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Mon, 6 Feb 2023 16:46:09 +0000 (GMT) From: Janis Schoetterl-Glausch To: Christian Borntraeger , Janosch Frank , Claudio Imbrenda , Heiko Carstens , Vasily Gorbik , Alexander Gordeev Cc: Janis Schoetterl-Glausch , David Hildenbrand , Jonathan Corbet , kvm@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-s390@vger.kernel.org, Paolo Bonzini , Shuah Khan , Sven Schnelle Subject: [PATCH v7 11/14] KVM: s390: Refactor vcpu mem_op function Date: Mon, 6 Feb 2023 17:45:59 +0100 Message-Id: <20230206164602.138068-12-scgl@linux.ibm.com> X-Mailer: git-send-email 2.37.2 In-Reply-To: <20230206164602.138068-1-scgl@linux.ibm.com> References: <20230206164602.138068-1-scgl@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: 4mM6DFqhhqv1i-cAkb2IrRoz5ItfedFC X-Proofpoint-ORIG-GUID: rpgNK2Q9__yqD3X8lIvcAPymfTmLar6R X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.219,Aquarius:18.0.930,Hydra:6.0.562,FMLib:17.11.122.1 definitions=2023-02-06_07,2023-02-06_03,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=815 priorityscore=1501 spamscore=0 malwarescore=0 clxscore=1015 bulkscore=0 adultscore=0 mlxscore=0 impostorscore=0 phishscore=0 suspectscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2212070000 definitions=main-2302060144 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org Remove code duplication with regards to the CHECK_ONLY flag. Decrease the number of indents. No functional change indented. Suggested-by: Janosch Frank Signed-off-by: Janis Schoetterl-Glausch --- Cosmetic only, can be dropped arch/s390/kvm/kvm-s390.c | 36 +++++++++++++++++------------------- 1 file changed, 17 insertions(+), 19 deletions(-) diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index 1f94b18f1cb5..8a74b7b62ecf 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -5254,6 +5254,7 @@ static long kvm_s390_vcpu_mem_op(struct kvm_vcpu *vcpu, struct kvm_s390_mem_op *mop) { void __user *uaddr = (void __user *)mop->buf; + enum gacc_mode acc_mode; void *tmpbuf = NULL; int r; @@ -5272,38 +5273,35 @@ static long kvm_s390_vcpu_mem_op(struct kvm_vcpu *vcpu, return -ENOMEM; } - switch (mop->op) { - case KVM_S390_MEMOP_LOGICAL_READ: - if (mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY) { - r = check_gva_range(vcpu, mop->gaddr, mop->ar, mop->size, - GACC_FETCH, mop->key); - break; - } + acc_mode = mop->op == KVM_S390_MEMOP_LOGICAL_READ ? GACC_FETCH : GACC_STORE; + if (mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY) { + r = check_gva_range(vcpu, mop->gaddr, mop->ar, mop->size, + acc_mode, mop->key); + goto out_inject; + } + if (acc_mode == GACC_FETCH) { r = read_guest_with_key(vcpu, mop->gaddr, mop->ar, tmpbuf, mop->size, mop->key); - if (r == 0) { - if (copy_to_user(uaddr, tmpbuf, mop->size)) - r = -EFAULT; - } - break; - case KVM_S390_MEMOP_LOGICAL_WRITE: - if (mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY) { - r = check_gva_range(vcpu, mop->gaddr, mop->ar, mop->size, - GACC_STORE, mop->key); - break; + if (r) + goto out_inject; + if (copy_to_user(uaddr, tmpbuf, mop->size)) { + r = -EFAULT; + goto out_free; } + } else { if (copy_from_user(tmpbuf, uaddr, mop->size)) { r = -EFAULT; - break; + goto out_free; } r = write_guest_with_key(vcpu, mop->gaddr, mop->ar, tmpbuf, mop->size, mop->key); - break; } +out_inject: if (r > 0 && (mop->flags & KVM_S390_MEMOP_F_INJECT_EXCEPTION) != 0) kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm); +out_free: vfree(tmpbuf); return r; }