summaryrefslogtreecommitdiff
path: root/arch/arm/kvm
diff options
context:
space:
mode:
authorMarc Zyngier <marc.zyngier@arm.com>2015-06-11 18:50:17 +0100
committerMarc Zyngier <marc.zyngier@arm.com>2015-06-17 09:59:55 +0100
commit4642019dc4457486223e1fb75a6a4cba6e0e903a (patch)
tree5bf3859158f850815b990e6ab8c57376d4748250 /arch/arm/kvm
parentf5a202db12b42aef9543029934681df019d7b749 (diff)
arm/arm64: KVM: vgic: Do not save GICH_HCR / ICH_HCR_EL2
The GIC Hypervisor Configuration Register is used to enable the delivery of virtual interupts to a guest, as well as to define in which conditions maintenance interrupts are delivered to the host. This register doesn't contain any information that we need to read back (the EOIcount is utterly useless for us). So let's save ourselves some cycles, and not save it before writing zero to it. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'arch/arm/kvm')
-rw-r--r--arch/arm/kvm/interrupts_head.S3
1 files changed, 0 insertions, 3 deletions
diff --git a/arch/arm/kvm/interrupts_head.S b/arch/arm/kvm/interrupts_head.S
index 48efe2ee452c..702740d37465 100644
--- a/arch/arm/kvm/interrupts_head.S
+++ b/arch/arm/kvm/interrupts_head.S
@@ -412,7 +412,6 @@ vcpu .req r0 @ vcpu pointer always in r0
add r11, vcpu, #VCPU_VGIC_CPU
/* Save all interesting registers */
- ldr r3, [r2, #GICH_HCR]
ldr r4, [r2, #GICH_VMCR]
ldr r5, [r2, #GICH_MISR]
ldr r6, [r2, #GICH_EISR0]
@@ -420,7 +419,6 @@ vcpu .req r0 @ vcpu pointer always in r0
ldr r8, [r2, #GICH_ELRSR0]
ldr r9, [r2, #GICH_ELRSR1]
ldr r10, [r2, #GICH_APR]
-ARM_BE8(rev r3, r3 )
ARM_BE8(rev r4, r4 )
ARM_BE8(rev r5, r5 )
ARM_BE8(rev r6, r6 )
@@ -429,7 +427,6 @@ ARM_BE8(rev r8, r8 )
ARM_BE8(rev r9, r9 )
ARM_BE8(rev r10, r10 )
- str r3, [r11, #VGIC_V2_CPU_HCR]
str r4, [r11, #VGIC_V2_CPU_VMCR]
str r5, [r11, #VGIC_V2_CPU_MISR]
#ifdef CONFIG_CPU_ENDIAN_BE8