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ppc/pnv: Instantiate cores separately

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Allocating a big void * array to store multiple objects isn't a
recommended practice for various reasons:
 - no compile time type checking
 - potential dangling pointers if a reference on an individual is
  taken and the array is freed later on
 - duplicate boiler plate everywhere the array is browsed through

Allocate an array of pointers and populate it instead.

Signed-off-by: Greg Kurz <groug@kaod.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20191125065820.927-4-clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Greg Kurz 2019-11-25 07:58:03 +01:00 committed by David Gibson
parent f87dae18d8
commit 4fa28f2390
2 changed files with 13 additions and 19 deletions
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30
hw/ppc/pnv.c
View file

@ -280,14 +280,12 @@ static void pnv_dt_icp(PnvChip *chip, void *fdt, uint32_t pir,
static void pnv_chip_power8_dt_populate(PnvChip *chip, void *fdt)
{
const char *typename = pnv_chip_core_typename(chip);
size_t typesize = object_type_get_instance_size(typename);
int i;
pnv_dt_xscom(chip, fdt, 0);
for (i = 0; i < chip->nr_cores; i++) {
PnvCore *pnv_core = PNV_CORE(chip->cores + i * typesize);
PnvCore *pnv_core = chip->cores[i];
pnv_dt_core(chip, pnv_core, fdt);
@ -302,14 +300,12 @@ static void pnv_chip_power8_dt_populate(PnvChip *chip, void *fdt)
static void pnv_chip_power9_dt_populate(PnvChip *chip, void *fdt)
{
const char *typename = pnv_chip_core_typename(chip);
size_t typesize = object_type_get_instance_size(typename);
int i;
pnv_dt_xscom(chip, fdt, 0);
for (i = 0; i < chip->nr_cores; i++) {
PnvCore *pnv_core = PNV_CORE(chip->cores + i * typesize);
PnvCore *pnv_core = chip->cores[i];
pnv_dt_core(chip, pnv_core, fdt);
}
@ -913,8 +909,6 @@ static void pnv_chip_icp_realize(Pnv8Chip *chip8, Error **errp)
{
PnvChip *chip = PNV_CHIP(chip8);
PnvChipClass *pcc = PNV_CHIP_GET_CLASS(chip);
const char *typename = pnv_chip_core_typename(chip);
size_t typesize = object_type_get_instance_size(typename);
int i, j;
char *name;
XICSFabric *xi = XICS_FABRIC(qdev_get_machine());
@ -928,7 +922,7 @@ static void pnv_chip_icp_realize(Pnv8Chip *chip8, Error **errp)
/* Map the ICP registers for each thread */
for (i = 0; i < chip->nr_cores; i++) {
PnvCore *pnv_core = PNV_CORE(chip->cores + i * typesize);
PnvCore *pnv_core = chip->cores[i];
int core_hwid = CPU_CORE(pnv_core)->core_id;
for (j = 0; j < CPU_CORE(pnv_core)->nr_threads; j++) {
@ -1108,8 +1102,6 @@ static void pnv_chip_power9_instance_init(Object *obj)
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);
@ -1118,7 +1110,7 @@ static void pnv_chip_quad_realize(Pnv9Chip *chip9, Error **errp)
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);
PnvCore *pnv_core = chip->cores[i * 4];
int core_id = CPU_CORE(pnv_core)->core_id;
snprintf(eq_name, sizeof(eq_name), "eq[%d]", core_id);
@ -1290,7 +1282,6 @@ static void pnv_chip_core_realize(PnvChip *chip, Error **errp)
Error *error = NULL;
PnvChipClass *pcc = PNV_CHIP_GET_CLASS(chip);
const char *typename = pnv_chip_core_typename(chip);
size_t typesize = object_type_get_instance_size(typename);
int i, core_hwid;
if (!object_class_by_name(typename)) {
@ -1305,21 +1296,24 @@ static void pnv_chip_core_realize(PnvChip *chip, Error **errp)
return;
}
chip->cores = g_malloc0(typesize * chip->nr_cores);
chip->cores = g_new0(PnvCore *, chip->nr_cores);
for (i = 0, core_hwid = 0; (core_hwid < sizeof(chip->cores_mask) * 8)
&& (i < chip->nr_cores); core_hwid++) {
char core_name[32];
void *pnv_core = chip->cores + i * typesize;
PnvCore *pnv_core;
uint64_t xscom_core_base;
if (!(chip->cores_mask & (1ull << core_hwid))) {
continue;
}
pnv_core = PNV_CORE(object_new(typename));
snprintf(core_name, sizeof(core_name), "core[%d]", core_hwid);
object_initialize_child(OBJECT(chip), core_name, pnv_core, typesize,
typename, &error_fatal, NULL);
object_property_add_child(OBJECT(chip), core_name, OBJECT(pnv_core),
&error_abort);
chip->cores[i] = pnv_core;
object_property_set_int(OBJECT(pnv_core), ms->smp.threads, "nr-threads",
&error_fatal);
object_property_set_int(OBJECT(pnv_core), core_hwid,
@ -1340,7 +1334,7 @@ static void pnv_chip_core_realize(PnvChip *chip, Error **errp)
}
pnv_xscom_add_subregion(chip, xscom_core_base,
&PNV_CORE(pnv_core)->xscom_regs);
&pnv_core->xscom_regs);
i++;
}
}

2
include/hw/ppc/pnv.h
View file

@ -56,7 +56,7 @@ typedef struct PnvChip {
uint32_t nr_cores;
uint64_t cores_mask;
void *cores;
PnvCore **cores;
MemoryRegion xscom_mmio;
MemoryRegion xscom;