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Fri, 7 Jan 2022 21:00:28 GMT Received: from b03ledav004.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 94E3978066; Fri, 7 Jan 2022 21:00:28 +0000 (GMT) Received: from b03ledav004.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 05D3E78063; Fri, 7 Jan 2022 21:00:27 +0000 (GMT) Received: from farosas.linux.ibm.com.com (unknown [9.211.59.174]) by b03ledav004.gho.boulder.ibm.com (Postfix) with ESMTP; Fri, 7 Jan 2022 21:00:26 +0000 (GMT) From: Fabiano Rosas To: kvm-ppc@vger.kernel.org Subject: [PATCH v3 4/6] KVM: PPC: mmio: Queue interrupt at kvmppc_emulate_mmio Date: Fri, 7 Jan 2022 18:00:10 -0300 Message-Id: <20220107210012.4091153-5-farosas@linux.ibm.com> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20220107210012.4091153-1-farosas@linux.ibm.com> References: <20220107210012.4091153-1-farosas@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: DJXczPn7RRW7VeDYOMTAewdRY3G21liL X-Proofpoint-ORIG-GUID: mHOQHwLYdC6ggQybAwJVHprr-XbjeiYn X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.790,Hydra:6.0.425,FMLib:17.11.62.513 definitions=2022-01-07_09,2022-01-07_01,2021-12-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 spamscore=0 clxscore=1015 impostorscore=0 lowpriorityscore=0 malwarescore=0 mlxscore=0 adultscore=0 priorityscore=1501 bulkscore=0 suspectscore=0 mlxlogscore=886 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2110150000 definitions=main-2201070125 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linuxppc-dev@lists.ozlabs.org, npiggin@gmail.com, aik@ozlabs.ru Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" If MMIO emulation fails, we queue a Program interrupt to the guest. Move that line up into kvmppc_emulate_mmio, which is where we set RESUME_GUEST/HOST. This allows the removal of the 'advance' variable. No functional change, just separation of responsibilities. Signed-off-by: Fabiano Rosas --- arch/powerpc/kvm/emulate_loadstore.c | 8 +------- arch/powerpc/kvm/powerpc.c | 2 +- 2 files changed, 2 insertions(+), 8 deletions(-) diff --git a/arch/powerpc/kvm/emulate_loadstore.c b/arch/powerpc/kvm/emulate_loadstore.c index 48272a9b9c30..4dec920fe4c9 100644 --- a/arch/powerpc/kvm/emulate_loadstore.c +++ b/arch/powerpc/kvm/emulate_loadstore.c @@ -73,7 +73,6 @@ int kvmppc_emulate_loadstore(struct kvm_vcpu *vcpu) { u32 inst; enum emulation_result emulated = EMULATE_FAIL; - int advance = 1; struct instruction_op op; /* this default type might be overwritten by subcategories */ @@ -355,15 +354,10 @@ int kvmppc_emulate_loadstore(struct kvm_vcpu *vcpu) } } - if (emulated == EMULATE_FAIL) { - advance = 0; - kvmppc_core_queue_program(vcpu, 0); - } - trace_kvm_ppc_instr(inst, kvmppc_get_pc(vcpu), emulated); /* Advance past emulated instruction. */ - if (advance) + if (emulated != EMULATE_FAIL) kvmppc_set_pc(vcpu, kvmppc_get_pc(vcpu) + 4); return emulated; diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c index 4d7d0d080232..6daeea4a7de1 100644 --- a/arch/powerpc/kvm/powerpc.c +++ b/arch/powerpc/kvm/powerpc.c @@ -307,7 +307,7 @@ int kvmppc_emulate_mmio(struct kvm_vcpu *vcpu) u32 last_inst; kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst); - /* XXX Deliver Program interrupt to guest. */ + kvmppc_core_queue_program(vcpu, 0); pr_info("%s: emulation failed (%08x)\n", __func__, last_inst); r = RESUME_HOST; break; -- 2.33.1 From mboxrd@z Thu Jan 1 00:00:00 1970 From: Fabiano Rosas Date: Fri, 07 Jan 2022 20:59:03 +0000 Subject: [PATCH v3 4/6] KVM: PPC: mmio: Queue interrupt at kvmppc_emulate_mmio Message-Id: <20220107210012.4091153-5-farosas@linux.ibm.com> List-Id: References: <20220107210012.4091153-1-farosas@linux.ibm.com> In-Reply-To: <20220107210012.4091153-1-farosas@linux.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: kvm-ppc@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org, npiggin@gmail.com, aik@ozlabs.ru If MMIO emulation fails, we queue a Program interrupt to the guest. Move that line up into kvmppc_emulate_mmio, which is where we set RESUME_GUEST/HOST. This allows the removal of the 'advance' variable. No functional change, just separation of responsibilities. Signed-off-by: Fabiano Rosas --- arch/powerpc/kvm/emulate_loadstore.c | 8 +------- arch/powerpc/kvm/powerpc.c | 2 +- 2 files changed, 2 insertions(+), 8 deletions(-) diff --git a/arch/powerpc/kvm/emulate_loadstore.c b/arch/powerpc/kvm/emulate_loadstore.c index 48272a9b9c30..4dec920fe4c9 100644 --- a/arch/powerpc/kvm/emulate_loadstore.c +++ b/arch/powerpc/kvm/emulate_loadstore.c @@ -73,7 +73,6 @@ int kvmppc_emulate_loadstore(struct kvm_vcpu *vcpu) { u32 inst; enum emulation_result emulated = EMULATE_FAIL; - int advance = 1; struct instruction_op op; /* this default type might be overwritten by subcategories */ @@ -355,15 +354,10 @@ int kvmppc_emulate_loadstore(struct kvm_vcpu *vcpu) } } - if (emulated = EMULATE_FAIL) { - advance = 0; - kvmppc_core_queue_program(vcpu, 0); - } - trace_kvm_ppc_instr(inst, kvmppc_get_pc(vcpu), emulated); /* Advance past emulated instruction. */ - if (advance) + if (emulated != EMULATE_FAIL) kvmppc_set_pc(vcpu, kvmppc_get_pc(vcpu) + 4); return emulated; diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c index 4d7d0d080232..6daeea4a7de1 100644 --- a/arch/powerpc/kvm/powerpc.c +++ b/arch/powerpc/kvm/powerpc.c @@ -307,7 +307,7 @@ int kvmppc_emulate_mmio(struct kvm_vcpu *vcpu) u32 last_inst; kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst); - /* XXX Deliver Program interrupt to guest. */ + kvmppc_core_queue_program(vcpu, 0); pr_info("%s: emulation failed (%08x)\n", __func__, last_inst); r = RESUME_HOST; break; -- 2.33.1