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target/arm/hvf: Add KVMID_TO_HVF, HVF_TO_KVMID

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Conversion between KVM system registers ids and the HVF system
register ids is trivial.

Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Richard Henderson 2025-09-16 07:22:06 -07:00 • committed by Peter Maydell
parent 8da60618b6
commit 7d4d89a437
1 changed files with 20 additions and 0 deletions
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20
target/arm/hvf/hvf.c
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@ -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, op0, op1, crn, crm, op2) \
{ HVF_ID, HVF_SYSREG(crn, crm, op0, op1, op2) },