[PATCH v2 1/3] hyperv: Define struct hv_output_get_vp_registers

[Roman Kisel]

There is no definition of the output structure for the
GetVpRegisters hypercall. Hence, using the hypercall
is not possible when the output value has some structure
to it. Even getting a datum of a primitive type reads
as ad-hoc without that definition.

Define struct hv_output_get_vp_registers to enable using
the GetVpRegisters hypercall. Make provisions for all
supported architectures. No functional changes.

Signed-off-by: Roman Kisel <rom...@linux.microsoft.com>
---
 include/hyperv/hvgdk_mini.h | 58 +++++++++++++++++++++++++++++++++++--
 1 file changed, 56 insertions(+), 2 deletions(-)

diff --git a/include/hyperv/hvgdk_mini.h b/include/hyperv/hvgdk_mini.h
index db3d1aaf7330..31c11550af73 100644
--- a/include/hyperv/hvgdk_mini.h
+++ b/include/hyperv/hvgdk_mini.h
@@ -781,6 +781,8 @@ struct hv_timer_message_payload {
        __u64 delivery_time;    /* When the message was delivered */
 } __packed;
 
+#if defined(CONFIG_X86)
+
 struct hv_x64_segment_register {
        u64 base;
        u32 limit;
@@ -807,6 +809,8 @@ struct hv_x64_table_register {
        u64 base;
 } __packed;
 
+#endif
+
 union hv_input_vtl {
        u8 as_uint8;
        struct {
@@ -1068,6 +1072,41 @@ union hv_dispatch_suspend_register {
        } __packed;
 };
 
+#if defined(CONFIG_ARM64)
+
+union hv_arm64_pending_interruption_register {
+       u64 as_uint64;
+       struct {
+               u64 interruption_pending : 1;
+               u64 interruption_type : 1;
+               u64 reserved : 30;
+               u32 error_code;
+       } __packed;
+};
+
+union hv_arm64_interrupt_state_register {
+       u64 as_uint64;
+       struct {
+               u64 interrupt_shadow : 1;
+               u64 reserved : 63;
+       } __packed;
+};
+
+union hv_arm64_pending_synthetic_exception_event {
+       u64 as_uint64[2];
+       struct {
+               u32 event_pending : 1;
+               u32 event_type : 3;
+               u32 reserved : 4;
+               u32 exception_type;
+               u64 context;
+       } __packed;
+};
+
+#endif
+
+#if defined(CONFIG_X86)
+
 union hv_x64_interrupt_state_register {
        u64 as_uint64;
        struct {
@@ -1091,6 +1130,8 @@ union hv_x64_pending_interruption_register {
        } __packed;
 };
 
+#endif
+
 union hv_register_value {
        struct hv_u128 reg128;
        u64 reg64;
@@ -1098,13 +1139,26 @@ union hv_register_value {
        u16 reg16;
        u8 reg8;
 
-       struct hv_x64_segment_register segment;
-       struct hv_x64_table_register table;
        union hv_explicit_suspend_register explicit_suspend;
        union hv_intercept_suspend_register intercept_suspend;
        union hv_dispatch_suspend_register dispatch_suspend;
+#if defined(CONFIG_X86)
+       struct hv_x64_segment_register segment;
+       struct hv_x64_table_register table;
        union hv_x64_interrupt_state_register interrupt_state;
        union hv_x64_pending_interruption_register pending_interruption;
+#elif defined(CONFIG_ARM64)
+       union hv_arm64_pending_interruption_register pending_interruption;
+       union hv_arm64_interrupt_state_register interrupt_state;
+       union hv_arm64_pending_synthetic_exception_event 
pending_synthetic_exception_event;
+#else
+       #error "This architecture is not supported"
+#endif
+};
+
+/* NOTE: Linux helper struct - NOT from Hyper-V code */
+struct hv_output_get_vp_registers {
+       DECLARE_FLEX_ARRAY(union hv_register_value, values);
 };
 
 #if defined(CONFIG_ARM64)
-- 
2.34.1