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-rw-r--r--tools/testing/selftests/kvm/lib/aarch64/processor.c91
-rw-r--r--tools/testing/selftests/kvm/lib/kvm_util.c72
-rw-r--r--tools/testing/selftests/kvm/lib/s390x/diag318_test_handler.c3
-rw-r--r--tools/testing/selftests/kvm/lib/test_util.c25
-rw-r--r--tools/testing/selftests/kvm/lib/x86_64/processor.c75
5 files changed, 180 insertions, 86 deletions
diff --git a/tools/testing/selftests/kvm/lib/aarch64/processor.c b/tools/testing/selftests/kvm/lib/aarch64/processor.c
index 5972a23b27654..3a0259e253353 100644
--- a/tools/testing/selftests/kvm/lib/aarch64/processor.c
+++ b/tools/testing/selftests/kvm/lib/aarch64/processor.c
@@ -58,10 +58,27 @@ static uint64_t pte_index(struct kvm_vm *vm, vm_vaddr_t gva)
return (gva >> vm->page_shift) & mask;
}
-static uint64_t pte_addr(struct kvm_vm *vm, uint64_t entry)
+static uint64_t addr_pte(struct kvm_vm *vm, uint64_t pa, uint64_t attrs)
{
- uint64_t mask = ((1UL << (vm->va_bits - vm->page_shift)) - 1) << vm->page_shift;
- return entry & mask;
+ uint64_t pte;
+
+ pte = pa & GENMASK(47, vm->page_shift);
+ if (vm->page_shift == 16)
+ pte |= FIELD_GET(GENMASK(51, 48), pa) << 12;
+ pte |= attrs;
+
+ return pte;
+}
+
+static uint64_t pte_addr(struct kvm_vm *vm, uint64_t pte)
+{
+ uint64_t pa;
+
+ pa = pte & GENMASK(47, vm->page_shift);
+ if (vm->page_shift == 16)
+ pa |= FIELD_GET(GENMASK(15, 12), pte) << 48;
+
+ return pa;
}
static uint64_t ptrs_per_pgd(struct kvm_vm *vm)
@@ -110,18 +127,18 @@ static void _virt_pg_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr,
ptep = addr_gpa2hva(vm, vm->pgd) + pgd_index(vm, vaddr) * 8;
if (!*ptep)
- *ptep = vm_alloc_page_table(vm) | 3;
+ *ptep = addr_pte(vm, vm_alloc_page_table(vm), 3);
switch (vm->pgtable_levels) {
case 4:
ptep = addr_gpa2hva(vm, pte_addr(vm, *ptep)) + pud_index(vm, vaddr) * 8;
if (!*ptep)
- *ptep = vm_alloc_page_table(vm) | 3;
+ *ptep = addr_pte(vm, vm_alloc_page_table(vm), 3);
/* fall through */
case 3:
ptep = addr_gpa2hva(vm, pte_addr(vm, *ptep)) + pmd_index(vm, vaddr) * 8;
if (!*ptep)
- *ptep = vm_alloc_page_table(vm) | 3;
+ *ptep = addr_pte(vm, vm_alloc_page_table(vm), 3);
/* fall through */
case 2:
ptep = addr_gpa2hva(vm, pte_addr(vm, *ptep)) + pte_index(vm, vaddr) * 8;
@@ -130,8 +147,7 @@ static void _virt_pg_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr,
TEST_FAIL("Page table levels must be 2, 3, or 4");
}
- *ptep = paddr | 3;
- *ptep |= (attr_idx << 2) | (1 << 10) /* Access Flag */;
+ *ptep = addr_pte(vm, paddr, (attr_idx << 2) | (1 << 10) | 3); /* AF */
}
void virt_arch_pg_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr)
@@ -226,7 +242,7 @@ void aarch64_vcpu_setup(struct kvm_vcpu *vcpu, struct kvm_vcpu_init *init)
{
struct kvm_vcpu_init default_init = { .target = -1, };
struct kvm_vm *vm = vcpu->vm;
- uint64_t sctlr_el1, tcr_el1;
+ uint64_t sctlr_el1, tcr_el1, ttbr0_el1;
if (!init)
init = &default_init;
@@ -277,10 +293,13 @@ void aarch64_vcpu_setup(struct kvm_vcpu *vcpu, struct kvm_vcpu_init *init)
TEST_FAIL("Unknown guest mode, mode: 0x%x", vm->mode);
}
+ ttbr0_el1 = vm->pgd & GENMASK(47, vm->page_shift);
+
/* Configure output size */
switch (vm->mode) {
case VM_MODE_P52V48_64K:
tcr_el1 |= 6ul << 32; /* IPS = 52 bits */
+ ttbr0_el1 |= FIELD_GET(GENMASK(51, 48), vm->pgd) << 2;
break;
case VM_MODE_P48V48_4K:
case VM_MODE_P48V48_16K:
@@ -310,7 +329,7 @@ void aarch64_vcpu_setup(struct kvm_vcpu *vcpu, struct kvm_vcpu_init *init)
vcpu_set_reg(vcpu, KVM_ARM64_SYS_REG(SYS_SCTLR_EL1), sctlr_el1);
vcpu_set_reg(vcpu, KVM_ARM64_SYS_REG(SYS_TCR_EL1), tcr_el1);
vcpu_set_reg(vcpu, KVM_ARM64_SYS_REG(SYS_MAIR_EL1), DEFAULT_MAIR_EL1);
- vcpu_set_reg(vcpu, KVM_ARM64_SYS_REG(SYS_TTBR0_EL1), vm->pgd);
+ vcpu_set_reg(vcpu, KVM_ARM64_SYS_REG(SYS_TTBR0_EL1), ttbr0_el1);
vcpu_set_reg(vcpu, KVM_ARM64_SYS_REG(SYS_TPIDR_EL1), vcpu->id);
}
@@ -508,29 +527,43 @@ void aarch64_get_supported_page_sizes(uint32_t ipa,
close(kvm_fd);
}
+#define __smccc_call(insn, function_id, arg0, arg1, arg2, arg3, arg4, arg5, \
+ arg6, res) \
+ asm volatile("mov w0, %w[function_id]\n" \
+ "mov x1, %[arg0]\n" \
+ "mov x2, %[arg1]\n" \
+ "mov x3, %[arg2]\n" \
+ "mov x4, %[arg3]\n" \
+ "mov x5, %[arg4]\n" \
+ "mov x6, %[arg5]\n" \
+ "mov x7, %[arg6]\n" \
+ #insn "#0\n" \
+ "mov %[res0], x0\n" \
+ "mov %[res1], x1\n" \
+ "mov %[res2], x2\n" \
+ "mov %[res3], x3\n" \
+ : [res0] "=r"(res->a0), [res1] "=r"(res->a1), \
+ [res2] "=r"(res->a2), [res3] "=r"(res->a3) \
+ : [function_id] "r"(function_id), [arg0] "r"(arg0), \
+ [arg1] "r"(arg1), [arg2] "r"(arg2), [arg3] "r"(arg3), \
+ [arg4] "r"(arg4), [arg5] "r"(arg5), [arg6] "r"(arg6) \
+ : "x0", "x1", "x2", "x3", "x4", "x5", "x6", "x7")
+
+
void smccc_hvc(uint32_t function_id, uint64_t arg0, uint64_t arg1,
uint64_t arg2, uint64_t arg3, uint64_t arg4, uint64_t arg5,
uint64_t arg6, struct arm_smccc_res *res)
{
- asm volatile("mov w0, %w[function_id]\n"
- "mov x1, %[arg0]\n"
- "mov x2, %[arg1]\n"
- "mov x3, %[arg2]\n"
- "mov x4, %[arg3]\n"
- "mov x5, %[arg4]\n"
- "mov x6, %[arg5]\n"
- "mov x7, %[arg6]\n"
- "hvc #0\n"
- "mov %[res0], x0\n"
- "mov %[res1], x1\n"
- "mov %[res2], x2\n"
- "mov %[res3], x3\n"
- : [res0] "=r"(res->a0), [res1] "=r"(res->a1),
- [res2] "=r"(res->a2), [res3] "=r"(res->a3)
- : [function_id] "r"(function_id), [arg0] "r"(arg0),
- [arg1] "r"(arg1), [arg2] "r"(arg2), [arg3] "r"(arg3),
- [arg4] "r"(arg4), [arg5] "r"(arg5), [arg6] "r"(arg6)
- : "x0", "x1", "x2", "x3", "x4", "x5", "x6", "x7");
+ __smccc_call(hvc, function_id, arg0, arg1, arg2, arg3, arg4, arg5,
+ arg6, res);
+}
+
+void smccc_smc(uint32_t function_id, uint64_t arg0, uint64_t arg1,
+ uint64_t arg2, uint64_t arg3, uint64_t arg4, uint64_t arg5,
+ uint64_t arg6, struct arm_smccc_res *res)
+{
+ __smccc_call(smc, function_id, arg0, arg1, arg2, arg3, arg4, arg5,
+ arg6, res);
}
void kvm_selftest_arch_init(void)
diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
index 3ea24a5f4c43e..298c4372fb1ad 100644
--- a/tools/testing/selftests/kvm/lib/kvm_util.c
+++ b/tools/testing/selftests/kvm/lib/kvm_util.c
@@ -80,6 +80,11 @@ static bool get_module_param_bool(const char *module_name, const char *param)
TEST_FAIL("Unrecognized value '%c' for boolean module param", value);
}
+bool get_kvm_param_bool(const char *param)
+{
+ return get_module_param_bool("kvm", param);
+}
+
bool get_kvm_intel_param_bool(const char *param)
{
return get_module_param_bool("kvm_intel", param);
@@ -1815,38 +1820,53 @@ void vm_dump(FILE *stream, struct kvm_vm *vm, uint8_t indent)
vcpu_dump(stream, vcpu, indent + 2);
}
+#define KVM_EXIT_STRING(x) {KVM_EXIT_##x, #x}
+
/* Known KVM exit reasons */
static struct exit_reason {
unsigned int reason;
const char *name;
} exit_reasons_known[] = {
- {KVM_EXIT_UNKNOWN, "UNKNOWN"},
- {KVM_EXIT_EXCEPTION, "EXCEPTION"},
- {KVM_EXIT_IO, "IO"},
- {KVM_EXIT_HYPERCALL, "HYPERCALL"},
- {KVM_EXIT_DEBUG, "DEBUG"},
- {KVM_EXIT_HLT, "HLT"},
- {KVM_EXIT_MMIO, "MMIO"},
- {KVM_EXIT_IRQ_WINDOW_OPEN, "IRQ_WINDOW_OPEN"},
- {KVM_EXIT_SHUTDOWN, "SHUTDOWN"},
- {KVM_EXIT_FAIL_ENTRY, "FAIL_ENTRY"},
- {KVM_EXIT_INTR, "INTR"},
- {KVM_EXIT_SET_TPR, "SET_TPR"},
- {KVM_EXIT_TPR_ACCESS, "TPR_ACCESS"},
- {KVM_EXIT_S390_SIEIC, "S390_SIEIC"},
- {KVM_EXIT_S390_RESET, "S390_RESET"},
- {KVM_EXIT_DCR, "DCR"},
- {KVM_EXIT_NMI, "NMI"},
- {KVM_EXIT_INTERNAL_ERROR, "INTERNAL_ERROR"},
- {KVM_EXIT_OSI, "OSI"},
- {KVM_EXIT_PAPR_HCALL, "PAPR_HCALL"},
- {KVM_EXIT_DIRTY_RING_FULL, "DIRTY_RING_FULL"},
- {KVM_EXIT_X86_RDMSR, "RDMSR"},
- {KVM_EXIT_X86_WRMSR, "WRMSR"},
- {KVM_EXIT_XEN, "XEN"},
- {KVM_EXIT_HYPERV, "HYPERV"},
+ KVM_EXIT_STRING(UNKNOWN),
+ KVM_EXIT_STRING(EXCEPTION),
+ KVM_EXIT_STRING(IO),
+ KVM_EXIT_STRING(HYPERCALL),
+ KVM_EXIT_STRING(DEBUG),
+ KVM_EXIT_STRING(HLT),
+ KVM_EXIT_STRING(MMIO),
+ KVM_EXIT_STRING(IRQ_WINDOW_OPEN),
+ KVM_EXIT_STRING(SHUTDOWN),
+ KVM_EXIT_STRING(FAIL_ENTRY),
+ KVM_EXIT_STRING(INTR),
+ KVM_EXIT_STRING(SET_TPR),
+ KVM_EXIT_STRING(TPR_ACCESS),
+ KVM_EXIT_STRING(S390_SIEIC),
+ KVM_EXIT_STRING(S390_RESET),
+ KVM_EXIT_STRING(DCR),
+ KVM_EXIT_STRING(NMI),
+ KVM_EXIT_STRING(INTERNAL_ERROR),
+ KVM_EXIT_STRING(OSI),
+ KVM_EXIT_STRING(PAPR_HCALL),
+ KVM_EXIT_STRING(S390_UCONTROL),
+ KVM_EXIT_STRING(WATCHDOG),
+ KVM_EXIT_STRING(S390_TSCH),
+ KVM_EXIT_STRING(EPR),
+ KVM_EXIT_STRING(SYSTEM_EVENT),
+ KVM_EXIT_STRING(S390_STSI),
+ KVM_EXIT_STRING(IOAPIC_EOI),
+ KVM_EXIT_STRING(HYPERV),
+ KVM_EXIT_STRING(ARM_NISV),
+ KVM_EXIT_STRING(X86_RDMSR),
+ KVM_EXIT_STRING(X86_WRMSR),
+ KVM_EXIT_STRING(DIRTY_RING_FULL),
+ KVM_EXIT_STRING(AP_RESET_HOLD),
+ KVM_EXIT_STRING(X86_BUS_LOCK),
+ KVM_EXIT_STRING(XEN),
+ KVM_EXIT_STRING(RISCV_SBI),
+ KVM_EXIT_STRING(RISCV_CSR),
+ KVM_EXIT_STRING(NOTIFY),
#ifdef KVM_EXIT_MEMORY_NOT_PRESENT
- {KVM_EXIT_MEMORY_NOT_PRESENT, "MEMORY_NOT_PRESENT"},
+ KVM_EXIT_STRING(MEMORY_NOT_PRESENT),
#endif
};
diff --git a/tools/testing/selftests/kvm/lib/s390x/diag318_test_handler.c b/tools/testing/selftests/kvm/lib/s390x/diag318_test_handler.c
index cdb7daeed5fd9..2c432fa164f19 100644
--- a/tools/testing/selftests/kvm/lib/s390x/diag318_test_handler.c
+++ b/tools/testing/selftests/kvm/lib/s390x/diag318_test_handler.c
@@ -35,8 +35,7 @@ static uint64_t diag318_handler(void)
vcpu_run(vcpu);
run = vcpu->run;
- TEST_ASSERT(run->exit_reason == KVM_EXIT_S390_SIEIC,
- "DIAGNOSE 0x0318 instruction was not intercepted");
+ TEST_ASSERT_KVM_EXIT_REASON(vcpu, KVM_EXIT_S390_SIEIC);
TEST_ASSERT(run->s390_sieic.icptcode == ICPT_INSTRUCTION,
"Unexpected intercept code: 0x%x", run->s390_sieic.icptcode);
TEST_ASSERT((run->s390_sieic.ipa & 0xff00) == IPA0_DIAG,
diff --git a/tools/testing/selftests/kvm/lib/test_util.c b/tools/testing/selftests/kvm/lib/test_util.c
index 5c22fa4c2825e..b772193f6c186 100644
--- a/tools/testing/selftests/kvm/lib/test_util.c
+++ b/tools/testing/selftests/kvm/lib/test_util.c
@@ -165,26 +165,33 @@ size_t get_trans_hugepagesz(void)
size_t get_def_hugetlb_pagesz(void)
{
char buf[64];
- const char *tag = "Hugepagesize:";
+ const char *hugepagesize = "Hugepagesize:";
+ const char *hugepages_total = "HugePages_Total:";
FILE *f;
f = fopen("/proc/meminfo", "r");
TEST_ASSERT(f != NULL, "Error in opening /proc/meminfo");
while (fgets(buf, sizeof(buf), f) != NULL) {
- if (strstr(buf, tag) == buf) {
+ if (strstr(buf, hugepages_total) == buf) {
+ unsigned long long total = strtoull(buf + strlen(hugepages_total), NULL, 10);
+ if (!total) {
+ fprintf(stderr, "HUGETLB is not enabled in /proc/sys/vm/nr_hugepages\n");
+ exit(KSFT_SKIP);
+ }
+ }
+ if (strstr(buf, hugepagesize) == buf) {
fclose(f);
- return strtoull(buf + strlen(tag), NULL, 10) << 10;
+ return strtoull(buf + strlen(hugepagesize), NULL, 10) << 10;
}
}
- if (feof(f))
- TEST_FAIL("HUGETLB is not configured in host kernel");
- else
- TEST_FAIL("Error in reading /proc/meminfo");
+ if (feof(f)) {
+ fprintf(stderr, "HUGETLB is not configured in host kernel");
+ exit(KSFT_SKIP);
+ }
- fclose(f);
- return 0;
+ TEST_FAIL("Error in reading /proc/meminfo");
}
#define ANON_FLAGS (MAP_PRIVATE | MAP_ANONYMOUS)
diff --git a/tools/testing/selftests/kvm/lib/x86_64/processor.c b/tools/testing/selftests/kvm/lib/x86_64/processor.c
index ae1e573d94ce7..d4a0b504b1e0a 100644
--- a/tools/testing/selftests/kvm/lib/x86_64/processor.c
+++ b/tools/testing/selftests/kvm/lib/x86_64/processor.c
@@ -5,6 +5,7 @@
* Copyright (C) 2018, Google LLC.
*/
+#include "linux/bitmap.h"
#include "test_util.h"
#include "kvm_util.h"
#include "processor.h"
@@ -573,6 +574,21 @@ struct kvm_vcpu *vm_arch_vcpu_add(struct kvm_vm *vm, uint32_t vcpu_id,
DEFAULT_GUEST_STACK_VADDR_MIN,
MEM_REGION_DATA);
+ stack_vaddr += DEFAULT_STACK_PGS * getpagesize();
+
+ /*
+ * Align stack to match calling sequence requirements in section "The
+ * Stack Frame" of the System V ABI AMD64 Architecture Processor
+ * Supplement, which requires the value (%rsp + 8) to be a multiple of
+ * 16 when control is transferred to the function entry point.
+ *
+ * If this code is ever used to launch a vCPU with 32-bit entry point it
+ * may need to subtract 4 bytes instead of 8 bytes.
+ */
+ TEST_ASSERT(IS_ALIGNED(stack_vaddr, PAGE_SIZE),
+ "__vm_vaddr_alloc() did not provide a page-aligned address");
+ stack_vaddr -= 8;
+
vcpu = __vm_vcpu_add(vm, vcpu_id);
vcpu_init_cpuid(vcpu, kvm_get_supported_cpuid());
vcpu_setup(vm, vcpu);
@@ -580,7 +596,7 @@ struct kvm_vcpu *vm_arch_vcpu_add(struct kvm_vm *vm, uint32_t vcpu_id,
/* Setup guest general purpose registers */
vcpu_regs_get(vcpu, &regs);
regs.rflags = regs.rflags | 0x2;
- regs.rsp = stack_vaddr + (DEFAULT_STACK_PGS * getpagesize());
+ regs.rsp = stack_vaddr;
regs.rip = (unsigned long) guest_code;
vcpu_regs_set(vcpu, &regs);
@@ -681,7 +697,7 @@ uint64_t kvm_get_feature_msr(uint64_t msr_index)
return buffer.entry.data;
}
-void __vm_xsave_require_permission(int bit, const char *name)
+void __vm_xsave_require_permission(uint64_t xfeature, const char *name)
{
int kvm_fd;
u64 bitmask;
@@ -689,12 +705,15 @@ void __vm_xsave_require_permission(int bit, const char *name)
struct kvm_device_attr attr = {
.group = 0,
.attr = KVM_X86_XCOMP_GUEST_SUPP,
- .addr = (unsigned long) &bitmask
+ .addr = (unsigned long) &bitmask,
};
TEST_ASSERT(!kvm_supported_cpuid,
"kvm_get_supported_cpuid() cannot be used before ARCH_REQ_XCOMP_GUEST_PERM");
+ TEST_ASSERT(is_power_of_2(xfeature),
+ "Dynamic XFeatures must be enabled one at a time");
+
kvm_fd = open_kvm_dev_path_or_exit();
rc = __kvm_ioctl(kvm_fd, KVM_GET_DEVICE_ATTR, &attr);
close(kvm_fd);
@@ -704,16 +723,16 @@ void __vm_xsave_require_permission(int bit, const char *name)
TEST_ASSERT(rc == 0, "KVM_GET_DEVICE_ATTR(0, KVM_X86_XCOMP_GUEST_SUPP) error: %ld", rc);
- __TEST_REQUIRE(bitmask & (1ULL << bit),
+ __TEST_REQUIRE(bitmask & xfeature,
"Required XSAVE feature '%s' not supported", name);
- TEST_REQUIRE(!syscall(SYS_arch_prctl, ARCH_REQ_XCOMP_GUEST_PERM, bit));
+ TEST_REQUIRE(!syscall(SYS_arch_prctl, ARCH_REQ_XCOMP_GUEST_PERM, ilog2(xfeature)));
rc = syscall(SYS_arch_prctl, ARCH_GET_XCOMP_GUEST_PERM, &bitmask);
TEST_ASSERT(rc == 0, "prctl(ARCH_GET_XCOMP_GUEST_PERM) error: %ld", rc);
- TEST_ASSERT(bitmask & (1ULL << bit),
- "prctl(ARCH_REQ_XCOMP_GUEST_PERM) failure bitmask=0x%lx",
- bitmask);
+ TEST_ASSERT(bitmask & xfeature,
+ "'%s' (0x%lx) not permitted after prctl(ARCH_REQ_XCOMP_GUEST_PERM) permitted=0x%lx",
+ name, xfeature, bitmask);
}
void vcpu_init_cpuid(struct kvm_vcpu *vcpu, const struct kvm_cpuid2 *cpuid)
@@ -954,6 +973,7 @@ struct kvm_x86_state *vcpu_save_state(struct kvm_vcpu *vcpu)
vcpu_run_complete_io(vcpu);
state = malloc(sizeof(*state) + msr_list->nmsrs * sizeof(state->msrs.entries[0]));
+ TEST_ASSERT(state, "-ENOMEM when allocating kvm state");
vcpu_events_get(vcpu, &state->events);
vcpu_mp_state_get(vcpu, &state->mp_state);
@@ -1139,21 +1159,36 @@ const struct kvm_cpuid_entry2 *get_cpuid_entry(const struct kvm_cpuid2 *cpuid,
return NULL;
}
+#define X86_HYPERCALL(inputs...) \
+({ \
+ uint64_t r; \
+ \
+ asm volatile("test %[use_vmmcall], %[use_vmmcall]\n\t" \
+ "jnz 1f\n\t" \
+ "vmcall\n\t" \
+ "jmp 2f\n\t" \
+ "1: vmmcall\n\t" \
+ "2:" \
+ : "=a"(r) \
+ : [use_vmmcall] "r" (host_cpu_is_amd), inputs); \
+ \
+ r; \
+})
+
uint64_t kvm_hypercall(uint64_t nr, uint64_t a0, uint64_t a1, uint64_t a2,
uint64_t a3)
{
- uint64_t r;
-
- asm volatile("test %[use_vmmcall], %[use_vmmcall]\n\t"
- "jnz 1f\n\t"
- "vmcall\n\t"
- "jmp 2f\n\t"
- "1: vmmcall\n\t"
- "2:"
- : "=a"(r)
- : "a"(nr), "b"(a0), "c"(a1), "d"(a2), "S"(a3),
- [use_vmmcall] "r" (host_cpu_is_amd));
- return r;
+ return X86_HYPERCALL("a"(nr), "b"(a0), "c"(a1), "d"(a2), "S"(a3));
+}
+
+uint64_t __xen_hypercall(uint64_t nr, uint64_t a0, void *a1)
+{
+ return X86_HYPERCALL("a"(nr), "D"(a0), "S"(a1));
+}
+
+void xen_hypercall(uint64_t nr, uint64_t a0, void *a1)
+{
+ GUEST_ASSERT(!__xen_hypercall(nr, a0, a1));
}
const struct kvm_cpuid2 *kvm_get_supported_hv_cpuid(void)
generated by cgit v1.2.3 (git 2.39.1) at 2025-08-14 20:15:56 +0000