 #define HV_CPUID_ENLIGHTMENT_INFO             0x40000004
 #define HV_CPUID_IMPLEMENT_LIMITS             0x40000005
 #define HV_CPUID_NESTED_FEATURES              0x4000000A
+#define HV_CPUID_SYNDBG_VENDOR_AND_MAX_FUNCTIONS    0x40000080
+#define HV_CPUID_SYNDBG_INTERFACE                   0x40000081
+#define HV_CPUID_SYNDBG_PLATFORM_CAPABILITIES       0x40000082
 #define HV_CPUID_MIN                          0x40000005
 #define HV_CPUID_MAX                          0x4000ffff
 #define HV_HYPERVISOR_PRESENT_BIT             0x80000000
@@ -55,9 +58,15 @@
 #define HV_GUEST_IDLE_STATE_AVAILABLE           (1u << 5)
 #define HV_FREQUENCY_MSRS_AVAILABLE             (1u << 8)
 #define HV_GUEST_CRASH_MSR_AVAILABLE            (1u << 10)
+#define HV_FEATURE_DEBUG_MSRS_AVAILABLE         (1u << 11)
 #define HV_STIMER_DIRECT_MODE_AVAILABLE         (1u << 19)
 
 /*
+ * HV_CPUID_FEATURES.EBX bits
+ */
+#define HV_PARTITION_DEBUGGING_ALLOWED          (1u << 12)
+
+/*
  * HV_CPUID_ENLIGHTMENT_INFO.EAX bits
  */
 #define HV_AS_SWITCH_RECOMMENDED            (1u << 0)
@@ -73,6 +82,11 @@
 #define HV_NO_NONARCH_CORESHARING           (1u << 18)
 
 /*
+ * HV_CPUID_SYNDBG_PLATFORM_CAPABILITIES.EAX bits
+ */
+#define HV_SYNDBG_CAP_ALLOW_KERNEL_DEBUGGING    (1u << 1)
+
+/*
  * Basic virtualized MSRs
  */
 #define HV_X64_MSR_GUEST_OS_ID                0x40000000
@@ -131,6 +145,18 @@
 #define HV_X64_MSR_STIMER3_COUNT                0x400000B7
 
 /*
+ * Hyper-V Synthetic debug options MSR
+ */
+#define HV_X64_MSR_SYNDBG_CONTROL               0x400000F1
+#define HV_X64_MSR_SYNDBG_STATUS                0x400000F2
+#define HV_X64_MSR_SYNDBG_SEND_BUFFER           0x400000F3
+#define HV_X64_MSR_SYNDBG_RECV_BUFFER           0x400000F4
+#define HV_X64_MSR_SYNDBG_PENDING_BUFFER        0x400000F5
+#define HV_X64_MSR_SYNDBG_OPTIONS               0x400000FF
+
+#define HV_X64_SYNDBG_OPTION_USE_HCALLS         BIT(2)
+
+/*
  * Guest crash notification MSRs
  */
 #define HV_X64_MSR_CRASH_P0                     0x40000100
@@ -168,5 +194,16 @@
 
 #define HV_STIMER_COUNT                       4
 
+/*
+ * Synthetic debugger control definitions
+ */
+#define HV_SYNDBG_CONTROL_SEND              (1u << 0)
+#define HV_SYNDBG_CONTROL_RECV              (1u << 1)
+#define HV_SYNDBG_CONTROL_SEND_SIZE(ctl)    ((ctl >> 16) & 0xffff)
+#define HV_SYNDBG_STATUS_INVALID            (0)
+#define HV_SYNDBG_STATUS_SEND_SUCCESS       (1u << 0)
+#define HV_SYNDBG_STATUS_RECV_SUCCESS       (1u << 2)
+#define HV_SYNDBG_STATUS_RESET              (1u << 3)
+#define HV_SYNDBG_STATUS_SET_SIZE(st, sz)   (st | (sz << 16))
 
 #endif