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[qemu-s390x] [PULL 14/15] s390x/kvm: indicate alignment in legacy_s390_a

From: Cornelia Huck
Subject: [qemu-s390x] [PULL 14/15] s390x/kvm: indicate alignment in legacy_s390_alloc()
Date: Mon, 2 Jul 2018 13:17:36 +0200

From: David Hildenbrand <address@hidden>

Let's do this for completeness reason, although we don't support e.g.
PCDIMM/NVDIMM, which would use the alignment for placing the memory
region in guest physical memory. But maybe someday we would want to
support something like this - then we don't forget about this if
allowing multiple allocations in legacy_s390_alloc().

Use the same alignment as we would set in qemu_anon_ram_alloc(). Our
fixed address satisfies this alignment (1MB). This implicitly sets the
alignment of the underlying memory region.

Signed-off-by: David Hildenbrand <address@hidden>
Message-Id: <address@hidden>
Signed-off-by: Cornelia Huck <address@hidden>
 target/s390x/kvm.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/target/s390x/kvm.c b/target/s390x/kvm.c
index a9d6d606df..d923cf4240 100644
--- a/target/s390x/kvm.c
+++ b/target/s390x/kvm.c
@@ -765,6 +765,9 @@ static void *legacy_s390_alloc(size_t size, uint64_t 
*align, bool shared)
     if (mem == MAP_FAILED) {
         mem = NULL;
+    if (mem && align) {
+        *align = QEMU_VMALLOC_ALIGN;
+    }
     return mem;

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