diff options
Diffstat (limited to 'kvm-all.c')
| -rw-r--r-- | kvm-all.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/kvm-all.c b/kvm-all.c index de1924c467..0be4615cdb 100644 --- a/kvm-all.c +++ b/kvm-all.c @@ -24,6 +24,7 @@ #include "qemu/atomic.h" #include "qemu/option.h" #include "qemu/config-file.h" +#include "qemu/error-report.h" #include "hw/hw.h" #include "hw/pci/msi.h" #include "hw/s390x/adapter.h" @@ -2008,6 +2009,39 @@ int kvm_vm_check_attr(KVMState *s, uint32_t group, uint64_t attr) return ret ? 0 : 1; } +int kvm_device_check_attr(int dev_fd, uint32_t group, uint64_t attr) +{ + struct kvm_device_attr attribute = { + .group = group, + .attr = attr, + .flags = 0, + }; + + return kvm_device_ioctl(dev_fd, KVM_HAS_DEVICE_ATTR, &attribute) ? 0 : 1; +} + +void kvm_device_access(int fd, int group, uint64_t attr, + void *val, bool write) +{ + struct kvm_device_attr kvmattr; + int err; + + kvmattr.flags = 0; + kvmattr.group = group; + kvmattr.attr = attr; + kvmattr.addr = (uintptr_t)val; + + err = kvm_device_ioctl(fd, + write ? KVM_SET_DEVICE_ATTR : KVM_GET_DEVICE_ATTR, + &kvmattr); + if (err < 0) { + error_report("KVM_%s_DEVICE_ATTR failed: %s\n" + "Group %d attr 0x%016" PRIx64, write ? "SET" : "GET", + strerror(-err), group, attr); + abort(); + } +} + int kvm_has_sync_mmu(void) { return kvm_check_extension(kvm_state, KVM_CAP_SYNC_MMU); |