From: Andrew Jones <ajones@xxxxxxxxxxxxxxxx>
Split the arch-neutral test code out of aarch64/get-reg-list.c into
get-reg-list.c. To do this we invent a new make variable
$(SPLIT_TESTS) which expects common parts to be in the KVM selftests
root and the counterparts to have the same name, but be in
$(ARCH_DIR).
There's still some work to be done to de-aarch64 the common
get-reg-list.c, but we leave that to the next patch to avoid
modifying too much code while moving it.
Signed-off-by: Andrew Jones <ajones@xxxxxxxxxxxxxxxx>
Signed-off-by: Haibo Xu <haibo1.xu@xxxxxxxxx>
---
tools/testing/selftests/kvm/Makefile | 12 +-
.../selftests/kvm/aarch64/get-reg-list.c | 367 +----------------
tools/testing/selftests/kvm/get-reg-list.c | 377 ++++++++++++++++++
3 files changed, 398 insertions(+), 358 deletions(-)
create mode 100644 tools/testing/selftests/kvm/get-reg-list.c
diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile
index c692cc86e7da..95f180e711d5 100644
--- a/tools/testing/selftests/kvm/Makefile
+++ b/tools/testing/selftests/kvm/Makefile
@@ -140,7 +140,6 @@ TEST_GEN_PROGS_EXTENDED_x86_64 += x86_64/nx_huge_pages_test
TEST_GEN_PROGS_aarch64 += aarch64/aarch32_id_regs
TEST_GEN_PROGS_aarch64 += aarch64/arch_timer
TEST_GEN_PROGS_aarch64 += aarch64/debug-exceptions
-TEST_GEN_PROGS_aarch64 += aarch64/get-reg-list
TEST_GEN_PROGS_aarch64 += aarch64/hypercalls
TEST_GEN_PROGS_aarch64 += aarch64/page_fault_test
TEST_GEN_PROGS_aarch64 += aarch64/psci_test
@@ -152,6 +151,7 @@ TEST_GEN_PROGS_aarch64 += access_tracking_perf_test
TEST_GEN_PROGS_aarch64 += demand_paging_test
TEST_GEN_PROGS_aarch64 += dirty_log_test
TEST_GEN_PROGS_aarch64 += dirty_log_perf_test
+TEST_GEN_PROGS_aarch64 += get-reg-list
TEST_GEN_PROGS_aarch64 += kvm_create_max_vcpus
TEST_GEN_PROGS_aarch64 += kvm_page_table_test
TEST_GEN_PROGS_aarch64 += memslot_modification_stress_test
@@ -181,6 +181,8 @@ TEST_GEN_PROGS_riscv += kvm_page_table_test
TEST_GEN_PROGS_riscv += set_memory_region_test
TEST_GEN_PROGS_riscv += kvm_binary_stats_test
+SPLIT_TESTS += get-reg-list
+
TEST_PROGS += $(TEST_PROGS_$(ARCH_DIR))
TEST_GEN_PROGS += $(TEST_GEN_PROGS_$(ARCH_DIR))
TEST_GEN_PROGS_EXTENDED += $(TEST_GEN_PROGS_EXTENDED_$(ARCH_DIR))
@@ -228,11 +230,14 @@ LIBKVM_C_OBJ := $(patsubst %.c, $(OUTPUT)/%.o, $(LIBKVM_C))
LIBKVM_S_OBJ := $(patsubst %.S, $(OUTPUT)/%.o, $(LIBKVM_S))
LIBKVM_STRING_OBJ := $(patsubst %.c, $(OUTPUT)/%.o, $(LIBKVM_STRING))
LIBKVM_OBJS = $(LIBKVM_C_OBJ) $(LIBKVM_S_OBJ) $(LIBKVM_STRING_OBJ)
+SPLIT_TESTS_TARGETS := $(patsubst %, $(OUTPUT)/%, $(SPLIT_TESTS))
+SPLIT_TESTS_OBJS := $(patsubst %, $(ARCH_DIR)/%.o, $(SPLIT_TESTS))
TEST_GEN_OBJ = $(patsubst %, %.o, $(TEST_GEN_PROGS))
TEST_GEN_OBJ += $(patsubst %, %.o, $(TEST_GEN_PROGS_EXTENDED))
TEST_DEP_FILES = $(patsubst %.o, %.d, $(TEST_GEN_OBJ))
TEST_DEP_FILES += $(patsubst %.o, %.d, $(LIBKVM_OBJS))
+TEST_DEP_FILES += $(patsubst %.o, %.d, $(SPLIT_TESTS_OBJS))
-include $(TEST_DEP_FILES)
$(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED): %: %.o
@@ -240,7 +245,10 @@ $(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED): %: %.o
$(TEST_GEN_OBJ): $(OUTPUT)/%.o: %.c
$(CC) $(CFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -c $< -o $@
-EXTRA_CLEAN += $(LIBKVM_OBJS) $(TEST_DEP_FILES) $(TEST_GEN_OBJ) cscope.*
+$(SPLIT_TESTS_TARGETS): %: %.o $(SPLIT_TESTS_OBJS)
+ $(CC) $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) $(TARGET_ARCH) $^ $(LDLIBS) -o $@
+
+EXTRA_CLEAN += $(LIBKVM_OBJS) $(TEST_DEP_FILES) $(TEST_GEN_OBJ) $(SPLIT_TESTS_OBJS) cscope.*
x := $(shell mkdir -p $(sort $(dir $(LIBKVM_C_OBJ) $(LIBKVM_S_OBJ))))
$(LIBKVM_C_OBJ): $(OUTPUT)/%.o: %.c
diff --git a/tools/testing/selftests/kvm/aarch64/get-reg-list.c b/tools/testing/selftests/kvm/aarch64/get-reg-list.c
index 11630bbfb86b..f72f1a522ff4 100644
--- a/tools/testing/selftests/kvm/aarch64/get-reg-list.c
+++ b/tools/testing/selftests/kvm/aarch64/get-reg-list.c
@@ -4,37 +4,17 @@
*
* Copyright (C) 2020, Red Hat, Inc.
*
- * When attempting to migrate from a host with an older kernel to a host
- * with a newer kernel we allow the newer kernel on the destination to
- * list new registers with get-reg-list. We assume they'll be unused, at
- * least until the guest reboots, and so they're relatively harmless.
- * However, if the destination host with the newer kernel is missing
- * registers which the source host with the older kernel has, then that's
- * a regression in get-reg-list. This test checks for that regression by
- * checking the current list against a blessed list. We should never have
- * missing registers, but if new ones appear then they can probably be
- * added to the blessed list. A completely new blessed list can be created
- * by running the test with the --list command line argument.
- *
- * Note, the blessed list should be created from the oldest possible
- * kernel. We can't go older than v5.2, though, because that's the first
+ * While the blessed list should be created from the oldest possible
+ * kernel, we can't go older than v5.2, though, because that's the first
* release which includes df205b5c6328 ("KVM: arm64: Filter out invalid
* core register IDs in KVM_GET_REG_LIST"). Without that commit the core
* registers won't match expectations.
*/
#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <sys/types.h>
-#include <sys/wait.h>
#include "kvm_util.h"
#include "test_util.h"
#include "processor.h"
-static struct kvm_reg_list *reg_list;
-static __u64 *blessed_reg, blessed_n;
-
struct feature_id_reg {
__u64 reg;
__u64 id_reg;
@@ -63,55 +43,7 @@ static struct feature_id_reg feat_id_regs[] = {
}
};
-static struct vcpu_reg_list *vcpu_configs[];
-static int vcpu_configs_n;
-
-#define for_each_sublist(c, s) \
- for ((s) = &(c)->sublists[0]; (s)->regs; ++(s))
-
-#define for_each_reg(i) \
- for ((i) = 0; (i) < reg_list->n; ++(i))
-
-#define for_each_reg_filtered(i) \
- for_each_reg(i) \
- if (!filter_reg(reg_list->reg[i]))
-
-#define for_each_missing_reg(i) \
- for ((i) = 0; (i) < blessed_n; ++(i)) \
- if (!find_reg(reg_list->reg, reg_list->n, blessed_reg[i])) \
- if (check_supported_feat_reg(vcpu, blessed_reg[i]))
-
-#define for_each_new_reg(i) \
- for_each_reg_filtered(i) \
- if (!find_reg(blessed_reg, blessed_n, reg_list->reg[i]))
-
-static const char *config_name(struct vcpu_reg_list *c)
-{
- struct vcpu_reg_sublist *s;
- int len = 0;
-
- if (c->name)
- return c->name;
-
- for_each_sublist(c, s)
- len += strlen(s->name) + 1;
-
- c->name = malloc(len);
-
- len = 0;
- for_each_sublist(c, s) {
- if (!strcmp(s->name, "base"))
- continue;
- strcat(c->name + len, s->name);
- len += strlen(s->name) + 1;
- c->name[len - 1] = '+';
- }
- c->name[len - 1] = '\0';
-
- return c->name;
-}
-
-static bool filter_reg(__u64 reg)
+bool filter_reg(__u64 reg)
{
/*
* DEMUX register presence depends on the host's CLIDR_EL1.
@@ -123,16 +55,6 @@ static bool filter_reg(__u64 reg)
return false;
}
-static bool find_reg(__u64 regs[], __u64 nr_regs, __u64 reg)
-{
- int i;
-
- for (i = 0; i < nr_regs; ++i)
- if (reg == regs[i])
- return true;
- return false;
-}
-
static bool check_supported_feat_reg(struct kvm_vcpu *vcpu, __u64 reg)
{
int i, ret;
@@ -152,6 +74,11 @@ static bool check_supported_feat_reg(struct kvm_vcpu *vcpu, __u64 reg)
return true;
}
+bool check_supported_reg(struct kvm_vcpu *vcpu, __u64 reg)
+{
+ return check_supported_feat_reg(vcpu, reg);
+}
+
#define REG_MASK (KVM_REG_ARCH_MASK | KVM_REG_SIZE_MASK | KVM_REG_ARM_COPROC_MASK)
#define CORE_REGS_XX_NR_WORDS 2
@@ -235,7 +162,7 @@ static const char *sve_id_to_str(const char *prefix, __u64 id)
return NULL;
}
-static void print_reg(const char *prefix, __u64 id)
+void print_reg(const char *prefix, __u64 id)
{
unsigned op0, op1, crn, crm, op2;
const char *reg_size = NULL;
@@ -315,278 +242,6 @@ static void print_reg(const char *prefix, __u64 id)
}
}
-static void prepare_vcpu_init(struct vcpu_reg_list *c, struct kvm_vcpu_init *init)
-{
- struct vcpu_reg_sublist *s;
-
- for_each_sublist(c, s)
- if (s->capability)
- init->features[s->feature / 32] |= 1 << (s->feature % 32);
-}
-
-static void finalize_vcpu(struct kvm_vcpu *vcpu, struct vcpu_reg_list *c)
-{
- struct vcpu_reg_sublist *s;
- int feature;
-
- for_each_sublist(c, s) {
- if (s->finalize) {
- feature = s->feature;
- vcpu_ioctl(vcpu, KVM_ARM_VCPU_FINALIZE, &feature);
- }
- }
-}
-
-static void check_supported(struct vcpu_reg_list *c)
-{
- struct vcpu_reg_sublist *s;
-
- for_each_sublist(c, s) {
- if (!s->capability)
- continue;
-
- __TEST_REQUIRE(kvm_has_cap(s->capability),
- "%s: %s not available, skipping tests\n",
- config_name(c), s->name);
- }
-}
-
-static bool print_list;
-static bool print_filtered;
-
-static void run_test(struct vcpu_reg_list *c)
-{
- struct kvm_vcpu_init init = { .target = -1, };
- int new_regs = 0, missing_regs = 0, i, n;
- int failed_get = 0, failed_set = 0, failed_reject = 0;
- struct kvm_vcpu *vcpu;
- struct kvm_vm *vm;
- struct vcpu_reg_sublist *s;
-
- check_supported(c);
-
- vm = vm_create_barebones();
- prepare_vcpu_init(c, &init);
- vcpu = __vm_vcpu_add(vm, 0);
- aarch64_vcpu_setup(vcpu, &init);
- finalize_vcpu(vcpu, c);
-
- reg_list = vcpu_get_reg_list(vcpu);
-
- if (print_list || print_filtered) {
- putchar('\n');
- for_each_reg(i) {
- __u64 id = reg_list->reg[i];
- if ((print_list && !filter_reg(id)) ||
- (print_filtered && filter_reg(id)))
- print_reg(config_name(c), id);
- }
- putchar('\n');
- return;
- }
-
- /*
- * We only test that we can get the register and then write back the
- * same value. Some registers may allow other values to be written
- * back, but others only allow some bits to be changed, and at least
- * for ID registers set will fail if the value does not exactly match
- * what was returned by get. If registers that allow other values to
- * be written need to have the other values tested, then we should
- * create a new set of tests for those in a new independent test
- * executable.
- */
- for_each_reg(i) {
- uint8_t addr[2048 / 8];
- struct kvm_one_reg reg = {
- .id = reg_list->reg[i],
- .addr = (__u64)&addr,
- };
- bool reject_reg = false;
- int ret;
-
- ret = __vcpu_get_reg(vcpu, reg_list->reg[i], &addr);
- if (ret) {
- printf("%s: Failed to get ", config_name(c));
- print_reg(config_name(c), reg.id);
- putchar('\n');
- ++failed_get;
- }
-
- /* rejects_set registers are rejected after KVM_ARM_VCPU_FINALIZE */
- for_each_sublist(c, s) {
- if (s->rejects_set && find_reg(s->rejects_set, s->rejects_set_n, reg.id)) {
- reject_reg = true;
- ret = __vcpu_ioctl(vcpu, KVM_SET_ONE_REG, ®);
- if (ret != -1 || errno != EPERM) {
- printf("%s: Failed to reject (ret=%d, errno=%d) ", config_name(c), ret, errno);
- print_reg(config_name(c), reg.id);
- putchar('\n');
- ++failed_reject;
- }
- break;
- }
- }
-
- if (!reject_reg) {
- ret = __vcpu_ioctl(vcpu, KVM_SET_ONE_REG, ®);
- if (ret) {
- printf("%s: Failed to set ", config_name(c));
- print_reg(config_name(c), reg.id);
- putchar('\n');
- ++failed_set;
- }
- }
- }
-
- for_each_sublist(c, s)
- blessed_n += s->regs_n;
- blessed_reg = calloc(blessed_n, sizeof(__u64));
-
- n = 0;
- for_each_sublist(c, s) {
- for (i = 0; i < s->regs_n; ++i)
- blessed_reg[n++] = s->regs[i];
- }
-
- for_each_new_reg(i)
- ++new_regs;
-
- for_each_missing_reg(i)
- ++missing_regs;
-
- if (new_regs || missing_regs) {
- n = 0;
- for_each_reg_filtered(i)
- ++n;
-
- printf("%s: Number blessed registers: %5lld\n", config_name(c), blessed_n);
- printf("%s: Number registers: %5lld (includes %lld filtered registers)\n",
- config_name(c), reg_list->n, reg_list->n - n);
- }
-
- if (new_regs) {
- printf("\n%s: There are %d new registers.\n"
- "Consider adding them to the blessed reg "
- "list with the following lines:\n\n", config_name(c), new_regs);
- for_each_new_reg(i)
- print_reg(config_name(c), reg_list->reg[i]);
- putchar('\n');
- }
-
- if (missing_regs) {
- printf("\n%s: There are %d missing registers.\n"
- "The following lines are missing registers:\n\n", config_name(c), missing_regs);
- for_each_missing_reg(i)
- print_reg(config_name(c), blessed_reg[i]);
- putchar('\n');
- }
-
- TEST_ASSERT(!missing_regs && !failed_get && !failed_set && !failed_reject,
- "%s: There are %d missing registers; "
- "%d registers failed get; %d registers failed set; %d registers failed reject",
- config_name(c), missing_regs, failed_get, failed_set, failed_reject);
-
- pr_info("%s: PASS\n", config_name(c));
- blessed_n = 0;
- free(blessed_reg);
- free(reg_list);
- kvm_vm_free(vm);
-}
-
-static void help(void)
-{
- struct vcpu_reg_list *c;
- int i;
-
- printf(
- "\n"
- "usage: get-reg-list [--config=<selection>] [--list] [--list-filtered]\n\n"
- " --config=<selection> Used to select a specific vcpu configuration for the test/listing\n"
- " '<selection>' may be\n");
-
- for (i = 0; i < vcpu_configs_n; ++i) {
- c = vcpu_configs[i];
- printf(
- " '%s'\n", config_name(c));
- }
-
- printf(
- "\n"
- " --list Print the register list rather than test it (requires --config)\n"
- " --list-filtered Print registers that would normally be filtered out (requires --config)\n"
- "\n"
- );
-}
-
-static struct vcpu_reg_list *parse_config(const char *config)
-{
- struct vcpu_reg_list *c;
- int i;
-
- if (config[8] != '=')
- help(), exit(1);
-
- for (i = 0; i < vcpu_configs_n; ++i) {
- c = vcpu_configs[i];
- if (strcmp(config_name(c), &config[9]) == 0)
- break;
- }
-
- if (i == vcpu_configs_n)
- help(), exit(1);
-
- return c;
-}
-
-int main(int ac, char **av)
-{
- struct vcpu_reg_list *c, *sel = NULL;
- int i, ret = 0;
- pid_t pid;
-
- for (i = 1; i < ac; ++i) {
- if (strncmp(av[i], "--config", 8) == 0)
- sel = parse_config(av[i]);
- else if (strcmp(av[i], "--list") == 0)
- print_list = true;
- else if (strcmp(av[i], "--list-filtered") == 0)
- print_filtered = true;
- else if (strcmp(av[i], "--help") == 0 || strcmp(av[1], "-h") == 0)
- help(), exit(0);
- else
- help(), exit(1);
- }
-
- if (print_list || print_filtered) {
- /*
- * We only want to print the register list of a single config.
- */
- if (!sel)
- help(), exit(1);
- }
-
- for (i = 0; i < vcpu_configs_n; ++i) {
- c = vcpu_configs[i];
- if (sel && c != sel)
- continue;
-
- pid = fork();
-
- if (!pid) {
- run_test(c);
- exit(0);
- } else {
- int wstatus;
- pid_t wpid = wait(&wstatus);
- TEST_ASSERT(wpid == pid && WIFEXITED(wstatus), "wait: Unexpected return");
- if (WEXITSTATUS(wstatus) && WEXITSTATUS(wstatus) != KSFT_SKIP)
- ret = KSFT_FAIL;
- }
- }
-
- return ret;
-}
-
/*
* The original blessed list was primed with the output of kernel version
* v4.15 with --core-reg-fixup and then later updated with new registers.
@@ -1073,7 +728,7 @@ static struct vcpu_reg_list pauth_pmu_config = {
},
};
-static struct vcpu_reg_list *vcpu_configs[] = {
+struct vcpu_reg_list *vcpu_configs[] = {
&vregs_config,
&vregs_pmu_config,
&sve_config,
@@ -1081,4 +736,4 @@ static struct vcpu_reg_list *vcpu_configs[] = {
&pauth_config,
&pauth_pmu_config,
};
-static int vcpu_configs_n = ARRAY_SIZE(vcpu_configs);
+int vcpu_configs_n = ARRAY_SIZE(vcpu_configs);
diff --git a/tools/testing/selftests/kvm/get-reg-list.c b/tools/testing/selftests/kvm/get-reg-list.c
new file mode 100644
index 000000000000..a29e548643d1
--- /dev/null
+++ b/tools/testing/selftests/kvm/get-reg-list.c
@@ -0,0 +1,377 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Check for KVM_GET_REG_LIST regressions.
+ *
+ * Copyright (C) 2020, Red Hat, Inc.
+ *
+ * When attempting to migrate from a host with an older kernel to a host
+ * with a newer kernel we allow the newer kernel on the destination to
+ * list new registers with get-reg-list. We assume they'll be unused, at
+ * least until the guest reboots, and so they're relatively harmless.
+ * However, if the destination host with the newer kernel is missing
+ * registers which the source host with the older kernel has, then that's
+ * a regression in get-reg-list. This test checks for that regression by
+ * checking the current list against a blessed list. We should never have
+ * missing registers, but if new ones appear then they can probably be
+ * added to the blessed list. A completely new blessed list can be created
+ * by running the test with the --list command line argument.
+ *
+ * The blessed list should be created from the oldest possible kernel.
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include "kvm_util.h"
+#include "test_util.h"
+#include "processor.h"
+
+static struct kvm_reg_list *reg_list;
+static __u64 *blessed_reg, blessed_n;
+
+extern struct vcpu_reg_list *vcpu_configs[];
+extern int vcpu_configs_n;
+
+#define for_each_sublist(c, s) \
+ for ((s) = &(c)->sublists[0]; (s)->regs; ++(s))
+
+#define for_each_reg(i) \
+ for ((i) = 0; (i) < reg_list->n; ++(i))
+
+#define for_each_reg_filtered(i) \
+ for_each_reg(i) \
+ if (!filter_reg(reg_list->reg[i]))
+
+#define for_each_missing_reg(i) \
+ for ((i) = 0; (i) < blessed_n; ++(i)) \
+ if (!find_reg(reg_list->reg, reg_list->n, blessed_reg[i])) \
+ if (check_supported_reg(vcpu, blessed_reg[i]))
+
+#define for_each_new_reg(i) \
+ for_each_reg_filtered(i) \
+ if (!find_reg(blessed_reg, blessed_n, reg_list->reg[i]))
+
+static const char *config_name(struct vcpu_reg_list *c)
+{
+ struct vcpu_reg_sublist *s;
+ int len = 0;
+
+ if (c->name)
+ return c->name;
+
+ for_each_sublist(c, s)
+ len += strlen(s->name) + 1;
+
+ c->name = malloc(len);
+
+ len = 0;
+ for_each_sublist(c, s) {
+ if (!strcmp(s->name, "base"))
+ continue;
+ strcat(c->name + len, s->name);
+ len += strlen(s->name) + 1;
+ c->name[len - 1] = '+';
+ }
+ c->name[len - 1] = '\0';
+
+ return c->name;
+}
+
+bool __weak check_supported_reg(struct kvm_vcpu *vcpu, __u64 reg)
+{
+ return true;
+}
+
+bool __weak filter_reg(__u64 reg)
+{
+ return false;
+}
+
+static bool find_reg(__u64 regs[], __u64 nr_regs, __u64 reg)
+{
+ int i;
+
+ for (i = 0; i < nr_regs; ++i)
+ if (reg == regs[i])
+ return true;
+ return false;
+}
+
+void __weak print_reg(const char *prefix, __u64 id)
+{
+ printf("\t0x%llx,\n", id);
+}
+
+static void prepare_vcpu_init(struct vcpu_reg_list *c, struct kvm_vcpu_init *init)
+{
+ struct vcpu_reg_sublist *s;
+
+ for_each_sublist(c, s)
+ if (s->capability)
+ init->features[s->feature / 32] |= 1 << (s->feature % 32);
+}
+
+static void finalize_vcpu(struct kvm_vcpu *vcpu, struct vcpu_reg_list *c)
+{
+ struct vcpu_reg_sublist *s;
+ int feature;
+
+ for_each_sublist(c, s) {
+ if (s->finalize) {
+ feature = s->feature;
+ vcpu_ioctl(vcpu, KVM_ARM_VCPU_FINALIZE, &feature);
+ }
+ }
+}
+
+static void check_supported(struct vcpu_reg_list *c)
+{
+ struct vcpu_reg_sublist *s;
+
+ for_each_sublist(c, s) {
+ if (!s->capability)
+ continue;
+
+ __TEST_REQUIRE(kvm_has_cap(s->capability),
+ "%s: %s not available, skipping tests\n",
+ config_name(c), s->name);
+ }
+}
+
+static bool print_list;
+static bool print_filtered;
+
+static void run_test(struct vcpu_reg_list *c)
+{
+ struct kvm_vcpu_init init = { .target = -1, };
+ int new_regs = 0, missing_regs = 0, i, n;
+ int failed_get = 0, failed_set = 0, failed_reject = 0;
+ struct kvm_vcpu *vcpu;
+ struct kvm_vm *vm;
+ struct vcpu_reg_sublist *s;
+
+ check_supported(c);
+
+ vm = vm_create_barebones();
+ prepare_vcpu_init(c, &init);
+ vcpu = __vm_vcpu_add(vm, 0);
+ aarch64_vcpu_setup(vcpu, &init);
+ finalize_vcpu(vcpu, c);
+
+ reg_list = vcpu_get_reg_list(vcpu);
+
+ if (print_list || print_filtered) {
+ putchar('\n');
+ for_each_reg(i) {
+ __u64 id = reg_list->reg[i];
+ if ((print_list && !filter_reg(id)) ||
+ (print_filtered && filter_reg(id)))
+ print_reg(config_name(c), id);
+ }
+ putchar('\n');
+ return;
+ }
+
+ /*
+ * We only test that we can get the register and then write back the
+ * same value. Some registers may allow other values to be written
+ * back, but others only allow some bits to be changed, and at least
+ * for ID registers set will fail if the value does not exactly match
+ * what was returned by get. If registers that allow other values to
+ * be written need to have the other values tested, then we should
+ * create a new set of tests for those in a new independent test
+ * executable.
+ */
+ for_each_reg(i) {
+ uint8_t addr[2048 / 8];
+ struct kvm_one_reg reg = {
+ .id = reg_list->reg[i],
+ .addr = (__u64)&addr,
+ };
+ bool reject_reg = false;
+ int ret;
+
+ ret = __vcpu_get_reg(vcpu, reg_list->reg[i], &addr);
+ if (ret) {
+ printf("%s: Failed to get ", config_name(c));
+ print_reg(config_name(c), reg.id);
+ putchar('\n');
+ ++failed_get;
+ }
+
+ /* rejects_set registers are rejected after KVM_ARM_VCPU_FINALIZE */
+ for_each_sublist(c, s) {
+ if (s->rejects_set && find_reg(s->rejects_set, s->rejects_set_n, reg.id)) {
+ reject_reg = true;
+ ret = __vcpu_ioctl(vcpu, KVM_SET_ONE_REG, ®);
+ if (ret != -1 || errno != EPERM) {
+ printf("%s: Failed to reject (ret=%d, errno=%d) ", config_name(c), ret, errno);
+ print_reg(config_name(c), reg.id);
+ putchar('\n');
+ ++failed_reject;
+ }
+ break;
+ }
+ }
+
+ if (!reject_reg) {
+ ret = __vcpu_ioctl(vcpu, KVM_SET_ONE_REG, ®);
+ if (ret) {
+ printf("%s: Failed to set ", config_name(c));
+ print_reg(config_name(c), reg.id);
+ putchar('\n');
+ ++failed_set;
+ }
+ }
+ }
+
+ for_each_sublist(c, s)
+ blessed_n += s->regs_n;
+ blessed_reg = calloc(blessed_n, sizeof(__u64));
+
+ n = 0;
+ for_each_sublist(c, s) {
+ for (i = 0; i < s->regs_n; ++i)
+ blessed_reg[n++] = s->regs[i];
+ }
+
+ for_each_new_reg(i)
+ ++new_regs;
+
+ for_each_missing_reg(i)
+ ++missing_regs;
+
+ if (new_regs || missing_regs) {
+ n = 0;
+ for_each_reg_filtered(i)
+ ++n;
+
+ printf("%s: Number blessed registers: %5lld\n", config_name(c), blessed_n);
+ printf("%s: Number registers: %5lld (includes %lld filtered registers)\n",
+ config_name(c), reg_list->n, reg_list->n - n);
+ }
+
+ if (new_regs) {
+ printf("\n%s: There are %d new registers.\n"
+ "Consider adding them to the blessed reg "
+ "list with the following lines:\n\n", config_name(c), new_regs);
+ for_each_new_reg(i)
+ print_reg(config_name(c), reg_list->reg[i]);
+ putchar('\n');
+ }
+
+ if (missing_regs) {
+ printf("\n%s: There are %d missing registers.\n"
+ "The following lines are missing registers:\n\n", config_name(c), missing_regs);
+ for_each_missing_reg(i)
+ print_reg(config_name(c), blessed_reg[i]);
+ putchar('\n');
+ }
+
+ TEST_ASSERT(!missing_regs && !failed_get && !failed_set && !failed_reject,
+ "%s: There are %d missing registers; "
+ "%d registers failed get; %d registers failed set; %d registers failed reject",
+ config_name(c), missing_regs, failed_get, failed_set, failed_reject);
+
+ pr_info("%s: PASS\n", config_name(c));
+ blessed_n = 0;
+ free(blessed_reg);
+ free(reg_list);
+ kvm_vm_free(vm);
+}
+
+static void help(void)
+{
+ struct vcpu_reg_list *c;
+ int i;
+
+ printf(
+ "\n"
+ "usage: get-reg-list [--config=<selection>] [--list] [--list-filtered]\n\n"
+ " --config=<selection> Used to select a specific vcpu configuration for the test/listing\n"
+ " '<selection>' may be\n");
+
+ for (i = 0; i < vcpu_configs_n; ++i) {
+ c = vcpu_configs[i];
+ printf(
+ " '%s'\n", config_name(c));
+ }
+
+ printf(
+ "\n"
+ " --list Print the register list rather than test it (requires --config)\n"
+ " --list-filtered Print registers that would normally be filtered out (requires --config)\n"
+ "\n"
+ );
+}
+
+static struct vcpu_reg_list *parse_config(const char *config)
+{
+ struct vcpu_reg_list *c = NULL;
+ int i;
+
+ if (config[8] != '=')
+ help(), exit(1);
+
+ for (i = 0; i < vcpu_configs_n; ++i) {
+ c = vcpu_configs[i];
+ if (strcmp(config_name(c), &config[9]) == 0)
+ break;
+ }
+
+ if (i == vcpu_configs_n)
+ help(), exit(1);
+
+ return c;
+}
+
+int main(int ac, char **av)
+{
+ struct vcpu_reg_list *c, *sel = NULL;
+ int i, ret = 0;
+ pid_t pid;
+
+ for (i = 1; i < ac; ++i) {
+ if (strncmp(av[i], "--config", 8) == 0)
+ sel = parse_config(av[i]);
+ else if (strcmp(av[i], "--list") == 0)
+ print_list = true;
+ else if (strcmp(av[i], "--list-filtered") == 0)
+ print_filtered = true;
+ else if (strcmp(av[i], "--help") == 0 || strcmp(av[1], "-h") == 0)
+ help(), exit(0);
+ else
+ help(), exit(1);
+ }
+
+ if (print_list || print_filtered) {
+ /*
+ * We only want to print the register list of a single config.
+ */
+ if (!sel)
+ help(), exit(1);
+ }
+
+ for (i = 0; i < vcpu_configs_n; ++i) {
+ c = vcpu_configs[i];
+ if (sel && c != sel)
+ continue;
+
+ pid = fork();
+
+ if (!pid) {
+ run_test(c);
+ exit(0);
+ } else {
+ int wstatus;
+ pid_t wpid = wait(&wstatus);
+ TEST_ASSERT(wpid == pid && WIFEXITED(wstatus), "wait: Unexpected return");
+ if (WEXITSTATUS(wstatus) && WEXITSTATUS(wstatus) != KSFT_SKIP)
+ ret = KSFT_FAIL;
+ }
+ }
+
+ return ret;
+}
--
2.34.1
