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From aaec9beefcdc4e8cbef669d0115f4405498400de Mon Sep 17 00:00:00 2001
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From: Cornelia Huck <cohuck@redhat.com>
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Date: Wed, 17 Apr 2019 13:57:21 +0100
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Subject: [PATCH 04/24] s390x/storage attributes: fix CMMA_BLOCK_SIZE usage
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RH-Author: Cornelia Huck <cohuck@redhat.com>
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Message-id: <20190417135741.25297-5-cohuck@redhat.com>
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Patchwork-id: 85786
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O-Subject: [RHEL-8.1.0 qemu-kvm PATCH v2 04/24] s390x/storage attributes: fix CMMA_BLOCK_SIZE usage
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Bugzilla: 1699070
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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: Jens Freimann <jfreimann@redhat.com>
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From: Claudio Imbrenda <imbrenda@linux.vnet.ibm.com>
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The macro CMMA_BLOCK_SIZE was defined but not used, and a hardcoded
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value was instead used in the code.
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This patch fixes the value of CMMA_BLOCK_SIZE and uses it in the
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appropriate place in the code, and fixes another case of hardcoded
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value in the KVM backend, replacing it with the more appropriate
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constant KVM_S390_CMMA_SIZE_MAX.
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Signed-off-by: Claudio Imbrenda <imbrenda@linux.vnet.ibm.com>
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Message-Id: <1530787170-3101-1-git-send-email-imbrenda@linux.vnet.ibm.com>
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Signed-off-by: Cornelia Huck <cohuck@redhat.com>
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(cherry picked from commit 17f4566657df51c5e0cb40f30491e058d74d63c8)
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Signed-off-by: Cornelia Huck <cohuck@redhat.com>
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Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
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---
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hw/s390x/s390-stattrib-kvm.c | 3 ++-
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hw/s390x/s390-stattrib.c | 5 +++--
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2 files changed, 5 insertions(+), 3 deletions(-)
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diff --git a/hw/s390x/s390-stattrib-kvm.c b/hw/s390x/s390-stattrib-kvm.c
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index 480551c..c7e1f35 100644
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--- a/hw/s390x/s390-stattrib-kvm.c
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+++ b/hw/s390x/s390-stattrib-kvm.c
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@@ -105,7 +105,8 @@ static void kvm_s390_stattrib_synchronize(S390StAttribState *sa)
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KVMS390StAttribState *sas = KVM_S390_STATTRIB(sa);
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MachineState *machine = MACHINE(qdev_get_machine());
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unsigned long max = machine->maxram_size / TARGET_PAGE_SIZE;
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- unsigned long cx, len = 1 << 19;
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+ /* We do not need to reach the maximum buffer size allowed */
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+ unsigned long cx, len = KVM_S390_SKEYS_MAX / 2;
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int r;
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struct kvm_s390_cmma_log clog = {
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.flags = 0,
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diff --git a/hw/s390x/s390-stattrib.c b/hw/s390x/s390-stattrib.c
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index 5161a16..766f201 100644
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--- a/hw/s390x/s390-stattrib.c
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+++ b/hw/s390x/s390-stattrib.c
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@@ -21,7 +21,8 @@
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#include "qapi/error.h"
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#include "qapi/qmp/qdict.h"
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-#define CMMA_BLOCK_SIZE (1 * KiB)
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+/* 512KiB cover 2GB of guest memory */
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+#define CMMA_BLOCK_SIZE (512 * KiB)
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#define STATTR_FLAG_EOS 0x01ULL
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#define STATTR_FLAG_MORE 0x02ULL
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@@ -203,7 +204,7 @@ static int cmma_save(QEMUFile *f, void *opaque, int final)
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S390StAttribClass *sac = S390_STATTRIB_GET_CLASS(sas);
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uint8_t *buf;
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int r, cx, reallen = 0, ret = 0;
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- uint32_t buflen = 1 << 19; /* 512kB cover 2GB of guest memory */
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+ uint32_t buflen = CMMA_BLOCK_SIZE;
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uint64_t start_gfn = sas->migration_cur_gfn;
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buf = g_try_malloc(buflen);
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--
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1.8.3.1
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