linux

iv/linux

History

Dongjiu Geng fd6c8c206f arm/arm64: KVM: set right LR register value for 32 bit guest when inject abort

When a exception is trapped to EL2, hardware uses  ELR_ELx to hold
the current fault instruction address. If KVM wants to inject a
abort to 32 bit guest, it needs to set the LR register for the
guest to emulate this abort happened in the guest. Because ARM32
architecture is pipelined execution, so the LR value has an offset to
the fault instruction address.

The offsets applied to Link value for exceptions as shown below,
which should be added for the ARM32 link register(LR).

Table taken from ARMv8 ARM DDI0487B-B, table G1-10:
Exception			Offset, for PE state of:
				A32 	  T32
Undefined Instruction 		+4 	  +2
Prefetch Abort 			+4 	  +4
Data Abort 			+8 	  +8
IRQ or FIQ 			+4 	  +4

  [ Removed unused variables in inject_abt to avoid compile warnings.
    -- Christoffer ]

Cc: <stable@vger.kernel.org>
Signed-off-by: Dongjiu Geng <gengdongjiu@huawei.com>
Tested-by: Haibin Zhang <zhanghaibin7@huawei.com>
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <cdall@linaro.org>

2017-10-21 17:03:15 +02:00

boot

Amlogic 64-bit DT updates for v4.14 (round 3)

2017-10-04 10:30:39 -07:00

configs

ARM/arm64: SoC platform updates for v4.14

2017-09-10 20:35:46 -07:00

crypto

crypto: arm64/aes - avoid expanded lookup tables in the final round

2017-08-04 09:27:26 +08:00

include

arm64: Use larger stacks when KASAN is selected