From c5b2c0f5203b3bc678a8967daedf7114029975ae Mon Sep 17 00:00:00 2001 From: Marc Zyngier Date: Tue, 5 Nov 2013 18:29:46 +0000 Subject: [PATCH] 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 Signed-off-by: Catalin Marinas --- arch/arm64/kvm/hyp.S | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/arch/arm64/kvm/hyp.S b/arch/arm64/kvm/hyp.S index 1ac0bbb..3b47c36 100644 --- a/arch/arm64/kvm/hyp.S +++ b/arch/arm64/kvm/hyp.S @@ -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 -- 2.7.4