Merge remote-tracking branch 'remotes/dg-gitlab/tags/ppc-for-6.2-20210827' into staging

ppc patch queue 2021-08-27

First ppc pull request for qemu-6.2.  As usual, there's a fair bit
here, since it's been queued during the 6.1 freeze.  Highlights are:

 * Some fixes for 128 bit arithmetic and some vector opcodes that use
   them
 * Significant improvements to the powernv to support POWER10 cpus
   (more to come though)
 * Several cleanups to the ppc softmmu code
 * A few other assorted fixes

# gpg: Signature made Fri 27 Aug 2021 08:09:12 BST
# 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-6.2-20210827:
  target/ppc: fix vector registers access in gdbstub for little-endian
  include/qemu/int128.h: introduce bswap128s
  target/ppc: fix vextu[bhw][lr]x helpers
  include/qemu/int128.h: define struct Int128 according to the host endianness
  ppc/xive: Export xive_presenter_notify()
  ppc/xive: Export PQ get/set routines
  ppc/pnv: add a chip topology index for POWER10
  ppc/pnv: Distribute RAM among the chips
  ppc/pnv: Use a simple incrementing index for the chip-id
  ppc/pnv: powerpc_excp: Do not discard HDECR exception when entering power-saving mode
  ppc/pnv: Change the POWER10 machine to support DD2 only
  ppc: Add a POWER10 DD2 CPU
  ppc/pnv: update skiboot to commit 820d43c0a775.
  target/ppc: moved store_40x_sler to helper_regs.c
  target/ppc: moved ppc_store_sdr1 to mmu_common.c
  target/ppc: divided mmu_helper.c in 2 files
  spapr_pci: Fix leak in spapr_phb_vfio_get_loc_code() with g_autofree
  xive: Remove extra '0x' prefix in trace events

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

1 files changed, 7 insertions, 25 deletions

diff --git a/target/ppc/gdbstub.c b/target/ppc/gdbstub.c
index 09ff1328d4..1808a150e4 100644
--- a/target/ppc/gdbstub.c
+++ b/target/ppc/gdbstub.c
@@ -101,6 +101,8 @@ void ppc_maybe_bswap_register(CPUPPCState *env, uint8_t *mem_buf, int len)
         bswap32s((uint32_t *)mem_buf);
     } else if (len == 8) {
         bswap64s((uint64_t *)mem_buf);
+    } else if (len == 16) {
+        bswap128s((Int128 *)mem_buf);
     } else {
         g_assert_not_reached();
     }
@@ -389,15 +391,6 @@ const char *ppc_gdb_get_dynamic_xml(CPUState *cs, const char *xml_name)
 }
 #endif
 
-static bool avr_need_swap(CPUPPCState *env)
-{
-#ifdef HOST_WORDS_BIGENDIAN
-    return msr_le;
-#else
-    return !msr_le;
-#endif
-}
-
 #if !defined(CONFIG_USER_ONLY)
 static int gdb_find_spr_idx(CPUPPCState *env, int n)
 {
@@ -486,14 +479,9 @@ static int gdb_get_avr_reg(CPUPPCState *env, GByteArray *buf, int n)
 
     if (n < 32) {
         ppc_avr_t *avr = cpu_avr_ptr(env, n);
-        if (!avr_need_swap(env)) {
-            gdb_get_reg128(buf, avr->u64[0] , avr->u64[1]);
-        } else {
-            gdb_get_reg128(buf, avr->u64[1] , avr->u64[0]);
-        }
+        gdb_get_reg128(buf, avr->VsrD(0), avr->VsrD(1));
         mem_buf = gdb_get_reg_ptr(buf, 16);
-        ppc_maybe_bswap_register(env, mem_buf, 8);
-        ppc_maybe_bswap_register(env, mem_buf + 8, 8);
+        ppc_maybe_bswap_register(env, mem_buf, 16);
         return 16;
     }
     if (n == 32) {
@@ -515,15 +503,9 @@ static int gdb_set_avr_reg(CPUPPCState *env, uint8_t *mem_buf, int n)
 {
     if (n < 32) {
         ppc_avr_t *avr = cpu_avr_ptr(env, n);
-        ppc_maybe_bswap_register(env, mem_buf, 8);
-        ppc_maybe_bswap_register(env, mem_buf + 8, 8);
-        if (!avr_need_swap(env)) {
-            avr->u64[0] = ldq_p(mem_buf);
-            avr->u64[1] = ldq_p(mem_buf + 8);
-        } else {
-            avr->u64[1] = ldq_p(mem_buf);
-            avr->u64[0] = ldq_p(mem_buf + 8);
-        }
+        ppc_maybe_bswap_register(env, mem_buf, 16);
+        avr->VsrD(0) = ldq_p(mem_buf);
+        avr->VsrD(1) = ldq_p(mem_buf + 8);
         return 16;
     }
     if (n == 32) {