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authorMarc Zyngier <Marc.Zyngier@arm.com>2013-11-05 18:29:46 +0000
committerCatalin Marinas <catalin.marinas@arm.com>2013-11-06 10:10:12 +0000
commitc5b2c0f5203b3bc678a8967daedf7114029975ae (patch)
treef4dcca6fb18d3bfd81dbcf00e417599f8ed99c1b /arch/arm64
parent18ea3dbc9e5c8a53a361b17c4a5676ea6f4bcb72 (diff)
downloadlinux-c5b2c0f5203b3bc678a8967daedf7114029975ae.tar.bz2
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>
Diffstat (limited to 'arch/arm64')
-rw-r--r--arch/arm64/kvm/hyp.S13
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/arm64/kvm/hyp.S b/arch/arm64/kvm/hyp.S
index 1ac0bbbdddb2..3b47c36e10ff 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