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Diffstat (limited to 'tools/testing/selftests/kvm/lib/x86_64/hyperv.c')
-rw-r--r--tools/testing/selftests/kvm/lib/x86_64/hyperv.c67
1 files changed, 67 insertions, 0 deletions
diff --git a/tools/testing/selftests/kvm/lib/x86_64/hyperv.c b/tools/testing/selftests/kvm/lib/x86_64/hyperv.c
index efb7e7a1354d..15bc8cd583aa 100644
--- a/tools/testing/selftests/kvm/lib/x86_64/hyperv.c
+++ b/tools/testing/selftests/kvm/lib/x86_64/hyperv.c
@@ -8,6 +8,73 @@
#include "processor.h"
#include "hyperv.h"
+const struct kvm_cpuid2 *kvm_get_supported_hv_cpuid(void)
+{
+ static struct kvm_cpuid2 *cpuid;
+ int kvm_fd;
+
+ if (cpuid)
+ return cpuid;
+
+ cpuid = allocate_kvm_cpuid2(MAX_NR_CPUID_ENTRIES);
+ kvm_fd = open_kvm_dev_path_or_exit();
+
+ kvm_ioctl(kvm_fd, KVM_GET_SUPPORTED_HV_CPUID, cpuid);
+
+ close(kvm_fd);
+ return cpuid;
+}
+
+void vcpu_set_hv_cpuid(struct kvm_vcpu *vcpu)
+{
+ static struct kvm_cpuid2 *cpuid_full;
+ const struct kvm_cpuid2 *cpuid_sys, *cpuid_hv;
+ int i, nent = 0;
+
+ if (!cpuid_full) {
+ cpuid_sys = kvm_get_supported_cpuid();
+ cpuid_hv = kvm_get_supported_hv_cpuid();
+
+ cpuid_full = allocate_kvm_cpuid2(cpuid_sys->nent + cpuid_hv->nent);
+ if (!cpuid_full) {
+ perror("malloc");
+ abort();
+ }
+
+ /* Need to skip KVM CPUID leaves 0x400000xx */
+ for (i = 0; i < cpuid_sys->nent; i++) {
+ if (cpuid_sys->entries[i].function >= 0x40000000 &&
+ cpuid_sys->entries[i].function < 0x40000100)
+ continue;
+ cpuid_full->entries[nent] = cpuid_sys->entries[i];
+ nent++;
+ }
+
+ memcpy(&cpuid_full->entries[nent], cpuid_hv->entries,
+ cpuid_hv->nent * sizeof(struct kvm_cpuid_entry2));
+ cpuid_full->nent = nent + cpuid_hv->nent;
+ }
+
+ vcpu_init_cpuid(vcpu, cpuid_full);
+}
+
+const struct kvm_cpuid2 *vcpu_get_supported_hv_cpuid(struct kvm_vcpu *vcpu)
+{
+ struct kvm_cpuid2 *cpuid = allocate_kvm_cpuid2(MAX_NR_CPUID_ENTRIES);
+
+ vcpu_ioctl(vcpu, KVM_GET_SUPPORTED_HV_CPUID, cpuid);
+
+ return cpuid;
+}
+
+bool kvm_hv_cpu_has(struct kvm_x86_cpu_feature feature)
+{
+ if (!kvm_has_cap(KVM_CAP_SYS_HYPERV_CPUID))
+ return false;
+
+ return kvm_cpuid_has(kvm_get_supported_hv_cpuid(), feature);
+}
+
struct hyperv_test_pages *vcpu_alloc_hyperv_test_pages(struct kvm_vm *vm,
vm_vaddr_t *p_hv_pages_gva)
{