dm:ith: intel trace hub as ACPI device

Add "ith" to ACPI device list to  support tracing capabilities,
by --acpidev_pt parameter.

Tracked-On: projectacrn#8730
Signed-off-by : Singh,Ashish <[email protected]>

devicemodel/Makefile

@@ -129,6 +129,7 @@ SRCS += hw/platform/tpm/tpm_emulator.c
 SRCS += hw/platform/tpm/tpm_crb.c
 SRCS += hw/platform/tpm/tpm.c
 SRCS += hw/platform/uart.c
+SRCS += hw/platform/ith.c
 SRCS += hw/platform/debugexit.c
 SRCS += hw/pci/wdt_i6300esb.c
 SRCS += hw/pci/lpc.c

devicemodel/hw/platform/ith.c

@@ -0,0 +1,123 @@
+/*
+ * Copyright (C) 2018-2022 Intel Corporation.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdbool.h>
+#include <errno.h>
+
+#include "acpi.h"
+#include "vmmapi.h"
+#include "log.h"
+#include "acpi_dev.h"
+#include "dm.h"
+
+static int pt_ith_init(struct vmctx *ctx, struct acrn_acpidev *ith_dev);
+static int is_hid_ith(char *opts);
+static void ith_write_dsdt(struct vmctx *ctx, struct acpi_dev *ith_dev);
+static void ith_write_madt(struct vmctx *ctx, FILE *fp, struct acpi_dev *ith_dev);
+
+struct acpi_dev_ops pt_ith_dev_ops = {
+	.match = is_hid_ith,
+	.init = pt_ith_init,
+	.deinit = deinit_pt_acpidev,
+	.write_dsdt = ith_write_dsdt,
+	.write_madt = ith_write_madt,
+};
+DEFINE_ACPI_DEV(pt_ith_dev_ops);
+
+char* ith_device_id[] = {
+	/* Tiger Lake */
+	"INTC1001",
+	/* Alder Lake */
+	"INTC1001",
+	/* Elkhart Lake */
+	"INTC1001"
+};
+
+static int pt_ith_init(struct vmctx *ctx, struct acrn_acpidev *ith_dev)
+{
+	if(!ctx || !ith_dev)
+		return -EINVAL;
+
+	strcpy(ith_dev->name, "ith");
+	return init_pt_acpidev(ctx, ith_dev);
+}
+
+static int is_hid_ith(char *opts)
+{
+	char *hid, *vtopts, *devopts;
+
+	if (!opts || !*opts)
+		return false;
+
+	vtopts = devopts = strdup(opts);
+	hid = strsep(&devopts, ",");
+	if (!hid) {
+		free(vtopts);
+		return false;
+	}
+
+	for (int i = 0; i < (sizeof(ith_device_id) / sizeof(ith_device_id[0])); i++) {
+		if (strstr(hid, ith_device_id[i]) != NULL)	{
+			strcpy(pt_ith_dev_ops.hid, hid);
+			free(vtopts);
+			return true;
+		}
+	}
+
+	free(vtopts);
+	return false;
+}
+
+static void ith_write_dsdt(struct vmctx *ctx, struct acpi_dev *ith_dev)
+{
+	dsdt_line("");
+	dsdt_line("  Scope (_SB)");
+	dsdt_line("  {");
+	dsdt_line("    Device (GPI%s)", ith_dev->uid);
+	dsdt_line("    {");
+	dsdt_line("      Method (_HID, 0, NotSerialized)");
+	dsdt_line("      {");
+	dsdt_line("        Return (\"%s\")", ith_dev->hid);
+	dsdt_line("      }");
+	dsdt_line("      Name (_UID, %s)", ith_dev->uid);
+	dsdt_line("      Name (_CRS, ResourceTemplate ()");
+	dsdt_line("      {");
+	dsdt_indent(4);
+	for (int i = 0; i < ACPIDEV_RES_NUM; i++) {
+		if (ith_dev->dev.res[i].type == IRQ_RES) {
+			dsdt_line("    Interrupt (ResourceConsumer, Level, ActiveLow, Shared, ,,)");
+			dsdt_line("    {");
+			dsdt_line("        0X%08X,", ith_dev->dev.res[i].irq_res.irq);
+			dsdt_line("    }");
+		} else if (ith_dev->dev.res[i].type == MEMORY_RES) {
+			dsdt_fixed_mem32(ith_dev->dev.res[i].mmio_res.user_vm_pa, ith_dev->dev.res[i].mmio_res.size);
+		}
+	}
+	dsdt_unindent(4);
+	dsdt_line("      })");
+	dsdt_line("    }");
+	dsdt_line("  }");
+}
+
+static void ith_write_madt(struct vmctx *ctx, FILE *fp, struct acpi_dev *ith_dev)
+{
+	for (int i = 0; i < ACPIDEV_RES_NUM; i++) {
+		if (ith_dev->dev.res[i].type == IRQ_RES) {
+			EFPRINTF(fp, "[0001]\t\tSubtable Type : 02\n");
+			EFPRINTF(fp, "[0001]\t\tLength : 0A\n");
+			EFPRINTF(fp, "[0001]\t\tBus : 00\n");
+			EFPRINTF(fp, "[0001]\t\tSource : %02X\n", ith_dev->dev.res[i].irq_res.irq);
+			EFPRINTF(fp, "[0004]\t\tInterrupt : %08X\n", ith_dev->dev.res[i].irq_res.irq);
+			EFPRINTF(fp, "[0002]\t\tFlags (decoded below) : 000F\n");
+			EFPRINTF(fp, "\t\t\tPolarity : %d\n", ith_dev->dev.res[i].irq_res.polarity);
+			EFPRINTF(fp, "\t\t\tTrigger Mode : %d\n", ith_dev->dev.res[i].irq_res.trigger_mode);
+			EFPRINTF(fp, "\n");
+		}
+	}
+}