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| author | Marc Zyngier <marc.zyngier@arm.com> | 2014-01-22 09:43:38 +0000 |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2014-03-03 01:15:23 +0000 |
| commit | ac30a11e8e92a03dbe236b285c5cbae0bf563141 (patch) | |
| tree | fe7e8a2493f46af06b0c59c18f71ab60562b3d15 /arch/arm/kvm | |
| parent | 547f781378a22b65c2ab468f235c23001b5924da (diff) | |
| download | linux-ac30a11e8e92a03dbe236b285c5cbae0bf563141.tar.bz2 | |
ARM: KVM: introduce per-vcpu HYP Configuration Register
So far, KVM/ARM used a fixed HCR configuration per guest, except for
the VI/VF/VA bits to control the interrupt in absence of VGIC.
With the upcoming need to dynamically reconfigure trapping, it becomes
necessary to allow the HCR to be changed on a per-vcpu basis.
The fix here is to mimic what KVM/arm64 already does: a per vcpu HCR
field, initialized at setup time.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm/kvm')
| -rw-r--r-- | arch/arm/kvm/guest.c | 1 | ||||
| -rw-r--r-- | arch/arm/kvm/interrupts_head.S | 9 |
2 files changed, 4 insertions, 6 deletions
diff --git a/arch/arm/kvm/guest.c b/arch/arm/kvm/guest.c index 2786eae10c0d..b23a59c1c522 100644 --- a/arch/arm/kvm/guest.c +++ b/arch/arm/kvm/guest.c @@ -38,6 +38,7 @@ struct kvm_stats_debugfs_item debugfs_entries[] = { int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) { + vcpu->arch.hcr = HCR_GUEST_MASK; return 0; } diff --git a/arch/arm/kvm/interrupts_head.S b/arch/arm/kvm/interrupts_head.S index 6f18695a09cb..a37270d7d4d6 100644 --- a/arch/arm/kvm/interrupts_head.S +++ b/arch/arm/kvm/interrupts_head.S @@ -597,17 +597,14 @@ vcpu .req r0 @ vcpu pointer always in r0 /* Enable/Disable: stage-2 trans., trap interrupts, trap wfi, trap smc */ .macro configure_hyp_role operation - mrc p15, 4, r2, c1, c1, 0 @ HCR - bic r2, r2, #HCR_VIRT_EXCP_MASK - ldr r3, =HCR_GUEST_MASK .if \operation == vmentry - orr r2, r2, r3 + ldr r2, [vcpu, #VCPU_HCR] ldr r3, [vcpu, #VCPU_IRQ_LINES] orr r2, r2, r3 .else - bic r2, r2, r3 + mov r2, #0 .endif - mcr p15, 4, r2, c1, c1, 0 + mcr p15, 4, r2, c1, c1, 0 @ HCR .endm .macro load_vcpu |