qemu/tests/pnv-xscom-test.c
David Gibson eaa477ca4e powernv: Don't test POWER9 CPU yet
A couple of tests for the work-in-progress 'powernv' machine type attempt
to test on POWER9 CPUs.  However the POWER9 CPU support is incomplete and
this doesn't really work.  In particular the firmware image we have
currently assumes the presence of the SDR1 register, which no longer exists
on POWER9.  We only got away with this so far, because of a different bug
which added SDR1 to POWER9 even though it shouldn't be there.

For now, remove POWER9 testing of powernv, POWER8 testing will do for now
until the POWER9 support is more complete.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
2017-03-03 11:30:59 +11:00

144 lines
3.6 KiB
C

/*
* QTest testcase for PowerNV XSCOM bus
*
* Copyright (c) 2016, IBM Corporation.
*
* This work is licensed under the terms of the GNU GPL, version 2 or
* later. See the COPYING file in the top-level directory.
*/
#include "qemu/osdep.h"
#include "libqtest.h"
typedef enum PnvChipType {
PNV_CHIP_POWER8E, /* AKA Murano (default) */
PNV_CHIP_POWER8, /* AKA Venice */
PNV_CHIP_POWER8NVL, /* AKA Naples */
PNV_CHIP_POWER9, /* AKA Nimbus */
} PnvChipType;
typedef struct PnvChip {
PnvChipType chip_type;
const char *cpu_model;
uint64_t xscom_base;
uint64_t xscom_core_base;
uint64_t cfam_id;
uint32_t first_core;
} PnvChip;
static const PnvChip pnv_chips[] = {
{
.chip_type = PNV_CHIP_POWER8,
.cpu_model = "POWER8",
.xscom_base = 0x0003fc0000000000ull,
.xscom_core_base = 0x10000000ull,
.cfam_id = 0x220ea04980000000ull,
.first_core = 0x1,
}, {
.chip_type = PNV_CHIP_POWER8NVL,
.cpu_model = "POWER8NVL",
.xscom_base = 0x0003fc0000000000ull,
.xscom_core_base = 0x10000000ull,
.cfam_id = 0x120d304980000000ull,
.first_core = 0x1,
},
#if 0 /* POWER9 support is not ready yet */
{
.chip_type = PNV_CHIP_POWER9,
.cpu_model = "POWER9",
.xscom_base = 0x000603fc00000000ull,
.xscom_core_base = 0x0ull,
.cfam_id = 0x100d104980000000ull,
.first_core = 0x20,
},
#endif
};
static uint64_t pnv_xscom_addr(const PnvChip *chip, uint32_t pcba)
{
uint64_t addr = chip->xscom_base;
if (chip->chip_type == PNV_CHIP_POWER9) {
addr |= ((uint64_t) pcba << 3);
} else {
addr |= (((uint64_t) pcba << 4) & ~0xffull) |
(((uint64_t) pcba << 3) & 0x78);
}
return addr;
}
static uint64_t pnv_xscom_read(const PnvChip *chip, uint32_t pcba)
{
return readq(pnv_xscom_addr(chip, pcba));
}
static void test_xscom_cfam_id(const PnvChip *chip)
{
uint64_t f000f = pnv_xscom_read(chip, 0xf000f);
g_assert_cmphex(f000f, ==, chip->cfam_id);
}
static void test_cfam_id(const void *data)
{
char *args;
const PnvChip *chip = data;
args = g_strdup_printf("-M powernv,accel=tcg -cpu %s", chip->cpu_model);
qtest_start(args);
test_xscom_cfam_id(chip);
qtest_quit(global_qtest);
g_free(args);
}
#define PNV_XSCOM_EX_CORE_BASE(chip, i) \
((chip)->xscom_core_base | (((uint64_t)i) << 24))
#define PNV_XSCOM_EX_DTS_RESULT0 0x50000
static void test_xscom_core(const PnvChip *chip)
{
uint32_t first_core_dts0 =
PNV_XSCOM_EX_CORE_BASE(chip, chip->first_core) |
PNV_XSCOM_EX_DTS_RESULT0;
uint64_t dts0 = pnv_xscom_read(chip, first_core_dts0);
g_assert_cmphex(dts0, ==, 0x26f024f023f0000ull);
}
static void test_core(const void *data)
{
char *args;
const PnvChip *chip = data;
args = g_strdup_printf("-M powernv,accel=tcg -cpu %s", chip->cpu_model);
qtest_start(args);
test_xscom_core(chip);
qtest_quit(global_qtest);
g_free(args);
}
static void add_test(const char *name, void (*test)(const void *data))
{
int i;
for (i = 0; i < ARRAY_SIZE(pnv_chips); i++) {
char *tname = g_strdup_printf("pnv-xscom/%s/%s", name,
pnv_chips[i].cpu_model);
qtest_add_data_func(tname, &pnv_chips[i], test);
g_free(tname);
}
}
int main(int argc, char **argv)
{
g_test_init(&argc, &argv, NULL);
add_test("cfam_id", test_cfam_id);
add_test("core", test_core);
return g_test_run();
}