Michael Kelley <mikelley@xxxxxxxxxxxxx> writes:
> Add definitions for GetVpRegister and SetVpRegister hypercalls, which
> are implemented for both x86 and ARM64.
>
> Signed-off-by: Michael Kelley <mikelley@xxxxxxxxxxxxx>
> ---
> include/asm-generic/hyperv-tlfs.h | 28 ++++++++++++++++++++++++++++
> 1 file changed, 28 insertions(+)
>
> diff --git a/include/asm-generic/hyperv-tlfs.h b/include/asm-generic/hyperv-tlfs.h
> index 1f92ef92eb56..29b60f5b6323 100644
> --- a/include/asm-generic/hyperv-tlfs.h
> +++ b/include/asm-generic/hyperv-tlfs.h
> @@ -141,6 +141,8 @@ struct ms_hyperv_tsc_page {
> #define HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX 0x0013
> #define HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST_EX 0x0014
> #define HVCALL_SEND_IPI_EX 0x0015
> +#define HVCALL_GET_VP_REGISTERS 0x0050
> +#define HVCALL_SET_VP_REGISTERS 0x0051
> #define HVCALL_POST_MESSAGE 0x005c
> #define HVCALL_SIGNAL_EVENT 0x005d
> #define HVCALL_RETARGET_INTERRUPT 0x007e
> @@ -439,4 +441,30 @@ struct hv_retarget_device_interrupt {
> struct hv_device_interrupt_target int_target;
> } __packed __aligned(8);
>
> +
> +/* HvGetVPRegister hypercall */
Nit: 'HvGetVpRegisters' in TLFS
> +struct hv_get_vp_register_input {
Nit: I would also to name it 'hv_get_vp_registers_input' (plural, like
the hypercall).
> + u64 partitionid;
> + u32 vpindex;
> + u8 inputvtl;
> + u8 padding[3];
> + u32 name0;
> + u32 name1;
> +} __packed;
Isn't it a REP hypercall where we can we can pass a list? In that case
this should look like
struct hv_get_vp_registers_input {
struct {
u64 partitionid;
u32 vpindex;
u8 inputvtl;
u8 padding[3];
} header;
struct {
u32 name0;
u32 name1;
} elem[];
} __packed;
> +
> +struct hv_get_vp_register_output {
Ditto.
> + union {
> + struct {
> + u32 a;
> + u32 b;
> + u32 c;
> + u32 d;
> + } as32 __packed;
> + struct {
> + u64 low;
> + u64 high;
> + } as64 __packed;
> + };
> +};
I'm wondering why you define both
HVCALL_GET_VP_REGISTERS/HVCALL_SET_VP_REGISTERS but only add 'struct
hv_get_vp_register_input' and not 'struct hv_set_vp_register_input'.
The later should look similar, AFAIU it is:
struct hv_set_vp_registers_input {
struct {
u64 partitionid;
u32 vpindex;
u8 inputvtl;
u8 padding[3];
} header;
struct {
u32 name;
u32 padding1;
u64 padding2; //not sure this is not a mistake in TLFS
u64 regvallow;
u64 regvalhigh;
} elem[];
} __packed;
> +
> #endif
--
Vitaly
