From 6ed6750f2b6d4a51f27615f3323d1850449299e3 Mon Sep 17 00:00:00 2001 From: Marc Zyngier Date: Thu, 29 Oct 2020 17:09:12 +0000 Subject: [PATCH] KVM: arm64: Add AArch32 mapping annotation In order to deal with the few AArch32 system registers that map to only a particular half of their AArch64 counterpart (such as DFAR and IFAR being colocated in FAR_EL1), let's add an optional annotation to the sysreg descriptor structure, indicating whether a register maps to the upper or lower 32bits of a register. Nothing is using these annotation yet. Signed-off-by: Marc Zyngier --- arch/arm64/kvm/sys_regs.h | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/arch/arm64/kvm/sys_regs.h b/arch/arm64/kvm/sys_regs.h index 5a6fc30..259864c 100644 --- a/arch/arm64/kvm/sys_regs.h +++ b/arch/arm64/kvm/sys_regs.h @@ -27,6 +27,12 @@ struct sys_reg_desc { /* Sysreg string for debug */ const char *name; + enum { + AA32_ZEROHIGH, + AA32_LO, + AA32_HI, + } aarch32_map; + /* MRS/MSR instruction which accesses it. */ u8 Op0; u8 Op1; @@ -153,6 +159,7 @@ const struct sys_reg_desc *find_reg_by_id(u64 id, const struct sys_reg_desc table[], unsigned int num); +#define AA32(_x) .aarch32_map = AA32_##_x #define Op0(_x) .Op0 = _x #define Op1(_x) .Op1 = _x #define CRn(_x) .CRn = _x -- 2.7.4