diff options
| -rw-r--r-- | drivers/kvm/kvm.h | 9 | ||||
| -rw-r--r-- | drivers/kvm/kvm_main.c | 200 | ||||
| -rw-r--r-- | drivers/kvm/x86.c | 219 |
3 files changed, 234 insertions, 194 deletions
diff --git a/drivers/kvm/kvm.h b/drivers/kvm/kvm.h index d56962d49aa6..1edf8a5e365e 100644 --- a/drivers/kvm/kvm.h +++ b/drivers/kvm/kvm.h @@ -537,6 +537,10 @@ extern struct kvm_x86_ops *kvm_x86_ops; int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id); void kvm_vcpu_uninit(struct kvm_vcpu *vcpu); +void vcpu_load(struct kvm_vcpu *vcpu); +void vcpu_put(struct kvm_vcpu *vcpu); + + int kvm_init_x86(struct kvm_x86_ops *ops, unsigned int vcpu_size, struct module *module); void kvm_exit_x86(void); @@ -655,6 +659,11 @@ int kvm_fix_hypercall(struct kvm_vcpu *vcpu); long kvm_arch_dev_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg); +long kvm_arch_vcpu_ioctl(struct file *filp, + unsigned int ioctl, unsigned long arg); +void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu); +void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu); + __init void kvm_arch_init(void); static inline void kvm_guest_enter(void) diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c index ec696887b222..5fd2864b7811 100644 --- a/drivers/kvm/kvm_main.c +++ b/drivers/kvm/kvm_main.c @@ -90,8 +90,6 @@ static struct kvm_stats_debugfs_item { static struct dentry *debugfs_dir; -#define MAX_IO_MSRS 256 - #define CR0_RESERVED_BITS \ (~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \ | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \ @@ -179,21 +177,21 @@ EXPORT_SYMBOL_GPL(kvm_put_guest_fpu); /* * Switches to specified vcpu, until a matching vcpu_put() */ -static void vcpu_load(struct kvm_vcpu *vcpu) +void vcpu_load(struct kvm_vcpu *vcpu) { int cpu; mutex_lock(&vcpu->mutex); cpu = get_cpu(); preempt_notifier_register(&vcpu->preempt_notifier); - kvm_x86_ops->vcpu_load(vcpu, cpu); + kvm_arch_vcpu_load(vcpu, cpu); put_cpu(); } -static void vcpu_put(struct kvm_vcpu *vcpu) +void vcpu_put(struct kvm_vcpu *vcpu) { preempt_disable(); - kvm_x86_ops->vcpu_put(vcpu); + kvm_arch_vcpu_put(vcpu); preempt_notifier_unregister(&vcpu->preempt_notifier); preempt_enable(); mutex_unlock(&vcpu->mutex); @@ -2509,86 +2507,6 @@ void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l) EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits); /* - * Adapt set_msr() to msr_io()'s calling convention - */ -static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data) -{ - return kvm_set_msr(vcpu, index, *data); -} - -/* - * Read or write a bunch of msrs. All parameters are kernel addresses. - * - * @return number of msrs set successfully. - */ -static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs, - struct kvm_msr_entry *entries, - int (*do_msr)(struct kvm_vcpu *vcpu, - unsigned index, u64 *data)) -{ - int i; - - vcpu_load(vcpu); - - for (i = 0; i < msrs->nmsrs; ++i) - if (do_msr(vcpu, entries[i].index, &entries[i].data)) - break; - - vcpu_put(vcpu); - - return i; -} - -/* - * Read or write a bunch of msrs. Parameters are user addresses. - * - * @return number of msrs set successfully. - */ -static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs, - int (*do_msr)(struct kvm_vcpu *vcpu, - unsigned index, u64 *data), - int writeback) -{ - struct kvm_msrs msrs; - struct kvm_msr_entry *entries; - int r, n; - unsigned size; - - r = -EFAULT; - if (copy_from_user(&msrs, user_msrs, sizeof msrs)) - goto out; - - r = -E2BIG; - if (msrs.nmsrs >= MAX_IO_MSRS) - goto out; - - r = -ENOMEM; - size = sizeof(struct kvm_msr_entry) * msrs.nmsrs; - entries = vmalloc(size); - if (!entries) - goto out; - - r = -EFAULT; - if (copy_from_user(entries, user_msrs->entries, size)) - goto out_free; - - r = n = __msr_io(vcpu, &msrs, entries, do_msr); - if (r < 0) - goto out_free; - - r = -EFAULT; - if (writeback && copy_to_user(user_msrs->entries, entries, size)) - goto out_free; - - r = n; - -out_free: - vfree(entries); -out: - return r; -} - -/* * Translate a guest virtual address to a guest physical address. */ static int kvm_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, @@ -2761,48 +2679,6 @@ free_vcpu: return r; } -static void cpuid_fix_nx_cap(struct kvm_vcpu *vcpu) -{ - u64 efer; - int i; - struct kvm_cpuid_entry *e, *entry; - - rdmsrl(MSR_EFER, efer); - entry = NULL; - for (i = 0; i < vcpu->cpuid_nent; ++i) { - e = &vcpu->cpuid_entries[i]; - if (e->function == 0x80000001) { - entry = e; - break; - } - } - if (entry && (entry->edx & (1 << 20)) && !(efer & EFER_NX)) { - entry->edx &= ~(1 << 20); - printk(KERN_INFO "kvm: guest NX capability removed\n"); - } -} - -static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu, - struct kvm_cpuid *cpuid, - struct kvm_cpuid_entry __user *entries) -{ - int r; - - r = -E2BIG; - if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) - goto out; - r = -EFAULT; - if (copy_from_user(&vcpu->cpuid_entries, entries, - cpuid->nent * sizeof(struct kvm_cpuid_entry))) - goto out; - vcpu->cpuid_nent = cpuid->nent; - cpuid_fix_nx_cap(vcpu); - return 0; - -out: - return r; -} - static int kvm_vcpu_ioctl_set_sigmask(struct kvm_vcpu *vcpu, sigset_t *sigset) { if (sigset) { @@ -2875,33 +2751,12 @@ static int kvm_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) return 0; } -static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu, - struct kvm_lapic_state *s) -{ - vcpu_load(vcpu); - memcpy(s->regs, vcpu->apic->regs, sizeof *s); - vcpu_put(vcpu); - - return 0; -} - -static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu *vcpu, - struct kvm_lapic_state *s) -{ - vcpu_load(vcpu); - memcpy(vcpu->apic->regs, s->regs, sizeof *s); - kvm_apic_post_state_restore(vcpu); - vcpu_put(vcpu); - - return 0; -} - static long kvm_vcpu_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg) { struct kvm_vcpu *vcpu = filp->private_data; void __user *argp = (void __user *)arg; - int r = -EINVAL; + int r; switch (ioctl) { case KVM_RUN: @@ -2999,24 +2854,6 @@ static long kvm_vcpu_ioctl(struct file *filp, r = 0; break; } - case KVM_GET_MSRS: - r = msr_io(vcpu, argp, kvm_get_msr, 1); - break; - case KVM_SET_MSRS: - r = msr_io(vcpu, argp, do_set_msr, 0); - break; - case KVM_SET_CPUID: { - struct kvm_cpuid __user *cpuid_arg = argp; - struct kvm_cpuid cpuid; - - r = -EFAULT; - if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) - goto out; - r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries); - if (r) - goto out; - break; - } case KVM_SET_SIGNAL_MASK: { struct kvm_signal_mask __user *sigmask_arg = argp; struct kvm_signal_mask kvm_sigmask; @@ -3065,33 +2902,8 @@ static long kvm_vcpu_ioctl(struct file *filp, r = 0; break; } - case KVM_GET_LAPIC: { - struct kvm_lapic_state lapic; - - memset(&lapic, 0, sizeof lapic); - r = kvm_vcpu_ioctl_get_lapic(vcpu, &lapic); - if (r) - goto out; - r = -EFAULT; - if (copy_to_user(argp, &lapic, sizeof lapic)) - goto out; - r = 0; - break; - } - case KVM_SET_LAPIC: { - struct kvm_lapic_state lapic; - - r = -EFAULT; - if (copy_from_user(&lapic, argp, sizeof lapic)) - goto out; - r = kvm_vcpu_ioctl_set_lapic(vcpu, &lapic);; - if (r) - goto out; - r = 0; - break; - } default: - ; + r = kvm_arch_vcpu_ioctl(filp, ioctl, arg); } out: return r; diff --git a/drivers/kvm/x86.c b/drivers/kvm/x86.c index 437902cf178d..1fe209dd4caf 100644 --- a/drivers/kvm/x86.c +++ b/drivers/kvm/x86.c @@ -14,10 +14,18 @@ * */ +#include "kvm.h" #include "x86.h" +#include "irq.h" + +#include <linux/kvm.h> +#include <linux/fs.h> +#include <linux/vmalloc.h> #include <asm/uaccess.h> +#define MAX_IO_MSRS 256 + /* * List of msr numbers which we expose to userspace through KVM_GET_MSRS * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST. @@ -40,6 +48,86 @@ static u32 emulated_msrs[] = { MSR_IA32_MISC_ENABLE, }; +/* + * Adapt set_msr() to msr_io()'s calling convention + */ +static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data) +{ + return kvm_set_msr(vcpu, index, *data); +} + +/* + * Read or write a bunch of msrs. All parameters are kernel addresses. + * + * @return number of msrs set successfully. + */ +static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs, + struct kvm_msr_entry *entries, + int (*do_msr)(struct kvm_vcpu *vcpu, + unsigned index, u64 *data)) +{ + int i; + + vcpu_load(vcpu); + + for (i = 0; i < msrs->nmsrs; ++i) + if (do_msr(vcpu, entries[i].index, &entries[i].data)) + break; + + vcpu_put(vcpu); + + return i; +} + +/* + * Read or write a bunch of msrs. Parameters are user addresses. + * + * @return number of msrs set successfully. + */ +static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs, + int (*do_msr)(struct kvm_vcpu *vcpu, + unsigned index, u64 *data), + int writeback) +{ + struct kvm_msrs msrs; + struct kvm_msr_entry *entries; + int r, n; + unsigned size; + + r = -EFAULT; + if (copy_from_user(&msrs, user_msrs, sizeof msrs)) + goto out; + + r = -E2BIG; + if (msrs.nmsrs >= MAX_IO_MSRS) + goto out; + + r = -ENOMEM; + size = sizeof(struct kvm_msr_entry) * msrs.nmsrs; + entries = vmalloc(size); + if (!entries) + goto out; + + r = -EFAULT; + if (copy_from_user(entries, user_msrs->entries, size)) + goto out_free; + + r = n = __msr_io(vcpu, &msrs, entries, do_msr); + if (r < 0) + goto out_free; + + r = -EFAULT; + if (writeback && copy_to_user(user_msrs->entries, entries, size)) + goto out_free; + + r = n; + +out_free: + vfree(entries); +out: + return r; +} + long kvm_arch_dev_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg) { @@ -81,6 +169,137 @@ out: return r; } +void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) +{ + kvm_x86_ops->vcpu_load(vcpu, cpu); +} + +void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) +{ + kvm_x86_ops->vcpu_put(vcpu); +} + +static void cpuid_fix_nx_cap(struct kvm_vcpu *vcpu) +{ + u64 efer; + int i; + struct kvm_cpuid_entry *e, *entry; + + rdmsrl(MSR_EFER, efer); + entry = NULL; + for (i = 0; i < vcpu->cpuid_nent; ++i) { + e = &vcpu->cpuid_entries[i]; + if (e->function == 0x80000001) { + entry = e; + break; + } + } + if (entry && (entry->edx & (1 << 20)) && !(efer & EFER_NX)) { + entry->edx &= ~(1 << 20); + printk(KERN_INFO "kvm: guest NX capability removed\n"); + } +} + +static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu, + struct kvm_cpuid *cpuid, + struct kvm_cpuid_entry __user *entries) +{ + int r; + + r = -E2BIG; + if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) + goto out; + r = -EFAULT; + if (copy_from_user(&vcpu->cpuid_entries, entries, + cpuid->nent * sizeof(struct kvm_cpuid_entry))) + goto out; + vcpu->cpuid_nent = cpuid->nent; + cpuid_fix_nx_cap(vcpu); + return 0; + +out: + return r; +} + +static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu, + struct kvm_lapic_state *s) +{ + vcpu_load(vcpu); + memcpy(s->regs, vcpu->apic->regs, sizeof *s); + vcpu_put(vcpu); + + return 0; +} + +static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu *vcpu, + struct kvm_lapic_state *s) +{ + vcpu_load(vcpu); + memcpy(vcpu->apic->regs, s->regs, sizeof *s); + kvm_apic_post_state_restore(vcpu); + vcpu_put(vcpu); + + return 0; +} + +long kvm_arch_vcpu_ioctl(struct file *filp, + unsigned int ioctl, unsigned long arg) +{ + struct kvm_vcpu *vcpu = filp->private_data; + void __user *argp = (void __user *)arg; + int r; + + switch (ioctl) { + case KVM_GET_LAPIC: { + struct kvm_lapic_state lapic; + + memset(&lapic, 0, sizeof lapic); + r = kvm_vcpu_ioctl_get_lapic(vcpu, &lapic); + if (r) + goto out; + r = -EFAULT; + if (copy_to_user(argp, &lapic, sizeof lapic)) + goto out; + r = 0; + break; + } + case KVM_SET_LAPIC: { + struct kvm_lapic_state lapic; + + r = -EFAULT; + if (copy_from_user(&lapic, argp, sizeof lapic)) + goto out; + r = kvm_vcpu_ioctl_set_lapic(vcpu, &lapic);; + if (r) + goto out; + r = 0; + break; + } + case KVM_SET_CPUID: { + struct kvm_cpuid __user *cpuid_arg = argp; + struct kvm_cpuid cpuid; + + r = -EFAULT; + if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) + goto out; + r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries); + if (r) + goto out; + break; + } + case KVM_GET_MSRS: + r = msr_io(vcpu, argp, kvm_get_msr, 1); + break; + case KVM_SET_MSRS: + r = msr_io(vcpu, argp, do_set_msr, 0); + break; + default: + r = -EINVAL; + } +out: + return r; +} + static __init void kvm_init_msr_list(void) { u32 dummy[2]; |