diff mbox series

[7/8] hw/hexagon: Define hexagon "virt" machine

Message ID 20250301172045.1295412-8-brian.cain@oss.qualcomm.com (mailing list archive)
State New
Headers show
Series hexagon system emu, part 3/3 | expand

Commit Message

Brian Cain March 1, 2025, 5:20 p.m. UTC
From: Brian Cain <bcain@quicinc.com>

Signed-off-by: Brian Cain <brian.cain@oss.qualcomm.com>
---
 configs/devices/hexagon-softmmu/default.mak |   1 +
 configs/targets/hexagon-softmmu.mak         |   1 +
 include/hw/hexagon/virt.h                   |  41 ++
 hw/hexagon/virt.c                           | 395 ++++++++++++++++++++
 target/hexagon/cpu.c                        |   2 +-
 hw/hexagon/Kconfig                          |   8 +
 hw/hexagon/meson.build                      |   2 +
 7 files changed, 449 insertions(+), 1 deletion(-)
 create mode 100644 include/hw/hexagon/virt.h
 create mode 100644 hw/hexagon/virt.c
diff mbox series

Patch

diff --git a/configs/devices/hexagon-softmmu/default.mak b/configs/devices/hexagon-softmmu/default.mak
index 08e709aea7..37b4f9f323 100644
--- a/configs/devices/hexagon-softmmu/default.mak
+++ b/configs/devices/hexagon-softmmu/default.mak
@@ -3,5 +3,6 @@ 
 # Uncomment the following lines to disable these optional devices:
 
 # Boards are selected by default, uncomment to keep out of the build.
+# CONFIG_HEX_VIRT=y
 # CONFIG_HEX_DSP=y
 # CONFIG_L2VIC=y
diff --git a/configs/targets/hexagon-softmmu.mak b/configs/targets/hexagon-softmmu.mak
index 8c208bf468..9f8fca1dc1 100644
--- a/configs/targets/hexagon-softmmu.mak
+++ b/configs/targets/hexagon-softmmu.mak
@@ -4,3 +4,4 @@  TARGET_ARCH=hexagon
 TARGET_SUPPORTS_MTTCG=y
 TARGET_XML_FILES=gdb-xml/hexagon-core.xml gdb-xml/hexagon-hvx.xml gdb-xml/hexagon-sys.xml
 TARGET_LONG_BITS=32
+TARGET_NEED_FDT=y
diff --git a/include/hw/hexagon/virt.h b/include/hw/hexagon/virt.h
new file mode 100644
index 0000000000..0c165a786d
--- /dev/null
+++ b/include/hw/hexagon/virt.h
@@ -0,0 +1,41 @@ 
+/*
+ * Definitions for hexagon virt board.
+ *
+ * Copyright (c) 2024-2025 Qualcomm Innovation Center, Inc. All Rights Reserved.
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#ifndef HW_HEXAGONVIRT_H
+#define HW_HEXAGONVIRT_H
+
+#include "hw/boards.h"
+#include "target/hexagon/cpu.h"
+
+struct HexagonVirtMachineState {
+    /*< private >*/
+    MachineState parent_obj;
+
+    int fdt_size;
+    MemoryRegion *sys;
+    MemoryRegion cfgtable;
+    MemoryRegion ram;
+    MemoryRegion tcm;
+    MemoryRegion vtcm;
+    DeviceState *l2vic;
+};
+
+void hexagon_load_fdt(const struct HexagonVirtMachineState *vms);
+
+enum {
+    VIRT_UART0,
+    VIRT_QTMR0,
+    VIRT_QTMR1,
+    VIRT_GPT,
+    VIRT_MMIO,
+    VIRT_FDT,
+};
+
+#define TYPE_HEXAGON_VIRT_MACHINE MACHINE_TYPE_NAME("virt")
+OBJECT_DECLARE_SIMPLE_TYPE(HexagonVirtMachineState, HEXAGON_VIRT_MACHINE)
+
+#endif /* HW_HEXAGONVIRT_H */
diff --git a/hw/hexagon/virt.c b/hw/hexagon/virt.c
new file mode 100644
index 0000000000..a2e4cc8c6c
--- /dev/null
+++ b/hw/hexagon/virt.c
@@ -0,0 +1,395 @@ 
+/*
+ * Hexagon virt emulation
+ *
+ * Copyright (c) 2024-2025 Qualcomm Innovation Center, Inc. All Rights Reserved.
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "qemu/osdep.h"
+#include "exec/address-spaces.h"
+#include "hw/char/pl011.h"
+#include "hw/core/sysbus-fdt.h"
+#include "hw/hexagon/hexagon.h"
+#include "hw/hexagon/virt.h"
+#include "hw/loader.h"
+#include "hw/qdev-properties.h"
+#include "hw/register.h"
+#include "qemu/error-report.h"
+#include "qemu/guest-random.h"
+#include "qemu/units.h"
+#include "elf.h"
+#include "machine_cfg_v68n_1024.h.inc"
+#include "system/device_tree.h"
+#include "system/reset.h"
+#include "system/system.h"
+#include <libfdt.h>
+
+static const int VIRTIO_DEV_COUNT = 2;
+
+static const MemMapEntry base_memmap[] = {
+    [VIRT_UART0] = { 0x10000000, 0x00000200 },
+    [VIRT_MMIO] = { 0x11000000, 0x1000000, },
+    [VIRT_GPT] = { 0xab000000, 0x00001000 },
+    [VIRT_FDT] = { 0x99900000, 0x00000200 },
+};
+
+static const int irqmap[] = {
+    [VIRT_MMIO] = 18, /* ...to 18 + VIRTIO_DEV_COUNT - 1 */
+    [VIRT_GPT] = 12,
+    [VIRT_UART0] = 15,
+    [VIRT_QTMR0] = 2,
+    [VIRT_QTMR1] = 4,
+};
+
+
+static void create_fdt(HexagonVirtMachineState *vms)
+{
+    MachineState *ms = MACHINE(vms);
+    void *fdt = create_device_tree(&vms->fdt_size);
+
+    if (!fdt) {
+        error_report("create_device_tree() failed");
+        exit(1);
+    }
+
+    ms->fdt = fdt;
+
+    qemu_fdt_setprop_string(fdt, "/", "compatible", "linux,hexagon-virt");
+    qemu_fdt_setprop_cell(fdt, "/", "#address-cells", 0x2);
+    qemu_fdt_setprop_cell(fdt, "/", "#size-cells", 0x1);
+    qemu_fdt_setprop_string(fdt, "/", "model", "linux,hexagon-virt");
+
+    qemu_fdt_setprop_string(fdt, "/", "model", "hexagon-virt,qemu");
+    qemu_fdt_setprop_string(fdt, "/", "compatible", "qcom,sm8150");
+
+    qemu_fdt_add_subnode(fdt, "/soc");
+    qemu_fdt_setprop_cell(fdt, "/soc", "#address-cells", 0x2);
+    qemu_fdt_setprop_cell(fdt, "/soc", "#size-cells", 0x1);
+    qemu_fdt_setprop(fdt, "/soc", "ranges", NULL, 0);
+
+    qemu_fdt_add_subnode(fdt, "/chosen");
+
+    uint8_t rng_seed[32];
+    qemu_guest_getrandom_nofail(rng_seed, sizeof(rng_seed));
+    qemu_fdt_setprop(fdt, "/chosen", "rng-seed", rng_seed, sizeof(rng_seed));
+}
+
+static void fdt_add_hvx(HexagonVirtMachineState *vms,
+                        const hexagon_machine_config *m_cfg, Error **errp)
+{
+    const MachineState *ms = MACHINE(vms);
+    uint32_t vtcm_size_bytes = m_cfg->cfgtable.vtcm_size_kb * 1024;
+    if (vtcm_size_bytes > 0) {
+        memory_region_init_ram(&vms->vtcm, NULL, "vtcm.ram", vtcm_size_bytes,
+                               errp);
+        memory_region_add_subregion(vms->sys, m_cfg->cfgtable.vtcm_base << 16,
+                                    &vms->vtcm);
+
+        qemu_fdt_add_subnode(ms->fdt, "/soc/vtcm");
+        qemu_fdt_setprop_string(ms->fdt, "/soc/vtcm", "compatible",
+                                "qcom,hexagon_vtcm");
+
+        assert(sizeof(m_cfg->cfgtable.vtcm_base) == sizeof(uint32_t));
+        qemu_fdt_setprop_cells(ms->fdt, "/soc/vtcm", "reg", 0,
+                               m_cfg->cfgtable.vtcm_base << 16,
+                               vtcm_size_bytes);
+    }
+
+    if (m_cfg->cfgtable.ext_contexts > 0) {
+        qemu_fdt_add_subnode(ms->fdt, "/soc/hvx");
+        qemu_fdt_setprop_string(ms->fdt, "/soc/hvx", "compatible",
+                                "qcom,hexagon-hvx");
+        qemu_fdt_setprop_cells(ms->fdt, "/soc/hvx", "qcom,hvx-max-ctxts",
+                               m_cfg->cfgtable.ext_contexts);
+        qemu_fdt_setprop_cells(ms->fdt, "/soc/hvx", "qcom,hvx-vlength",
+                               m_cfg->cfgtable.hvx_vec_log_length);
+    }
+}
+
+static int32_t irq_hvm_ic_phandle = -1;
+static void fdt_add_hvm_pic_node(HexagonVirtMachineState *vms,
+                                 const hexagon_machine_config *m_cfg)
+{
+    MachineState *ms = MACHINE(vms);
+    irq_hvm_ic_phandle = qemu_fdt_alloc_phandle(ms->fdt);
+
+    qemu_fdt_setprop_cell(ms->fdt, "/soc", "interrupt-parent",
+                          irq_hvm_ic_phandle);
+
+    qemu_fdt_add_subnode(ms->fdt, "/soc/interrupt-controller");
+    qemu_fdt_setprop_cell(ms->fdt, "/soc/interrupt-controller",
+                          "#address-cells", 2);
+    qemu_fdt_setprop_cell(ms->fdt, "/soc/interrupt-controller",
+                          "#interrupt-cells", 2);
+    qemu_fdt_setprop_string(ms->fdt, "/soc/interrupt-controller", "compatible",
+                            "qcom,h2-pic,hvm-pic");
+    qemu_fdt_setprop(ms->fdt, "/soc/interrupt-controller",
+                     "interrupt-controller", NULL, 0);
+    qemu_fdt_setprop_cell(ms->fdt, "/soc/interrupt-controller", "phandle",
+                          irq_hvm_ic_phandle);
+
+    sysbus_mmio_map(SYS_BUS_DEVICE(vms->l2vic), 1,
+                    m_cfg->cfgtable.fastl2vic_base << 16);
+}
+
+
+static void fdt_add_gpt_node(HexagonVirtMachineState *vms)
+{
+    g_autofree char *name = NULL;
+    MachineState *ms = MACHINE(vms);
+
+    name = g_strdup_printf("/soc/gpt@%" PRIx64,
+                           (int64_t)base_memmap[VIRT_GPT].base);
+    qemu_fdt_add_subnode(ms->fdt, name);
+    qemu_fdt_setprop_string(ms->fdt, name, "compatible",
+                            "qcom,h2-timer,hvm-timer");
+    qemu_fdt_setprop_cells(ms->fdt, name, "interrupts", irqmap[VIRT_GPT], 0);
+    qemu_fdt_setprop_cells(ms->fdt, name, "reg", 0x0,
+                           base_memmap[VIRT_GPT].base,
+                           base_memmap[VIRT_GPT].size);
+}
+
+static int32_t clock_phandle = -1;
+static void fdt_add_clocks(const HexagonVirtMachineState *vms)
+{
+    MachineState *ms = MACHINE(vms);
+    clock_phandle = qemu_fdt_alloc_phandle(ms->fdt);
+    qemu_fdt_add_subnode(ms->fdt, "/apb-pclk");
+    qemu_fdt_setprop_string(ms->fdt, "/apb-pclk", "compatible", "fixed-clock");
+    qemu_fdt_setprop_cell(ms->fdt, "/apb-pclk", "#clock-cells", 0x0);
+    qemu_fdt_setprop_cell(ms->fdt, "/apb-pclk", "clock-frequency", 24000000);
+    qemu_fdt_setprop_string(ms->fdt, "/apb-pclk", "clock-output-names",
+                            "clk24mhz");
+    qemu_fdt_setprop_cell(ms->fdt, "/apb-pclk", "phandle", clock_phandle);
+}
+
+static void fdt_add_uart(const HexagonVirtMachineState *vms, int uart)
+{
+    char *nodename;
+    hwaddr base = base_memmap[uart].base;
+    hwaddr size = base_memmap[uart].size;
+    assert(uart == 0);
+    int irq = irqmap[VIRT_UART0 + uart];
+    const char compat[] = "arm,pl011\0arm,primecell";
+    const char clocknames[] = "uartclk\0apb_pclk";
+    MachineState *ms = MACHINE(vms);
+
+    pl011_create(base, qdev_get_gpio_in(vms->l2vic, irq), serial_hd(0));
+
+    nodename = g_strdup_printf("/pl011@%" PRIx64, base);
+    qemu_fdt_add_subnode(ms->fdt, nodename);
+
+    /* Note that we can't use setprop_string because of the embedded NUL */
+    qemu_fdt_setprop(ms->fdt, nodename, "compatible", compat, sizeof(compat));
+    qemu_fdt_setprop_cells(ms->fdt, nodename, "reg", 0, base, size);
+    qemu_fdt_setprop_cells(ms->fdt, nodename, "interrupts", 32 + irq, 0);
+    qemu_fdt_setprop_cells(ms->fdt, nodename, "clocks", clock_phandle,
+                           clock_phandle);
+    qemu_fdt_setprop(ms->fdt, nodename, "clock-names", clocknames,
+                     sizeof(clocknames));
+    qemu_fdt_setprop_cell(ms->fdt, nodename, "interrupt-parent",
+                          irq_hvm_ic_phandle);
+
+    qemu_fdt_setprop_string(ms->fdt, "/chosen", "stdout-path", nodename);
+    qemu_fdt_add_subnode(ms->fdt, "/aliases");
+    qemu_fdt_setprop_string(ms->fdt, "/aliases", "serial0", nodename);
+
+    g_free(nodename);
+}
+
+static void fdt_add_cpu_nodes(const HexagonVirtMachineState *vms)
+{
+    MachineState *ms = MACHINE(vms);
+    qemu_fdt_add_subnode(ms->fdt, "/cpus");
+    qemu_fdt_setprop_cell(ms->fdt, "/cpus", "#address-cells", 0x1);
+    qemu_fdt_setprop_cell(ms->fdt, "/cpus", "#size-cells", 0x0);
+
+    /* cpu nodes */
+    for (int num = ms->smp.cpus - 1; num >= 0; num--) {
+        char *nodename = g_strdup_printf("/cpus/cpu@%d", num);
+        qemu_fdt_add_subnode(ms->fdt, nodename);
+        qemu_fdt_setprop_string(ms->fdt, nodename, "device_type", "cpu");
+        qemu_fdt_setprop_cell(ms->fdt, nodename, "reg", num);
+        qemu_fdt_setprop_cell(ms->fdt, nodename, "phandle",
+                              qemu_fdt_alloc_phandle(ms->fdt));
+        g_free(nodename);
+    }
+}
+
+
+static void fdt_add_virtio_devices(const HexagonVirtMachineState *vms)
+{
+    MachineState *ms = MACHINE(vms);
+    /* VirtIO MMIO devices */
+    for (int i = 0; i < VIRTIO_DEV_COUNT; i++) {
+        char *nodename;
+        int irq = irqmap[VIRT_MMIO] + i;
+        size_t size = base_memmap[VIRT_MMIO].size;
+        hwaddr base = base_memmap[VIRT_MMIO].base + i * size;
+
+        nodename = g_strdup_printf("/virtio_mmio@%" PRIx64, base);
+        qemu_fdt_add_subnode(ms->fdt, nodename);
+        qemu_fdt_setprop_string(ms->fdt, nodename, "compatible", "virtio,mmio");
+        qemu_fdt_setprop_sized_cells(ms->fdt, nodename, "reg", 2, base, 1,
+                                     size);
+        qemu_fdt_setprop_cells(ms->fdt, nodename, "interrupts", irq, 0);
+        qemu_fdt_setprop_cell(ms->fdt, nodename, "interrupt-parent",
+                              irq_hvm_ic_phandle);
+
+        sysbus_create_simple(
+            "virtio-mmio", base,
+            qdev_get_gpio_in(vms->l2vic, irqmap[VIRT_MMIO] + i));
+
+        g_free(nodename);
+    }
+}
+
+static void virt_instance_init(Object *obj)
+{
+    HexagonVirtMachineState *vms = HEXAGON_VIRT_MACHINE(obj);
+
+    create_fdt(vms);
+}
+
+void hexagon_load_fdt(const HexagonVirtMachineState *vms)
+{
+    MachineState *ms = MACHINE(vms);
+    hwaddr fdt_addr = base_memmap[VIRT_FDT].base;
+    uint32_t fdtsize = vms->fdt_size;
+
+    /* copy in the device tree */
+    qemu_fdt_dumpdtb(ms->fdt, fdtsize);
+
+    rom_add_blob_fixed_as("fdt", ms->fdt, fdtsize, fdt_addr,
+                          &address_space_memory);
+    qemu_register_reset_nosnapshotload(
+        qemu_fdt_randomize_seeds,
+        rom_ptr_for_as(&address_space_memory, fdt_addr, fdtsize));
+}
+
+static uint64_t load_kernel(const HexagonVirtMachineState *vms)
+{
+    MachineState *ms = MACHINE(vms);
+    uint64_t entry = 0;
+    if (load_elf_ram_sym(ms->kernel_filename, NULL, NULL, NULL, NULL, &entry,
+                         NULL, NULL, 0, EM_HEXAGON, 0, 0, &address_space_memory,
+                         false, NULL) > 0) {
+        return entry;
+    }
+    error_report("error loading '%s'", ms->kernel_filename);
+    exit(1);
+}
+
+static void do_cpu_reset(void *opaque)
+{
+    HexagonCPU *cpu = opaque;
+    CPUState *cs = CPU(cpu);
+    cpu_reset(cs);
+}
+
+static void virt_init(MachineState *ms)
+{
+    HexagonVirtMachineState *vms = HEXAGON_VIRT_MACHINE(ms);
+    Error **errp = NULL;
+    const hexagon_machine_config *m_cfg = &v68n_1024;
+
+    qemu_fdt_setprop_string(ms->fdt, "/chosen", "bootargs", ms->kernel_cmdline);
+
+    vms->sys = get_system_memory();
+
+    memory_region_init_ram(&vms->ram, NULL, "ddr.ram", ms->ram_size, errp);
+    memory_region_add_subregion(vms->sys, 0x0, &vms->ram);
+
+    if (m_cfg->l2tcm_size) {
+        memory_region_init_ram(&vms->tcm, NULL, "tcm.ram", m_cfg->l2tcm_size,
+                               errp);
+        memory_region_add_subregion(vms->sys, m_cfg->cfgtable.l2tcm_base << 16,
+                                    &vms->tcm);
+    }
+
+    memory_region_init_rom(&vms->cfgtable, NULL, "config_table.rom",
+                           sizeof(m_cfg->cfgtable), errp);
+    memory_region_add_subregion(vms->sys, m_cfg->cfgbase, &vms->cfgtable);
+    fdt_add_hvx(vms, m_cfg, errp);
+    const char *cpu_model = ms->cpu_type;
+
+    if (!cpu_model) {
+        cpu_model = HEXAGON_CPU_TYPE_NAME("v73");
+    }
+
+    HexagonCPU *cpu_0 = NULL;
+    for (int i = 0; i < ms->smp.cpus; i++) {
+        HexagonCPU *cpu = HEXAGON_CPU(object_new(ms->cpu_type));
+        qemu_register_reset(do_cpu_reset, cpu);
+
+        if (i == 0) {
+            cpu_0 = cpu;
+            if (ms->kernel_filename) {
+                uint64_t entry = load_kernel(vms);
+
+                qdev_prop_set_uint32(DEVICE(cpu_0), "exec-start-addr", entry);
+            }
+        }
+        qdev_prop_set_bit(DEVICE(cpu), "start-powered-off", (i != 0));
+        qdev_prop_set_uint32(DEVICE(cpu), "hvx-contexts",
+                             m_cfg->cfgtable.ext_contexts);
+        qdev_prop_set_uint32(DEVICE(cpu), "config-table-addr", m_cfg->cfgbase);
+        qdev_prop_set_uint32(DEVICE(cpu), "l2vic-base-addr", m_cfg->l2vic_base);
+        qdev_prop_set_uint32(DEVICE(cpu), "jtlb-entries",
+                             m_cfg->cfgtable.jtlb_size_entries);
+
+        if (!qdev_realize_and_unref(DEVICE(cpu), NULL, errp)) {
+            return;
+        }
+    }
+    vms->l2vic = sysbus_create_varargs(
+        "l2vic", m_cfg->l2vic_base, qdev_get_gpio_in(DEVICE(cpu_0), 0),
+        qdev_get_gpio_in(DEVICE(cpu_0), 1), qdev_get_gpio_in(DEVICE(cpu_0), 2),
+        qdev_get_gpio_in(DEVICE(cpu_0), 3), qdev_get_gpio_in(DEVICE(cpu_0), 4),
+        qdev_get_gpio_in(DEVICE(cpu_0), 5), qdev_get_gpio_in(DEVICE(cpu_0), 6),
+        qdev_get_gpio_in(DEVICE(cpu_0), 7), NULL);
+
+    fdt_add_hvm_pic_node(vms, m_cfg);
+    fdt_add_virtio_devices(vms);
+    fdt_add_cpu_nodes(vms);
+    fdt_add_clocks(vms);
+    fdt_add_uart(vms, VIRT_UART0);
+    fdt_add_gpt_node(vms);
+
+    rom_add_blob_fixed_as("config_table.rom", &m_cfg->cfgtable,
+                          sizeof(m_cfg->cfgtable), m_cfg->cfgbase,
+                          &address_space_memory);
+
+
+    hexagon_load_fdt(vms);
+}
+
+
+static void virt_class_init(ObjectClass *oc, void *data)
+{
+    MachineClass *mc = MACHINE_CLASS(oc);
+
+    mc->init = virt_init;
+    mc->default_cpu_type = HEXAGON_CPU_TYPE_NAME("v73");
+    mc->default_ram_size = 4 * GiB;
+    mc->max_cpus = 8;
+    mc->default_cpus = 8;
+    mc->is_default = false;
+    mc->default_kernel_irqchip_split = false;
+    mc->block_default_type = IF_VIRTIO;
+    mc->default_boot_order = NULL;
+    mc->no_cdrom = 1;
+    mc->numa_mem_supported = false;
+    mc->default_nic = "virtio-mmio-bus";
+}
+
+
+static const TypeInfo virt_machine_types[] = { {
+    .name = TYPE_HEXAGON_VIRT_MACHINE,
+    .parent = TYPE_MACHINE,
+    .instance_size = sizeof(HexagonVirtMachineState),
+    .class_init = virt_class_init,
+    .instance_init = virt_instance_init,
+} };
+
+DEFINE_TYPES(virt_machine_types)
diff --git a/target/hexagon/cpu.c b/target/hexagon/cpu.c
index 34940e9a84..7f8f716d6d 100644
--- a/target/hexagon/cpu.c
+++ b/target/hexagon/cpu.c
@@ -1,5 +1,5 @@ 
 /*
- *  Copyright(c) 2019-2023 Qualcomm Innovation Center, Inc. All Rights Reserved.
+ *  Copyright(c) 2019-2025 Qualcomm Innovation Center, Inc. All Rights Reserved.
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
diff --git a/hw/hexagon/Kconfig b/hw/hexagon/Kconfig
index 3fc14756e6..f3f0115731 100644
--- a/hw/hexagon/Kconfig
+++ b/hw/hexagon/Kconfig
@@ -4,3 +4,11 @@  config HEX_DSP
     depends on HEXAGON && TCG
     imply PTIMER
     select L2VIC  # Vector PIC
+
+config HEX_VIRT
+    bool
+    default y
+    depends on HEX_DSP && FDT
+    select DEVICE_TREE
+    select VIRTIO_MMIO
+    select PL011
diff --git a/hw/hexagon/meson.build b/hw/hexagon/meson.build
index 2ef3dbcd34..649ad6dc02 100644
--- a/hw/hexagon/meson.build
+++ b/hw/hexagon/meson.build
@@ -3,3 +3,5 @@  hexagon_ss.add(when: 'CONFIG_HEX_DSP', if_true: files('hexagon_dsp.c',))
 
 hw_arch += {'hexagon': hexagon_ss}
 
+hexagon_ss.add(when: 'CONFIG_HEX_VIRT', if_true: files('virt.c',))
+