Port the kernel model

src/emu/CMakeLists.txt

@@ -49,6 +49,8 @@ add_library(emu STATIC
   nosv/event.c
   nodes/setup.c
   nodes/event.c
+  kernel/setup.c
+  kernel/event.c
 )
 
 add_executable(ovniemu ovniemu.c)

src/emu/emu.c

@@ -46,7 +46,7 @@ emu_init(struct emu *emu, int argc, char *argv[])
 	}
 
 	if (player_init(&emu->player, &emu->trace) != 0) {
-		err("emu_init: cannot init player for trace '%s'\n",
+		err("cannot init player for trace '%s'\n",
 				emu->args.tracedir);
 		return -1;
 	}
@@ -54,7 +54,10 @@ emu_init(struct emu *emu, int argc, char *argv[])
 	model_init(&emu->model);
 
 	/* Register all the models */
-	models_register(&emu->model);
+	if (models_register(&emu->model) != 0) {
+		err("failed to register models");
+		return -1;
+	}
 
 	if (model_probe(&emu->model, emu) != 0) {
 		err("model_probe failed");

src/emu/kernel.c

@@ -1,76 +0,0 @@
-/* Copyright (c) 2021 Barcelona Supercomputing Center (BSC)
- * SPDX-License-Identifier: GPL-3.0-or-later */
-
-#include "uthash.h"
-
-#include "chan.h"
-#include "emu.h"
-#include "ovni.h"
-#include "prv.h"
-#include "trace.h"
-
-/* --------------------------- init ------------------------------- */
-
-void
-hook_init_kernel(struct ovni_emu *emu)
-{
-	int64_t *clock = &emu->delta_time;
-	FILE *prv_th = emu->prv_thread;
-	FILE *prv_cpu = emu->prv_cpu;
-
-	/* Init the channels in all threads */
-	for (size_t i = 0; i < emu->total_nthreads; i++) {
-		struct ovni_ethread *th = emu->global_thread[i];
-		int row = th->gindex + 1;
-		struct ovni_chan **uth = &emu->th_chan;
-
-		chan_th_init(th, uth, CHAN_KERNEL_CS, CHAN_TRACK_NONE, 0, 1, 1, row, prv_th, clock);
-	}
-
-	/* Init the channels in all cpus */
-	for (size_t i = 0; i < emu->total_ncpus; i++) {
-		struct ovni_cpu *cpu = emu->global_cpu[i];
-		int row = cpu->gindex + 1;
-		struct ovni_chan **ucpu = &emu->cpu_chan;
-
-		chan_cpu_init(cpu, ucpu, CHAN_KERNEL_CS, CHAN_TRACK_TH_ACTIVE, 0, 0, 1, row, prv_cpu, clock);
-	}
-}
-
-/* --------------------------- pre ------------------------------- */
-
-static void
-context_switch(struct ovni_emu *emu)
-{
-	struct ovni_ethread *th = emu->cur_thread;
-	struct ovni_chan *chan = &th->chan[CHAN_KERNEL_CS];
-
-	switch (emu->cur_ev->header.value) {
-		case 'O':
-			chan_push(chan, ST_KERNEL_CSOUT);
-			break;
-		case 'I':
-			chan_pop(chan, ST_KERNEL_CSOUT);
-			break;
-		default:
-			edie(emu, "unexpected value '%c' (expecting 'O' or 'I')\n",
-					emu->cur_ev->header.value);
-	}
-}
-
-void
-hook_pre_kernel(struct ovni_emu *emu)
-{
-	if (emu->cur_ev->header.model != 'K')
-		edie(emu, "hook_pre_kernel: unexpected event with model %c\n",
-				emu->cur_ev->header.model);
-
-	switch (emu->cur_ev->header.category) {
-		case 'C':
-			context_switch(emu);
-			break;
-		default:
-			edie(emu, "hook_pre_kernel: unexpected event with category %c\n",
-					emu->cur_ev->header.category);
-	}
-}

src/emu/kernel/event.c

@@ -0,0 +1,68 @@
+#include "kernel_priv.h"
+
+enum { PUSH = 1, POP = 2, IGN = 3 };
+
+static const int ss_table[256][256][3] = {
+	['C'] = {
+		['O'] = { CH_CS, PUSH, ST_CSOUT },
+		['I'] = { CH_CS, POP,  ST_CSOUT },
+	},
+};
+
+static int
+simple(struct emu *emu)
+{
+	const int *entry = ss_table[emu->ev->c][emu->ev->v];
+	int chind = entry[0];
+	int action = entry[1];
+	int st = entry[2];
+
+	struct kernel_thread *th = EXT(emu->thread, 'K');
+	struct chan *ch = &th->m.ch[chind];
+
+	if (action == PUSH) {
+		return chan_push(ch, value_int64(st));
+	} else if (action == POP) {
+		return chan_pop(ch, value_int64(st));
+	} else if (action == IGN) {
+		return 0; /* do nothing */
+	} else {
+		err("unknown event");
+		return -1;
+	}
+
+	return 0;
+}
+
+static int
+process_ev(struct emu *emu)
+{
+	switch (emu->ev->c) {
+		case 'C':
+			return simple(emu);
+		default:
+			err("unknown Kernel event category");
+			return -1;
+	}
+
+	/* Not reached */
+	return 0;
+}
+
+int
+kernel_event(struct emu *emu)
+{
+	dbg("in kernel_event");
+	if (emu->ev->m != 'K') {
+		err("unexpected event model %c\n", emu->ev->m);
+		return -1;
+	}
+
+	dbg("got kernel event %s", emu->ev->mcv);
+	if (process_ev(emu) != 0) {
+		err("error processing Kernel event");
+		return -1;
+	}
+
+	return 0;
+}

src/emu/kernel/kernel_priv.h

@@ -0,0 +1,36 @@
+/* Copyright (c) 2023 Barcelona Supercomputing Center (BSC)
+ * SPDX-License-Identifier: GPL-3.0-or-later */
+
+#ifndef KERNEL_PRIV_H
+#define KERNEL_PRIV_H
+
+#include "emu.h"
+#include "model_cpu.h"
+#include "model_thread.h"
+
+/* Private enums */
+
+enum kernel_chan {
+	CH_CS = 0,
+	CH_MAX,
+};
+
+enum kernel_cs_state {
+	ST_CSOUT = 3,
+};
+
+struct kernel_thread {
+	struct model_thread m;
+};
+
+struct kernel_cpu {
+	struct model_cpu m;
+};
+
+int kernel_probe(struct emu *emu);
+int kernel_create(struct emu *emu);
+int kernel_connect(struct emu *emu);
+int kernel_event(struct emu *emu);
+int kernel_finish(struct emu *emu);
+
+#endif /* KERNEL_PRIV_H */

src/emu/kernel/setup.c

@@ -0,0 +1,135 @@
+#include "kernel_priv.h"
+
+static const char model_name[] = "kernel";
+static const int model_id = 'K';
+
+struct model_spec model_kernel = {
+	.name = model_name,
+	.model = model_id,
+	.create  = kernel_create,
+	.connect = kernel_connect,
+	.event   = kernel_event,
+	.probe   = kernel_probe,
+};
+
+/* ----------------- channels ------------------ */
+
+static const char *chan_name[CH_MAX] = {
+	[CH_CS] = "subsystem",
+};
+
+static const int chan_stack[CH_MAX] = {
+	[CH_CS] = 1,
+};
+
+/* ----------------- pvt ------------------ */
+
+static const int pvt_type[] = {
+	[CH_CS] = 45,
+};
+
+static const char *pcf_prefix[CH_MAX] = {
+	[CH_CS]   = "Kernel subsystem",
+};
+
+static const struct pcf_value_label kernel_cs_values[] = {
+	{ ST_CSOUT,      "Context switch: Out of the CPU" },
+	{ -1, NULL },
+};
+
+static const struct pcf_value_label (*pcf_labels[CH_MAX])[] = {
+	[CH_CS] = &kernel_cs_values,
+};
+
+static const struct model_pvt_spec pvt_spec = {
+	.type = pvt_type,
+	.prefix = pcf_prefix,
+	.label = pcf_labels,
+};
+
+/* ----------------- tracking ------------------ */
+
+static const int th_track[CH_MAX] = {
+	[CH_CS] = TRACK_TH_ANY,
+};
+
+static const int cpu_track[CH_MAX] = {
+	[CH_CS] = TRACK_TH_RUN, /* FIXME: Why active */
+};
+
+/* ----------------- chan_spec ------------------ */
+
+static const struct model_chan_spec th_chan = {
+	.nch = CH_MAX,
+	.prefix = model_name,
+	.ch_names = chan_name,
+	.ch_stack = chan_stack,
+	.pvt = &pvt_spec,
+	.track = th_track,
+};
+
+static const struct model_chan_spec cpu_chan = {
+	.nch = CH_MAX,
+	.prefix = model_name,
+	.ch_names = chan_name,
+	.ch_stack = chan_stack,
+	.pvt = &pvt_spec,
+	.track = cpu_track,
+};
+
+/* ----------------- models ------------------ */
+
+static const struct model_cpu_spec cpu_spec = {
+	.size = sizeof(struct kernel_cpu),
+	.chan = &cpu_chan,
+	.model = &model_kernel,
+};
+
+static const struct model_thread_spec th_spec = {
+	.size = sizeof(struct kernel_thread),
+	.chan = &th_chan,
+	.model = &model_kernel,
+};
+
+/* ----------------------------------------------------- */
+
+int
+kernel_probe(struct emu *emu)
+{
+	if (emu->system.nthreads == 0)
+		return 1;
+
+	return 0;
+}
+
+int
+kernel_create(struct emu *emu)
+{
+	if (model_thread_create(emu, &th_spec) != 0) {
+		err("model_thread_init failed");
+		return -1;
+	}
+
+	if (model_cpu_create(emu, &cpu_spec) != 0) {
+		err("model_cpu_init failed");
+		return -1;
+	}
+
+	return 0;
+}
+
+int
+kernel_connect(struct emu *emu)
+{
+	if (model_thread_connect(emu, &th_spec) != 0) {
+		err("model_thread_connect failed");
+		return -1;
+	}
+
+	if (model_cpu_connect(emu, &cpu_spec) != 0) {
+		err("model_cpu_connect failed");
+		return -1;
+	}
+
+	return 0;
+}

src/emu/model.c

@@ -14,14 +14,21 @@ model_init(struct model *model)
 	memset(model, 0, sizeof(struct model));
 }
 
-void
+int
 model_register(struct model *model, struct model_spec *spec)
 {
 	int i = spec->model;
+
+	if (model->registered[i]) {
+		err("model %c already registered", i);
+		return -1;
+	}
+
 	model->spec[i] = spec;
 	model->registered[i] = 1;
 
 	dbg("registered model %c", (char) i);
+	return 0;
 }
 
 int

src/emu/model.h

@@ -26,7 +26,7 @@ struct model {
 };
 
 void model_init(struct model *model);
-void model_register(struct model *model, struct model_spec *spec);
+int model_register(struct model *model, struct model_spec *spec);
 
 int model_probe(struct model *model, struct emu *emu);
 int model_create(struct model *model, struct emu *emu);

src/emu/models.c

@@ -3,25 +3,33 @@
 
 #include "models.h"
 
+#include "common.h"
 #include <stdlib.h>
 
 extern struct model_spec model_ovni;
 extern struct model_spec model_nanos6;
 extern struct model_spec model_nosv;
 extern struct model_spec model_nodes;
+extern struct model_spec model_kernel;
 
 static struct model_spec *models[] = {
 	&model_ovni,
 	&model_nanos6,
 	&model_nosv,
 	&model_nodes,
+	&model_kernel,
 	NULL
 };
 
-void
+int
 models_register(struct model *model)
 {
 	for (int i = 0; models[i] != NULL; i++) {
-		model_register(model, models[i]);
+		if (model_register(model, models[i]) != 0) {
+			err("model_register failed");
+			return -1;
 		}
+	}
+
+	return 0;
 }

src/emu/models.h

@@ -6,7 +6,7 @@
 
 #include "model.h"
 
-void
+int
 models_register(struct model *model);
 
 #endif /* MODELS_H */