@@ -17,7 +17,7 @@ tests += $(TEST_DIR)/sieve.$(exe)
all: $(tests)
-$(TEST_DIR)/sbi-deps = $(TEST_DIR)/sbi-asm.o
+$(TEST_DIR)/sbi-deps = $(TEST_DIR)/sbi-asm.o $(TEST_DIR)/sbi-sse.o
# When built for EFI sieve needs extra memory, run with e.g. '-m 256' on QEMU
$(TEST_DIR)/sieve.$(exe): AUXFLAGS = 0x1
@@ -21,6 +21,8 @@
/* Exception cause high bit - is an interrupt if set */
#define CAUSE_IRQ_FLAG (_AC(1, UL) << (__riscv_xlen - 1))
+#define SSTATUS_SPP _AC(0x00000100, UL) /* Previously Supervisor */
+
/* Exception causes */
#define EXC_INST_MISALIGNED 0
#define EXC_INST_ACCESS 1
new file mode 100644
@@ -0,0 +1,1043 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * SBI SSE testsuite
+ *
+ * Copyright (C) 2024, Rivos Inc., Clément Léger <cleger@rivosinc.com>
+ */
+#include <alloc.h>
+#include <alloc_page.h>
+#include <bitops.h>
+#include <cpumask.h>
+#include <libcflat.h>
+#include <on-cpus.h>
+
+#include <asm/barrier.h>
+#include <asm/page.h>
+#include <asm/processor.h>
+#include <asm/sbi.h>
+#include <asm/setup.h>
+#include <asm/sse.h>
+
+#include "sbi-tests.h"
+
+#define SSE_STACK_SIZE PAGE_SIZE
+
+void check_sse(void);
+
+struct sse_event_info {
+ unsigned long event_id;
+ const char *name;
+ bool can_inject;
+};
+
+static struct sse_event_info sse_event_infos[] = {
+ {
+ .event_id = SBI_SSE_EVENT_LOCAL_RAS,
+ .name = "local_ras",
+ },
+ {
+ .event_id = SBI_SSE_EVENT_LOCAL_DOUBLE_TRAP,
+ .name = "double_trap",
+ },
+ {
+ .event_id = SBI_SSE_EVENT_GLOBAL_RAS,
+ .name = "global_ras",
+ },
+ {
+ .event_id = SBI_SSE_EVENT_LOCAL_PMU,
+ .name = "local_pmu",
+ },
+ {
+ .event_id = SBI_SSE_EVENT_LOCAL_SOFTWARE,
+ .name = "local_software",
+ },
+ {
+ .event_id = SBI_SSE_EVENT_GLOBAL_SOFTWARE,
+ .name = "global_software",
+ },
+};
+
+static const char *const attr_names[] = {
+ [SBI_SSE_ATTR_STATUS] = "status",
+ [SBI_SSE_ATTR_PRIORITY] = "prio",
+ [SBI_SSE_ATTR_CONFIG] = "config",
+ [SBI_SSE_ATTR_PREFERRED_HART] = "preferred_hart",
+ [SBI_SSE_ATTR_ENTRY_PC] = "entry_pc",
+ [SBI_SSE_ATTR_ENTRY_ARG] = "entry_arg",
+ [SBI_SSE_ATTR_INTERRUPTED_SEPC] = "interrupted_pc",
+ [SBI_SSE_ATTR_INTERRUPTED_FLAGS] = "interrupted_flags",
+ [SBI_SSE_ATTR_INTERRUPTED_A6] = "interrupted_a6",
+ [SBI_SSE_ATTR_INTERRUPTED_A7] = "interrupted_a7",
+};
+
+static const unsigned long ro_attrs[] = {
+ SBI_SSE_ATTR_STATUS,
+ SBI_SSE_ATTR_ENTRY_PC,
+ SBI_SSE_ATTR_ENTRY_ARG,
+};
+
+static const unsigned long interrupted_attrs[] = {
+ SBI_SSE_ATTR_INTERRUPTED_FLAGS,
+ SBI_SSE_ATTR_INTERRUPTED_SEPC,
+ SBI_SSE_ATTR_INTERRUPTED_A6,
+ SBI_SSE_ATTR_INTERRUPTED_A7,
+};
+
+static const unsigned long interrupted_flags[] = {
+ SBI_SSE_ATTR_INTERRUPTED_FLAGS_SSTATUS_SPP,
+ SBI_SSE_ATTR_INTERRUPTED_FLAGS_SSTATUS_SPIE,
+ SBI_SSE_ATTR_INTERRUPTED_FLAGS_HSTATUS_SPV,
+ SBI_SSE_ATTR_INTERRUPTED_FLAGS_HSTATUS_SPVP,
+};
+
+static struct sse_event_info *sse_evt_get_infos(unsigned long event_id)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(sse_event_infos); i++) {
+ if (sse_event_infos[i].event_id == event_id)
+ return &sse_event_infos[i];
+ }
+
+ assert_msg(false, "Invalid event id: %ld", event_id);
+}
+
+static const char *sse_evt_name(unsigned long event_id)
+{
+ struct sse_event_info *infos = sse_evt_get_infos(event_id);
+
+ return infos->name;
+}
+
+static bool sse_evt_can_inject(unsigned long event_id)
+{
+ struct sse_event_info *infos = sse_evt_get_infos(event_id);
+
+ return infos->can_inject;
+}
+
+static bool sse_event_is_global(unsigned long event_id)
+{
+ return !!(event_id & SBI_SSE_EVENT_GLOBAL_BIT);
+}
+
+static struct sbiret sse_event_get_attr_raw(unsigned long event_id,
+ unsigned long base_attr_id,
+ unsigned long attr_count,
+ unsigned long phys_lo,
+ unsigned long phys_hi)
+{
+ return sbi_ecall(SBI_EXT_SSE, SBI_EXT_SSE_READ_ATTRS, event_id,
+ base_attr_id, attr_count, phys_lo, phys_hi, 0);
+}
+
+static unsigned long sse_event_get_attrs(unsigned long event_id, unsigned long attr_id,
+ unsigned long *values, unsigned int attr_count)
+{
+ struct sbiret ret;
+
+ ret = sse_event_get_attr_raw(event_id, attr_id, attr_count, (unsigned long)values, 0);
+
+ return ret.error;
+}
+
+static unsigned long sse_event_get_attr(unsigned long event_id, unsigned long attr_id,
+ unsigned long *value)
+{
+ return sse_event_get_attrs(event_id, attr_id, value, 1);
+}
+
+static struct sbiret sse_event_set_attr_raw(unsigned long event_id, unsigned long base_attr_id,
+ unsigned long attr_count, unsigned long phys_lo,
+ unsigned long phys_hi)
+{
+ return sbi_ecall(SBI_EXT_SSE, SBI_EXT_SSE_WRITE_ATTRS, event_id, base_attr_id, attr_count,
+ phys_lo, phys_hi, 0);
+}
+
+static unsigned long sse_event_set_attr(unsigned long event_id, unsigned long attr_id,
+ unsigned long value)
+{
+ struct sbiret ret;
+
+ ret = sse_event_set_attr_raw(event_id, attr_id, 1, (unsigned long)&value, 0);
+
+ return ret.error;
+}
+
+static unsigned long sse_event_register_raw(unsigned long event_id, void *entry_pc, void *entry_arg)
+{
+ struct sbiret ret;
+
+ ret = sbi_ecall(SBI_EXT_SSE, SBI_EXT_SSE_REGISTER, event_id, (unsigned long)entry_pc,
+ (unsigned long)entry_arg, 0, 0, 0);
+
+ return ret.error;
+}
+
+static unsigned long sse_event_register(unsigned long event_id, struct sse_handler_arg *arg)
+{
+ struct sbiret ret;
+
+ ret = sbi_ecall(SBI_EXT_SSE, SBI_EXT_SSE_REGISTER, event_id, (unsigned long)sse_entry,
+ (unsigned long)arg, 0, 0, 0);
+
+ return ret.error;
+}
+
+static unsigned long sse_event_unregister(unsigned long event_id)
+{
+ struct sbiret ret;
+
+ ret = sbi_ecall(SBI_EXT_SSE, SBI_EXT_SSE_UNREGISTER, event_id, 0, 0, 0, 0, 0);
+
+ return ret.error;
+}
+
+static unsigned long sse_event_enable(unsigned long event_id)
+{
+ struct sbiret ret;
+
+ ret = sbi_ecall(SBI_EXT_SSE, SBI_EXT_SSE_ENABLE, event_id, 0, 0, 0, 0, 0);
+
+ return ret.error;
+}
+
+static unsigned long sse_hart_mask(void)
+{
+ struct sbiret ret;
+
+ ret = sbi_ecall(SBI_EXT_SSE, SBI_EXT_SSE_HART_MASK, 0, 0, 0, 0, 0, 0);
+
+ return ret.error;
+}
+
+static unsigned long sse_hart_unmask(void)
+{
+ struct sbiret ret;
+
+ ret = sbi_ecall(SBI_EXT_SSE, SBI_EXT_SSE_HART_UNMASK, 0, 0, 0, 0, 0, 0);
+
+ return ret.error;
+}
+
+static unsigned long sse_event_inject(unsigned long event_id, unsigned long hart_id)
+{
+ struct sbiret ret;
+
+ ret = sbi_ecall(SBI_EXT_SSE, SBI_EXT_SSE_INJECT, event_id, hart_id, 0, 0, 0, 0);
+
+ return ret.error;
+}
+
+static unsigned long sse_event_disable(unsigned long event_id)
+{
+ struct sbiret ret;
+
+ ret = sbi_ecall(SBI_EXT_SSE, SBI_EXT_SSE_DISABLE, event_id, 0, 0, 0, 0, 0);
+
+ return ret.error;
+}
+
+
+static int sse_get_state(unsigned long event_id, enum sbi_sse_state *state)
+{
+ int ret;
+ unsigned long status;
+
+ ret = sse_event_get_attr(event_id, SBI_SSE_ATTR_STATUS, &status);
+ if (ret) {
+ report_fail("Failed to get SSE event status");
+ return -1;
+ }
+
+ *state = status & SBI_SSE_ATTR_STATUS_STATE_MASK;
+
+ return 0;
+}
+
+static void sse_global_event_set_current_hart(unsigned long event_id)
+{
+ int ret;
+
+ if (!sse_event_is_global(event_id))
+ return;
+
+ ret = sse_event_set_attr(event_id, SBI_SSE_ATTR_PREFERRED_HART,
+ current_thread_info()->hartid);
+ if (ret)
+ report_abort("set preferred hart failure");
+}
+
+static int sse_check_state(unsigned long event_id, unsigned long expected_state)
+{
+ int ret;
+ enum sbi_sse_state state;
+
+ ret = sse_get_state(event_id, &state);
+ if (ret)
+ return 1;
+ report(state == expected_state, "SSE event status == %ld", expected_state);
+
+ return state != expected_state;
+}
+
+static bool sse_event_pending(unsigned long event_id)
+{
+ int ret;
+ unsigned long status;
+
+ ret = sse_event_get_attr(event_id, SBI_SSE_ATTR_STATUS, &status);
+ if (ret) {
+ report_fail("Failed to get SSE event status");
+ return false;
+ }
+
+ return !!(status & BIT(SBI_SSE_ATTR_STATUS_PENDING_OFFSET));
+}
+
+static void *sse_alloc_stack(void)
+{
+ return (alloc_page() + SSE_STACK_SIZE);
+}
+
+static void sse_free_stack(void *stack)
+{
+ free_page(stack - SSE_STACK_SIZE);
+}
+
+static void sse_test_attr(unsigned long event_id)
+{
+ unsigned long ret, value = 0;
+ unsigned long values[ARRAY_SIZE(ro_attrs)];
+ struct sbiret sret;
+ unsigned int i;
+
+ report_prefix_push("attrs");
+
+ for (i = 0; i < ARRAY_SIZE(ro_attrs); i++) {
+ ret = sse_event_set_attr(event_id, ro_attrs[i], value);
+ report(ret == SBI_ERR_BAD_RANGE, "RO attribute %s not writable",
+ attr_names[ro_attrs[i]]);
+ }
+
+ for (i = SBI_SSE_ATTR_STATUS; i <= SBI_SSE_ATTR_INTERRUPTED_A7; i++) {
+ ret = sse_event_get_attr(event_id, i, &value);
+ report(ret == SBI_SUCCESS, "Read single attribute %s", attr_names[i]);
+ /* Preferred Hart reset value is defined by SBI vendor and status injectable bit
+ * also depends on the SBI implementation
+ */
+ if (i != SBI_SSE_ATTR_STATUS && i != SBI_SSE_ATTR_PREFERRED_HART)
+ report(value == 0, "Attribute %s reset value is 0", attr_names[i]);
+ }
+
+ ret = sse_event_get_attrs(event_id, SBI_SSE_ATTR_STATUS, values,
+ SBI_SSE_ATTR_INTERRUPTED_A7 - SBI_SSE_ATTR_STATUS);
+ report(ret == SBI_SUCCESS, "Read multiple attributes");
+
+#if __riscv_xlen > 32
+ ret = sse_event_set_attr(event_id, SBI_SSE_ATTR_PRIORITY, 0xFFFFFFFFUL + 1UL);
+ report(ret == SBI_ERR_INVALID_PARAM, "Write prio > 0xFFFFFFFF error");
+#endif
+
+ ret = sse_event_set_attr(event_id, SBI_SSE_ATTR_CONFIG, ~SBI_SSE_ATTR_CONFIG_ONESHOT);
+ report(ret == SBI_ERR_INVALID_PARAM, "Write invalid config error");
+
+ if (sse_event_is_global(event_id)) {
+ ret = sse_event_set_attr(event_id, SBI_SSE_ATTR_PREFERRED_HART, 0xFFFFFFFFUL);
+ report(ret == SBI_ERR_INVALID_PARAM, "Set invalid hart id error");
+ } else {
+ /* Set Hart on local event -> RO */
+ ret = sse_event_set_attr(event_id, SBI_SSE_ATTR_PREFERRED_HART,
+ current_thread_info()->hartid);
+ report(ret == SBI_ERR_BAD_RANGE, "Set hart id on local event error");
+ }
+
+ /* Set/get flags, sepc, a6, a7 */
+ for (i = 0; i < ARRAY_SIZE(interrupted_attrs); i++) {
+ ret = sse_event_get_attr(event_id, interrupted_attrs[i], &value);
+ report(ret == 0, "Get interrupted %s no error", attr_names[interrupted_attrs[i]]);
+
+ /* 0x1 is a valid value for all the interrupted attributes */
+ ret = sse_event_set_attr(event_id, SBI_SSE_ATTR_INTERRUPTED_FLAGS, 0x1);
+ report(ret == SBI_ERR_INVALID_STATE, "Set interrupted flags invalid state error");
+ }
+
+ /* Attr_count == 0 */
+ sret = sse_event_get_attr_raw(event_id, SBI_SSE_ATTR_STATUS, 0, (unsigned long) &value, 0);
+ report(sret.error == SBI_ERR_INVALID_PARAM, "Read attribute attr_count == 0 error");
+
+ sret = sse_event_set_attr_raw(event_id, SBI_SSE_ATTR_STATUS, 0, (unsigned long) &value, 0);
+ report(sret.error == SBI_ERR_INVALID_PARAM, "Write attribute attr_count == 0 error");
+
+ /* Invalid attribute id */
+ ret = sse_event_get_attr(event_id, SBI_SSE_ATTR_INTERRUPTED_A7 + 1, &value);
+ report(ret == SBI_ERR_BAD_RANGE, "Read invalid attribute error");
+ ret = sse_event_set_attr(event_id, SBI_SSE_ATTR_INTERRUPTED_A7 + 1, value);
+ report(ret == SBI_ERR_BAD_RANGE, "Write invalid attribute error");
+
+ /* Misaligned phys address */
+ sret = sse_event_get_attr_raw(event_id, SBI_SSE_ATTR_STATUS, 1,
+ ((unsigned long) &value | 0x1), 0);
+ report(sret.error == SBI_ERR_INVALID_ADDRESS, "Read attribute with invalid address error");
+ sret = sse_event_set_attr_raw(event_id, SBI_SSE_ATTR_STATUS, 1,
+ ((unsigned long) &value | 0x1), 0);
+ report(sret.error == SBI_ERR_INVALID_ADDRESS, "Write attribute with invalid address error");
+
+ report_prefix_pop();
+}
+
+static void sse_test_register_error(unsigned long event_id)
+{
+ unsigned long ret;
+
+ report_prefix_push("register");
+
+ ret = sse_event_unregister(event_id);
+ report(ret == SBI_ERR_INVALID_STATE, "SSE unregister non registered event");
+
+ ret = sse_event_register_raw(event_id, (void *) 0x1, NULL);
+ report(ret == SBI_ERR_INVALID_PARAM, "SSE register misaligned entry");
+
+ ret = sse_event_register_raw(event_id, (void *) sse_entry, NULL);
+ report(ret == SBI_SUCCESS, "SSE register ok");
+ if (ret)
+ goto done;
+
+ ret = sse_event_register_raw(event_id, (void *) sse_entry, NULL);
+ report(ret == SBI_ERR_INVALID_STATE, "SSE register twice failure");
+ if (!ret)
+ goto done;
+
+ ret = sse_event_unregister(event_id);
+ report(ret == SBI_SUCCESS, "SSE unregister ok");
+
+done:
+ report_prefix_pop();
+}
+
+struct sse_simple_test_arg {
+ bool done;
+ unsigned long expected_a6;
+ unsigned long event_id;
+};
+
+static void sse_simple_handler(void *data, struct pt_regs *regs, unsigned int hartid)
+{
+ volatile struct sse_simple_test_arg *arg = data;
+ int ret, i;
+ const char *attr_name;
+ unsigned long event_id = arg->event_id, value, prev_value, flags, attr;
+ const unsigned long regs_len = (SBI_SSE_ATTR_INTERRUPTED_A7 - SBI_SSE_ATTR_INTERRUPTED_A6) +
+ 1;
+ unsigned long interrupted_state[regs_len];
+
+ if ((regs->status & SSTATUS_SPP) == 0)
+ report_fail("Interrupted S-mode");
+
+ if (hartid != current_thread_info()->hartid)
+ report_fail("Hartid correctly passed");
+
+ sse_check_state(event_id, SBI_SSE_STATE_RUNNING);
+ if (sse_event_pending(event_id))
+ report_fail("Event is not pending");
+
+ /* Set a6, a7, sepc, flags while running */
+ for (i = 0; i < ARRAY_SIZE(interrupted_attrs); i++) {
+ attr = interrupted_attrs[i];
+ attr_name = attr_names[attr];
+
+ ret = sse_event_get_attr(event_id, attr, &prev_value);
+ report(ret == 0, "Get attr %s no error", attr_name);
+
+ /* We test SBI_SSE_ATTR_INTERRUPTED_FLAGS below with specific flag values */
+ if (attr == SBI_SSE_ATTR_INTERRUPTED_FLAGS)
+ continue;
+
+ ret = sse_event_set_attr(event_id, attr, 0xDEADBEEF + i);
+ report(ret == 0, "Set attr %s invalid state no error", attr_name);
+
+ ret = sse_event_get_attr(event_id, attr, &value);
+ report(ret == 0, "Get attr %s modified value no error", attr_name);
+ report(value == 0xDEADBEEF + i, "Get attr %s modified value ok", attr_name);
+
+ ret = sse_event_set_attr(event_id, attr, prev_value);
+ report(ret == 0, "Restore attr %s value no error", attr_name);
+ }
+
+ /* Test all flags allowed for SBI_SSE_ATTR_INTERRUPTED_FLAGS*/
+ attr = SBI_SSE_ATTR_INTERRUPTED_FLAGS;
+ attr_name = attr_names[attr];
+ ret = sse_event_get_attr(event_id, attr, &prev_value);
+ report(ret == 0, "Get attr %s no error", attr_name);
+
+ for (i = 0; i < ARRAY_SIZE(interrupted_flags); i++) {
+ flags = interrupted_flags[i];
+ ret = sse_event_set_attr(event_id, attr, flags);
+ report(ret == 0, "Set interrupted %s value no error", attr_name);
+ ret = sse_event_get_attr(event_id, attr, &value);
+ report(value == flags, "Get attr %s modified value ok", attr_name);
+ }
+
+ ret = sse_event_set_attr(event_id, attr, prev_value);
+ report(ret == 0, "Restore attr %s value no error", attr_name);
+
+ /* Try to change HARTID/Priority while running */
+ if (sse_event_is_global(event_id)) {
+ ret = sse_event_set_attr(event_id, SBI_SSE_ATTR_PREFERRED_HART,
+ current_thread_info()->hartid);
+ report(ret == SBI_ERR_INVALID_STATE, "Set hart id while running error");
+ }
+
+ ret = sse_event_set_attr(event_id, SBI_SSE_ATTR_PRIORITY, 0);
+ report(ret == SBI_ERR_INVALID_STATE, "Set priority while running error");
+
+ ret = sse_event_get_attrs(event_id, SBI_SSE_ATTR_INTERRUPTED_A6, interrupted_state,
+ regs_len);
+ report(ret == SBI_SUCCESS, "Read interrupted context from SSE handler ok");
+ if (interrupted_state[0] != arg->expected_a6)
+ report_fail("Interrupted state a6 check ok");
+ if (interrupted_state[1] != SBI_EXT_SSE)
+ report_fail("Interrupted state a7 check ok");
+
+ arg->done = true;
+}
+
+static void sse_test_inject_simple(unsigned long event_id)
+{
+ unsigned long ret;
+ struct sse_handler_arg args;
+ volatile struct sse_simple_test_arg test_arg = {.event_id = event_id, .done = 0};
+
+ args.handler = sse_simple_handler;
+ args.handler_data = (void *) &test_arg;
+ args.stack = sse_alloc_stack();
+
+ report_prefix_push("simple");
+
+ ret = sse_check_state(event_id, SBI_SSE_STATE_UNUSED);
+ if (ret)
+ goto done;
+
+ ret = sse_event_register(event_id, &args);
+ report(ret == SBI_SUCCESS, "SSE register no error");
+ if (ret)
+ goto done;
+
+ ret = sse_check_state(event_id, SBI_SSE_STATE_REGISTERED);
+ if (ret)
+ goto done;
+
+ /* Be sure global events are targeting the current hart */
+ sse_global_event_set_current_hart(event_id);
+
+ ret = sse_event_enable(event_id);
+ report(ret == SBI_SUCCESS, "SSE enable no error");
+ if (ret)
+ goto done;
+
+ ret = sse_check_state(event_id, SBI_SSE_STATE_ENABLED);
+ if (ret)
+ goto done;
+
+ ret = sse_hart_mask();
+ report(ret == SBI_SUCCESS, "SSE hart mask no error");
+
+ ret = sse_event_inject(event_id, current_thread_info()->hartid);
+ report(ret == SBI_SUCCESS, "SSE injection masked no error");
+ if (ret)
+ goto done;
+
+ barrier();
+ report(test_arg.done == 0, "SSE event masked not handled");
+
+ /*
+ * When unmasking the SSE events, we expect it to be injected
+ * immediately so a6 should be SBI_EXT_SSE_HART_UNMASK
+ */
+ test_arg.expected_a6 = SBI_EXT_SSE_HART_UNMASK;
+ ret = sse_hart_unmask();
+ report(ret == SBI_SUCCESS, "SSE hart unmask no error");
+
+ barrier();
+ report(test_arg.done == 1, "SSE event unmasked handled");
+ test_arg.done = 0;
+ test_arg.expected_a6 = SBI_EXT_SSE_INJECT;
+
+ /* Set as oneshot and verify it is disabled */
+ ret = sse_event_disable(event_id);
+ report(ret == 0, "Disable event ok");
+ ret = sse_event_set_attr(event_id, SBI_SSE_ATTR_CONFIG, SBI_SSE_ATTR_CONFIG_ONESHOT);
+ report(ret == 0, "Set event attribute as ONESHOT");
+ ret = sse_event_enable(event_id);
+ report(ret == 0, "Enable event ok");
+
+ ret = sse_event_inject(event_id, current_thread_info()->hartid);
+ report(ret == SBI_SUCCESS, "SSE injection 2 no error");
+ if (ret)
+ goto done;
+
+ barrier();
+ report(test_arg.done == 1, "SSE event handled ok");
+ test_arg.done = 0;
+
+ ret = sse_check_state(event_id, SBI_SSE_STATE_REGISTERED);
+ if (ret)
+ goto done;
+
+ /* Clear ONESHOT FLAG */
+ sse_event_set_attr(event_id, SBI_SSE_ATTR_CONFIG, 0);
+
+ ret = sse_event_unregister(event_id);
+ report(ret == SBI_SUCCESS, "SSE unregister no error");
+ if (ret)
+ goto done;
+
+ sse_check_state(event_id, SBI_SSE_STATE_UNUSED);
+
+done:
+ sse_free_stack(args.stack);
+ report_prefix_pop();
+}
+
+struct sse_foreign_cpu_test_arg {
+ bool done;
+ unsigned int expected_cpu;
+ unsigned long event_id;
+};
+
+static void sse_foreign_cpu_handler(void *data, struct pt_regs *regs, unsigned int hartid)
+{
+ volatile struct sse_foreign_cpu_test_arg *arg = data;
+
+ /* For arg content to be visible */
+ smp_rmb();
+ if (arg->expected_cpu != current_thread_info()->cpu)
+ report_fail("Received event on CPU (%d), expected CPU (%d)",
+ current_thread_info()->cpu, arg->expected_cpu);
+
+ arg->done = true;
+ /* For arg update to be visible for other CPUs */
+ smp_wmb();
+}
+
+struct sse_local_per_cpu {
+ struct sse_handler_arg args;
+ unsigned long ret;
+};
+
+struct sse_local_data {
+ unsigned long event_id;
+ struct sse_local_per_cpu *cpu_args[NR_CPUS];
+};
+
+static void sse_register_enable_local(void *data)
+{
+ struct sse_local_data *local_data = data;
+ struct sse_local_per_cpu *cpu_arg = local_data->cpu_args[current_thread_info()->cpu];
+
+ cpu_arg->ret = sse_event_register(local_data->event_id, &cpu_arg->args);
+ if (cpu_arg->ret)
+ return;
+
+ cpu_arg->ret = sse_event_enable(local_data->event_id);
+}
+
+static void sse_disable_unregister_local(void *data)
+{
+ struct sse_local_data *local_data = data;
+ struct sse_local_per_cpu *cpu_arg = local_data->cpu_args[current_thread_info()->cpu];
+
+ cpu_arg->ret = sse_event_disable(local_data->event_id);
+ if (cpu_arg->ret)
+ return;
+
+ cpu_arg->ret = sse_event_unregister(local_data->event_id);
+}
+
+static void sse_test_inject_local(unsigned long event_id)
+{
+ int cpu;
+ unsigned long ret;
+ struct sse_local_data local_data;
+ struct sse_local_per_cpu *cpu_arg;
+ volatile struct sse_foreign_cpu_test_arg test_arg = {.event_id = event_id};
+
+ report_prefix_push("local_dispatch");
+ local_data.event_id = event_id;
+
+ for_each_online_cpu(cpu) {
+ cpu_arg = calloc(1, sizeof(struct sse_handler_arg));
+
+ cpu_arg->args.stack = sse_alloc_stack();
+ cpu_arg->args.handler = sse_foreign_cpu_handler;
+ cpu_arg->args.handler_data = (void *)&test_arg;
+ local_data.cpu_args[cpu] = cpu_arg;
+ }
+
+ on_cpus(sse_register_enable_local, &local_data);
+ for_each_online_cpu(cpu) {
+ if (local_data.cpu_args[cpu]->ret)
+ report_abort("CPU failed to register/enable SSE event");
+
+ test_arg.expected_cpu = cpu;
+ /* For test_arg content to be visible for other CPUs */
+ smp_wmb();
+ ret = sse_event_inject(event_id, cpus[cpu].hartid);
+ if (ret)
+ report_abort("CPU failed to register/enable SSE event");
+
+ while (!test_arg.done) {
+ /* For test_arg update to be visible */
+ smp_rmb();
+ }
+
+ test_arg.done = false;
+ }
+
+ on_cpus(sse_disable_unregister_local, &local_data);
+ for_each_online_cpu(cpu) {
+ if (local_data.cpu_args[cpu]->ret)
+ report_abort("CPU failed to disable/unregister SSE event");
+ }
+
+ for_each_online_cpu(cpu) {
+ cpu_arg = local_data.cpu_args[cpu];
+
+ sse_free_stack(cpu_arg->args.stack);
+ }
+
+ report_pass("local event dispatch on all CPUs");
+ report_prefix_pop();
+
+}
+
+static void sse_test_inject_global(unsigned long event_id)
+{
+ unsigned long ret;
+ unsigned int cpu;
+ struct sse_handler_arg args;
+ volatile struct sse_foreign_cpu_test_arg test_arg = {.event_id = event_id};
+ enum sbi_sse_state state;
+
+ args.handler = sse_foreign_cpu_handler;
+ args.handler_data = (void *)&test_arg;
+ args.stack = sse_alloc_stack();
+
+ report_prefix_push("global_dispatch");
+
+ ret = sse_event_register(event_id, &args);
+ if (ret)
+ goto done;
+
+ for_each_online_cpu(cpu) {
+ test_arg.expected_cpu = cpu;
+ /* For test_arg content to be visible for other CPUs */
+ smp_wmb();
+ ret = sse_event_set_attr(event_id, SBI_SSE_ATTR_PREFERRED_HART, cpu);
+ if (ret) {
+ report_fail("Failed to set preferred hart");
+ goto done;
+ }
+
+ ret = sse_event_enable(event_id);
+ if (ret) {
+ report_fail("Failed to enable SSE event");
+ goto done;
+ }
+
+ ret = sse_event_inject(event_id, cpu);
+ if (ret) {
+ report_fail("Failed to inject event");
+ goto done;
+ }
+
+ while (!test_arg.done) {
+ /* For shared test_arg structure */
+ smp_rmb();
+ }
+
+ test_arg.done = false;
+
+ /* Wait for event to be in ENABLED state */
+ do {
+ ret = sse_get_state(event_id, &state);
+ if (ret) {
+ report_fail("Failed to get event state");
+ goto done;
+ }
+ } while (state != SBI_SSE_STATE_ENABLED);
+
+ ret = sse_event_disable(event_id);
+ if (ret) {
+ report_fail("Failed to disable SSE event");
+ goto done;
+ }
+
+ report_pass("Global event on CPU %d", cpu);
+ }
+
+done:
+ ret = sse_event_unregister(event_id);
+ if (ret)
+ report_fail("Failed to unregister event");
+
+ sse_free_stack(args.stack);
+ report_prefix_pop();
+}
+
+struct priority_test_arg {
+ unsigned long evt;
+ bool called;
+ u32 prio;
+ struct priority_test_arg *next_evt_arg;
+ void (*check_func)(struct priority_test_arg *arg);
+};
+
+static void sse_hi_priority_test_handler(void *arg, struct pt_regs *regs,
+ unsigned int hartid)
+{
+ struct priority_test_arg *targ = arg;
+ struct priority_test_arg *next = targ->next_evt_arg;
+
+ targ->called = 1;
+ if (next) {
+ sse_event_inject(next->evt, current_thread_info()->hartid);
+ if (sse_event_pending(next->evt))
+ report_fail("Higher priority event is pending");
+ if (!next->called)
+ report_fail("Higher priority event was not handled");
+ }
+}
+
+static void sse_low_priority_test_handler(void *arg, struct pt_regs *regs,
+ unsigned int hartid)
+{
+ struct priority_test_arg *targ = arg;
+ struct priority_test_arg *next = targ->next_evt_arg;
+
+ targ->called = 1;
+
+ if (next) {
+ sse_event_inject(next->evt, current_thread_info()->hartid);
+
+ if (!sse_event_pending(next->evt))
+ report_fail("Lower priority event is pending");
+
+ if (next->called)
+ report_fail("Lower priority event %s was handle before %s",
+ sse_evt_name(next->evt), sse_evt_name(targ->evt));
+ }
+}
+
+static void sse_test_injection_priority_arg(struct priority_test_arg *in_args,
+ unsigned int in_args_size,
+ sse_handler_fn handler,
+ const char *test_name)
+{
+ unsigned int i;
+ int ret;
+ unsigned long event_id;
+ struct priority_test_arg *arg;
+ unsigned int args_size = 0;
+ struct sse_handler_arg event_args[in_args_size];
+ struct priority_test_arg *args[in_args_size];
+ void *stack;
+ struct sse_handler_arg *event_arg;
+
+ report_prefix_push(test_name);
+
+ for (i = 0; i < in_args_size; i++) {
+ arg = &in_args[i];
+ event_id = arg->evt;
+ if (!sse_evt_can_inject(event_id))
+ continue;
+
+ args[args_size] = arg;
+ args_size++;
+ }
+
+ if (!args_size) {
+ report_skip("No event injectable");
+ report_prefix_pop();
+ goto skip;
+ }
+
+ for (i = 0; i < args_size; i++) {
+ arg = args[i];
+ event_id = arg->evt;
+ stack = sse_alloc_stack();
+
+ event_arg = &event_args[i];
+ event_arg->handler = handler;
+ event_arg->handler_data = (void *)arg;
+ event_arg->stack = stack;
+
+ if (i < (args_size - 1))
+ arg->next_evt_arg = args[i + 1];
+ else
+ arg->next_evt_arg = NULL;
+
+ /* Be sure global events are targeting the current hart */
+ sse_global_event_set_current_hart(event_id);
+
+ sse_event_register(event_id, event_arg);
+ sse_event_set_attr(event_id, SBI_SSE_ATTR_PRIORITY, arg->prio);
+ sse_event_enable(event_id);
+ }
+
+ /* Inject first event */
+ ret = sse_event_inject(args[0]->evt, current_thread_info()->hartid);
+ report(ret == SBI_SUCCESS, "SSE injection no error");
+
+ for (i = 0; i < args_size; i++) {
+ arg = args[i];
+ event_id = arg->evt;
+
+ if (!arg->called)
+ report_fail("Event %s handler called", sse_evt_name(arg->evt));
+
+ sse_event_disable(event_id);
+ sse_event_unregister(event_id);
+
+ event_arg = &event_args[i];
+ sse_free_stack(event_arg->stack);
+ }
+
+skip:
+ report_prefix_pop();
+}
+
+static struct priority_test_arg hi_prio_args[] = {
+ {.evt = SBI_SSE_EVENT_GLOBAL_SOFTWARE},
+ {.evt = SBI_SSE_EVENT_LOCAL_SOFTWARE},
+ {.evt = SBI_SSE_EVENT_LOCAL_PMU},
+ {.evt = SBI_SSE_EVENT_GLOBAL_RAS},
+ {.evt = SBI_SSE_EVENT_LOCAL_RAS},
+};
+
+static struct priority_test_arg low_prio_args[] = {
+ {.evt = SBI_SSE_EVENT_LOCAL_RAS},
+ {.evt = SBI_SSE_EVENT_GLOBAL_RAS},
+ {.evt = SBI_SSE_EVENT_LOCAL_PMU},
+ {.evt = SBI_SSE_EVENT_LOCAL_SOFTWARE},
+ {.evt = SBI_SSE_EVENT_GLOBAL_SOFTWARE},
+};
+
+static struct priority_test_arg prio_args[] = {
+ {.evt = SBI_SSE_EVENT_GLOBAL_SOFTWARE, .prio = 5},
+ {.evt = SBI_SSE_EVENT_LOCAL_SOFTWARE, .prio = 10},
+ {.evt = SBI_SSE_EVENT_LOCAL_PMU, .prio = 15},
+ {.evt = SBI_SSE_EVENT_GLOBAL_RAS, .prio = 20},
+ {.evt = SBI_SSE_EVENT_LOCAL_RAS, .prio = 25},
+};
+
+static struct priority_test_arg same_prio_args[] = {
+ {.evt = SBI_SSE_EVENT_LOCAL_PMU, .prio = 0},
+ {.evt = SBI_SSE_EVENT_LOCAL_RAS, .prio = 10},
+ {.evt = SBI_SSE_EVENT_LOCAL_SOFTWARE, .prio = 10},
+ {.evt = SBI_SSE_EVENT_GLOBAL_SOFTWARE, .prio = 10},
+ {.evt = SBI_SSE_EVENT_GLOBAL_RAS, .prio = 20},
+};
+
+static void sse_test_injection_priority(void)
+{
+ report_prefix_push("prio");
+
+ sse_test_injection_priority_arg(hi_prio_args, ARRAY_SIZE(hi_prio_args),
+ sse_hi_priority_test_handler, "high");
+
+ sse_test_injection_priority_arg(low_prio_args, ARRAY_SIZE(low_prio_args),
+ sse_low_priority_test_handler, "low");
+
+ sse_test_injection_priority_arg(prio_args, ARRAY_SIZE(prio_args),
+ sse_low_priority_test_handler, "changed");
+
+ sse_test_injection_priority_arg(same_prio_args, ARRAY_SIZE(same_prio_args),
+ sse_low_priority_test_handler, "same_prio_args");
+
+ report_prefix_pop();
+}
+
+static bool sse_can_inject(unsigned long event_id)
+{
+ int ret;
+ unsigned long status;
+
+ ret = sse_event_get_attr(event_id, SBI_SSE_ATTR_STATUS, &status);
+ report(ret == 0, "SSE get attr status no error");
+ if (ret)
+ return 0;
+
+ return !!(status & BIT(SBI_SSE_ATTR_STATUS_INJECT_OFFSET));
+}
+
+static void boot_secondary(void *data)
+{
+ sse_hart_unmask();
+}
+
+static void sse_check_mask(void)
+{
+ int ret;
+
+ /* Upon boot, event are masked, check that */
+ ret = sse_hart_mask();
+ report(ret == SBI_ERR_ALREADY_STARTED, "SSE hart mask at boot time ok");
+
+ ret = sse_hart_unmask();
+ report(ret == SBI_SUCCESS, "SSE hart no error ok");
+ ret = sse_hart_unmask();
+ report(ret == SBI_ERR_ALREADY_STOPPED, "SSE hart unmask twice error ok");
+
+ ret = sse_hart_mask();
+ report(ret == SBI_SUCCESS, "SSE hart mask no error");
+ ret = sse_hart_mask();
+ report(ret == SBI_ERR_ALREADY_STARTED, "SSE hart mask twice ok");
+}
+
+void check_sse(void)
+{
+ unsigned long i, event;
+
+ report_prefix_push("sse");
+ sse_check_mask();
+
+ /*
+ * Dummy wakeup of all processors since some of them will be targeted
+ * by global events without going through the wakeup call as well as
+ * unmasking all
+ */
+ on_cpus(boot_secondary, NULL);
+
+ if (!sbi_probe(SBI_EXT_SSE)) {
+ report_skip("SSE extension not available");
+ report_prefix_pop();
+ return;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(sse_event_infos); i++) {
+ event = sse_event_infos[i].event_id;
+ report_prefix_push(sse_event_infos[i].name);
+ if (!sse_can_inject(event)) {
+ report_skip("Event does not support injection");
+ report_prefix_pop();
+ continue;
+ } else {
+ sse_event_infos[i].can_inject = true;
+ }
+ sse_test_attr(event);
+ sse_test_register_error(event);
+ sse_test_inject_simple(event);
+ if (sse_event_is_global(event))
+ sse_test_inject_global(event);
+ else
+ sse_test_inject_local(event);
+
+ report_prefix_pop();
+ }
+
+ sse_test_injection_priority();
+
+ report_prefix_pop();
+}
@@ -32,6 +32,8 @@
#define HIGH_ADDR_BOUNDARY ((phys_addr_t)1 << 32)
+void check_sse(void);
+
static long __labs(long a)
{
return __builtin_labs(a);
@@ -1451,6 +1453,7 @@ int main(int argc, char **argv)
check_hsm();
check_dbcn();
check_susp();
+ check_sse();
return report_summary();
}
Add SBI SSE extension tests for the following features: - Test attributes errors (invalid values, RO, etc) - Registration errors - Simple events (register, enable, inject) - Events with different priorities - Global events dispatch on different harts - Local events on all harts Signed-off-by: Clément Léger <cleger@rivosinc.com> --- riscv/Makefile | 2 +- lib/riscv/asm/csr.h | 2 + riscv/sbi-sse.c | 1043 +++++++++++++++++++++++++++++++++++++++++++ riscv/sbi.c | 3 + 4 files changed, 1049 insertions(+), 1 deletion(-) create mode 100644 riscv/sbi-sse.c