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authorLinus Torvalds <torvalds@linux-foundation.org>2019-06-20 13:50:37 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2019-06-20 13:50:37 -0700
commitb3e978337b25b042aa653652a029e3d798814c12 (patch)
treef03c4b0b6d9eadb4cef3daa8c1f9920415cdcefe /tools
parente929387449cf631e96840296a01922be1ef3c832 (diff)
parentb21e31b253048b7f9768ca7cc270e67765fd6ba2 (diff)
downloadlinux-b3e978337b25b042aa653652a029e3d798814c12.tar.bz2
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull kvm fixes from Paolo Bonzini: "Fixes for ARM and x86, plus selftest patches and nicer structs for nested state save/restore" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: KVM: nVMX: reorganize initial steps of vmx_set_nested_state KVM: arm/arm64: Fix emulated ptimer irq injection tests: kvm: Check for a kernel warning kvm: tests: Sort tests in the Makefile alphabetically KVM: x86/mmu: Allocate PAE root array when using SVM's 32-bit NPT KVM: x86: Modify struct kvm_nested_state to have explicit fields for data KVM: fix typo in documentation KVM: nVMX: use correct clean fields when copying from eVMCS KVM: arm/arm64: vgic: Fix kvm_device leak in vgic_its_destroy KVM: arm64: Filter out invalid core register IDs in KVM_GET_REG_LIST KVM: arm64: Implement vq_present() as a macro
Diffstat (limited to 'tools')
-rw-r--r--tools/arch/x86/include/uapi/asm/kvm.h2
-rw-r--r--tools/testing/selftests/kvm/.gitignore1
-rw-r--r--tools/testing/selftests/kvm/Makefile21
-rw-r--r--tools/testing/selftests/kvm/include/kvm_util.h2
-rw-r--r--tools/testing/selftests/kvm/include/x86_64/processor.h2
-rw-r--r--tools/testing/selftests/kvm/lib/kvm_util.c36
-rw-r--r--tools/testing/selftests/kvm/lib/x86_64/processor.c16
-rw-r--r--tools/testing/selftests/kvm/x86_64/mmio_warning_test.c126
-rw-r--r--tools/testing/selftests/kvm/x86_64/vmx_set_nested_state_test.c68
9 files changed, 233 insertions, 41 deletions
diff --git a/tools/arch/x86/include/uapi/asm/kvm.h b/tools/arch/x86/include/uapi/asm/kvm.h
index 7a0e64ccd6ff..24a8cd229df6 100644
--- a/tools/arch/x86/include/uapi/asm/kvm.h
+++ b/tools/arch/x86/include/uapi/asm/kvm.h
@@ -392,7 +392,7 @@ struct kvm_sync_regs {
struct kvm_vmx_nested_state {
__u64 vmxon_pa;
- __u64 vmcs_pa;
+ __u64 vmcs12_pa;
struct {
__u16 flags;
diff --git a/tools/testing/selftests/kvm/.gitignore b/tools/testing/selftests/kvm/.gitignore
index df1bf9230a74..41266af0d3dc 100644
--- a/tools/testing/selftests/kvm/.gitignore
+++ b/tools/testing/selftests/kvm/.gitignore
@@ -2,6 +2,7 @@
/x86_64/evmcs_test
/x86_64/hyperv_cpuid
/x86_64/kvm_create_max_vcpus
+/x86_64/mmio_warning_test
/x86_64/platform_info_test
/x86_64/set_sregs_test
/x86_64/smm_test
diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile
index 41280dc06297..62afd0b43074 100644
--- a/tools/testing/selftests/kvm/Makefile
+++ b/tools/testing/selftests/kvm/Makefile
@@ -11,23 +11,24 @@ LIBKVM = lib/assert.c lib/elf.c lib/io.c lib/kvm_util.c lib/ucall.c lib/sparsebi
LIBKVM_x86_64 = lib/x86_64/processor.c lib/x86_64/vmx.c
LIBKVM_aarch64 = lib/aarch64/processor.c
-TEST_GEN_PROGS_x86_64 = x86_64/platform_info_test
-TEST_GEN_PROGS_x86_64 += x86_64/set_sregs_test
-TEST_GEN_PROGS_x86_64 += x86_64/sync_regs_test
-TEST_GEN_PROGS_x86_64 += x86_64/vmx_tsc_adjust_test
-TEST_GEN_PROGS_x86_64 += x86_64/cr4_cpuid_sync_test
-TEST_GEN_PROGS_x86_64 += x86_64/state_test
+TEST_GEN_PROGS_x86_64 = x86_64/cr4_cpuid_sync_test
TEST_GEN_PROGS_x86_64 += x86_64/evmcs_test
TEST_GEN_PROGS_x86_64 += x86_64/hyperv_cpuid
-TEST_GEN_PROGS_x86_64 += x86_64/vmx_close_while_nested_test
-TEST_GEN_PROGS_x86_64 += x86_64/smm_test
TEST_GEN_PROGS_x86_64 += x86_64/kvm_create_max_vcpus
+TEST_GEN_PROGS_x86_64 += x86_64/mmio_warning_test
+TEST_GEN_PROGS_x86_64 += x86_64/platform_info_test
+TEST_GEN_PROGS_x86_64 += x86_64/set_sregs_test
+TEST_GEN_PROGS_x86_64 += x86_64/smm_test
+TEST_GEN_PROGS_x86_64 += x86_64/state_test
+TEST_GEN_PROGS_x86_64 += x86_64/sync_regs_test
+TEST_GEN_PROGS_x86_64 += x86_64/vmx_close_while_nested_test
TEST_GEN_PROGS_x86_64 += x86_64/vmx_set_nested_state_test
-TEST_GEN_PROGS_x86_64 += dirty_log_test
+TEST_GEN_PROGS_x86_64 += x86_64/vmx_tsc_adjust_test
TEST_GEN_PROGS_x86_64 += clear_dirty_log_test
+TEST_GEN_PROGS_x86_64 += dirty_log_test
-TEST_GEN_PROGS_aarch64 += dirty_log_test
TEST_GEN_PROGS_aarch64 += clear_dirty_log_test
+TEST_GEN_PROGS_aarch64 += dirty_log_test
TEST_GEN_PROGS += $(TEST_GEN_PROGS_$(UNAME_M))
LIBKVM += $(LIBKVM_$(UNAME_M))
diff --git a/tools/testing/selftests/kvm/include/kvm_util.h b/tools/testing/selftests/kvm/include/kvm_util.h
index a5a4b28f14d8..bd8eb5579028 100644
--- a/tools/testing/selftests/kvm/include/kvm_util.h
+++ b/tools/testing/selftests/kvm/include/kvm_util.h
@@ -139,6 +139,8 @@ struct kvm_vm *vm_create_default(uint32_t vcpuid, uint64_t extra_mem_size,
void *guest_code);
void vm_vcpu_add_default(struct kvm_vm *vm, uint32_t vcpuid, void *guest_code);
+bool vm_is_unrestricted_guest(struct kvm_vm *vm);
+
struct kvm_userspace_memory_region *
kvm_userspace_memory_region_find(struct kvm_vm *vm, uint64_t start,
uint64_t end);
diff --git a/tools/testing/selftests/kvm/include/x86_64/processor.h b/tools/testing/selftests/kvm/include/x86_64/processor.h
index 6063d5b2f356..af4d26de32d1 100644
--- a/tools/testing/selftests/kvm/include/x86_64/processor.h
+++ b/tools/testing/selftests/kvm/include/x86_64/processor.h
@@ -303,6 +303,8 @@ static inline unsigned long get_xmm(int n)
return 0;
}
+bool is_intel_cpu(void);
+
struct kvm_x86_state;
struct kvm_x86_state *vcpu_save_state(struct kvm_vm *vm, uint32_t vcpuid);
void vcpu_load_state(struct kvm_vm *vm, uint32_t vcpuid,
diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
index 633b22df46a4..267f2353e4ab 100644
--- a/tools/testing/selftests/kvm/lib/kvm_util.c
+++ b/tools/testing/selftests/kvm/lib/kvm_util.c
@@ -1583,3 +1583,39 @@ void *addr_gva2hva(struct kvm_vm *vm, vm_vaddr_t gva)
{
return addr_gpa2hva(vm, addr_gva2gpa(vm, gva));
}
+
+/*
+ * Is Unrestricted Guest
+ *
+ * Input Args:
+ * vm - Virtual Machine
+ *
+ * Output Args: None
+ *
+ * Return: True if the unrestricted guest is set to 'Y', otherwise return false.
+ *
+ * Check if the unrestricted guest flag is enabled.
+ */
+bool vm_is_unrestricted_guest(struct kvm_vm *vm)
+{
+ char val = 'N';
+ size_t count;
+ FILE *f;
+
+ if (vm == NULL) {
+ /* Ensure that the KVM vendor-specific module is loaded. */
+ f = fopen(KVM_DEV_PATH, "r");
+ TEST_ASSERT(f != NULL, "Error in opening KVM dev file: %d",
+ errno);
+ fclose(f);
+ }
+
+ f = fopen("/sys/module/kvm_intel/parameters/unrestricted_guest", "r");
+ if (f) {
+ count = fread(&val, sizeof(char), 1, f);
+ TEST_ASSERT(count == 1, "Unable to read from param file.");
+ fclose(f);
+ }
+
+ return val == 'Y';
+}
diff --git a/tools/testing/selftests/kvm/lib/x86_64/processor.c b/tools/testing/selftests/kvm/lib/x86_64/processor.c
index 21f3040d90cb..2fe78bdf3bee 100644
--- a/tools/testing/selftests/kvm/lib/x86_64/processor.c
+++ b/tools/testing/selftests/kvm/lib/x86_64/processor.c
@@ -1137,3 +1137,19 @@ void vcpu_load_state(struct kvm_vm *vm, uint32_t vcpuid, struct kvm_x86_state *s
r);
}
}
+
+bool is_intel_cpu(void)
+{
+ int eax, ebx, ecx, edx;
+ const uint32_t *chunk;
+ const int leaf = 0;
+
+ __asm__ __volatile__(
+ "cpuid"
+ : /* output */ "=a"(eax), "=b"(ebx),
+ "=c"(ecx), "=d"(edx)
+ : /* input */ "0"(leaf), "2"(0));
+
+ chunk = (const uint32_t *)("GenuineIntel");
+ return (ebx == chunk[0] && edx == chunk[1] && ecx == chunk[2]);
+}
diff --git a/tools/testing/selftests/kvm/x86_64/mmio_warning_test.c b/tools/testing/selftests/kvm/x86_64/mmio_warning_test.c
new file mode 100644
index 000000000000..00bb97d76000
--- /dev/null
+++ b/tools/testing/selftests/kvm/x86_64/mmio_warning_test.c
@@ -0,0 +1,126 @@
+/*
+ * mmio_warning_test
+ *
+ * Copyright (C) 2019, Google LLC.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2.
+ *
+ * Test that we don't get a kernel warning when we call KVM_RUN after a
+ * triple fault occurs. To get the triple fault to occur we call KVM_RUN
+ * on a VCPU that hasn't been properly setup.
+ *
+ */
+
+#define _GNU_SOURCE
+#include <fcntl.h>
+#include <kvm_util.h>
+#include <linux/kvm.h>
+#include <processor.h>
+#include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <test_util.h>
+#include <unistd.h>
+
+#define NTHREAD 4
+#define NPROCESS 5
+
+struct thread_context {
+ int kvmcpu;
+ struct kvm_run *run;
+};
+
+void *thr(void *arg)
+{
+ struct thread_context *tc = (struct thread_context *)arg;
+ int res;
+ int kvmcpu = tc->kvmcpu;
+ struct kvm_run *run = tc->run;
+
+ res = ioctl(kvmcpu, KVM_RUN, 0);
+ printf("ret1=%d exit_reason=%d suberror=%d\n",
+ res, run->exit_reason, run->internal.suberror);
+
+ return 0;
+}
+
+void test(void)
+{
+ int i, kvm, kvmvm, kvmcpu;
+ pthread_t th[NTHREAD];
+ struct kvm_run *run;
+ struct thread_context tc;
+
+ kvm = open("/dev/kvm", O_RDWR);
+ TEST_ASSERT(kvm != -1, "failed to open /dev/kvm");
+ kvmvm = ioctl(kvm, KVM_CREATE_VM, 0);
+ TEST_ASSERT(kvmvm != -1, "KVM_CREATE_VM failed");
+ kvmcpu = ioctl(kvmvm, KVM_CREATE_VCPU, 0);
+ TEST_ASSERT(kvmcpu != -1, "KVM_CREATE_VCPU failed");
+ run = (struct kvm_run *)mmap(0, 4096, PROT_READ|PROT_WRITE, MAP_SHARED,
+ kvmcpu, 0);
+ tc.kvmcpu = kvmcpu;
+ tc.run = run;
+ srand(getpid());
+ for (i = 0; i < NTHREAD; i++) {
+ pthread_create(&th[i], NULL, thr, (void *)(uintptr_t)&tc);
+ usleep(rand() % 10000);
+ }
+ for (i = 0; i < NTHREAD; i++)
+ pthread_join(th[i], NULL);
+}
+
+int get_warnings_count(void)
+{
+ int warnings;
+ FILE *f;
+
+ f = popen("dmesg | grep \"WARNING:\" | wc -l", "r");
+ fscanf(f, "%d", &warnings);
+ fclose(f);
+
+ return warnings;
+}
+
+int main(void)
+{
+ int warnings_before, warnings_after;
+
+ if (!is_intel_cpu()) {
+ printf("Must be run on an Intel CPU, skipping test\n");
+ exit(KSFT_SKIP);
+ }
+
+ if (vm_is_unrestricted_guest(NULL)) {
+ printf("Unrestricted guest must be disabled, skipping test\n");
+ exit(KSFT_SKIP);
+ }
+
+ warnings_before = get_warnings_count();
+
+ for (int i = 0; i < NPROCESS; ++i) {
+ int status;
+ int pid = fork();
+
+ if (pid < 0)
+ exit(1);
+ if (pid == 0) {
+ test();
+ exit(0);
+ }
+ while (waitpid(pid, &status, __WALL) != pid)
+ ;
+ }
+
+ warnings_after = get_warnings_count();
+ TEST_ASSERT(warnings_before == warnings_after,
+ "Warnings found in kernel. Run 'dmesg' to inspect them.");
+
+ return 0;
+}
diff --git a/tools/testing/selftests/kvm/x86_64/vmx_set_nested_state_test.c b/tools/testing/selftests/kvm/x86_64/vmx_set_nested_state_test.c
index 9d62e2c7e024..e64ca20b315a 100644
--- a/tools/testing/selftests/kvm/x86_64/vmx_set_nested_state_test.c
+++ b/tools/testing/selftests/kvm/x86_64/vmx_set_nested_state_test.c
@@ -75,7 +75,7 @@ void set_revision_id_for_vmcs12(struct kvm_nested_state *state,
u32 vmcs12_revision)
{
/* Set revision_id in vmcs12 to vmcs12_revision. */
- memcpy(state->data, &vmcs12_revision, sizeof(u32));
+ memcpy(&state->data, &vmcs12_revision, sizeof(u32));
}
void set_default_state(struct kvm_nested_state *state)
@@ -95,9 +95,9 @@ void set_default_vmx_state(struct kvm_nested_state *state, int size)
KVM_STATE_NESTED_EVMCS;
state->format = 0;
state->size = size;
- state->vmx.vmxon_pa = 0x1000;
- state->vmx.vmcs_pa = 0x2000;
- state->vmx.smm.flags = 0;
+ state->hdr.vmx.vmxon_pa = 0x1000;
+ state->hdr.vmx.vmcs12_pa = 0x2000;
+ state->hdr.vmx.smm.flags = 0;
set_revision_id_for_vmcs12(state, VMCS12_REVISION);
}
@@ -123,39 +123,47 @@ void test_vmx_nested_state(struct kvm_vm *vm)
/*
* We cannot virtualize anything if the guest does not have VMX
* enabled. We expect KVM_SET_NESTED_STATE to return 0 if vmxon_pa
- * is set to -1ull.
+ * is set to -1ull, but the flags must be zero.
*/
set_default_vmx_state(state, state_sz);
- state->vmx.vmxon_pa = -1ull;
+ state->hdr.vmx.vmxon_pa = -1ull;
+ test_nested_state_expect_einval(vm, state);
+
+ state->hdr.vmx.vmcs12_pa = -1ull;
+ state->flags = KVM_STATE_NESTED_EVMCS;
+ test_nested_state_expect_einval(vm, state);
+
+ state->flags = 0;
test_nested_state(vm, state);
/* Enable VMX in the guest CPUID. */
vcpu_set_cpuid(vm, VCPU_ID, kvm_get_supported_cpuid());
- /* It is invalid to have vmxon_pa == -1ull and SMM flags non-zero. */
+ /*
+ * Setting vmxon_pa == -1ull and vmcs_pa == -1ull exits early without
+ * setting the nested state but flags other than eVMCS must be clear.
+ */
set_default_vmx_state(state, state_sz);
- state->vmx.vmxon_pa = -1ull;
- state->vmx.smm.flags = 1;
+ state->hdr.vmx.vmxon_pa = -1ull;
+ state->hdr.vmx.vmcs12_pa = -1ull;
test_nested_state_expect_einval(vm, state);
- /* It is invalid to have vmxon_pa == -1ull and vmcs_pa != -1ull. */
- set_default_vmx_state(state, state_sz);
- state->vmx.vmxon_pa = -1ull;
- state->vmx.vmcs_pa = 0;
+ state->flags = KVM_STATE_NESTED_EVMCS;
+ test_nested_state(vm, state);
+
+ /* It is invalid to have vmxon_pa == -1ull and SMM flags non-zero. */
+ state->hdr.vmx.smm.flags = 1;
test_nested_state_expect_einval(vm, state);
- /*
- * Setting vmxon_pa == -1ull and vmcs_pa == -1ull exits early without
- * setting the nested state.
- */
+ /* It is invalid to have vmxon_pa == -1ull and vmcs_pa != -1ull. */
set_default_vmx_state(state, state_sz);
- state->vmx.vmxon_pa = -1ull;
- state->vmx.vmcs_pa = -1ull;
- test_nested_state(vm, state);
+ state->hdr.vmx.vmxon_pa = -1ull;
+ state->flags = 0;
+ test_nested_state_expect_einval(vm, state);
/* It is invalid to have vmxon_pa set to a non-page aligned address. */
set_default_vmx_state(state, state_sz);
- state->vmx.vmxon_pa = 1;
+ state->hdr.vmx.vmxon_pa = 1;
test_nested_state_expect_einval(vm, state);
/*
@@ -165,7 +173,7 @@ void test_vmx_nested_state(struct kvm_vm *vm)
set_default_vmx_state(state, state_sz);
state->flags = KVM_STATE_NESTED_GUEST_MODE |
KVM_STATE_NESTED_RUN_PENDING;
- state->vmx.smm.flags = KVM_STATE_NESTED_SMM_GUEST_MODE;
+ state->hdr.vmx.smm.flags = KVM_STATE_NESTED_SMM_GUEST_MODE;
test_nested_state_expect_einval(vm, state);
/*
@@ -174,14 +182,14 @@ void test_vmx_nested_state(struct kvm_vm *vm)
* KVM_STATE_NESTED_SMM_VMXON
*/
set_default_vmx_state(state, state_sz);
- state->vmx.smm.flags = ~(KVM_STATE_NESTED_SMM_GUEST_MODE |
+ state->hdr.vmx.smm.flags = ~(KVM_STATE_NESTED_SMM_GUEST_MODE |
KVM_STATE_NESTED_SMM_VMXON);
test_nested_state_expect_einval(vm, state);
/* Outside SMM, SMM flags must be zero. */
set_default_vmx_state(state, state_sz);
state->flags = 0;
- state->vmx.smm.flags = KVM_STATE_NESTED_SMM_GUEST_MODE;
+ state->hdr.vmx.smm.flags = KVM_STATE_NESTED_SMM_GUEST_MODE;
test_nested_state_expect_einval(vm, state);
/* Size must be large enough to fit kvm_nested_state and vmcs12. */
@@ -191,8 +199,8 @@ void test_vmx_nested_state(struct kvm_vm *vm)
/* vmxon_pa cannot be the same address as vmcs_pa. */
set_default_vmx_state(state, state_sz);
- state->vmx.vmxon_pa = 0;
- state->vmx.vmcs_pa = 0;
+ state->hdr.vmx.vmxon_pa = 0;
+ state->hdr.vmx.vmcs12_pa = 0;
test_nested_state_expect_einval(vm, state);
/* The revision id for vmcs12 must be VMCS12_REVISION. */
@@ -205,16 +213,16 @@ void test_vmx_nested_state(struct kvm_vm *vm)
* it again.
*/
set_default_vmx_state(state, state_sz);
- state->vmx.vmxon_pa = -1ull;
- state->vmx.vmcs_pa = -1ull;
+ state->hdr.vmx.vmxon_pa = -1ull;
+ state->hdr.vmx.vmcs12_pa = -1ull;
state->flags = 0;
test_nested_state(vm, state);
vcpu_nested_state_get(vm, VCPU_ID, state);
TEST_ASSERT(state->size >= sizeof(*state) && state->size <= state_sz,
"Size must be between %d and %d. The size returned was %d.",
sizeof(*state), state_sz, state->size);
- TEST_ASSERT(state->vmx.vmxon_pa == -1ull, "vmxon_pa must be -1ull.");
- TEST_ASSERT(state->vmx.vmcs_pa == -1ull, "vmcs_pa must be -1ull.");
+ TEST_ASSERT(state->hdr.vmx.vmxon_pa == -1ull, "vmxon_pa must be -1ull.");
+ TEST_ASSERT(state->hdr.vmx.vmcs12_pa == -1ull, "vmcs_pa must be -1ull.");
free(state);
}