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[qemu-s390x] [PULL for-3.0 1/1] s390x/sclp: fix maxram calculation

From: Cornelia Huck
Subject: [qemu-s390x] [PULL for-3.0 1/1] s390x/sclp: fix maxram calculation
Date: Tue, 31 Jul 2018 08:50:57 +0200

From: Christian Borntraeger <address@hidden>

We clamp down ram_size to match the sclp increment size. We do
not do the same for maxram_size, which means for large guests
with some sizes (e.g. -m 50000) maxram_size differs from ram_size.
This can break other code (e.g. CMMA migration) which uses maxram_size
to calculate the number of pages and then throws some errors.

Fixes: 82fab5c5b90e468f3e9d54c ("s390x/sclp: remove memory hotplug support")
Signed-off-by: Christian Borntraeger <address@hidden>
CC: address@hidden
CC: David Hildenbrand <address@hidden>
Message-Id: <address@hidden>
Reviewed-by: David Hildenbrand <address@hidden>
Signed-off-by: Cornelia Huck <address@hidden>
 hw/s390x/sclp.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/hw/s390x/sclp.c b/hw/s390x/sclp.c
index bd2a024efd..4510a800cb 100644
--- a/hw/s390x/sclp.c
+++ b/hw/s390x/sclp.c
@@ -320,6 +320,7 @@ static void sclp_memory_init(SCLPDevice *sclp)
     initial_mem = initial_mem >> increment_size << increment_size;
     machine->ram_size = initial_mem;
+    machine->maxram_size = initial_mem;
     /* let's propagate the changed ram size into the global variable. */
     ram_size = initial_mem;

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