diff options
author | Cédric Le Goater <clg@kaod.org> | 2019-03-07 23:35:44 +0100 |
---|---|---|
committer | David Gibson <david@gibson.dropbear.id.au> | 2019-03-12 14:33:04 +1100 |
commit | 5dad902ce09877a97a6f32e5f6c75b4f8506bd73 (patch) | |
tree | e17c6171757a39c2072a4b3909b9c77dbf5150ac /hw | |
parent | 90ef386c74b1b2c485b69a1bdb24895bebd45502 (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.c | 38 | ||||
-rw-r--r-- | hw/ppc/pnv_core.c | 87 |
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) |