Adding upstream version 5.10.209.upstream/5.10.209

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 190 insertions, 0 deletions

diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c b/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c
new file mode 100644
index 000000000..745b708c2
--- /dev/null
+++ b/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c
@@ -0,0 +1,190 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Test for x86 KVM_CAP_HYPERV_CPUID
+ *
+ * Copyright (C) 2018, Red Hat, Inc.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2.
+ *
+ */
+
+#define _GNU_SOURCE /* for program_invocation_short_name */
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/ioctl.h>
+
+#include "test_util.h"
+#include "kvm_util.h"
+#include "processor.h"
+#include "vmx.h"
+
+#define VCPU_ID 0
+
+static void guest_code(void)
+{
+}
+
+static bool smt_possible(void)
+{
+	char buf[16];
+	FILE *f;
+	bool res = true;
+
+	f = fopen("/sys/devices/system/cpu/smt/control", "r");
+	if (f) {
+		if (fread(buf, sizeof(*buf), sizeof(buf), f) > 0) {
+			if (!strncmp(buf, "forceoff", 8) ||
+			    !strncmp(buf, "notsupported", 12))
+				res = false;
+		}
+		fclose(f);
+	}
+
+	return res;
+}
+
+static void test_hv_cpuid(struct kvm_cpuid2 *hv_cpuid_entries,
+			  bool evmcs_enabled)
+{
+	int i;
+	int nent = 9;
+	u32 test_val;
+
+	if (evmcs_enabled)
+		nent += 1; /* 0x4000000A */
+
+	TEST_ASSERT(hv_cpuid_entries->nent == nent,
+		    "KVM_GET_SUPPORTED_HV_CPUID should return %d entries"
+		    " with evmcs=%d (returned %d)",
+		    nent, evmcs_enabled, hv_cpuid_entries->nent);
+
+	for (i = 0; i < hv_cpuid_entries->nent; i++) {
+		struct kvm_cpuid_entry2 *entry = &hv_cpuid_entries->entries[i];
+
+		TEST_ASSERT((entry->function >= 0x40000000) &&
+			    (entry->function <= 0x40000082),
+			    "function %x is our of supported range",
+			    entry->function);
+
+		TEST_ASSERT(evmcs_enabled || (entry->function != 0x4000000A),
+			    "0x4000000A leaf should not be reported");
+
+		TEST_ASSERT(entry->index == 0,
+			    ".index field should be zero");
+
+		TEST_ASSERT(entry->flags == 0,
+			    ".flags field should be zero");
+
+		TEST_ASSERT(!entry->padding[0] && !entry->padding[1] &&
+			    !entry->padding[2], "padding should be zero");
+
+		switch (entry->function) {
+		case 0x40000000:
+			test_val = 0x40000082;
+
+			TEST_ASSERT(entry->eax == test_val,
+				    "Wrong max leaf report in 0x40000000.EAX: %x"
+				    " (evmcs=%d)",
+				    entry->eax, evmcs_enabled
+				);
+			break;
+		case 0x40000004:
+			test_val = entry->eax & (1UL << 18);
+
+			TEST_ASSERT(!!test_val == !smt_possible(),
+				    "NoNonArchitecturalCoreSharing bit"
+				    " doesn't reflect SMT setting");
+			break;
+		}
+
+		/*
+		 * If needed for debug:
+		 * fprintf(stdout,
+		 *	"CPUID%lx EAX=0x%lx EBX=0x%lx ECX=0x%lx EDX=0x%lx\n",
+		 *	entry->function, entry->eax, entry->ebx, entry->ecx,
+		 *	entry->edx);
+		 */
+	}
+
+}
+
+void test_hv_cpuid_e2big(struct kvm_vm *vm)
+{
+	static struct kvm_cpuid2 cpuid = {.nent = 0};
+	int ret;
+
+	ret = _vcpu_ioctl(vm, VCPU_ID, KVM_GET_SUPPORTED_HV_CPUID, &cpuid);
+
+	TEST_ASSERT(ret == -1 && errno == E2BIG,
+		    "KVM_GET_SUPPORTED_HV_CPUID didn't fail with -E2BIG when"
+		    " it should have: %d %d", ret, errno);
+}
+
+
+struct kvm_cpuid2 *kvm_get_supported_hv_cpuid(struct kvm_vm *vm)
+{
+	int nent = 20; /* should be enough */
+	static struct kvm_cpuid2 *cpuid;
+
+	cpuid = malloc(sizeof(*cpuid) + nent * sizeof(struct kvm_cpuid_entry2));
+
+	if (!cpuid) {
+		perror("malloc");
+		abort();
+	}
+
+	cpuid->nent = nent;
+
+	vcpu_ioctl(vm, VCPU_ID, KVM_GET_SUPPORTED_HV_CPUID, cpuid);
+
+	return cpuid;
+}
+
+
+int main(int argc, char *argv[])
+{
+	struct kvm_vm *vm;
+	int rv, stage;
+	struct kvm_cpuid2 *hv_cpuid_entries;
+	bool evmcs_enabled;
+
+	/* Tell stdout not to buffer its content */
+	setbuf(stdout, NULL);
+
+	rv = kvm_check_cap(KVM_CAP_HYPERV_CPUID);
+	if (!rv) {
+		print_skip("KVM_CAP_HYPERV_CPUID not supported");
+		exit(KSFT_SKIP);
+	}
+
+	for (stage = 0; stage < 3; stage++) {
+		evmcs_enabled = false;
+
+		vm = vm_create_default(VCPU_ID, 0, guest_code);
+		switch (stage) {
+		case 0:
+			test_hv_cpuid_e2big(vm);
+			continue;
+		case 1:
+			break;
+		case 2:
+			if (!nested_vmx_supported() ||
+			    !kvm_check_cap(KVM_CAP_HYPERV_ENLIGHTENED_VMCS)) {
+				print_skip("Enlightened VMCS is unsupported");
+				continue;
+			}
+			vcpu_enable_evmcs(vm, VCPU_ID);
+			evmcs_enabled = true;
+			break;
+		}
+
+		hv_cpuid_entries = kvm_get_supported_hv_cpuid(vm);
+		test_hv_cpuid(hv_cpuid_entries, evmcs_enabled);
+		free(hv_cpuid_entries);
+		kvm_vm_free(vm);
+	}
+
+	return 0;
+}