Merge remote-tracking branch 'remotes/dg-gitlab/tags/ppc-for-6.0-20210310' into staging

ppc patch queue for 2021-03-10

Next batch of patches for the ppc target and machine types.  Includes:
 * Several cleanups for sm501 from Peter Maydell
 * An update to the SLOF guest firmware
 * Improved handling of hotplug failures in spapr, associated cleanups
   to the hotplug handling code
 * Several etsec fixes and cleanups from Bin Meng
 * Assorted other fixes and cleanups

# gpg: Signature made Wed 10 Mar 2021 04:08:53 GMT
# gpg:                using RSA key 75F46586AE61A66CC44E87DC6C38CACA20D9B392
# gpg: Good signature from "David Gibson <david@gibson.dropbear.id.au>" [full]
# gpg:                 aka "David Gibson (Red Hat) <dgibson@redhat.com>" [full]
# gpg:                 aka "David Gibson (ozlabs.org) <dgibson@ozlabs.org>" [full]
# gpg:                 aka "David Gibson (kernel.org) <dwg@kernel.org>" [unknown]
# Primary key fingerprint: 75F4 6586 AE61 A66C C44E  87DC 6C38 CACA 20D9 B392

* remotes/dg-gitlab/tags/ppc-for-6.0-20210310:
  spapr.c: send QAPI event when memory hotunplug fails
  spapr.c: remove duplicated assert in spapr_memory_unplug_request()
  target/ppc: fix icount support on Book-e vms accessing SPRs
  qemu_timer.c: add timer_deadline_ms() helper
  spapr_pci.c: add 'unplug already in progress' message for PCI unplug
  spapr.c: add 'unplug already in progress' message for PHB unplug
  hw/ppc: e500: Add missing <ranges> in the eTSEC node
  hw/net: fsl_etsec: Fix build error when HEX_DUMP is on
  spapr_drc.c: use DRC reconfiguration to cleanup DIMM unplug state
  spapr_drc.c: add hotunplug timeout for CPUs
  spapr_drc.c: introduce unplug_timeout_timer
  target/ppc: Fix bcdsub. emulation when result overflows
  docs/system: Extend PPC section
  spapr: rename spapr_drc_detach() to spapr_drc_unplug_request()
  spapr_drc.c: use spapr_drc_release() in isolate_physical/set_unusable
  pseries: Update SLOF firmware image
  spapr_drc.c: do not call spapr_drc_detach() in drc_isolate_logical()
  hw/display/sm501: Inline template header into C file
  hw/display/sm501: Expand out macros in template header
  hw/display/sm501: Remove dead code for non-32-bit RGB surfaces

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

2 files changed, 46 insertions, 3 deletions

diff --git a/target/ppc/int_helper.c b/target/ppc/int_helper.c
index 0b682a1f94..429de28494 100644
--- a/target/ppc/int_helper.c
+++ b/target/ppc/int_helper.c
@@ -2175,14 +2175,17 @@ static int bcd_cmp_mag(ppc_avr_t *a, ppc_avr_t *b)
     return 0;
 }
 
-static void bcd_add_mag(ppc_avr_t *t, ppc_avr_t *a, ppc_avr_t *b, int *invalid,
+static int bcd_add_mag(ppc_avr_t *t, ppc_avr_t *a, ppc_avr_t *b, int *invalid,
                        int *overflow)
 {
     int carry = 0;
     int i;
+    int is_zero = 1;
+
     for (i = 1; i <= 31; i++) {
         uint8_t digit = bcd_get_digit(a, i, invalid) +
                         bcd_get_digit(b, i, invalid) + carry;
+        is_zero &= (digit == 0);
         if (digit > 9) {
             carry = 1;
             digit -= 10;
@@ -2194,6 +2197,7 @@ static void bcd_add_mag(ppc_avr_t *t, ppc_avr_t *a, ppc_avr_t *b, int *invalid,
     }
 
     *overflow = carry;
+    return is_zero;
 }
 
 static void bcd_sub_mag(ppc_avr_t *t, ppc_avr_t *a, ppc_avr_t *b, int *invalid,
@@ -2225,14 +2229,15 @@ uint32_t helper_bcdadd(ppc_avr_t *r,  ppc_avr_t *a, ppc_avr_t *b, uint32_t ps)
     int sgnb = bcd_get_sgn(b);
     int invalid = (sgna == 0) || (sgnb == 0);
     int overflow = 0;
+    int zero = 0;
     uint32_t cr = 0;
     ppc_avr_t result = { .u64 = { 0, 0 } };
 
     if (!invalid) {
         if (sgna == sgnb) {
             result.VsrB(BCD_DIG_BYTE(0)) = bcd_preferred_sgn(sgna, ps);
-            bcd_add_mag(&result, a, b, &invalid, &overflow);
-            cr = bcd_cmp_zero(&result);
+            zero = bcd_add_mag(&result, a, b, &invalid, &overflow);
+            cr = (sgna > 0) ? CRF_GT : CRF_LT;
         } else {
             int magnitude = bcd_cmp_mag(a, b);
             if (magnitude > 0) {
@@ -2255,6 +2260,8 @@ uint32_t helper_bcdadd(ppc_avr_t *r,  ppc_avr_t *a, ppc_avr_t *b, uint32_t ps)
         cr = CRF_SO;
     } else if (overflow) {
         cr |= CRF_SO;
+    } else if (zero) {
+        cr |= CRF_EQ;
     }
 
     *r = result;
diff --git a/target/ppc/translate_init.c.inc b/target/ppc/translate_init.c.inc
index 108ff2be2b..c03a7c4f52 100644
--- a/target/ppc/translate_init.c.inc
+++ b/target/ppc/translate_init.c.inc
@@ -566,35 +566,71 @@ static void spr_write_601_ubatl(DisasContext *ctx, int sprn, int gprn)
 #if !defined(CONFIG_USER_ONLY)
 static void spr_read_40x_pit(DisasContext *ctx, int gprn, int sprn)
 {
+    if (tb_cflags(ctx->base.tb) & CF_USE_ICOUNT) {
+        gen_io_start();
+    }
     gen_helper_load_40x_pit(cpu_gpr[gprn], cpu_env);
+    if (tb_cflags(ctx->base.tb) & CF_USE_ICOUNT) {
+        gen_stop_exception(ctx);
+    }
 }
 
 static void spr_write_40x_pit(DisasContext *ctx, int sprn, int gprn)
 {
+    if (tb_cflags(ctx->base.tb) & CF_USE_ICOUNT) {
+        gen_io_start();
+    }
     gen_helper_store_40x_pit(cpu_env, cpu_gpr[gprn]);
+    if (tb_cflags(ctx->base.tb) & CF_USE_ICOUNT) {
+        gen_stop_exception(ctx);
+    }
 }
 
 static void spr_write_40x_dbcr0(DisasContext *ctx, int sprn, int gprn)
 {
+    if (tb_cflags(ctx->base.tb) & CF_USE_ICOUNT) {
+        gen_io_start();
+    }
     gen_store_spr(sprn, cpu_gpr[gprn]);
     gen_helper_store_40x_dbcr0(cpu_env, cpu_gpr[gprn]);
     /* We must stop translation as we may have rebooted */
     gen_stop_exception(ctx);
+    if (tb_cflags(ctx->base.tb) & CF_USE_ICOUNT) {
+        gen_stop_exception(ctx);
+    }
 }
 
 static void spr_write_40x_sler(DisasContext *ctx, int sprn, int gprn)
 {
+    if (tb_cflags(ctx->base.tb) & CF_USE_ICOUNT) {
+        gen_io_start();
+    }
     gen_helper_store_40x_sler(cpu_env, cpu_gpr[gprn]);
+    if (tb_cflags(ctx->base.tb) & CF_USE_ICOUNT) {
+        gen_stop_exception(ctx);
+    }
 }
 
 static void spr_write_booke_tcr(DisasContext *ctx, int sprn, int gprn)
 {
+    if (tb_cflags(ctx->base.tb) & CF_USE_ICOUNT) {
+        gen_io_start();
+    }
     gen_helper_store_booke_tcr(cpu_env, cpu_gpr[gprn]);
+    if (tb_cflags(ctx->base.tb) & CF_USE_ICOUNT) {
+        gen_stop_exception(ctx);
+    }
 }
 
 static void spr_write_booke_tsr(DisasContext *ctx, int sprn, int gprn)
 {
+    if (tb_cflags(ctx->base.tb) & CF_USE_ICOUNT) {
+        gen_io_start();
+    }
     gen_helper_store_booke_tsr(cpu_env, cpu_gpr[gprn]);
+    if (tb_cflags(ctx->base.tb) & CF_USE_ICOUNT) {
+        gen_stop_exception(ctx);
+    }
 }
 #endif