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KVM: Add helper to run KVM_CHECK_EXTENSION on vm fd 

We now can call KVM_CHECK_EXTENSION on the kvm fd or on the vm fd, whereas
the vm version is more accurate when it comes to PPC KVM.

Add a helper to make the vm version available that falls back to the non-vm
variant if the vm one is not available yet to stay compatible.

Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Alexander Graf 2014-07-14 19:15:15 +02:00
parent 4bc02e230d
commit 7d0a07fa92
2 changed files with 15 additions and 0 deletions
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2
include/sysemu/kvm.h
View File

@ -303,6 +303,8 @@ bool kvm_arch_stop_on_emulation_error(CPUState *cpu);
int kvm_check_extension(KVMState *s, unsigned int extension);
int kvm_vm_check_extension(KVMState *s, unsigned int extension);
#define kvm_vm_enable_cap(s, capability, cap_flags, ...) \
({ \
struct kvm_enable_cap cap = { \

13
kvm-all.c
View File

@ -493,6 +493,19 @@ int kvm_check_extension(KVMState *s, unsigned int extension)
return ret;
}
int kvm_vm_check_extension(KVMState *s, unsigned int extension)
{
int ret;
ret = kvm_vm_ioctl(s, KVM_CHECK_EXTENSION, extension);
if (ret < 0) {
/* VM wide version not implemented, use global one instead */
ret = kvm_check_extension(s, extension);
}
return ret;
}
static int kvm_set_ioeventfd_mmio(int fd, hwaddr addr, uint32_t val,
bool assign, uint32_t size, bool datamatch)
{