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KVM: Add infrastructure and macro to mark VM as bugged

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commit 0b8f11737cffc1a406d1134b58687abc29d76b52 upstream

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Isaku Yamahata <isaku.yamahata@intel.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <3a0998645c328bf0895f1290e61821b70f048549.1625186503.git.isaku.yamahata@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
[SG: Adjusted context for kernel version 4.19]
Signed-off-by: Stefan Ghinea <stefan.ghinea@windriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sean Christopherson 2022-08-10 23:26:22 +03:00 committed by Greg Kroah-Hartman
parent b99aba316b
commit 055afe675f
2 changed files with 32 additions and 6 deletions
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28
include/linux/kvm_host.h
View file

@ -128,6 +128,7 @@ static inline bool is_error_page(struct page *page)
#define KVM_REQ_MMU_RELOAD (1 | KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP)
#define KVM_REQ_PENDING_TIMER 2
#define KVM_REQ_UNHALT 3
#define KVM_REQ_VM_BUGGED (4 | KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP)
#define KVM_REQUEST_ARCH_BASE 8
#define KVM_ARCH_REQ_FLAGS(nr, flags) ({ \
@ -482,6 +483,7 @@ struct kvm {
struct srcu_struct srcu;
struct srcu_struct irq_srcu;
pid_t userspace_pid;
bool vm_bugged;
};
#define kvm_err(fmt, ...) \
@ -510,6 +512,31 @@ struct kvm {
#define vcpu_err(vcpu, fmt, ...) \
kvm_err("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
bool kvm_make_all_cpus_request(struct kvm *kvm, unsigned int req);
static inline void kvm_vm_bugged(struct kvm *kvm)
{
kvm->vm_bugged = true;
kvm_make_all_cpus_request(kvm, KVM_REQ_VM_BUGGED);
}
#define KVM_BUG(cond, kvm, fmt...) \
({ \
int __ret = (cond); \
\
if (WARN_ONCE(__ret && !(kvm)->vm_bugged, fmt)) \
kvm_vm_bugged(kvm); \
unlikely(__ret); \
})
#define KVM_BUG_ON(cond, kvm) \
({ \
int __ret = (cond); \
\
if (WARN_ON_ONCE(__ret && !(kvm)->vm_bugged)) \
kvm_vm_bugged(kvm); \
unlikely(__ret); \
})
static inline struct kvm_io_bus *kvm_get_bus(struct kvm *kvm, enum kvm_bus idx)
{
return srcu_dereference_check(kvm->buses[idx], &kvm->srcu,
@ -770,7 +797,6 @@ void kvm_reload_remote_mmus(struct kvm *kvm);
bool kvm_make_vcpus_request_mask(struct kvm *kvm, unsigned int req,
unsigned long *vcpu_bitmap, cpumask_var_t tmp);
bool kvm_make_all_cpus_request(struct kvm *kvm, unsigned int req);
long kvm_arch_dev_ioctl(struct file *filp,
unsigned int ioctl, unsigned long arg);

10
virt/kvm/kvm_main.c
View file

@ -2820,7 +2820,7 @@ static long kvm_vcpu_ioctl(struct file *filp,
struct kvm_fpu *fpu = NULL;
struct kvm_sregs *kvm_sregs = NULL;
if (vcpu->kvm->mm != current->mm)
if (vcpu->kvm->mm != current->mm || vcpu->kvm->vm_bugged)
return -EIO;
if (unlikely(_IOC_TYPE(ioctl) != KVMIO))
@ -3026,7 +3026,7 @@ static long kvm_vcpu_compat_ioctl(struct file *filp,
void __user *argp = compat_ptr(arg);
int r;
if (vcpu->kvm->mm != current->mm)
if (vcpu->kvm->mm != current->mm || vcpu->kvm->vm_bugged)
return -EIO;
switch (ioctl) {
@ -3081,7 +3081,7 @@ static long kvm_device_ioctl(struct file *filp, unsigned int ioctl,
{
struct kvm_device *dev = filp->private_data;
if (dev->kvm->mm != current->mm)
if (dev->kvm->mm != current->mm || dev->kvm->vm_bugged)
return -EIO;
switch (ioctl) {
@ -3244,7 +3244,7 @@ static long kvm_vm_ioctl(struct file *filp,
void __user *argp = (void __user *)arg;
int r;
if (kvm->mm != current->mm)
if (kvm->mm != current->mm || kvm->vm_bugged)
return -EIO;
switch (ioctl) {
case KVM_CREATE_VCPU:
@ -3422,7 +3422,7 @@ static long kvm_vm_compat_ioctl(struct file *filp,
struct kvm *kvm = filp->private_data;
int r;
if (kvm->mm != current->mm)
if (kvm->mm != current->mm || kvm->vm_bugged)
return -EIO;
switch (ioctl) {
case KVM_GET_DIRTY_LOG: {