target/ppc: Fix width of some 32-bit SPRs

Some 32-bit SPRs are incorrectly implemented as 64-bits on 64-bit
targets.

This changes VRSAVE, DSISR, HDSISR, DAWRX0, PIDR, LPIDR, DEXCR,
HDEXCR, CTRL, TSCR, MMCRH, and PMC[1-6] from to be 32-bit registers.

This only goes by the 32/64 classification in the architecture, it
does not try to implement finer details of SPR implementation (e.g.,
not all bits implemented as simple read/write storage).

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Harsh Prateek Bora <harshpb@linux.ibm.com>
Message-Id: <20230515092655.171206-2-npiggin@gmail.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>

diff --git a/target/ppc/cpu_init.c b/target/ppc/cpu_init.c
index 0ce2e3c91d99fb0035e9c516522ed00319146013..5aa0b3f0f17b4e483c54d6651eb4fffa0a1998de 100644 (file)
--- a/target/ppc/cpu_init.c
+++ b/target/ppc/cpu_init.c
@@ -5085,8 +5085,8 @@ static void register_book3s_altivec_sprs(CPUPPCState *env)
     }
 
     spr_register_kvm(env, SPR_VRSAVE, "VRSAVE",
-                     &spr_read_generic, &spr_write_generic,
-                     &spr_read_generic, &spr_write_generic,
+                     &spr_read_generic, &spr_write_generic32,
+                     &spr_read_generic, &spr_write_generic32,
                      KVM_REG_PPC_VRSAVE, 0x00000000);
 
 }
@@ -5120,7 +5120,7 @@ static void register_book3s_207_dbg_sprs(CPUPPCState *env)
     spr_register_kvm_hv(env, SPR_DAWRX0, "DAWRX0",
                         SPR_NOACCESS, SPR_NOACCESS,
                         SPR_NOACCESS, SPR_NOACCESS,
-                        &spr_read_generic, &spr_write_generic,
+                        &spr_read_generic, &spr_write_generic32,
                         KVM_REG_PPC_DAWRX, 0x00000000);
     spr_register_kvm_hv(env, SPR_CIABR, "CIABR",
                         SPR_NOACCESS, SPR_NOACCESS,
@@ -5376,7 +5376,7 @@ static void register_book3s_ids_sprs(CPUPPCState *env)
     spr_register_hv(env, SPR_TSCR, "TSCR",
                  SPR_NOACCESS, SPR_NOACCESS,
                  SPR_NOACCESS, SPR_NOACCESS,
-                 &spr_read_generic, &spr_write_generic,
+                 &spr_read_generic, &spr_write_generic32,
                  0x00000000);
     spr_register_hv(env, SPR_HMER, "HMER",
                  SPR_NOACCESS, SPR_NOACCESS,
@@ -5406,7 +5406,7 @@ static void register_book3s_ids_sprs(CPUPPCState *env)
     spr_register_hv(env, SPR_MMCRC, "MMCRC",
                  SPR_NOACCESS, SPR_NOACCESS,
                  SPR_NOACCESS, SPR_NOACCESS,
-                 &spr_read_generic, &spr_write_generic,
+                 &spr_read_generic, &spr_write_generic32,
                  0x00000000);
     spr_register_hv(env, SPR_MMCRH, "MMCRH",
                  SPR_NOACCESS, SPR_NOACCESS,
@@ -5441,7 +5441,7 @@ static void register_book3s_ids_sprs(CPUPPCState *env)
     spr_register_hv(env, SPR_HDSISR, "HDSISR",
                  SPR_NOACCESS, SPR_NOACCESS,
                  SPR_NOACCESS, SPR_NOACCESS,
-                 &spr_read_generic, &spr_write_generic,
+                 &spr_read_generic, &spr_write_generic32,
                  0x00000000);
     spr_register_hv(env, SPR_HRMOR, "HRMOR",
                  SPR_NOACCESS, SPR_NOACCESS,
@@ -5665,7 +5665,7 @@ static void register_power7_book4_sprs(CPUPPCState *env)
                      KVM_REG_PPC_ACOP, 0);
     spr_register_kvm(env, SPR_BOOKS_PID, "PID",
                      SPR_NOACCESS, SPR_NOACCESS,
-                     &spr_read_generic, &spr_write_generic,
+                     &spr_read_generic, &spr_write_generic32,
                      KVM_REG_PPC_PID, 0);
 #endif
 }
@@ -5730,7 +5730,7 @@ static void register_power10_dexcr_sprs(CPUPPCState *env)
 {
     spr_register(env, SPR_DEXCR, "DEXCR",
             SPR_NOACCESS, SPR_NOACCESS,
-            &spr_read_generic, &spr_write_generic,
+            &spr_read_generic, &spr_write_generic32,
             0);
 
     spr_register(env, SPR_UDEXCR, "DEXCR",
@@ -5741,7 +5741,7 @@ static void register_power10_dexcr_sprs(CPUPPCState *env)
     spr_register_hv(env, SPR_HDEXCR, "HDEXCR",
             SPR_NOACCESS, SPR_NOACCESS,
             SPR_NOACCESS, SPR_NOACCESS,
-            &spr_read_generic, &spr_write_generic,
+            &spr_read_generic, &spr_write_generic32,
             0);
 
     spr_register(env, SPR_UHDEXCR, "HDEXCR",

diff --git a/target/ppc/helper_regs.c b/target/ppc/helper_regs.c
index 779e7db513436ed163e9f354cc42ba604c6fc0a6..fb351c303fb667c11493fcde8b130987a927f3bb 100644 (file)
--- a/target/ppc/helper_regs.c
+++ b/target/ppc/helper_regs.c
@@ -448,7 +448,7 @@ void register_non_embedded_sprs(CPUPPCState *env)
     /* Exception processing */
     spr_register_kvm(env, SPR_DSISR, "DSISR",
                      SPR_NOACCESS, SPR_NOACCESS,
-                     &spr_read_generic, &spr_write_generic,
+                     &spr_read_generic, &spr_write_generic32,
                      KVM_REG_PPC_DSISR, 0x00000000);
     spr_register_kvm(env, SPR_DAR, "DAR",
                      SPR_NOACCESS, SPR_NOACCESS,

diff --git a/target/ppc/misc_helper.c b/target/ppc/misc_helper.c
index a9bc1522e24ec24a99c434c35365f1edcc8a5fe8..40ddc5c08c6a51fed1b7e5b5cf92d631eefad8d0 100644 (file)
--- a/target/ppc/misc_helper.c
+++ b/target/ppc/misc_helper.c
@@ -190,13 +190,13 @@ void helper_store_dpdes(CPUPPCState *env, target_ulong val)
 
 void helper_store_pidr(CPUPPCState *env, target_ulong val)
 {
-    env->spr[SPR_BOOKS_PID] = val;
+    env->spr[SPR_BOOKS_PID] = (uint32_t)val;
     tlb_flush(env_cpu(env));
 }
 
 void helper_store_lpidr(CPUPPCState *env, target_ulong val)
 {
-    env->spr[SPR_LPIDR] = val;
+    env->spr[SPR_LPIDR] = (uint32_t)val;
 
     /*
      * We need to flush the TLB on LPID changes as we only tag HV vs

diff --git a/target/ppc/power8-pmu.c b/target/ppc/power8-pmu.c
index 1381072b9e546e4497b0e3d65612c8ac468f0ad8..64a64865d728b56e4885b1e0c0dc32f434670ef2 100644 (file)
--- a/target/ppc/power8-pmu.c
+++ b/target/ppc/power8-pmu.c
@@ -272,7 +272,7 @@ void helper_store_pmc(CPUPPCState *env, uint32_t sprn, uint64_t value)
 {
     pmu_update_cycles(env);
 
-    env->spr[sprn] = value;
+    env->spr[sprn] = (uint32_t)value;
 
     pmc_update_overflow_timer(env, sprn);
 }

diff --git a/target/ppc/spr_common.h b/target/ppc/spr_common.h
index 8437eb03401cc708397ac2af57b22f5d3ba45dd7..4c0f2bed77c7cb1eaa5dca941647bd08af93a99a 100644 (file)
--- a/target/ppc/spr_common.h
+++ b/target/ppc/spr_common.h
@@ -81,6 +81,7 @@ void _spr_register(CPUPPCState *env, int num, const char *name,
 void spr_noaccess(DisasContext *ctx, int gprn, int sprn);
 void spr_read_generic(DisasContext *ctx, int gprn, int sprn);
 void spr_write_generic(DisasContext *ctx, int sprn, int gprn);
+void spr_write_generic32(DisasContext *ctx, int sprn, int gprn);
 void spr_write_MMCR0(DisasContext *ctx, int sprn, int gprn);
 void spr_write_MMCR1(DisasContext *ctx, int sprn, int gprn);
 void spr_write_PMC(DisasContext *ctx, int sprn, int gprn);
@@ -109,7 +110,6 @@ void spr_write_PMC14_ureg(DisasContext *ctx, int sprn, int gprn);
 void spr_write_PMC56_ureg(DisasContext *ctx, int sprn, int gprn);
 
 #ifndef CONFIG_USER_ONLY
-void spr_write_generic32(DisasContext *ctx, int sprn, int gprn);
 void spr_write_clear(DisasContext *ctx, int sprn, int gprn);
 void spr_access_nop(DisasContext *ctx, int sprn, int gprn);
 void spr_read_decr(DisasContext *ctx, int gprn, int sprn);

diff --git a/target/ppc/translate.c b/target/ppc/translate.c
index 1720570b9bf7011459c7205235ff6650d964236d..9b7884586c2bf830eb42a90f5ba0378a91f9660e 100644 (file)
--- a/target/ppc/translate.c
+++ b/target/ppc/translate.c
@@ -411,19 +411,6 @@ void spr_write_generic(DisasContext *ctx, int sprn, int gprn)
     spr_store_dump_spr(sprn);
 }
 
-void spr_write_CTRL(DisasContext *ctx, int sprn, int gprn)
-{
-    spr_write_generic(ctx, sprn, gprn);
-
-    /*
-     * SPR_CTRL writes must force a new translation block,
-     * allowing the PMU to calculate the run latch events with
-     * more accuracy.
-     */
-    ctx->base.is_jmp = DISAS_EXIT_UPDATE;
-}
-
-#if !defined(CONFIG_USER_ONLY)
 void spr_write_generic32(DisasContext *ctx, int sprn, int gprn)
 {
 #ifdef TARGET_PPC64
@@ -436,6 +423,19 @@ void spr_write_generic32(DisasContext *ctx, int sprn, int gprn)
 #endif
 }
 
+void spr_write_CTRL(DisasContext *ctx, int sprn, int gprn)
+{
+    spr_write_generic32(ctx, sprn, gprn);
+
+    /*
+     * SPR_CTRL writes must force a new translation block,
+     * allowing the PMU to calculate the run latch events with
+     * more accuracy.
+     */
+    ctx->base.is_jmp = DISAS_EXIT_UPDATE;
+}
+
+#if !defined(CONFIG_USER_ONLY)
 void spr_write_clear(DisasContext *ctx, int sprn, int gprn)
 {
     TCGv t0 = tcg_temp_new();