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authorCédric Le Goater <clg@kaod.org>2019-03-07 23:35:44 +0100
committerDavid Gibson <david@gibson.dropbear.id.au>2019-03-12 14:33:04 +1100
commit5dad902ce09877a97a6f32e5f6c75b4f8506bd73 (patch)
treee17c6171757a39c2072a4b3909b9c77dbf5150ac /hw
parent90ef386c74b1b2c485b69a1bdb24895bebd45502 (diff)
ppc/pnv: POWER9 XSCOM quad support
The POWER9 processor does not support per-core frequency control. The cores are arranged in groups of four, along with their respective L2 and L3 caches, into a structure known as a Quad. The frequency must be managed at the Quad level. Provide a basic Quad model to fake the settings done by the firmware on the Non-Cacheable Unit (NCU). Each core pair (EX) needs a special BAR setting for the TIMA area of XIVE because it resides on the same address on all chips. Signed-off-by: Cédric Le Goater <clg@kaod.org> Message-Id: <20190307223548.20516-12-clg@kaod.org> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Diffstat (limited to 'hw')
-rw-r--r--hw/ppc/pnv.c38
-rw-r--r--hw/ppc/pnv_core.c87
2 files changed, 124 insertions, 1 deletions
diff --git a/hw/ppc/pnv.c b/hw/ppc/pnv.c
index 1559a73323..e68d419203 100644
--- a/hw/ppc/pnv.c
+++ b/hw/ppc/pnv.c
@@ -963,6 +963,36 @@ static void pnv_chip_power9_instance_init(Object *obj)
OBJECT(&chip9->psi), &error_abort);
}
+static void pnv_chip_quad_realize(Pnv9Chip *chip9, Error **errp)
+{
+ PnvChip *chip = PNV_CHIP(chip9);
+ const char *typename = pnv_chip_core_typename(chip);
+ size_t typesize = object_type_get_instance_size(typename);
+ int i;
+
+ chip9->nr_quads = DIV_ROUND_UP(chip->nr_cores, 4);
+ chip9->quads = g_new0(PnvQuad, chip9->nr_quads);
+
+ for (i = 0; i < chip9->nr_quads; i++) {
+ char eq_name[32];
+ PnvQuad *eq = &chip9->quads[i];
+ PnvCore *pnv_core = PNV_CORE(chip->cores + (i * 4) * typesize);
+ int core_id = CPU_CORE(pnv_core)->core_id;
+
+ object_initialize(eq, sizeof(*eq), TYPE_PNV_QUAD);
+ snprintf(eq_name, sizeof(eq_name), "eq[%d]", core_id);
+
+ object_property_add_child(OBJECT(chip), eq_name, OBJECT(eq),
+ &error_fatal);
+ object_property_set_int(OBJECT(eq), core_id, "id", &error_fatal);
+ object_property_set_bool(OBJECT(eq), true, "realized", &error_fatal);
+ object_unref(OBJECT(eq));
+
+ pnv_xscom_add_subregion(chip, PNV9_XSCOM_EQ_BASE(eq->id),
+ &eq->xscom_regs);
+ }
+}
+
static void pnv_chip_power9_realize(DeviceState *dev, Error **errp)
{
PnvChipClass *pcc = PNV_CHIP_GET_CLASS(dev);
@@ -977,6 +1007,12 @@ static void pnv_chip_power9_realize(DeviceState *dev, Error **errp)
return;
}
+ pnv_chip_quad_realize(chip9, &local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
+ return;
+ }
+
/* XIVE interrupt controller (POWER9) */
object_property_set_int(OBJECT(&chip9->xive), PNV9_XIVE_IC_BASE(chip),
"ic-bar", &error_fatal);
@@ -1135,7 +1171,7 @@ static void pnv_chip_core_realize(PnvChip *chip, Error **errp)
if (!pnv_chip_is_power9(chip)) {
xscom_core_base = PNV_XSCOM_EX_BASE(core_hwid);
} else {
- xscom_core_base = PNV_XSCOM_P9_EC_BASE(core_hwid);
+ xscom_core_base = PNV9_XSCOM_EC_BASE(core_hwid);
}
pnv_xscom_add_subregion(chip, xscom_core_base,
diff --git a/hw/ppc/pnv_core.c b/hw/ppc/pnv_core.c
index 171474e080..5feeed6bc4 100644
--- a/hw/ppc/pnv_core.c
+++ b/hw/ppc/pnv_core.c
@@ -327,3 +327,90 @@ static const TypeInfo pnv_core_infos[] = {
};
DEFINE_TYPES(pnv_core_infos)
+
+/*
+ * POWER9 Quads
+ */
+
+#define P9X_EX_NCU_SPEC_BAR 0x11010
+
+static uint64_t pnv_quad_xscom_read(void *opaque, hwaddr addr,
+ unsigned int width)
+{
+ uint32_t offset = addr >> 3;
+ uint64_t val = -1;
+
+ switch (offset) {
+ case P9X_EX_NCU_SPEC_BAR:
+ case P9X_EX_NCU_SPEC_BAR + 0x400: /* Second EX */
+ val = 0;
+ break;
+ default:
+ qemu_log_mask(LOG_UNIMP, "%s: writing @0x%08x\n", __func__,
+ offset);
+ }
+
+ return val;
+}
+
+static void pnv_quad_xscom_write(void *opaque, hwaddr addr, uint64_t val,
+ unsigned int width)
+{
+ uint32_t offset = addr >> 3;
+
+ switch (offset) {
+ case P9X_EX_NCU_SPEC_BAR:
+ case P9X_EX_NCU_SPEC_BAR + 0x400: /* Second EX */
+ break;
+ default:
+ qemu_log_mask(LOG_UNIMP, "%s: writing @0x%08x\n", __func__,
+ offset);
+ }
+}
+
+static const MemoryRegionOps pnv_quad_xscom_ops = {
+ .read = pnv_quad_xscom_read,
+ .write = pnv_quad_xscom_write,
+ .valid.min_access_size = 8,
+ .valid.max_access_size = 8,
+ .impl.min_access_size = 8,
+ .impl.max_access_size = 8,
+ .endianness = DEVICE_BIG_ENDIAN,
+};
+
+static void pnv_quad_realize(DeviceState *dev, Error **errp)
+{
+ PnvQuad *eq = PNV_QUAD(dev);
+ char name[32];
+
+ snprintf(name, sizeof(name), "xscom-quad.%d", eq->id);
+ pnv_xscom_region_init(&eq->xscom_regs, OBJECT(dev), &pnv_quad_xscom_ops,
+ eq, name, PNV9_XSCOM_EQ_SIZE);
+}
+
+static Property pnv_quad_properties[] = {
+ DEFINE_PROP_UINT32("id", PnvQuad, id, 0),
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void pnv_quad_class_init(ObjectClass *oc, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(oc);
+
+ dc->realize = pnv_quad_realize;
+ dc->props = pnv_quad_properties;
+}
+
+static const TypeInfo pnv_quad_info = {
+ .name = TYPE_PNV_QUAD,
+ .parent = TYPE_DEVICE,
+ .instance_size = sizeof(PnvQuad),
+ .class_init = pnv_quad_class_init,
+};
+
+static void pnv_core_register_types(void)
+{
+ type_register_static(&pnv_quad_info);
+}
+
+type_init(pnv_core_register_types)