[PULL 07/41] ppc/xive: check return value of ldq_be_dma()

["Cédric Le Goater" <clg@kaod.org>]

The ldq_be_dma() routine was recently changed to return a result of
the transaction. Use it when loading the virtual structure descriptors
in the XIVE PowerNV model.

Cc: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20220124081635.3672439-1-clg@kaod.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
 hw/intc/pnv_xive.c | 22 ++++++++++++++++++----
 1 file changed, 18 insertions(+), 4 deletions(-)

diff --git a/hw/intc/pnv_xive.c b/hw/intc/pnv_xive.c
index bb207514f2dd..621b20a03f5f 100644
--- a/hw/intc/pnv_xive.c
+++ b/hw/intc/pnv_xive.c
@@ -172,7 +172,12 @@ static uint64_t pnv_xive_vst_addr_indirect(PnvXive *xive, uint32_t type,
 
     /* Get the page size of the indirect table. */
     vsd_addr = vsd & VSD_ADDRESS_MASK;
-    ldq_be_dma(&address_space_memory, vsd_addr, &vsd, MEMTXATTRS_UNSPECIFIED);
+    if (ldq_be_dma(&address_space_memory, vsd_addr, &vsd,
+                    MEMTXATTRS_UNSPECIFIED)) {
+        xive_error(xive, "VST: failed to access %s entry %x @0x%" PRIx64,
+                   info->name, idx, vsd_addr);
+        return 0;
+    }
 
     if (!(vsd & VSD_ADDRESS_MASK)) {
 #ifdef XIVE_DEBUG
@@ -195,8 +200,12 @@ static uint64_t pnv_xive_vst_addr_indirect(PnvXive *xive, uint32_t type,
     /* Load the VSD we are looking for, if not already done */
     if (vsd_idx) {
         vsd_addr = vsd_addr + vsd_idx * XIVE_VSD_SIZE;
-        ldq_be_dma(&address_space_memory, vsd_addr, &vsd,
-                   MEMTXATTRS_UNSPECIFIED);
+        if (ldq_be_dma(&address_space_memory, vsd_addr, &vsd,
+                       MEMTXATTRS_UNSPECIFIED)) {
+            xive_error(xive, "VST: failed to access %s entry %x @0x%"
+                       PRIx64, info->name, vsd_idx, vsd_addr);
+            return 0;
+        }
 
         if (!(vsd & VSD_ADDRESS_MASK)) {
 #ifdef XIVE_DEBUG
@@ -543,7 +552,12 @@ static uint64_t pnv_xive_vst_per_subpage(PnvXive *xive, uint32_t type)
 
     /* Get the page size of the indirect table. */
     vsd_addr = vsd & VSD_ADDRESS_MASK;
-    ldq_be_dma(&address_space_memory, vsd_addr, &vsd, MEMTXATTRS_UNSPECIFIED);
+    if (ldq_be_dma(&address_space_memory, vsd_addr, &vsd,
+                   MEMTXATTRS_UNSPECIFIED)) {
+        xive_error(xive, "VST: failed to access %s entry @0x%" PRIx64,
+                   info->name, vsd_addr);
+        return 0;
+    }
 
     if (!(vsd & VSD_ADDRESS_MASK)) {
 #ifdef XIVE_DEBUG
-- 
2.34.1