[libvirt] [PATCH] qemu: The ppc64 target can run both ppc64 and ppc64le guests

[Andrea Bolognani]

When looking for a QEMU binary suitable for running ppc64le guests
we have to take into account the fact that we use the QEMU target
as key for the hash, so direct comparison is not good enough:
normalize everything that can run on the ppc64 target to
VIR_ARCH_PPC64 instead.

This approach was already used in virQEMUCapsFindBinaryForArch(),
and I've added a comment there to clarify why it's needed.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1260753
---
 src/qemu/qemu_capabilities.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
index 4ad1bdb..a06141e 100644
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -699,6 +699,7 @@ virQEMUCapsFindBinaryForArch(virArch hostarch,
     const char *archstr;
     char *binary;
 
+    /* qemu-system-ppc64 can run both ppc64 and ppc64le guests */
     if (ARCH_IS_PPC64(guestarch))
         archstr = virQEMUCapsArchToString(VIR_ARCH_PPC64);
     else
@@ -3791,6 +3792,10 @@ virQEMUCapsCacheLookupByArch(virQEMUCapsCachePtr cache,
     virQEMUCapsPtr ret = NULL;
     struct virQEMUCapsSearchData data = { .arch = arch };
 
+    /* QEMU's ppc64 target can run both ppc64 and ppc64le guests */
+    if (ARCH_IS_PPC64(data.arch))
+        data.arch = VIR_ARCH_PPC64;
+
     virMutexLock(&cache->lock);
     ret = virHashSearch(cache->binaries, virQEMUCapsCompareArch, &data);
     VIR_DEBUG("Returning caps %p for arch %s", ret, virArchToString(arch));
-- 
2.4.3