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envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: permerror client-ip=89.207.88.248; envelope-from=ivan.klokov@syntacore.com; helo=mta-04.yadro.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_NONE=0.001, T_SPF_PERMERROR=0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @syntacore.com) (identity @syntacore.com) X-ZM-MESSAGEID: 1719329842730100006 Content-Type: text/plain; charset="utf-8" The RISC-V architecture supports the creation of custom CSR-mapped devices. It would be convenient to test them in the same way as MMIO-mapped devices. To do this, a new call has been added to read/write CSR registers. Signed-off-by: Ivan Klokov Acked-by: Thomas Huth --- target/riscv/cpu.c | 14 +++++++++++ target/riscv/cpu.h | 3 +++ target/riscv/csr.c | 53 +++++++++++++++++++++++++++++++++++++++++- tests/qtest/libqtest.c | 27 +++++++++++++++++++++ tests/qtest/libqtest.h | 14 +++++++++++ 5 files changed, 110 insertions(+), 1 deletion(-) diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c index 69a08e8c2c..55cc01bfb3 100644 --- a/target/riscv/cpu.c +++ b/target/riscv/cpu.c @@ -1148,7 +1148,17 @@ void riscv_cpu_finalize_features(RISCVCPU *cpu, Erro= r **errp) } } } +#ifndef CONFIG_USER_ONLY +static void riscv_cpu_register_csr_qtest_callback(void) +{ + static gsize reinit_done; + if (g_once_init_enter(&reinit_done)) { + qtest_set_command_cb(csr_qtest_callback); =20 + g_once_init_leave(&reinit_done, 1); + } +} +#endif static void riscv_cpu_realize(DeviceState *dev, Error **errp) { CPUState *cs =3D CPU(dev); @@ -1174,6 +1184,10 @@ static void riscv_cpu_realize(DeviceState *dev, Erro= r **errp) } =20 riscv_cpu_register_gdb_regs_for_features(cs); +#ifndef CONFIG_USER_ONLY + /* register callback for csr qtests */ + riscv_cpu_register_csr_qtest_callback(); +#endif =20 #ifndef CONFIG_USER_ONLY if (cpu->cfg.debug) { diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h index 6fe0d712b4..6d4bbec53c 100644 --- a/target/riscv/cpu.h +++ b/target/riscv/cpu.h @@ -32,6 +32,8 @@ #include "cpu_cfg.h" #include "qapi/qapi-types-common.h" #include "cpu-qom.h" +#include "qemu/cutils.h" +#include "sysemu/qtest.h" =20 typedef struct CPUArchState CPURISCVState; =20 @@ -813,6 +815,7 @@ bool riscv_cpu_accelerator_compatible(RISCVCPU *cpu); =20 /* CSR function table */ extern riscv_csr_operations csr_ops[CSR_TABLE_SIZE]; +bool csr_qtest_callback(CharBackend *chr, gchar **words); =20 extern const bool valid_vm_1_10_32[], valid_vm_1_10_64[]; =20 diff --git a/target/riscv/csr.c b/target/riscv/csr.c index 58ef7079dc..f4f5128c9c 100644 --- a/target/riscv/csr.c +++ b/target/riscv/csr.c @@ -29,7 +29,7 @@ #include "sysemu/cpu-timers.h" #include "qemu/guest-random.h" #include "qapi/error.h" - +#include "tests/qtest/libqtest.h" =20 /* CSR function table public API */ void riscv_get_csr_ops(int csrno, riscv_csr_operations *ops) @@ -4549,6 +4549,57 @@ static RISCVException write_jvt(CPURISCVState *env, = int csrno, return RISCV_EXCP_NONE; } =20 +#if !defined(CONFIG_USER_ONLY) +static uint64_t csr_call(char *cmd, uint64_t cpu_num, int csrno, + uint64_t *val) +{ + RISCVCPU *cpu =3D RISCV_CPU(cpu_by_arch_id(cpu_num)); + CPURISCVState *env =3D &cpu->env; + + int ret =3D RISCV_EXCP_NONE; + if (strcmp(cmd, "get_csr") =3D=3D 0) { + ret =3D riscv_csrrw(env, csrno, (target_ulong *)val, 0, 0); + + } else if (strcmp(cmd, "set_csr") =3D=3D 0) { + ret =3D riscv_csrrw(env, csrno, NULL, *(target_ulong *)val, MAKE_6= 4BIT_MASK(0, TARGET_LONG_BITS)); + } + + if (ret =3D=3D RISCV_EXCP_NONE) { + ret =3D 0; + } else { + g_assert_not_reached(); + } + + return ret; +} + +bool csr_qtest_callback(CharBackend *chr, gchar **words) +{ + if (strcmp(words[0], "csr") =3D=3D 0) { + + uint64_t res, cpu; + + uint64_t val; + int rc, csr; + + rc =3D qemu_strtou64(words[2], NULL, 0, &cpu); + g_assert(rc =3D=3D 0); + rc =3D qemu_strtoi(words[3], NULL, 0, &csr); + g_assert(rc =3D=3D 0); + rc =3D qemu_strtou64(words[4], NULL, 0, &val); + g_assert(rc =3D=3D 0); + res =3D csr_call(words[1], cpu, csr, &val); + + qtest_send_prefix(chr); + qtest_sendf(chr, "OK %"PRIx64" "TARGET_FMT_lx"\n", res, (target_ul= ong)val); + + return true; + } + + return false; +} +#endif + /* * Control and Status Register function table * riscv_csr_operations::predicate() must be provided for an implemented C= SR diff --git a/tests/qtest/libqtest.c b/tests/qtest/libqtest.c index c7f6897d78..f8c3ff15a9 100644 --- a/tests/qtest/libqtest.c +++ b/tests/qtest/libqtest.c @@ -1205,6 +1205,33 @@ uint64_t qtest_rtas_call(QTestState *s, const char *= name, return 0; } =20 +static void qtest_rsp_csr(QTestState *s, uint64_t *val) +{ + gchar **args; + uint64_t ret; + int rc; + + args =3D qtest_rsp_args(s, 3); + + rc =3D qemu_strtou64(args[1], NULL, 16, &ret); + g_assert(rc =3D=3D 0); + rc =3D qemu_strtou64(args[2], NULL, 16, val); + g_assert(rc =3D=3D 0); + + g_strfreev(args); +} + +uint64_t qtest_csr_call(QTestState *s, const char *name, + uint64_t cpu, int csr, + uint64_t *val) +{ + qtest_sendf(s, "csr %s 0x%"PRIx64" %d 0x%"PRIx64"\n", + name, cpu, csr, *val); + + qtest_rsp_csr(s, val); + return 0; +} + void qtest_add_func(const char *str, void (*fn)(void)) { gchar *path =3D g_strdup_printf("/%s/%s", qtest_get_arch(), str); diff --git a/tests/qtest/libqtest.h b/tests/qtest/libqtest.h index c261b7e0b3..53cd8fe9f0 100644 --- a/tests/qtest/libqtest.h +++ b/tests/qtest/libqtest.h @@ -577,6 +577,20 @@ uint64_t qtest_rtas_call(QTestState *s, const char *na= me, uint32_t nargs, uint64_t args, uint32_t nret, uint64_t ret); =20 +/** + * qtest_csr_call: + * @s: #QTestState instance to operate on. + * @name: name of the command to call. + * @cpu: hart number. + * @csr: CSR number. + * @val: Value for reading/writing. + * + * Call an CSR function + */ +uint64_t qtest_csr_call(QTestState *s, const char *name, + uint64_t cpu, int csr, + unsigned long *val); + /** * qtest_bufread: * @s: #QTestState instance to operate on. --=20 2.34.1