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From 619064cd5e5f275a0d61fcd05855b1598c2d654b Mon Sep 17 00:00:00 2001
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From: Cornelia Huck <cohuck@redhat.com>
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Date: Wed, 1 Aug 2018 11:09:14 +0200
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Subject: [PATCH 267/268] s390x/sclp: fix maxram calculation
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RH-Author: Cornelia Huck <cohuck@redhat.com>
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Message-id: <20180801110914.17729-1-cohuck@redhat.com>
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Patchwork-id: 81564
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O-Subject: [RHEL-7.6 qemu-kvm-ma PATCH] s390x/sclp: fix maxram calculation
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Bugzilla: 1595740
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RH-Acked-by: David Hildenbrand <david@redhat.com>
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RH-Acked-by: Thomas Huth <thuth@redhat.com>
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RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
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From: Christian Borntraeger <borntraeger@de.ibm.com>
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We clamp down ram_size to match the sclp increment size. We do
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not do the same for maxram_size, which means for large guests
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with some sizes (e.g. -m 50000) maxram_size differs from ram_size.
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This can break other code (e.g. CMMA migration) which uses maxram_size
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to calculate the number of pages and then throws some errors.
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Fixes: 82fab5c5b90e468f3e9d54c ("s390x/sclp: remove memory hotplug support")
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Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
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CC: qemu-stable@nongnu.org
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CC: David Hildenbrand <david@redhat.com>
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Message-Id: <1532959766-53343-1-git-send-email-borntraeger@de.ibm.com>
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Reviewed-by: David Hildenbrand <david@redhat.com>
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Signed-off-by: Cornelia Huck <cohuck@redhat.com>
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(cherry picked from commit 408e5ace517ff18c9c7cd918fc93358162e6e26d)
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Signed-off-by: Cornelia Huck <cohuck@redhat.com>
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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hw/s390x/sclp.c | 1 +
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1 file changed, 1 insertion(+)
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diff --git a/hw/s390x/sclp.c b/hw/s390x/sclp.c
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index 047d577..2abdb62 100644
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--- a/hw/s390x/sclp.c
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+++ b/hw/s390x/sclp.c
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@@ -319,6 +319,7 @@ static void sclp_memory_init(SCLPDevice *sclp)
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initial_mem = initial_mem >> increment_size << increment_size;
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machine->ram_size = initial_mem;
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+ machine->maxram_size = initial_mem;
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/* let's propagate the changed ram size into the global variable. */
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ram_size = initial_mem;
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}
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--
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1.8.3.1
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