From: Paolo Bonzini pbonzini@redhat.com
mainline inclusion from mainline-5.0 commit e5d83c74a5800c2a1fa3ba982c1c4b2b39ae6db2 category: bugfix bugzilla: NA CVE: NA
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The first such capability to be handled in virt/kvm/ will be manual dirty page reprotection.
Signed-off-by: Paolo Bonzini pbonzini@redhat.com Signed-off-by: Xiangyou Xie xiexiangyou@redhat.com Reviewed-by: Ying Fang fangying1@huawei.com Reviewed-by: Zenghui Yu yuzenghui@huawei.com Signed-off-by: Yang Yingliang yangyingliang@huawei.com --- Documentation/virtual/kvm/api.txt | 13 +++++++++---- arch/powerpc/kvm/powerpc.c | 14 ++------------ arch/s390/kvm/kvm-s390.c | 11 +---------- arch/x86/kvm/x86.c | 14 ++------------ include/linux/kvm_host.h | 2 ++ virt/kvm/kvm_main.c | 25 +++++++++++++++++++++++++ 6 files changed, 41 insertions(+), 38 deletions(-)
diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt index 1ed80bbf46a9..4378fbbcc30f 100644 --- a/Documentation/virtual/kvm/api.txt +++ b/Documentation/virtual/kvm/api.txt @@ -1130,10 +1130,15 @@ documentation when it pops into existence).
4.37 KVM_ENABLE_CAP
-Capability: KVM_CAP_ENABLE_CAP, KVM_CAP_ENABLE_CAP_VM -Architectures: x86 (only KVM_CAP_ENABLE_CAP_VM), - mips (only KVM_CAP_ENABLE_CAP), ppc, s390 -Type: vcpu ioctl, vm ioctl (with KVM_CAP_ENABLE_CAP_VM) +Capability: KVM_CAP_ENABLE_CAP +Architectures: mips, ppc, s390 +Type: vcpu ioctl +Parameters: struct kvm_enable_cap (in) +Returns: 0 on success; -1 on error + +Capability: KVM_CAP_ENABLE_CAP_VM +Architectures: all +Type: vcpu ioctl Parameters: struct kvm_enable_cap (in) Returns: 0 on success; -1 on error
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c index 51cd66dc1bb0..ee89f6fbea86 100644 --- a/arch/powerpc/kvm/powerpc.c +++ b/arch/powerpc/kvm/powerpc.c @@ -523,7 +523,6 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) case KVM_CAP_PPC_UNSET_IRQ: case KVM_CAP_PPC_IRQ_LEVEL: case KVM_CAP_ENABLE_CAP: - case KVM_CAP_ENABLE_CAP_VM: case KVM_CAP_ONE_REG: case KVM_CAP_IOEVENTFD: case KVM_CAP_DEVICE_CTRL: @@ -2090,8 +2089,8 @@ int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event, }
-static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, - struct kvm_enable_cap *cap) +int kvm_vm_ioctl_enable_cap(struct kvm *kvm, + struct kvm_enable_cap *cap) { int r;
@@ -2271,15 +2270,6 @@ long kvm_arch_vm_ioctl(struct file *filp,
break; } - case KVM_ENABLE_CAP: - { - struct kvm_enable_cap cap; - r = -EFAULT; - if (copy_from_user(&cap, argp, sizeof(cap))) - goto out; - r = kvm_vm_ioctl_enable_cap(kvm, &cap); - break; - } #ifdef CONFIG_SPAPR_TCE_IOMMU case KVM_CREATE_SPAPR_TCE_64: { struct kvm_create_spapr_tce_64 create_tce_64; diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index 18662c1a9361..c18ed934677f 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -474,7 +474,6 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) case KVM_CAP_S390_CSS_SUPPORT: case KVM_CAP_IOEVENTFD: case KVM_CAP_DEVICE_CTRL: - case KVM_CAP_ENABLE_CAP_VM: case KVM_CAP_S390_IRQCHIP: case KVM_CAP_VM_ATTRIBUTES: case KVM_CAP_MP_STATE: @@ -618,7 +617,7 @@ static void icpt_operexc_on_all_vcpus(struct kvm *kvm) } }
-static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap) +int kvm_vm_ioctl_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap) { int r;
@@ -1915,14 +1914,6 @@ long kvm_arch_vm_ioctl(struct file *filp, r = kvm_s390_inject_vm(kvm, &s390int); break; } - case KVM_ENABLE_CAP: { - struct kvm_enable_cap cap; - r = -EFAULT; - if (copy_from_user(&cap, argp, sizeof(cap))) - break; - r = kvm_vm_ioctl_enable_cap(kvm, &cap); - break; - } case KVM_CREATE_IRQCHIP: { struct kvm_irq_routing_entry routing;
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index fbfe5a24188e..e53040611337 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -3062,7 +3062,6 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) case KVM_CAP_HYPERV_TIME: case KVM_CAP_IOAPIC_POLARITY_IGNORED: case KVM_CAP_TSC_DEADLINE_TIMER: - case KVM_CAP_ENABLE_CAP_VM: case KVM_CAP_DISABLE_QUIRKS: case KVM_CAP_SET_BOOT_CPU_ID: case KVM_CAP_SPLIT_IRQCHIP: @@ -4455,8 +4454,8 @@ int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event, return 0; }
-static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, - struct kvm_enable_cap *cap) +int kvm_vm_ioctl_enable_cap(struct kvm *kvm, + struct kvm_enable_cap *cap) { int r;
@@ -4791,15 +4790,6 @@ long kvm_arch_vm_ioctl(struct file *filp, r = 0; break; } - case KVM_ENABLE_CAP: { - struct kvm_enable_cap cap; - - r = -EFAULT; - if (copy_from_user(&cap, argp, sizeof(cap))) - goto out; - r = kvm_vm_ioctl_enable_cap(kvm, &cap); - break; - } case KVM_MEMORY_ENCRYPT_OP: { r = -ENOTTY; if (kvm_x86_ops->mem_enc_op) diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index cec751bf6084..6d73855e0974 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -824,6 +824,8 @@ int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level, bool line_status); +int kvm_vm_ioctl_enable_cap(struct kvm *kvm, + struct kvm_enable_cap *cap); long kvm_arch_vm_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg);
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 16c55b62f33d..5b4f4231292b 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -3185,6 +3185,7 @@ static long kvm_vm_ioctl_check_extension_generic(struct kvm *kvm, long arg) #endif case KVM_CAP_IOEVENTFD_ANY_LENGTH: case KVM_CAP_CHECK_EXTENSION_VM: + case KVM_CAP_ENABLE_CAP_VM: return 1; #ifdef CONFIG_KVM_MMIO case KVM_CAP_COALESCED_MMIO: @@ -3204,6 +3205,21 @@ static long kvm_vm_ioctl_check_extension_generic(struct kvm *kvm, long arg) return kvm_vm_ioctl_check_extension(kvm, arg); }
+int __attribute__((weak)) kvm_vm_ioctl_enable_cap(struct kvm *kvm, + struct kvm_enable_cap *cap) +{ + return -EINVAL; +} + +static int kvm_vm_ioctl_enable_cap_generic(struct kvm *kvm, + struct kvm_enable_cap *cap) +{ + switch (cap->cap) { + default: + return kvm_vm_ioctl_enable_cap(kvm, cap); + } +} + static long kvm_vm_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg) { @@ -3217,6 +3233,15 @@ static long kvm_vm_ioctl(struct file *filp, case KVM_CREATE_VCPU: r = kvm_vm_ioctl_create_vcpu(kvm, arg); break; + case KVM_ENABLE_CAP: { + struct kvm_enable_cap cap; + + r = -EFAULT; + if (copy_from_user(&cap, argp, sizeof(cap))) + goto out; + r = kvm_vm_ioctl_enable_cap_generic(kvm, &cap); + break; + } case KVM_SET_USER_MEMORY_REGION: { struct kvm_userspace_memory_region kvm_userspace_mem;