hw/arm/sbsa-ref: add ITS support in SBSA GIC

Create ITS as part of SBSA platform GIC initialization.

GIC ITS information is in DeviceTree so TF-A can pass it to EDK2.

Bumping platform version to 0.2 as this is important hardware change.

Signed-off-by: Shashi Mallela <shashi.mallela@linaro.org>
Signed-off-by: Marcin Juszkiewicz <marcin.juszkiewicz@linaro.org>
Message-id: 20230619170913.517373-2-marcin.juszkiewicz@linaro.org
Co-authored-by: Marcin Juszkiewicz <marcin.juszkiewicz@linaro.org>
Signed-off-by: Marcin Juszkiewicz <marcin.juszkiewicz@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

docs/system/arm/sbsa.rst

@@ -46,6 +46,9 @@ to be a complete compliant DT. It currently reports:
    - platform version
    - GIC addresses
 
+Platform version
+''''''''''''''''
+
 The platform version is only for informing platform firmware about
 what kind of ``sbsa-ref`` board it is running on. It is neither
 a QEMU versioned machine type nor a reflection of the level of the
@@ -54,3 +57,14 @@ SBSA/SystemReady SR support provided.
 The ``machine-version-major`` value is updated when changes breaking
 fw compatibility are introduced. The ``machine-version-minor`` value
 is updated when features are added that don't break fw compatibility.
+
+Platform version changes:
+
+0.0
+  Devicetree holds information about CPUs, memory and platform version.
+
+0.1
+  GIC information is present in devicetree.
+
+0.2
+  GIC ITS information is present in devicetree.

hw/arm/sbsa-ref.c

@@ -65,6 +65,7 @@ enum {
     SBSA_CPUPERIPHS,
     SBSA_GIC_DIST,
     SBSA_GIC_REDIST,
+    SBSA_GIC_ITS,
     SBSA_SECURE_EC,
     SBSA_GWDT_WS0,
     SBSA_GWDT_REFRESH,
@@ -108,6 +109,7 @@ static const MemMapEntry sbsa_ref_memmap[] = {
     [SBSA_CPUPERIPHS] =         { 0x40000000, 0x00040000 },
     [SBSA_GIC_DIST] =           { 0x40060000, 0x00010000 },
     [SBSA_GIC_REDIST] =         { 0x40080000, 0x04000000 },
+    [SBSA_GIC_ITS] =            { 0x44081000, 0x00020000 },
     [SBSA_SECURE_EC] =          { 0x50000000, 0x00001000 },
     [SBSA_GWDT_REFRESH] =       { 0x50010000, 0x00001000 },
     [SBSA_GWDT_CONTROL] =       { 0x50011000, 0x00001000 },
@@ -181,8 +183,15 @@ static void sbsa_fdt_add_gic_node(SBSAMachineState *sms)
                                  2, sbsa_ref_memmap[SBSA_GIC_REDIST].base,
                                  2, sbsa_ref_memmap[SBSA_GIC_REDIST].size);
 
+    nodename = g_strdup_printf("/intc/its");
+    qemu_fdt_add_subnode(sms->fdt, nodename);
+    qemu_fdt_setprop_sized_cells(sms->fdt, nodename, "reg",
+                                 2, sbsa_ref_memmap[SBSA_GIC_ITS].base,
+                                 2, sbsa_ref_memmap[SBSA_GIC_ITS].size);
+
     g_free(nodename);
 }
+
 /*
  * Firmware on this machine only uses ACPI table to load OS, these limited
  * device tree nodes are just to let firmware know the info which varies from
@@ -219,7 +228,7 @@ static void create_fdt(SBSAMachineState *sms)
      *                        fw compatibility.
      */
     qemu_fdt_setprop_cell(fdt, "/", "machine-version-major", 0);
-    qemu_fdt_setprop_cell(fdt, "/", "machine-version-minor", 1);
+    qemu_fdt_setprop_cell(fdt, "/", "machine-version-minor", 2);
 
     if (ms->numa_state->have_numa_distance) {
         int size = nb_numa_nodes * nb_numa_nodes * 3 * sizeof(uint32_t);
@@ -409,7 +418,20 @@ static void create_secure_ram(SBSAMachineState *sms,
     memory_region_add_subregion(secure_sysmem, base, secram);
 }
 
-static void create_gic(SBSAMachineState *sms)
+static void create_its(SBSAMachineState *sms)
+{
+    const char *itsclass = its_class_name();
+    DeviceState *dev;
+
+    dev = qdev_new(itsclass);
+
+    object_property_set_link(OBJECT(dev), "parent-gicv3", OBJECT(sms->gic),
+                             &error_abort);
+    sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
+    sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, sbsa_ref_memmap[SBSA_GIC_ITS].base);
+}
+
+static void create_gic(SBSAMachineState *sms, MemoryRegion *mem)
 {
     unsigned int smp_cpus = MACHINE(sms)->smp.cpus;
     SysBusDevice *gicbusdev;
@@ -436,6 +458,10 @@ static void create_gic(SBSAMachineState *sms)
     qdev_prop_set_uint32(sms->gic, "len-redist-region-count", 1);
     qdev_prop_set_uint32(sms->gic, "redist-region-count[0]", redist0_count);
 
+    object_property_set_link(OBJECT(sms->gic), "sysmem",
+                             OBJECT(mem), &error_fatal);
+    qdev_prop_set_bit(sms->gic, "has-lpi", true);
+
     gicbusdev = SYS_BUS_DEVICE(sms->gic);
     sysbus_realize_and_unref(gicbusdev, &error_fatal);
     sysbus_mmio_map(gicbusdev, 0, sbsa_ref_memmap[SBSA_GIC_DIST].base);
@@ -482,6 +508,7 @@ static void create_gic(SBSAMachineState *sms)
         sysbus_connect_irq(gicbusdev, i + 3 * smp_cpus,
                            qdev_get_gpio_in(cpudev, ARM_CPU_VFIQ));
     }
+    create_its(sms);
 }
 
 static void create_uart(const SBSAMachineState *sms, int uart,
@@ -788,7 +815,7 @@ static void sbsa_ref_init(MachineState *machine)
 
     create_secure_ram(sms, secure_sysmem);
 
-    create_gic(sms);
+    create_gic(sms, sysmem);
 
     create_uart(sms, SBSA_UART, sysmem, serial_hd(0));
     create_uart(sms, SBSA_SECURE_UART, secure_sysmem, serial_hd(1));