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authorAlexey Kardashevskiy <aik@ozlabs.ru>2017-12-15 16:23:26 +1100
committerPaolo Bonzini <pbonzini@redhat.com>2018-02-05 13:54:38 +0100
commitfe29141bee3e8603a39838897698d8349c3daef0 (patch)
tree8e7b4e8142d03a0a5d788a340966b4e05a3df671 /accel
parentbf853881690db8bbd1de39e4be580310a9cb0ebc (diff)
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kvm: Add kvm_set_user_memory tracepoint
This adds a tracepoint to trace the KVM_SET_USER_MEMORY_REGION ioctl parameters which is quite useful for debugging VFIO memory regions being actually registered with KVM. Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-Id: <20171215052326.21386-1-aik@ozlabs.ru> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'accel')
-rw-r--r--accel/kvm/kvm-all.c6
-rw-r--r--accel/kvm/trace-events1
2 files changed, 6 insertions, 1 deletions
diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
index f290f48..b91fcb7 100644
--- a/accel/kvm/kvm-all.c
+++ b/accel/kvm/kvm-all.c
@@ -235,6 +235,7 @@ static int kvm_set_user_memory_region(KVMMemoryListener *kml, KVMSlot *slot)
{
KVMState *s = kvm_state;
struct kvm_userspace_memory_region mem;
+ int ret;
mem.slot = slot->slot | (kml->as_id << 16);
mem.guest_phys_addr = slot->start_addr;
@@ -248,7 +249,10 @@ static int kvm_set_user_memory_region(KVMMemoryListener *kml, KVMSlot *slot)
kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem);
}
mem.memory_size = slot->memory_size;
- return kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem);
+ ret = kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem);
+ trace_kvm_set_user_memory(mem.slot, mem.flags, mem.guest_phys_addr,
+ mem.memory_size, mem.userspace_addr, ret);
+ return ret;
}
int kvm_destroy_vcpu(CPUState *cpu)
diff --git a/accel/kvm/trace-events b/accel/kvm/trace-events
index f89ba55..58e98ef 100644
--- a/accel/kvm/trace-events
+++ b/accel/kvm/trace-events
@@ -12,4 +12,5 @@ kvm_irqchip_commit_routes(void) ""
kvm_irqchip_add_msi_route(char *name, int vector, int virq) "dev %s vector %d virq %d"
kvm_irqchip_update_msi_route(int virq) "Updating MSI route virq=%d"
kvm_irqchip_release_virq(int virq) "virq %d"
+kvm_set_user_memory(uint32_t slot, uint32_t flags, uint64_t guest_phys_addr, uint64_t memory_size, uint64_t userspace_addr, int ret) "Slot#%d flags=0x%x gpa=0x%"PRIx64 " size=0x%"PRIx64 " ua=0x%"PRIx64 " ret=%d"