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: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Isaku Yamahata <isaku.yamahata@intel.com>
Message-Id: <1d8cbbc8065d831343e70b5dcaea92268145eef1.1625186503.git.isaku.yamahata@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 5342592..b7bf9d6 100644 (file)
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -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,