leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

ARM: KVM: Support vGICv3 ITS

Browse Source 
This patch allows to build and use vGICv3 ITS in 32-bit mode.

Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Vladimir Murzin 2016-11-02 11:55:34 +00:00 committed by Marc Zyngier
parent e29bd6f267
commit 2988509dd8
10 changed files with 11 additions and 41 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
Documentation/virtual/kvm/api.txt
View File

@ -2198,7 +2198,7 @@ after pausing the vcpu, but before it is resumed.
4.71 KVM_SIGNAL_MSI
Capability: KVM_CAP_SIGNAL_MSI
Architectures: x86 arm64
Architectures: x86 arm arm64
Type: vm ioctl
Parameters: struct kvm_msi (in)
Returns: >0 on delivery, 0 if guest blocked the MSI, and -1 on error

2
arch/arm/include/uapi/asm/kvm.h
View File

@ -87,9 +87,11 @@ struct kvm_regs {
/* Supported VGICv3 address types */
#define KVM_VGIC_V3_ADDR_TYPE_DIST 2
#define KVM_VGIC_V3_ADDR_TYPE_REDIST 3
#define KVM_VGIC_ITS_ADDR_TYPE 4
#define KVM_VGIC_V3_DIST_SIZE SZ_64K
#define KVM_VGIC_V3_REDIST_SIZE (2 * SZ_64K)
#define KVM_VGIC_V3_ITS_SIZE (2 * SZ_64K)
#define KVM_ARM_VCPU_POWER_OFF 0 /* CPU is started in OFF state */
#define KVM_ARM_VCPU_PSCI_0_2 1 /* CPU uses PSCI v0.2 */

1
arch/arm/kvm/Kconfig
View File

@ -34,6 +34,7 @@ config KVM
select HAVE_KVM_IRQFD
select HAVE_KVM_IRQCHIP
select HAVE_KVM_IRQ_ROUTING
select HAVE_KVM_MSI
depends on ARM_VIRT_EXT && ARM_LPAE && ARM_ARCH_TIMER
---help---
Support hosting virtualized guest machines.

1
arch/arm/kvm/Makefile
View File

@ -32,5 +32,6 @@ obj-y += $(KVM)/arm/vgic/vgic-mmio.o
obj-y += $(KVM)/arm/vgic/vgic-mmio-v2.o
obj-y += $(KVM)/arm/vgic/vgic-mmio-v3.o
obj-y += $(KVM)/arm/vgic/vgic-kvm-device.o
obj-y += $(KVM)/arm/vgic/vgic-its.o
obj-y += $(KVM)/irqchip.o
obj-y += $(KVM)/arm/arch_timer.o

6
arch/arm/kvm/arm.c
View File

@ -221,6 +221,12 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
case KVM_CAP_MAX_VCPUS:
r = KVM_MAX_VCPUS;
break;
case KVM_CAP_MSI_DEVID:
if (!kvm)
r = -EINVAL;
else
r = kvm->arch.vgic.msis_require_devid;
break;
default:
r = kvm_arch_dev_ioctl_check_extension(kvm, ext);
break;

4
arch/arm64/kvm/Kconfig
View File

@ -16,9 +16,6 @@ menuconfig VIRTUALIZATION
if VIRTUALIZATION
config KVM_ARM_VGIC_V3_ITS
bool
config KVM
bool "Kernel-based Virtual Machine (KVM) support"
depends on OF
@ -34,7 +31,6 @@ config KVM
select KVM_VFIO
select HAVE_KVM_EVENTFD
select HAVE_KVM_IRQFD
select KVM_ARM_VGIC_V3_ITS
select KVM_ARM_PMU if HW_PERF_EVENTS
select HAVE_KVM_MSI
select HAVE_KVM_IRQCHIP

6
arch/arm64/kvm/reset.c
View File

@ -86,12 +86,6 @@ int kvm_arch_dev_ioctl_check_extension(struct kvm *kvm, long ext)
case KVM_CAP_VCPU_ATTRIBUTES:
r = 1;
break;
case KVM_CAP_MSI_DEVID:
if (!kvm)
r = -EINVAL;
else
r = kvm->arch.vgic.msis_require_devid;
break;
default:
r = 0;
}

2
virt/kvm/arm/vgic/vgic-kvm-device.c
View File

@ -221,11 +221,9 @@ int kvm_register_vgic_device(unsigned long type)
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;
}

2
virt/kvm/arm/vgic/vgic-mmio-v3.c
View File

@ -42,7 +42,6 @@ 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;
@ -52,7 +51,6 @@ 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)

26
virt/kvm/arm/vgic/vgic.h
View File

@ -84,37 +84,11 @@ 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);
#else
static inline int vgic_register_its_iodevs(struct kvm *kvm)
{
return -ENODEV;
}
static inline bool vgic_has_its(struct kvm *kvm)
{
return false;
}
static inline int kvm_vgic_register_its_device(void)
{
return -ENODEV;
}
static inline void vgic_enable_lpis(struct kvm_vcpu *vcpu)
{
}
static inline int vgic_its_inject_msi(struct kvm *kvm, struct kvm_msi *msi)
{
return -ENODEV;
}
#endif
int kvm_register_vgic_device(unsigned long type);
int vgic_lazy_init(struct kvm *kvm);