pnv/xive2: Add definition for TCTXT Config register

Add basic read/write support for the TCTXT Config register on P10. qemu
doesn't do anything with it yet, but it avoids logging a guest error
when skiboot configures the fused-core state:

qemu-system-ppc64 -machine powernv10 ... -d guest_errors
  ...
[    0.131670000,5] XIVE: [ IC 00  ] Initializing XIVE block ID 0...
XIVE[0] - TCTXT: invalid read @140
XIVE[0] - TCTXT: invalid write @140

Signed-off-by: Frederic Barrat <fbarrat@linux.ibm.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20230601121331.487207-2-fbarrat@linux.ibm.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>

diff --git a/hw/intc/pnv_xive2.c b/hw/intc/pnv_xive2.c
index 7176d7023406f58520deb674438d5c725ed469f1..889e4099295210e61d1f535d6b58291748e7e965 100644 (file)
--- a/hw/intc/pnv_xive2.c
+++ b/hw/intc/pnv_xive2.c
@@ -1265,6 +1265,9 @@ static uint64_t pnv_xive2_ic_tctxt_read(void *opaque, hwaddr offset,
     case TCTXT_EN1_RESET:
         val = xive->tctxt_regs[TCTXT_EN1 >> 3];
         break;
+    case TCTXT_CFG:
+        val = xive->tctxt_regs[reg];
+        break;
     default:
         xive2_error(xive, "TCTXT: invalid read @%"HWADDR_PRIx, offset);
     }
@@ -1276,6 +1279,7 @@ static void pnv_xive2_ic_tctxt_write(void *opaque, hwaddr offset,
                                      uint64_t val, unsigned size)
 {
     PnvXive2 *xive = PNV_XIVE2(opaque);
+    uint32_t reg = offset >> 3;
 
     switch (offset) {
     /*
@@ -1297,7 +1301,9 @@ static void pnv_xive2_ic_tctxt_write(void *opaque, hwaddr offset,
     case TCTXT_EN1_RESET:
         xive->tctxt_regs[TCTXT_EN1 >> 3] &= ~val;
         break;
-
+    case TCTXT_CFG:
+        xive->tctxt_regs[reg] = val;
+        break;
     default:
         xive2_error(xive, "TCTXT: invalid write @%"HWADDR_PRIx, offset);
         return;

diff --git a/hw/intc/pnv_xive2_regs.h b/hw/intc/pnv_xive2_regs.h
index 0c096e4adb627ae91ed77713d234db6832a6e73d..8f1e0a1fde7c1d08a70f0086c61f5137fa8f772f 100644 (file)
--- a/hw/intc/pnv_xive2_regs.h
+++ b/hw/intc/pnv_xive2_regs.h
@@ -405,6 +405,10 @@
 #define X_TCTXT_EN1_RESET                       0x307
 #define TCTXT_EN1_RESET                         0x038
 
+/* TCTXT Config register */
+#define X_TCTXT_CFG                             0x328
+#define TCTXT_CFG                               0x140
+
 /*
  * VSD Tables
  */