On Wed, Aug 27, 2025 at 4:07 AM Richard Henderson
<[email protected]> wrote:
>
> Conversion between KVM system registers ids and the HVF system
> register ids is trivial.
>
> Signed-off-by: Richard Henderson <[email protected]>
> ---
FYI: you sent this as [PATCH 4/7] and [PATCH 05/61] by accident,
happened to a few other patches in this series as well.
> target/arm/hvf/hvf.c | 20 ++++++++++++++++++++
> 1 file changed, 20 insertions(+)
>
> diff --git a/target/arm/hvf/hvf.c b/target/arm/hvf/hvf.c
> index f0e4b75e6a..2577dc1c0c 100644
> --- a/target/arm/hvf/hvf.c
> +++ b/target/arm/hvf/hvf.c
> @@ -403,6 +403,26 @@ struct hvf_sreg_match {
> uint32_t cp_idx;
> };
>
> +/*
> + * QEMU uses KVM system register ids in the migration format.
> + * Conveniently, HVF uses the same encoding of the op* and cr* parameters
> + * within the low 16 bits of the ids. Thus conversion between the
> + * formats is trivial.
> + */
> +
> +#define KVMID_TO_HVF(KVM) ((KVM) & 0xffff)
> +#define HVF_TO_KVMID(HVF) \
> + (CP_REG_ARM64 | CP_REG_SIZE_U64 | CP_REG_ARM64_SYSREG | (HVF))
> +
> +/* Verify this at compile-time. */
> +
> +#define DEF_SYSREG(HVF_ID, ...) \
> + QEMU_BUILD_BUG_ON(HVF_ID !=
> KVMID_TO_HVF(KVMID_AA64_SYS_REG64(__VA_ARGS__)));
> +
> +#include "sysreg.c.inc"
> +
> +#undef DEF_SYSREG
> +
> #define DEF_SYSREG(HVF_ID, crn, crm, op0, op1, op2) \
> { HVF_ID, HVF_SYSREG(crn, crm, op0, op1, op2) },
>
> --
> 2.43.0
>
>
