Merge remote-tracking branch 'remotes/dgibson/tags/ppc-for-4.0-20190219' into staging

ppc patch queue 2019-02-19

Here's the next batch of ppc and spapr patches.  Higlights are:

 * A bunch of improvements to TCG handling of vector instructions from
   Richard Henderson and Marc Cave-Ayland

 * Cleanup to the XICS interrupt controller from Greg Kurz, removing
   the special KVM subclasses which were a bad idea

 * Some refinements to the XIVE interrupt controller from Cédric Le
   Goater

 * Fix from Fabiano Rosas for a really dumb buffer overflow in the
   device tree code for memory hotplug

 * Code for allowing access to SPRs from the gdb stub from Fabiano
   Rosas

 * Assorted minor fixes and cleanups

# gpg: Signature made Mon 18 Feb 2019 13:47:54 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/dgibson/tags/ppc-for-4.0-20190219: (43 commits)
  target/ppc: convert vmin* and vmax* to vector operations
  target/ppc: convert vadd*s and vsub*s to vector operations
  target/ppc: Split out VSCR_SAT to a vector field
  target/ppc: Add set_vscr_sat
  target/ppc: Use mtvscr/mfvscr for vmstate
  target/ppc: Add helper_mfvscr
  target/ppc: Remove vscr_nj and vscr_sat
  target/ppc: Use helper_mtvscr for reset and gdb
  target/ppc: Pass integer to helper_mtvscr
  target/ppc: convert xxsel to vector operations
  target/ppc: convert xxspltw to vector operations
  target/ppc: convert xxspltib to vector operations
  target/ppc: convert VSX logical operations to vector operations
  target/ppc: convert vsplt[bhw] to use vector operations
  target/ppc: convert vspltis[bhw] to use vector operations
  target/ppc: convert vaddu[b,h,w,d] and vsubu[b,h,w,d] over to use vector operations
  target/ppc: convert VMX logical instructions to use vector operations
  xics: Drop the KVM ICS class
  spapr/irq: Use the "simple" ICS class for KVM
  xics: Handle KVM interrupt presentation from "simple" ICS code
  ...

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

1 files changed, 61 insertions, 0 deletions

diff --git a/target/ppc/gdbstub.c b/target/ppc/gdbstub.c
index 19565b584d..fbf3821f4b 100644
--- a/target/ppc/gdbstub.c
+++ b/target/ppc/gdbstub.c
@@ -319,3 +319,64 @@ int ppc_cpu_gdb_write_register_apple(CPUState *cs, uint8_t *mem_buf, int n)
     }
     return r;
 }
+
+#ifndef CONFIG_USER_ONLY
+void ppc_gdb_gen_spr_xml(PowerPCCPU *cpu)
+{
+    PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu);
+    CPUPPCState *env = &cpu->env;
+    GString *xml;
+    char *spr_name;
+    unsigned int num_regs = 0;
+    int i;
+
+    if (pcc->gdb_spr_xml) {
+        return;
+    }
+
+    xml = g_string_new("<?xml version=\"1.0\"?>");
+    g_string_append(xml, "<!DOCTYPE target SYSTEM \"gdb-target.dtd\">");
+    g_string_append(xml, "<feature name=\"org.qemu.power.spr\">");
+
+    for (i = 0; i < ARRAY_SIZE(env->spr_cb); i++) {
+        ppc_spr_t *spr = &env->spr_cb[i];
+
+        if (!spr->name) {
+            continue;
+        }
+
+        spr_name = g_ascii_strdown(spr->name, -1);
+        g_string_append_printf(xml, "<reg name=\"%s\"", spr_name);
+        g_free(spr_name);
+
+        g_string_append_printf(xml, " bitsize=\"%d\"", TARGET_LONG_BITS);
+        g_string_append(xml, " group=\"spr\"/>");
+
+        /*
+         * GDB identifies registers based on the order they are
+         * presented in the XML. These ids will not match QEMU's
+         * representation (which follows the PowerISA).
+         *
+         * Store the position of the current register description so
+         * we can make the correspondence later.
+         */
+        spr->gdb_id = num_regs;
+        num_regs++;
+    }
+
+    g_string_append(xml, "</feature>");
+
+    pcc->gdb_num_sprs = num_regs;
+    pcc->gdb_spr_xml = g_string_free(xml, false);
+}
+
+const char *ppc_gdb_get_dynamic_xml(CPUState *cs, const char *xml_name)
+{
+    PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cs);
+
+    if (strcmp(xml_name, "power-spr.xml") == 0) {
+        return pcc->gdb_spr_xml;
+    }
+    return NULL;
+}
+#endif