[PATCH v5 1/5] 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 | 49 +++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)

diff --git a/include/hyperv/hvgdk_mini.h b/include/hyperv/hvgdk_mini.h
index db3d1aaf7330..e8e3faa78e15 100644
--- a/include/hyperv/hvgdk_mini.h
+++ b/include/hyperv/hvgdk_mini.h
@@ -1068,6 +1068,35 @@ union hv_dispatch_suspend_register {
        } __packed;
 };
 
+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;
+};
+
 union hv_x64_interrupt_state_register {
        u64 as_uint64;
        struct {
@@ -1103,8 +1132,28 @@ union hv_register_value {
        union hv_explicit_suspend_register explicit_suspend;
        union hv_intercept_suspend_register intercept_suspend;
        union hv_dispatch_suspend_register dispatch_suspend;
+#ifdef CONFIG_ARM64
+       union hv_arm64_interrupt_state_register interrupt_state;
+       union hv_arm64_pending_interruption_register pending_interruption;
+#endif
+#ifdef CONFIG_X86
        union hv_x64_interrupt_state_register interrupt_state;
        union hv_x64_pending_interruption_register pending_interruption;
+#endif
+       union hv_arm64_pending_synthetic_exception_event 
pending_synthetic_exception_event;
+};
+
+/*
+ * NOTE: Linux helper struct - NOT from Hyper-V code.
+ * DECLARE_FLEX_ARRAY() needs to be wrapped into
+ * a structure and have at least one more member besides
+ * DECLARE_FLEX_ARRAY.
+ */
+struct hv_output_get_vp_registers {
+       struct {
+               DECLARE_FLEX_ARRAY(union hv_register_value, values);
+               struct {} values_end;
+       };
 };
 
 #if defined(CONFIG_ARM64)
-- 
2.34.1