Commit 7ee3e8c3 authored by Sean Christopherson's avatar Sean Christopherson Committed by Paolo Bonzini
Browse files

KVM: Export kvm_make_all_cpus_request() for use in marking VMs as bugged 



Export kvm_make_all_cpus_request() and hoist the request helper
declarations of request up to the KVM_REQ_* definitions in preparation
for adding a "VM bugged" framework.  The framework will add KVM_BUG()
and KVM_BUG_ON() as alternatives to full BUG()/BUG_ON() for cases where
KVM has definitely hit a bug (in itself or in silicon) and the VM is all
but guaranteed to be hosed.  Marking a VM bugged will trigger a request
to all vCPUs to allow arch code to forcefully evict each vCPU from its
run loop.

Signed-off-by: default avatarSean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: default avatarIsaku Yamahata <isaku.yamahata@intel.com>
Message-Id: <1d8cbbc8065d831343e70b5dcaea92268145eef1.1625186503.git.isaku.yamahata@intel.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 0b8f1173

include/linux/kvm_host.h

+9 −9
Original line number Diff line number Diff line
@@ -159,6 +159,15 @@ static inline bool is_error_page(struct page *page) 
})

#define KVM_ARCH_REQ(nr)           KVM_ARCH_REQ_FLAGS(nr, 0)



bool kvm_make_vcpus_request_mask(struct kvm *kvm, unsigned int req,

				 struct kvm_vcpu *except,

				 unsigned long *vcpu_bitmap, cpumask_var_t tmp);

bool kvm_make_all_cpus_request(struct kvm *kvm, unsigned int req);

bool kvm_make_all_cpus_request_except(struct kvm *kvm, unsigned int req,

				      struct kvm_vcpu *except);

bool kvm_make_cpus_request_mask(struct kvm *kvm, unsigned int req,

				unsigned long *vcpu_bitmap);



#define KVM_USERSPACE_IRQ_SOURCE_ID		0

#define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID	1
@@ -631,7 +640,6 @@ 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;
@@ -970,14 +978,6 @@ void kvm_mmu_free_memory_cache(struct kvm_mmu_memory_cache *mc); 
void *kvm_mmu_memory_cache_alloc(struct kvm_mmu_memory_cache *mc);

#endif



bool kvm_make_vcpus_request_mask(struct kvm *kvm, unsigned int req,

				 struct kvm_vcpu *except,

				 unsigned long *vcpu_bitmap, cpumask_var_t tmp);

bool kvm_make_all_cpus_request_except(struct kvm *kvm, unsigned int req,

				      struct kvm_vcpu *except);

bool kvm_make_cpus_request_mask(struct kvm *kvm, unsigned int req,

				unsigned long *vcpu_bitmap);



long kvm_arch_dev_ioctl(struct file *filp,

			unsigned int ioctl, unsigned long arg);

long kvm_arch_vcpu_ioctl(struct file *filp,