drivers/hv: Move struct hv_message into UAPI Hyper-V x86 header

This struct is required for Hyper-V SynIC timers implementation inside KVM
and for upcoming Hyper-V VMBus support by userspace(QEMU). So place it into
Hyper-V UAPI header.

Signed-off-by: Andrey Smetanin <asmetanin@virtuozzo.com>
Acked-by: K. Y. Srinivasan <kys@microsoft.com>
Reviewed-by: Roman Kagan <rkagan@virtuozzo.com>
CC: Gleb Natapov <gleb@kernel.org>
CC: Paolo Bonzini <pbonzini@redhat.com>
CC: "K. Y. Srinivasan" <kys@microsoft.com>
CC: Haiyang Zhang <haiyangz@microsoft.com>
CC: Vitaly Kuznetsov <vkuznets@redhat.com>
CC: Roman Kagan <rkagan@virtuozzo.com>
CC: Denis V. Lunev <den@openvz.org>
CC: qemu-devel@nongnu.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 76 insertions, 0 deletions

diff --git a/arch/x86/include/uapi/asm/hyperv.h b/arch/x86/include/uapi/asm/hyperv.h
index 07981f085b92..a41cdee88adb 100644
--- a/arch/x86/include/uapi/asm/hyperv.h
+++ b/arch/x86/include/uapi/asm/hyperv.h
@@ -271,4 +271,80 @@ typedef struct _HV_REFERENCE_TSC_PAGE {
 
 #define HV_SYNIC_STIMER_COUNT           (4)
 
+/* Define synthetic interrupt controller message constants. */
+#define HV_MESSAGE_SIZE                 (256)
+#define HV_MESSAGE_PAYLOAD_BYTE_COUNT   (240)
+#define HV_MESSAGE_PAYLOAD_QWORD_COUNT  (30)
+
+/* Define hypervisor message types. */
+enum hv_message_type {
+        HVMSG_NONE                      = 0x00000000,
+
+        /* Memory access messages. */
+        HVMSG_UNMAPPED_GPA              = 0x80000000,
+        HVMSG_GPA_INTERCEPT             = 0x80000001,
+
+        /* Timer notification messages. */
+        HVMSG_TIMER_EXPIRED                     = 0x80000010,
+
+        /* Error messages. */
+        HVMSG_INVALID_VP_REGISTER_VALUE = 0x80000020,
+        HVMSG_UNRECOVERABLE_EXCEPTION   = 0x80000021,
+        HVMSG_UNSUPPORTED_FEATURE               = 0x80000022,
+
+        /* Trace buffer complete messages. */
+        HVMSG_EVENTLOG_BUFFERCOMPLETE   = 0x80000040,
+
+        /* Platform-specific processor intercept messages. */
+        HVMSG_X64_IOPORT_INTERCEPT              = 0x80010000,
+        HVMSG_X64_MSR_INTERCEPT         = 0x80010001,
+        HVMSG_X64_CPUID_INTERCEPT               = 0x80010002,
+        HVMSG_X64_EXCEPTION_INTERCEPT   = 0x80010003,
+        HVMSG_X64_APIC_EOI                      = 0x80010004,
+        HVMSG_X64_LEGACY_FP_ERROR               = 0x80010005
+};
+
+/* Define synthetic interrupt controller message flags. */
+union hv_message_flags {
+        __u8 asu8;
+        struct {
+                __u8 msg_pending:1;
+                __u8 reserved:7;
+        };
+};
+
+/* Define port identifier type. */
+union hv_port_id {
+        __u32 asu32;
+        struct {
+                __u32 id:24;
+                __u32 reserved:8;
+        } u;
+};
+
+/* Define synthetic interrupt controller message header. */
+struct hv_message_header {
+        __u32 message_type;
+        __u8 payload_size;
+        union hv_message_flags message_flags;
+        __u8 reserved[2];
+        union {
+                __u64 sender;
+                union hv_port_id port;
+        };
+};
+
+/* Define synthetic interrupt controller message format. */
+struct hv_message {
+        struct hv_message_header header;
+        union {
+                __u64 payload[HV_MESSAGE_PAYLOAD_QWORD_COUNT];
+        } u;
+};
+
+/* Define the synthetic interrupt message page layout. */
+struct hv_message_page {
+        struct hv_message sint_message[HV_SYNIC_SINT_COUNT];
+};
+
 #endif