[PATCH 09/15] KVM: ARM: Inject IRQs and FIQs from userspace
From: Will Deacon <hidden>
Date: 2012-09-25 15:55:05
Also in:
kvm
On Sat, Sep 15, 2012 at 04:35:27PM +0100, Christoffer Dall wrote:
quoted hunk ↗ jump to hunk
diff --git a/arch/arm/include/asm/kvm.h b/arch/arm/include/asm/kvm.h index a13b582..131e632 100644 --- a/arch/arm/include/asm/kvm.h +++ b/arch/arm/include/asm/kvm.h@@ -22,6 +22,7 @@ #include <asm/types.h> #define __KVM_HAVE_GUEST_DEBUG +#define __KVM_HAVE_IRQ_LINE #define KVM_REG_SIZE(id) \ (1U << (((id) & KVM_REG_SIZE_MASK) >> KVM_REG_SIZE_SHIFT))@@ -85,4 +86,24 @@ struct kvm_reg_list { #define KVM_REG_ARM_CORE (0x0010 << KVM_REG_ARM_COPROC_SHIFT) #define KVM_REG_ARM_CORE_REG(name) (offsetof(struct kvm_regs, name) / 4) +/* KVM_IRQ_LINE irq field index values */ +#define KVM_ARM_IRQ_TYPE_SHIFT 24 +#define KVM_ARM_IRQ_TYPE_MASK 0xff +#define KVM_ARM_IRQ_VCPU_SHIFT 16 +#define KVM_ARM_IRQ_VCPU_MASK 0xff +#define KVM_ARM_IRQ_NUM_SHIFT 0 +#define KVM_ARM_IRQ_NUM_MASK 0xffff + +/* irq_type field */ +#define KVM_ARM_IRQ_TYPE_CPU 0 +#define KVM_ARM_IRQ_TYPE_SPI 1 +#define KVM_ARM_IRQ_TYPE_PPI 2 + +/* out-of-kernel GIC cpu interrupt injection irq_number field */ +#define KVM_ARM_IRQ_CPU_IRQ 0 +#define KVM_ARM_IRQ_CPU_FIQ 1 + +/* Highest supported SPI, from VGIC_NR_IRQS */ +#define KVM_ARM_IRQ_GIC_MAX 127
This define, and those referring to PPIs and SPIs sound highly GIC-specific. Is that really appropriate for kvm.h? Do you mandate a single GIC as the only interrupt controller?
quoted hunk ↗ jump to hunk
diff --git a/arch/arm/include/asm/kvm_arm.h b/arch/arm/include/asm/kvm_arm.h index 6e46541..0f641c1 100644 --- a/arch/arm/include/asm/kvm_arm.h +++ b/arch/arm/include/asm/kvm_arm.h@@ -74,6 +74,7 @@ #define HCR_GUEST_MASK (HCR_TSC | HCR_TSW | HCR_TWI | HCR_VM | HCR_BSU_IS | \ HCR_FB | HCR_TAC | HCR_AMO | HCR_IMO | HCR_FMO | \ HCR_SWIO | HCR_TIDCP) +#define HCR_VIRT_EXCP_MASK (HCR_VA | HCR_VI | HCR_VF) /* Hyp System Control Register (HSCTLR) bits */ #define HSCTLR_TE (1 << 30)diff --git a/arch/arm/kvm/arm.c b/arch/arm/kvm/arm.c index b97ebd0..8a87fc7 100644 --- a/arch/arm/kvm/arm.c +++ b/arch/arm/kvm/arm.c@@ -24,6 +24,7 @@ #include <linux/fs.h> #include <linux/mman.h> #include <linux/sched.h> +#include <linux/kvm.h> #include <trace/events/kvm.h> #define CREATE_TRACE_POINTS@@ -271,6 +272,7 @@ void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) { + vcpu->cpu = cpu; } void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)@@ -311,6 +313,74 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run) return -EINVAL; } +static int vcpu_interrupt_line(struct kvm_vcpu *vcpu, int number, bool level) +{ + int bit_index; + bool set; + unsigned long *ptr; + + if (number == KVM_ARM_IRQ_CPU_IRQ) + bit_index = ffs(HCR_VI) - 1; + else /* KVM_ARM_IRQ_CPU_FIQ */ + bit_index = ffs(HCR_VF) - 1;
__ffs Will