diff options
| author | Marc Zyngier <marc.zyngier@arm.com> | 2016-01-02 15:07:13 +0000 |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2016-02-29 18:34:13 +0000 |
| commit | 3c29568768dfe6965ca51e1a78f9f31ebc0c500a (patch) | |
| tree | 567bdc926a71611b929ee2d093e60d5928138ac1 /arch/arm/kvm/hyp | |
| parent | 08dcbfda0774d5550447835f20a647b7e4c94481 (diff) | |
ARM: KVM: Add system register accessor macros
In order to move system register (CP15, mostly) access to C code,
add a few macros to facilitate this, and minimize the difference
between 32 and 64bit CP15 registers.
This will get heavily used in the following patches.
Acked-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'arch/arm/kvm/hyp')
| -rw-r--r-- | arch/arm/kvm/hyp/hyp.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/arm/kvm/hyp/hyp.h b/arch/arm/kvm/hyp/hyp.h index c72387073b09..727089f0ddb6 100644 --- a/arch/arm/kvm/hyp/hyp.h +++ b/arch/arm/kvm/hyp/hyp.h @@ -27,4 +27,19 @@ #define kern_hyp_va(v) (v) #define hyp_kern_va(v) (v) +#define __ACCESS_CP15(CRn, Op1, CRm, Op2) \ + "mrc", "mcr", __stringify(p15, Op1, %0, CRn, CRm, Op2), u32 +#define __ACCESS_CP15_64(Op1, CRm) \ + "mrrc", "mcrr", __stringify(p15, Op1, %Q0, %R0, CRm), u64 + +#define __write_sysreg(v, r, w, c, t) asm volatile(w " " c : : "r" ((t)(v))) +#define write_sysreg(v, ...) __write_sysreg(v, __VA_ARGS__) + +#define __read_sysreg(r, w, c, t) ({ \ + t __val; \ + asm volatile(r " " c : "=r" (__val)); \ + __val; \ +}) +#define read_sysreg(...) __read_sysreg(__VA_ARGS__) + #endif /* __ARM_KVM_HYP_H__ */ |