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Fri, 1 Dec 2023 13:27:07 +0000 (GMT) Received: from smtpav07.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 5B92320043; Fri, 1 Dec 2023 13:27:03 +0000 (GMT) Received: from vaibhav?linux.ibm.com (unknown [9.171.33.138]) by smtpav07.fra02v.mail.ibm.com (Postfix) with SMTP; Fri, 1 Dec 2023 13:27:03 +0000 (GMT) Received: by vaibhav@linux.ibm.com (sSMTP sendmail emulation); Fri, 01 Dec 2023 18:57:02 +0530 From: Vaibhav Jain To: linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, kvm-ppc@vger.kernel.org Subject: [PATCH 08/12] KVM: PPC: Book3S HV nestedv2: Avoid msr check in kvmppc_handle_exit_hv() Date: Fri, 1 Dec 2023 18:56:13 +0530 Message-ID: <20231201132618.555031-9-vaibhav@linux.ibm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20231201132618.555031-1-vaibhav@linux.ibm.com> References: <20231201132618.555031-1-vaibhav@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: CUyYbrUI9xNS3oGiOdiCqRskuN7YI_k9 X-Proofpoint-GUID: IjTHOrr3Ujk_km9JTggU6iGABfyorh0n X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.997,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-12-01_11,2023-11-30_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 mlxscore=0 mlxlogscore=707 spamscore=0 clxscore=1015 bulkscore=0 adultscore=0 impostorscore=0 priorityscore=1501 lowpriorityscore=0 malwarescore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311060000 definitions=main-2312010091 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: mikey@neuling.org, sbhat@linux.ibm.com, amachhiw@linux.vnet.ibm.com, Jordan Niethe , gautam@linux.ibm.com, Nicholas Piggin , David.Laight@ACULAB.COM, kconsul@linux.vnet.ibm.com, Vaibhav Jain , Vaidyanathan Srinivasan Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" From: Jordan Niethe The msr check in kvmppc_handle_exit_hv() is not needed for nestedv2 hosts, skip the check to avoid a H_GUEST_GET_STATE hcall. Signed-off-by: Jordan Niethe --- arch/powerpc/kvm/book3s_hv.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c index 4dc6a928073f..47fe470375df 100644 --- a/arch/powerpc/kvm/book3s_hv.c +++ b/arch/powerpc/kvm/book3s_hv.c @@ -1597,7 +1597,7 @@ static int kvmppc_handle_exit_hv(struct kvm_vcpu *vcpu, * That can happen due to a bug, or due to a machine check * occurring at just the wrong time. */ - if (__kvmppc_get_msr_hv(vcpu) & MSR_HV) { + if (!kvmhv_is_nestedv2() && (__kvmppc_get_msr_hv(vcpu) & MSR_HV)) { printk(KERN_EMERG "KVM trap in HV mode!\n"); printk(KERN_EMERG "trap=0x%x | pc=0x%lx | msr=0x%llx\n", vcpu->arch.trap, kvmppc_get_pc(vcpu),