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arm64: KVM: vgic: byteswap GICv2 access on world switch if BE 

Ensure that accesses to the GICH_* registers are byteswapped
when the kernel is compiled as big-endian.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Marc Zyngier 2013-11-05 18:29:46 +00:00 committed by Catalin Marinas
parent 18ea3dbc9e
commit c5b2c0f520
1 changed files with 13 additions and 0 deletions
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13
arch/arm64/kvm/hyp.S
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@ -403,6 +403,14 @@ __kvm_hyp_code_start:
ldr w9, [x2, #GICH_ELRSR0]
ldr w10, [x2, #GICH_ELRSR1]
ldr w11, [x2, #GICH_APR]
CPU_BE( rev w4, w4 )
CPU_BE( rev w5, w5 )
CPU_BE( rev w6, w6 )
CPU_BE( rev w7, w7 )
CPU_BE( rev w8, w8 )
CPU_BE( rev w9, w9 )
CPU_BE( rev w10, w10 )
CPU_BE( rev w11, w11 )
str w4, [x3, #VGIC_CPU_HCR]
str w5, [x3, #VGIC_CPU_VMCR]
@ -421,6 +429,7 @@ __kvm_hyp_code_start:
ldr w4, [x3, #VGIC_CPU_NR_LR]
add x3, x3, #VGIC_CPU_LR
1: ldr w5, [x2], #4
CPU_BE( rev w5, w5 )
str w5, [x3], #4
sub w4, w4, #1
cbnz w4, 1b
@ -446,6 +455,9 @@ __kvm_hyp_code_start:
ldr w4, [x3, #VGIC_CPU_HCR]
ldr w5, [x3, #VGIC_CPU_VMCR]
ldr w6, [x3, #VGIC_CPU_APR]
CPU_BE( rev w4, w4 )
CPU_BE( rev w5, w5 )
CPU_BE( rev w6, w6 )
str w4, [x2, #GICH_HCR]
str w5, [x2, #GICH_VMCR]
@ -456,6 +468,7 @@ __kvm_hyp_code_start:
ldr w4, [x3, #VGIC_CPU_NR_LR]
add x3, x3, #VGIC_CPU_LR
1: ldr w5, [x3], #4
CPU_BE( rev w5, w5 )
str w5, [x2], #4
sub w4, w4, #1
cbnz w4, 1b