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* Fix a couple of recent regressions in powernv SPRs

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Merge tag 'pull-ppc-for-10.0-3-20250408' of https://gitlab.com/npiggin/qemu into staging

* Fix a couple of recent regressions in powernv SPRs

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* tag 'pull-ppc-for-10.0-3-20250408' of https://gitlab.com/npiggin/qemu:
  target/ppc: Fix SPRC/SPRD SPRs for P9/10
  target/ppc: Big-core scratch register fix

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2025-04-08 09:12:48 -04:00
commit 70ff69a7b2
2 changed files with 20 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
target/ppc/cpu_init.c
View File

@ -5801,6 +5801,18 @@ static void register_power9_book4_sprs(CPUPPCState *env)
&spr_read_generic, &spr_write_generic,
&spr_read_generic, &spr_write_generic,
0x00000000);
/* SPRC/SPRD exist in earlier CPUs but only tested on POWER9/10 */
spr_register_hv(env, SPR_POWER_SPRC, "SPRC",
SPR_NOACCESS, SPR_NOACCESS,
SPR_NOACCESS, SPR_NOACCESS,
&spr_read_generic, &spr_write_sprc,
0x00000000);
spr_register_hv(env, SPR_POWER_SPRD, "SPRD",
SPR_NOACCESS, SPR_NOACCESS,
SPR_NOACCESS, SPR_NOACCESS,
&spr_read_sprd, &spr_write_sprd,
0x00000000);
#endif
}
@ -5822,17 +5834,6 @@ static void register_power8_book4_sprs(CPUPPCState *env)
SPR_NOACCESS, SPR_NOACCESS,
&spr_read_generic, &spr_write_generic,
KVM_REG_PPC_WORT, 0);
/* SPRC/SPRD exist in earlier CPUs but only tested on POWER9/10 */
spr_register_hv(env, SPR_POWER_SPRC, "SPRC",
SPR_NOACCESS, SPR_NOACCESS,
SPR_NOACCESS, SPR_NOACCESS,
&spr_read_generic, &spr_write_sprc,
0x00000000);
spr_register_hv(env, SPR_POWER_SPRD, "SPRD",
SPR_NOACCESS, SPR_NOACCESS,
SPR_NOACCESS, SPR_NOACCESS,
&spr_read_sprd, &spr_write_sprd,
0x00000000);
#endif
}

9
target/ppc/misc_helper.c
View File

@ -332,6 +332,10 @@ target_ulong helper_load_sprd(CPUPPCState *env)
PnvCore *pc = pnv_cpu_state(cpu)->pnv_core;
target_ulong sprc = env->spr[SPR_POWER_SPRC];
if (pc->big_core) {
pc = pnv_chip_find_core(pc->chip, CPU_CORE(pc)->core_id & ~0x1);
}
switch (sprc & 0x3e0) {
case 0: /* SCRATCH0-3 */
case 1: /* SCRATCH4-7 */
@ -368,6 +372,10 @@ void helper_store_sprd(CPUPPCState *env, target_ulong val)
PnvCore *pc = pnv_cpu_state(cpu)->pnv_core;
int nr;
if (pc->big_core) {
pc = pnv_chip_find_core(pc->chip, CPU_CORE(pc)->core_id & ~0x1);
}
switch (sprc & 0x3e0) {
case 0: /* SCRATCH0-3 */
case 1: /* SCRATCH4-7 */
@ -378,7 +386,6 @@ void helper_store_sprd(CPUPPCState *env, target_ulong val)
* information. Could also dump these upon checkstop.
*/
nr = (sprc >> 3) & 0x7;
qemu_log("SPRD write 0x" TARGET_FMT_lx " to SCRATCH%d\n", val, nr);
pc->scratch[nr] = val;
break;
default: