target-ppc: Add POWER8's TM SPRs

This adds TM (Transactional Memory) SPRs.

This adds generic spr_read_prev_upper32()/spr_write_prev_upper32() to
handle upper half SPRs such as TEXASRU which is upper half of TEXASR.
Since this is not the only register like that and their numbers go
consequently, it makes sense to generalize the helpers.

This adds a gen_msr_facility_check() helper which purpose is to generate
the Facility Unavailable exception if the facility is disabled.
It is a copy of gen_fscr_facility_check() but it checks for enabled
facility in MSR rather than FSCR/HFSCR. It still sets the interrupt cause
in FSCR/HFSCR (whichever is passed to the helper).

This adds spr_read_tm/spr_write_tm/spr_read_tm_upper32/spr_write_tm_upper32
which are used for TM SPRs.

This adds TM-relates MSR bits definitions. This enables TM in POWER8 CPU class'
msr_mask.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>

1 files changed, 88 insertions, 0 deletions

diff --git a/target-ppc/translate_init.c b/target-ppc/translate_init.c
index 548b582542..d31ecc6486 100644
--- a/target-ppc/translate_init.c
+++ b/target-ppc/translate_init.c
@@ -7297,6 +7297,45 @@ static void gen_fscr_facility_check(void *opaque, int facility_sprn, int bit,
     tcg_temp_free_i32(t1);
 }
 
+static void gen_msr_facility_check(void *opaque, int facility_sprn, int bit,
+                                   int sprn, int cause)
+{
+    TCGv_i32 t1 = tcg_const_i32(bit);
+    TCGv_i32 t2 = tcg_const_i32(sprn);
+    TCGv_i32 t3 = tcg_const_i32(cause);
+
+    gen_update_current_nip(opaque);
+    gen_helper_msr_facility_check(cpu_env, t1, t2, t3);
+
+    tcg_temp_free_i32(t3);
+    tcg_temp_free_i32(t2);
+    tcg_temp_free_i32(t1);
+}
+
+static void spr_read_prev_upper32(void *opaque, int gprn, int sprn)
+{
+    TCGv spr_up = tcg_temp_new();
+    TCGv spr = tcg_temp_new();
+
+    gen_load_spr(spr, sprn - 1);
+    tcg_gen_shri_tl(spr_up, spr, 32);
+    tcg_gen_ext32u_tl(cpu_gpr[gprn], spr_up);
+
+    tcg_temp_free(spr);
+    tcg_temp_free(spr_up);
+}
+
+static void spr_write_prev_upper32(void *opaque, int sprn, int gprn)
+{
+    TCGv spr = tcg_temp_new();
+
+    gen_load_spr(spr, sprn - 1);
+    tcg_gen_deposit_tl(spr, spr, cpu_gpr[gprn], 32, 32);
+    gen_store_spr(sprn - 1, spr);
+
+    tcg_temp_free(spr);
+}
+
 static int check_pow_970 (CPUPPCState *env)
 {
     if (env->spr[SPR_HID0] & (HID0_DEEPNAP | HID0_DOZE | HID0_NAP)) {
@@ -7634,6 +7673,50 @@ static void gen_spr_power8_tce_address_control(CPUPPCState *env)
                  0x00000000);
 }
 
+static void spr_read_tm(void *opaque, int gprn, int sprn)
+{
+    gen_msr_facility_check(opaque, SPR_FSCR, MSR_TM, sprn, FSCR_IC_TM);
+    spr_read_generic(opaque, gprn, sprn);
+}
+
+static void spr_write_tm(void *opaque, int sprn, int gprn)
+{
+    gen_msr_facility_check(opaque, SPR_FSCR, MSR_TM, sprn, FSCR_IC_TM);
+    spr_write_generic(opaque, sprn, gprn);
+}
+
+static void spr_read_tm_upper32(void *opaque, int gprn, int sprn)
+{
+    gen_msr_facility_check(opaque, SPR_FSCR, MSR_TM, sprn, FSCR_IC_TM);
+    spr_read_prev_upper32(opaque, gprn, sprn);
+}
+
+static void spr_write_tm_upper32(void *opaque, int sprn, int gprn)
+{
+    gen_msr_facility_check(opaque, SPR_FSCR, MSR_TM, sprn, FSCR_IC_TM);
+    spr_write_prev_upper32(opaque, sprn, gprn);
+}
+
+static void gen_spr_power8_tm(CPUPPCState *env)
+{
+    spr_register_kvm(env, SPR_TFHAR, "TFHAR",
+                     &spr_read_tm, &spr_write_tm,
+                     &spr_read_tm, &spr_write_tm,
+                     KVM_REG_PPC_TFHAR, 0x00000000);
+    spr_register_kvm(env, SPR_TFIAR, "TFIAR",
+                     &spr_read_tm, &spr_write_tm,
+                     &spr_read_tm, &spr_write_tm,
+                     KVM_REG_PPC_TFIAR, 0x00000000);
+    spr_register_kvm(env, SPR_TEXASR, "TEXASR",
+                     &spr_read_tm, &spr_write_tm,
+                     &spr_read_tm, &spr_write_tm,
+                     KVM_REG_PPC_TEXASR, 0x00000000);
+    spr_register(env, SPR_TEXASRU, "TEXASRU",
+                 &spr_read_tm_upper32, &spr_write_tm_upper32,
+                 &spr_read_tm_upper32, &spr_write_tm_upper32,
+                 0x00000000);
+}
+
 static void gen_spr_power8_fscr(CPUPPCState *env)
 {
 #if defined(CONFIG_USER_ONLY)
@@ -7695,6 +7778,7 @@ static void init_proc_book3s_64(CPUPPCState *env, int version)
         gen_spr_power8_fscr(env);
         gen_spr_power8_pmu_sup(env);
         gen_spr_power8_pmu_user(env);
+        gen_spr_power8_tm(env);
     }
 #if !defined(CONFIG_USER_ONLY)
     switch (version) {
@@ -8066,6 +8150,7 @@ POWERPC_FAMILY(POWER8)(ObjectClass *oc, void *data)
                         PPC2_LSQ_ISA207 | PPC2_ALTIVEC_207 |
                         PPC2_ISA205 | PPC2_ISA207S;
     pcc->msr_mask = (1ull << MSR_SF) |
+                    (1ull << MSR_TM) |
                     (1ull << MSR_VR) |
                     (1ull << MSR_VSX) |
                     (1ull << MSR_EE) |
@@ -9378,6 +9463,9 @@ static void ppc_cpu_reset(CPUState *s)
     msr |= (target_ulong)1 << MSR_VSX; /* Allow VSX usage */
     msr |= (target_ulong)1 << MSR_SPE; /* Allow SPE usage */
     msr |= (target_ulong)1 << MSR_PR;
+#if defined(TARGET_PPC64)
+    msr |= (target_ulong)1 << MSR_TM; /* Transactional memory */
+#endif
 #if !defined(TARGET_WORDS_BIGENDIAN)
     msr |= (target_ulong)1 << MSR_LE; /* Little-endian user mode */
 #endif