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author | Marc Zyngier <marc.zyngier@arm.com> | 2014-01-21 10:55:17 (GMT) |
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committer | Marc Zyngier <marc.zyngier@arm.com> | 2014-03-03 01:15:21 (GMT) |
commit | 2072d29c46b73e39b3c6c56c6027af77086f45fd (patch) | |
tree | 9c4bbaef5d8fdd56aab396aa46670763271ec3ea /arch/arm64/kvm/sys_regs.h | |
parent | 2d58b733c87689d3d5144e4ac94ea861cc729145 (diff) | |
download | linux-2072d29c46b73e39b3c6c56c6027af77086f45fd.tar.xz |
arm64: KVM: allows discrimination of AArch32 sysreg access
The current handling of AArch32 trapping is slightly less than
perfect, as it is not possible (from a handler point of view)
to distinguish it from an AArch64 access, nor to tell a 32bit
from a 64bit access either.
Fix this by introducing two additional flags:
- is_aarch32: true if the access was made in AArch32 mode
- is_32bit: true if is_aarch32 == true and a MCR/MRC instruction
was used to perform the access (as opposed to MCRR/MRRC).
This allows a handler to cover all the possible conditions in which
a system register gets trapped.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Acked-by: Christoffer Dall <christoffer.dall@linaro.org>
Diffstat (limited to 'arch/arm64/kvm/sys_regs.h')
-rw-r--r-- | arch/arm64/kvm/sys_regs.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm64/kvm/sys_regs.h b/arch/arm64/kvm/sys_regs.h index d50d372..d411e25 100644 --- a/arch/arm64/kvm/sys_regs.h +++ b/arch/arm64/kvm/sys_regs.h @@ -30,6 +30,8 @@ struct sys_reg_params { u8 Op2; u8 Rt; bool is_write; + bool is_aarch32; + bool is_32bit; /* Only valid if is_aarch32 is true */ }; struct sys_reg_desc { |