From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4C88BC43140 for ; Wed, 12 May 2021 15:37:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3151661C55 for ; Wed, 12 May 2021 15:37:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236033AbhELPgp (ORCPT ); Wed, 12 May 2021 11:36:45 -0400 Received: from mail.kernel.org ([198.145.29.99]:47290 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234274AbhELPQX (ORCPT ); Wed, 12 May 2021 11:16:23 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id D6DA56198F; Wed, 12 May 2021 15:06:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1620831970; bh=uCDtPvIg+BF7+DW/tFxwiAw8EJ22Uf6nOmsMa7kCj8I=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=AwdS0jSoq5jQ71K9aIIQ6t1k4sWgatG7A3D2ECobvWnzXcxv8wEbjIQQ+ZJsm1ess yXhqJ7ia0vbdwjH69fxGWWA2xhI42HtN5L+x7+oBbhoeRNSlGjKV6OxciClfXLKx7i w/og5XTnDlUSxq7K5wrsRshoGmE0KTvtnzAD50Qg= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Janosch Frank , Claudio Imbrenda , David Hildenbrand , Christian Borntraeger Subject: [PATCH 5.10 088/530] KVM: s390: VSIE: fix MVPG handling for prefixing and MSO Date: Wed, 12 May 2021 16:43:18 +0200 Message-Id: <20210512144822.685236817@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210512144819.664462530@linuxfoundation.org> References: <20210512144819.664462530@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Claudio Imbrenda commit c3171e94cc1cdcc3229565244112e869f052b8d9 upstream. Prefixing needs to be applied to the guest real address to translate it into a guest absolute address. The value of MSO needs to be added to a guest-absolute address in order to obtain the host-virtual. Fixes: bdf7509bbefa ("s390/kvm: VSIE: correctly handle MVPG when in VSIE") Reported-by: Janosch Frank Signed-off-by: Claudio Imbrenda Reviewed-by: David Hildenbrand Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20210322140559.500716-3-imbrenda@linux.ibm.com [borntraeger@de.ibm.com simplify mso] Signed-off-by: Christian Borntraeger Signed-off-by: Greg Kroah-Hartman --- arch/s390/kvm/vsie.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) --- a/arch/s390/kvm/vsie.c +++ b/arch/s390/kvm/vsie.c @@ -1001,7 +1001,7 @@ static u64 vsie_get_register(struct kvm_ static int vsie_handle_mvpg(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) { struct kvm_s390_sie_block *scb_s = &vsie_page->scb_s; - unsigned long pei_dest, pei_src, src, dest, mask; + unsigned long pei_dest, pei_src, src, dest, mask, prefix; u64 *pei_block = &vsie_page->scb_o->mcic; int edat, rc_dest, rc_src; union ctlreg0 cr0; @@ -1009,9 +1009,12 @@ static int vsie_handle_mvpg(struct kvm_v cr0.val = vcpu->arch.sie_block->gcr[0]; edat = cr0.edat && test_kvm_facility(vcpu->kvm, 8); mask = _kvm_s390_logical_to_effective(&scb_s->gpsw, PAGE_MASK); + prefix = scb_s->prefix << GUEST_PREFIX_SHIFT; dest = vsie_get_register(vcpu, vsie_page, scb_s->ipb >> 20) & mask; + dest = _kvm_s390_real_to_abs(prefix, dest) + scb_s->mso; src = vsie_get_register(vcpu, vsie_page, scb_s->ipb >> 16) & mask; + src = _kvm_s390_real_to_abs(prefix, src) + scb_s->mso; rc_dest = kvm_s390_shadow_fault(vcpu, vsie_page->gmap, dest, &pei_dest); rc_src = kvm_s390_shadow_fault(vcpu, vsie_page->gmap, src, &pei_src);