@@ -53,6 +53,7 @@ struct PnvCore {
uint32_t hwid;
uint64_t hrmor;
+ target_ulong scratch[8]; /* SPRC/SPRD indirect SCRATCH registers */
PnvCoreTODState tod_state;
PnvChip *chip;
@@ -1253,9 +1253,6 @@ struct CPUArchState {
ppc_slb_t slb[MAX_SLB_ENTRIES]; /* PowerPC 64 SLB area */
struct CPUBreakpoint *ciabr_breakpoint;
struct CPUWatchpoint *dawr0_watchpoint;
-
- /* POWER CPU regs/state */
- target_ulong scratch[8]; /* SCRATCH registers (shared across core) */
#endif
target_ulong sr[32]; /* segment registers */
uint32_t nb_BATs; /* number of BATs */
@@ -5777,16 +5777,6 @@ static void register_power_common_book4_sprs(CPUPPCState *env)
SPR_NOACCESS, SPR_NOACCESS,
&spr_read_generic, &spr_core_write_generic,
0x00000000);
- 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
}
@@ -5799,6 +5789,17 @@ static void register_power9_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
}
@@ -26,6 +26,7 @@
#include "qemu/main-loop.h"
#include "mmu-book3s-v3.h"
#include "hw/ppc/ppc.h"
+#include "hw/ppc/pnv_core.h"
#include "helper_regs.h"
@@ -321,11 +322,18 @@ void helper_store_sprc(CPUPPCState *env, target_ulong val)
target_ulong helper_load_sprd(CPUPPCState *env)
{
+ /*
+ * SPRD is a HV-only register for Power CPUs, so this will only be
+ * accessed by powernv machines.
+ */
+ PowerPCCPU *cpu = env_archcpu(env);
+ PnvCore *pc = pnv_cpu_state(cpu)->pnv_core;
target_ulong sprc = env->spr[SPR_POWER_SPRC];
- switch (sprc & 0x3c0) {
- case 0: /* SCRATCH0-7 */
- return env->scratch[(sprc >> 3) & 0x7];
+ switch (sprc & 0x3e0) {
+ case 0: /* SCRATCH0-3 */
+ case 1: /* SCRATCH4-7 */
+ return pc->scratch[(sprc >> 3) & 0x7];
default:
qemu_log_mask(LOG_UNIMP, "mfSPRD: Unimplemented SPRC:0x"
TARGET_FMT_lx"\n", sprc);
@@ -334,41 +342,27 @@ target_ulong helper_load_sprd(CPUPPCState *env)
return 0;
}
-static void do_store_scratch(CPUPPCState *env, int nr, target_ulong val)
-{
- CPUState *cs = env_cpu(env);
- CPUState *ccs;
- uint32_t nr_threads = cs->nr_threads;
-
- /*
- * Log stores to SCRATCH, because some firmware uses these for debugging
- * and logging, but they would normally be read by the BMC, which is
- * not implemented in QEMU yet. This gives a way to get at the information.
- * Could also dump these upon checkstop.
- */
- qemu_log("SPRD write 0x" TARGET_FMT_lx " to SCRATCH%d\n", val, nr);
-
- if (nr_threads == 1) {
- env->scratch[nr] = val;
- return;
- }
-
- THREAD_SIBLING_FOREACH(cs, ccs) {
- CPUPPCState *cenv = &POWERPC_CPU(ccs)->env;
- cenv->scratch[nr] = val;
- }
-}
-
void helper_store_sprd(CPUPPCState *env, target_ulong val)
{
target_ulong sprc = env->spr[SPR_POWER_SPRC];
-
- switch (sprc & 0x3c0) {
- case 0: /* SCRATCH0-7 */
- do_store_scratch(env, (sprc >> 3) & 0x7, val);
+ PowerPCCPU *cpu = env_archcpu(env);
+ PnvCore *pc = pnv_cpu_state(cpu)->pnv_core;
+
+ switch (sprc & 0x3e0) {
+ case 0: /* SCRATCH0-3 */
+ case 1: /* SCRATCH4-7 */
+ /*
+ * Log stores to SCRATCH, because some firmware uses these for
+ * debugging and logging, but they would normally be read by the BMC,
+ * which is not implemented in QEMU yet. This gives a way to get at the
+ * information. Could also dump these upon checkstop.
+ */
+ int nr = (sprc >> 3) & 0x7;
+ qemu_log("SPRD write 0x" TARGET_FMT_lx " to SCRATCH%d\n", val, nr);
+ pc->scratch[nr] = val;
break;
default:
- qemu_log_mask(LOG_UNIMP, "mfSPRD: Unimplemented SPRC:0x"
+ qemu_log_mask(LOG_UNIMP, "mtSPRD: Unimplemented SPRC:0x"
TARGET_FMT_lx"\n", sprc);
break;
}
SPRC/SPRD were recently added to all BookS CPUs supported, but they are only tested on POWER9 and POWER10, so restrict them to those CPUs. SPR indirect scratch registers presently replicated per-CPU like SMT SPRs, but the PnvCore is a better place for them since they are restricted to P9/P10. Also add SPR indirect read access to core thread state for POWER9 since skiboot accesses that when booting to check for big-core mode. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> --- include/hw/ppc/pnv_core.h | 1 + target/ppc/cpu.h | 3 -- target/ppc/cpu_init.c | 21 +++++++------- target/ppc/misc_helper.c | 60 ++++++++++++++++++--------------------- 4 files changed, 39 insertions(+), 46 deletions(-)