diff options
| -rw-r--r-- | arch/arm/include/asm/kvm_host.h | 3 | ||||
| -rw-r--r-- | arch/arm/include/uapi/asm/kvm.h | 20 | ||||
| -rw-r--r-- | arch/arm/kvm/guest.c | 92 | ||||
| -rw-r--r-- | arch/arm64/include/uapi/asm/kvm.h | 18 | ||||
| -rw-r--r-- | virt/kvm/arm/arch_timer.c | 34 |
5 files changed, 166 insertions, 1 deletions
diff --git a/arch/arm/include/asm/kvm_host.h b/arch/arm/include/asm/kvm_host.h index 8a6f6db14ee4..098f7dd6d564 100644 --- a/arch/arm/include/asm/kvm_host.h +++ b/arch/arm/include/asm/kvm_host.h @@ -225,4 +225,7 @@ static inline int kvm_arch_dev_ioctl_check_extension(long ext) int kvm_perf_init(void); int kvm_perf_teardown(void); +u64 kvm_arm_timer_get_reg(struct kvm_vcpu *, u64 regid); +int kvm_arm_timer_set_reg(struct kvm_vcpu *, u64 regid, u64 value); + #endif /* __ARM_KVM_HOST_H__ */ diff --git a/arch/arm/include/uapi/asm/kvm.h b/arch/arm/include/uapi/asm/kvm.h index c498b60c0505..835b8678de03 100644 --- a/arch/arm/include/uapi/asm/kvm.h +++ b/arch/arm/include/uapi/asm/kvm.h @@ -119,6 +119,26 @@ struct kvm_arch_memory_slot { #define KVM_REG_ARM_32_CRN_MASK 0x0000000000007800 #define KVM_REG_ARM_32_CRN_SHIFT 11 +#define ARM_CP15_REG_SHIFT_MASK(x,n) \ + (((x) << KVM_REG_ARM_ ## n ## _SHIFT) & KVM_REG_ARM_ ## n ## _MASK) + +#define __ARM_CP15_REG(op1,crn,crm,op2) \ + (KVM_REG_ARM | (15 << KVM_REG_ARM_COPROC_SHIFT) | \ + ARM_CP15_REG_SHIFT_MASK(op1, OPC1) | \ + ARM_CP15_REG_SHIFT_MASK(crn, 32_CRN) | \ + ARM_CP15_REG_SHIFT_MASK(crm, CRM) | \ + ARM_CP15_REG_SHIFT_MASK(op2, 32_OPC2)) + +#define ARM_CP15_REG32(...) (__ARM_CP15_REG(__VA_ARGS__) | KVM_REG_SIZE_U32) + +#define __ARM_CP15_REG64(op1,crm) \ + (__ARM_CP15_REG(op1, 0, crm, 0) | KVM_REG_SIZE_U64) +#define ARM_CP15_REG64(...) __ARM_CP15_REG64(__VA_ARGS__) + +#define KVM_REG_ARM_TIMER_CTL ARM_CP15_REG32(0, 14, 3, 1) +#define KVM_REG_ARM_TIMER_CNT ARM_CP15_REG64(1, 14) +#define KVM_REG_ARM_TIMER_CVAL ARM_CP15_REG64(3, 14) + /* Normal registers are mapped as coprocessor 16. */ #define KVM_REG_ARM_CORE (0x0010 << KVM_REG_ARM_COPROC_SHIFT) #define KVM_REG_ARM_CORE_REG(name) (offsetof(struct kvm_regs, name) / 4) diff --git a/arch/arm/kvm/guest.c b/arch/arm/kvm/guest.c index 20f8d97904af..2786eae10c0d 100644 --- a/arch/arm/kvm/guest.c +++ b/arch/arm/kvm/guest.c @@ -109,6 +109,83 @@ int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) return -EINVAL; } +#ifndef CONFIG_KVM_ARM_TIMER + +#define NUM_TIMER_REGS 0 + +static int copy_timer_indices(struct kvm_vcpu *vcpu, u64 __user *uindices) +{ + return 0; +} + +static bool is_timer_reg(u64 index) +{ + return false; +} + +int kvm_arm_timer_set_reg(struct kvm_vcpu *vcpu, u64 regid, u64 value) +{ + return 0; +} + +u64 kvm_arm_timer_get_reg(struct kvm_vcpu *vcpu, u64 regid) +{ + return 0; +} + +#else + +#define NUM_TIMER_REGS 3 + +static bool is_timer_reg(u64 index) +{ + switch (index) { + case KVM_REG_ARM_TIMER_CTL: + case KVM_REG_ARM_TIMER_CNT: + case KVM_REG_ARM_TIMER_CVAL: + return true; + } + return false; +} + +static int copy_timer_indices(struct kvm_vcpu *vcpu, u64 __user *uindices) +{ + if (put_user(KVM_REG_ARM_TIMER_CTL, uindices)) + return -EFAULT; + uindices++; + if (put_user(KVM_REG_ARM_TIMER_CNT, uindices)) + return -EFAULT; + uindices++; + if (put_user(KVM_REG_ARM_TIMER_CVAL, uindices)) + return -EFAULT; + + return 0; +} + +#endif + +static int set_timer_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg) +{ + void __user *uaddr = (void __user *)(long)reg->addr; + u64 val; + int ret; + + ret = copy_from_user(&val, uaddr, KVM_REG_SIZE(reg->id)); + if (ret != 0) + return ret; + + return kvm_arm_timer_set_reg(vcpu, reg->id, val); +} + +static int get_timer_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg) +{ + void __user *uaddr = (void __user *)(long)reg->addr; + u64 val; + + val = kvm_arm_timer_get_reg(vcpu, reg->id); + return copy_to_user(uaddr, &val, KVM_REG_SIZE(reg->id)); +} + static unsigned long num_core_regs(void) { return sizeof(struct kvm_regs) / sizeof(u32); @@ -121,7 +198,8 @@ static unsigned long num_core_regs(void) */ unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu) { - return num_core_regs() + kvm_arm_num_coproc_regs(vcpu); + return num_core_regs() + kvm_arm_num_coproc_regs(vcpu) + + NUM_TIMER_REGS; } /** @@ -133,6 +211,7 @@ int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *uindices) { unsigned int i; const u64 core_reg = KVM_REG_ARM | KVM_REG_SIZE_U32 | KVM_REG_ARM_CORE; + int ret; for (i = 0; i < sizeof(struct kvm_regs)/sizeof(u32); i++) { if (put_user(core_reg | i, uindices)) @@ -140,6 +219,11 @@ int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *uindices) uindices++; } + ret = copy_timer_indices(vcpu, uindices); + if (ret) + return ret; + uindices += NUM_TIMER_REGS; + return kvm_arm_copy_coproc_indices(vcpu, uindices); } @@ -153,6 +237,9 @@ int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg) if ((reg->id & KVM_REG_ARM_COPROC_MASK) == KVM_REG_ARM_CORE) return get_core_reg(vcpu, reg); + if (is_timer_reg(reg->id)) + return get_timer_reg(vcpu, reg); + return kvm_arm_coproc_get_reg(vcpu, reg); } @@ -166,6 +253,9 @@ int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg) if ((reg->id & KVM_REG_ARM_COPROC_MASK) == KVM_REG_ARM_CORE) return set_core_reg(vcpu, reg); + if (is_timer_reg(reg->id)) + return set_timer_reg(vcpu, reg); + return kvm_arm_coproc_set_reg(vcpu, reg); } diff --git a/arch/arm64/include/uapi/asm/kvm.h b/arch/arm64/include/uapi/asm/kvm.h index 5031f4263937..7c25ca8b02b3 100644 --- a/arch/arm64/include/uapi/asm/kvm.h +++ b/arch/arm64/include/uapi/asm/kvm.h @@ -129,6 +129,24 @@ struct kvm_arch_memory_slot { #define KVM_REG_ARM64_SYSREG_OP2_MASK 0x0000000000000007 #define KVM_REG_ARM64_SYSREG_OP2_SHIFT 0 +#define ARM64_SYS_REG_SHIFT_MASK(x,n) \ + (((x) << KVM_REG_ARM64_SYSREG_ ## n ## _SHIFT) & \ + KVM_REG_ARM64_SYSREG_ ## n ## _MASK) + +#define __ARM64_SYS_REG(op0,op1,crn,crm,op2) \ + (KVM_REG_ARM64 | KVM_REG_ARM64_SYSREG | \ + ARM64_SYS_REG_SHIFT_MASK(op0, OP0) | \ + ARM64_SYS_REG_SHIFT_MASK(op1, OP1) | \ + ARM64_SYS_REG_SHIFT_MASK(crn, CRN) | \ + ARM64_SYS_REG_SHIFT_MASK(crm, CRM) | \ + ARM64_SYS_REG_SHIFT_MASK(op2, OP2)) + +#define ARM64_SYS_REG(...) (__ARM64_SYS_REG(__VA_ARGS__) | KVM_REG_SIZE_U64) + +#define KVM_REG_ARM_TIMER_CTL ARM64_SYS_REG(3, 3, 14, 3, 1) +#define KVM_REG_ARM_TIMER_CNT ARM64_SYS_REG(3, 3, 14, 3, 2) +#define KVM_REG_ARM_TIMER_CVAL ARM64_SYS_REG(3, 3, 14, 0, 2) + /* KVM_IRQ_LINE irq field index values */ #define KVM_ARM_IRQ_TYPE_SHIFT 24 #define KVM_ARM_IRQ_TYPE_MASK 0xff diff --git a/virt/kvm/arm/arch_timer.c b/virt/kvm/arm/arch_timer.c index c2e1ef4604e8..5081e809821f 100644 --- a/virt/kvm/arm/arch_timer.c +++ b/virt/kvm/arm/arch_timer.c @@ -182,6 +182,40 @@ static void kvm_timer_init_interrupt(void *info) enable_percpu_irq(host_vtimer_irq, 0); } +int kvm_arm_timer_set_reg(struct kvm_vcpu *vcpu, u64 regid, u64 value) +{ + struct arch_timer_cpu *timer = &vcpu->arch.timer_cpu; + + switch (regid) { + case KVM_REG_ARM_TIMER_CTL: + timer->cntv_ctl = value; + break; + case KVM_REG_ARM_TIMER_CNT: + vcpu->kvm->arch.timer.cntvoff = kvm_phys_timer_read() - value; + break; + case KVM_REG_ARM_TIMER_CVAL: + timer->cntv_cval = value; + break; + default: + return -1; + } + return 0; +} + +u64 kvm_arm_timer_get_reg(struct kvm_vcpu *vcpu, u64 regid) +{ + struct arch_timer_cpu *timer = &vcpu->arch.timer_cpu; + + switch (regid) { + case KVM_REG_ARM_TIMER_CTL: + return timer->cntv_ctl; + case KVM_REG_ARM_TIMER_CNT: + return kvm_phys_timer_read() - vcpu->kvm->arch.timer.cntvoff; + case KVM_REG_ARM_TIMER_CVAL: + return timer->cntv_cval; + } + return (u64)-1; +} static int kvm_timer_cpu_notify(struct notifier_block *self, unsigned long action, void *cpu) |
