tests: add RTAS command in the protocol

Add a first test to validate the protocol:

- rtas/get-time-of-day compares the time
  from the guest with the time from the host.
Signed-off-by: NLaurent Vivier <lvivier@redhat.com>
Reviewed-by: NGreg Kurz <groug@kaod.org>
Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>

hw/ppc/spapr_rtas.c

@@ -37,6 +37,7 @@
 
 #include "hw/ppc/spapr.h"
 #include "hw/ppc/spapr_vio.h"
+#include "hw/ppc/spapr_rtas.h"
 #include "hw/ppc/ppc.h"
 #include "qapi-event.h"
 #include "hw/boards.h"
@@ -692,6 +693,24 @@ target_ulong spapr_rtas_call(PowerPCCPU *cpu, sPAPRMachineState *spapr,
     return H_PARAMETER;
 }
 
+uint64_t qtest_rtas_call(char *cmd, uint32_t nargs, uint64_t args,
+                         uint32_t nret, uint64_t rets)
+{
+    int token;
+
+    for (token = 0; token < RTAS_TOKEN_MAX - RTAS_TOKEN_BASE; token++) {
+        if (strcmp(cmd, rtas_table[token].name) == 0) {
+            sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
+            PowerPCCPU *cpu = POWERPC_CPU(first_cpu);
+
+            rtas_table[token].fn(cpu, spapr, token + RTAS_TOKEN_BASE,
+                                 nargs, args, nret, rets);
+            return H_SUCCESS;
+        }
+    }
+    return H_PARAMETER;
+}
+
 void spapr_rtas_register(int token, const char *name, spapr_rtas_fn fn)
 {
     assert((token >= RTAS_TOKEN_BASE) && (token < RTAS_TOKEN_MAX));

include/hw/ppc/spapr_rtas.h

+#ifndef HW_SPAPR_RTAS_H
+#define HW_SPAPR_RTAS_H
+/*
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+uint64_t qtest_rtas_call(char *cmd, uint32_t nargs, uint64_t args,
+                         uint32_t nret, uint64_t rets);
+#endif /* HW_SPAPR_RTAS_H */

qtest.c

@@ -28,6 +28,9 @@
 #include "qemu/option.h"
 #include "qemu/error-report.h"
 #include "qemu/cutils.h"
+#ifdef TARGET_PPC64
+#include "hw/ppc/spapr_rtas.h"
+#endif
 
 #define MAX_IRQ 256
 
@@ -534,6 +537,20 @@ static void qtest_process_command(CharDriverState *chr, gchar **words)
 
         qtest_send_prefix(chr);
         qtest_send(chr, "OK\n");
+#ifdef TARGET_PPC64
+    } else if (strcmp(words[0], "rtas") == 0) {
+        uint64_t res, args, ret;
+        unsigned long nargs, nret;
+
+        g_assert(qemu_strtoul(words[2], NULL, 0, &nargs) == 0);
+        g_assert(qemu_strtoull(words[3], NULL, 0, &args) == 0);
+        g_assert(qemu_strtoul(words[4], NULL, 0, &nret) == 0);
+        g_assert(qemu_strtoull(words[5], NULL, 0, &ret) == 0);
+        res = qtest_rtas_call(words[1], nargs, args, nret, ret);
+
+        qtest_send_prefix(chr);
+        qtest_sendf(chr, "OK %"PRIu64"\n", res);
+#endif
     } else if (qtest_enabled() && strcmp(words[0], "clock_step") == 0) {
         int64_t ns;
 

tests/Makefile.include

@@ -268,6 +268,7 @@ check-qtest-ppc64-y += tests/prom-env-test$(EXESUF)
 check-qtest-ppc64-y += tests/drive_del-test$(EXESUF)
 check-qtest-ppc64-y += tests/postcopy-test$(EXESUF)
 check-qtest-ppc64-y += tests/boot-serial-test$(EXESUF)
+check-qtest-ppc64-y += tests/rtas-test$(EXESUF)
 
 check-qtest-sh4-y = tests/endianness-test$(EXESUF)
 
@@ -585,6 +586,7 @@ libqos-obj-y = tests/libqos/pci.o tests/libqos/fw_cfg.o tests/libqos/malloc.o
 libqos-obj-y += tests/libqos/i2c.o tests/libqos/libqos.o
 libqos-spapr-obj-y = $(libqos-obj-y) tests/libqos/malloc-spapr.o
 libqos-spapr-obj-y += tests/libqos/libqos-spapr.o
+libqos-spapr-obj-y += tests/libqos/rtas.o
 libqos-pc-obj-y = $(libqos-obj-y) tests/libqos/pci-pc.o
 libqos-pc-obj-y += tests/libqos/malloc-pc.o tests/libqos/libqos-pc.o
 libqos-pc-obj-y += tests/libqos/ahci.o
@@ -599,6 +601,7 @@ tests/m48t59-test$(EXESUF): tests/m48t59-test.o
 tests/endianness-test$(EXESUF): tests/endianness-test.o
 tests/spapr-phb-test$(EXESUF): tests/spapr-phb-test.o $(libqos-obj-y)
 tests/prom-env-test$(EXESUF): tests/prom-env-test.o $(libqos-obj-y)
+tests/rtas-test$(EXESUF): tests/rtas-test.o $(libqos-spapr-obj-y)
 tests/fdc-test$(EXESUF): tests/fdc-test.o
 tests/ide-test$(EXESUF): tests/ide-test.o $(libqos-pc-obj-y)
 tests/ahci-test$(EXESUF): tests/ahci-test.o $(libqos-pc-obj-y)

tests/libqos/rtas.c

+/*
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#include "qemu/osdep.h"
+#include "libqtest.h"
+#include "libqos/rtas.h"
+
+static void qrtas_copy_args(uint64_t target_args, uint32_t nargs,
+                            uint32_t *args)
+{
+    int i;
+
+    for (i = 0; i < nargs; i++) {
+        writel(target_args + i * sizeof(uint32_t), args[i]);
+    }
+}
+
+static void qrtas_copy_ret(uint64_t target_ret, uint32_t nret, uint32_t *ret)
+{
+    int i;
+
+    for (i = 0; i < nret; i++) {
+        ret[i] = readl(target_ret + i * sizeof(uint32_t));
+    }
+}
+
+static uint64_t qrtas_call(QGuestAllocator *alloc, const char *name,
+                           uint32_t nargs, uint32_t *args,
+                           uint32_t nret, uint32_t *ret)
+{
+    uint64_t res;
+    uint64_t target_args, target_ret;
+
+    target_args = guest_alloc(alloc, nargs * sizeof(uint32_t));
+    target_ret = guest_alloc(alloc, nret * sizeof(uint32_t));
+
+    qrtas_copy_args(target_args, nargs, args);
+    res = qtest_rtas_call(global_qtest, name,
+                          nargs, target_args, nret, target_ret);
+    qrtas_copy_ret(target_ret, nret, ret);
+
+    guest_free(alloc, target_ret);
+    guest_free(alloc, target_args);
+
+    return res;
+}
+
+int qrtas_get_time_of_day(QGuestAllocator *alloc, struct tm *tm, uint32_t *ns)
+{
+    int res;
+    uint32_t ret[8];
+
+    res = qrtas_call(alloc, "get-time-of-day", 0, NULL, 8, ret);
+    if (res != 0) {
+        return res;
+    }
+
+    res = ret[0];
+    memset(tm, 0, sizeof(*tm));
+    tm->tm_year = ret[1] - 1900;
+    tm->tm_mon = ret[2] - 1;
+    tm->tm_mday = ret[3];
+    tm->tm_hour = ret[4];
+    tm->tm_min = ret[5];
+    tm->tm_sec = ret[6];
+    *ns = ret[7];
+
+    return res;
+}

tests/libqos/rtas.h

+/*
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#ifndef LIBQOS_RTAS_H
+#define LIBQOS_RTAS_H
+#include "libqos/malloc.h"
+
+int qrtas_get_time_of_day(QGuestAllocator *alloc, struct tm *tm, uint32_t *ns);
+#endif /* LIBQOS_RTAS_H */

tests/libqtest.c

@@ -751,6 +751,16 @@ void qtest_memread(QTestState *s, uint64_t addr, void *data, size_t size)
     g_strfreev(args);
 }
 
+uint64_t qtest_rtas_call(QTestState *s, const char *name,
+                         uint32_t nargs, uint64_t args,
+                         uint32_t nret, uint64_t ret)
+{
+    qtest_sendf(s, "rtas %s %u 0x%"PRIx64" %u 0x%"PRIx64"\n",
+                name, nargs, args, nret, ret);
+    qtest_rsp(s, 0);
+    return 0;
+}
+
 void qtest_add_func(const char *str, void (*fn)(void))
 {
     gchar *path = g_strdup_printf("/%s/%s", qtest_get_arch(), str);

tests/libqtest.h

@@ -317,6 +317,21 @@ uint64_t qtest_readq(QTestState *s, uint64_t addr);
  */
 void qtest_memread(QTestState *s, uint64_t addr, void *data, size_t size);
 
+/**
+ * qtest_rtas_call:
+ * @s: #QTestState instance to operate on.
+ * @name: name of the command to call.
+ * @nargs: Number of args.
+ * @args: Guest address to read args from.
+ * @nret: Number of return value.
+ * @ret: Guest address to write return values to.
+ *
+ * Call an RTAS function
+ */
+uint64_t qtest_rtas_call(QTestState *s, const char *name,
+                         uint32_t nargs, uint64_t args,
+                         uint32_t nret, uint64_t ret);
+
 /**
  * qtest_bufread:
  * @s: #QTestState instance to operate on.

tests/rtas-test.c

+#include "qemu/osdep.h"
+#include "qemu/cutils.h"
+#include "libqtest.h"
+
+#include "libqos/libqos-spapr.h"
+#include "libqos/rtas.h"
+
+static void test_rtas_get_time_of_day(void)
+{
+    QOSState *qs;
+    struct tm tm;
+    uint32_t ns;
+    uint64_t ret;
+    time_t t1, t2;
+
+    qs = qtest_spapr_boot("-machine pseries");
+    g_assert(qs != NULL);
+
+    t1 = time(NULL);
+    ret = qrtas_get_time_of_day(qs->alloc, &tm, &ns);
+    g_assert_cmpint(ret, ==, 0);
+    t2 = mktimegm(&tm);
+    g_assert(t2 - t1 < 5); /* 5 sec max to run the test */
+
+    qtest_spapr_shutdown(qs);
+}
+
+int main(int argc, char *argv[])
+{
+    const char *arch = qtest_get_arch();
+
+    g_test_init(&argc, &argv, NULL);
+
+    if (strcmp(arch, "ppc64")) {
+        g_printerr("RTAS requires ppc64-softmmu/qemu-system-ppc64\n");
+        exit(EXIT_FAILURE);
+    }
+    qtest_add_func("rtas/get-time-of-day", test_rtas_get_time_of_day);
+
+    return g_test_run();
+}