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authorVladimir Murzin <vladimir.murzin@arm.com>2016-09-12 15:49:18 +0100
committerChristoffer Dall <christoffer.dall@linaro.org>2016-09-22 13:21:47 +0200
commit7a1ff708286045a6664fbda716fd3cf8d63afadb (patch)
treee6d1273222732175e82e9f7ac7d94c90b6733300
parent19f0ece4395470b24826fc090de2795ecc9cf4a0 (diff)
downloadop-kernel-dev-7a1ff708286045a6664fbda716fd3cf8d63afadb.zip
op-kernel-dev-7a1ff708286045a6664fbda716fd3cf8d63afadb.tar.gz
KVM: arm64: vgic-its: Introduce config option to guard ITS specific code
By now ITS code guarded with KVM_ARM_VGIC_V3 config option which was introduced to hide everything specific to vgic-v3 from 32-bit world. We are going to support vgic-v3 in 32-bit world and KVM_ARM_VGIC_V3 will gone, but we don't have support for ITS there yet and we need to continue keeping ITS away. Introduce the new config option to prevent ITS code being build in 32-bit mode when support for vgic-v3 is done. Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com> Acked-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
-rw-r--r--arch/arm64/kvm/Kconfig4
-rw-r--r--virt/kvm/arm/vgic/vgic-kvm-device.c3
-rw-r--r--virt/kvm/arm/vgic/vgic-mmio-v3.c2
-rw-r--r--virt/kvm/arm/vgic/vgic.h4
4 files changed, 13 insertions, 0 deletions
diff --git a/arch/arm64/kvm/Kconfig b/arch/arm64/kvm/Kconfig
index 9c9edc9..7ba9164 100644
--- a/arch/arm64/kvm/Kconfig
+++ b/arch/arm64/kvm/Kconfig
@@ -16,6 +16,9 @@ menuconfig VIRTUALIZATION
if VIRTUALIZATION
+config KVM_ARM_VGIC_V3_ITS
+ bool
+
config KVM_ARM_VGIC_V3
bool
@@ -35,6 +38,7 @@ config KVM
select HAVE_KVM_EVENTFD
select HAVE_KVM_IRQFD
select KVM_ARM_VGIC_V3
+ select KVM_ARM_VGIC_V3_ITS
select KVM_ARM_PMU if HW_PERF_EVENTS
select HAVE_KVM_MSI
select HAVE_KVM_IRQCHIP
diff --git a/virt/kvm/arm/vgic/vgic-kvm-device.c b/virt/kvm/arm/vgic/vgic-kvm-device.c
index 163b057..89ef9bc 100644
--- a/virt/kvm/arm/vgic/vgic-kvm-device.c
+++ b/virt/kvm/arm/vgic/vgic-kvm-device.c
@@ -223,9 +223,12 @@ int kvm_register_vgic_device(unsigned long type)
case KVM_DEV_TYPE_ARM_VGIC_V3:
ret = kvm_register_device_ops(&kvm_arm_vgic_v3_ops,
KVM_DEV_TYPE_ARM_VGIC_V3);
+
+#ifdef CONFIG_KVM_ARM_VGIC_V3_ITS
if (ret)
break;
ret = kvm_vgic_register_its_device();
+#endif
break;
#endif
}
diff --git a/virt/kvm/arm/vgic/vgic-mmio-v3.c b/virt/kvm/arm/vgic/vgic-mmio-v3.c
index 90d8181..acbe691 100644
--- a/virt/kvm/arm/vgic/vgic-mmio-v3.c
+++ b/virt/kvm/arm/vgic/vgic-mmio-v3.c
@@ -42,6 +42,7 @@ u64 update_64bit_reg(u64 reg, unsigned int offset, unsigned int len,
return reg | ((u64)val << lower);
}
+#ifdef CONFIG_KVM_ARM_VGIC_V3_ITS
bool vgic_has_its(struct kvm *kvm)
{
struct vgic_dist *dist = &kvm->arch.vgic;
@@ -51,6 +52,7 @@ bool vgic_has_its(struct kvm *kvm)
return dist->has_its;
}
+#endif
static unsigned long vgic_mmio_read_v3_misc(struct kvm_vcpu *vcpu,
gpa_t addr, unsigned int len)
diff --git a/virt/kvm/arm/vgic/vgic.h b/virt/kvm/arm/vgic/vgic.h
index 6c4625c..100045f 100644
--- a/virt/kvm/arm/vgic/vgic.h
+++ b/virt/kvm/arm/vgic/vgic.h
@@ -84,11 +84,15 @@ void vgic_v3_enable(struct kvm_vcpu *vcpu);
int vgic_v3_probe(const struct gic_kvm_info *info);
int vgic_v3_map_resources(struct kvm *kvm);
int vgic_register_redist_iodevs(struct kvm *kvm, gpa_t dist_base_address);
+
+#ifdef CONFIG_KVM_ARM_VGIC_V3_ITS
int vgic_register_its_iodevs(struct kvm *kvm);
bool vgic_has_its(struct kvm *kvm);
int kvm_vgic_register_its_device(void);
void vgic_enable_lpis(struct kvm_vcpu *vcpu);
int vgic_its_inject_msi(struct kvm *kvm, struct kvm_msi *msi);
+#endif
+
#else
static inline void vgic_v3_process_maintenance(struct kvm_vcpu *vcpu)
{
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