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