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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 63CE4C2BA19 for ; Sat, 11 Apr 2020 23:35:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 35248206E9 for ; Sat, 11 Apr 2020 23:35:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586648142; bh=bha6suG23kLCQTf2cY4Opk4WKpHiAl1++/qRyb7g8yE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=x1v+3X960L/CPHopOGeKmtxkwL+4tlJkYNjkTTlNcA5tbUgLnehnp3NDOobw9RWUp tFpzeBLK8SqqjCn4GMHX59L2Kn2QtwOxGUrz4c6bNsEEkWOkpL1xNmxY8BkY4XQfWP hjU9nGM9WTNpoSeEEba9TVVFyPGIc9PSuFssFSw0= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729047AbgDKXI6 (ORCPT ); Sat, 11 Apr 2020 19:08:58 -0400 Received: from mail.kernel.org ([198.145.29.99]:46194 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728000AbgDKXIx (ORCPT ); Sat, 11 Apr 2020 19:08:53 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 8788021BE5; Sat, 11 Apr 2020 23:08:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586646533; bh=bha6suG23kLCQTf2cY4Opk4WKpHiAl1++/qRyb7g8yE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RX0C7ujiwNlU1yAGdlI8g5HOmVQh75df+WOWUeMiIDwk754z3AHdla10Yp73pROWl avH97D03XT6mMOxckNhXGL2SzG4tY6pbG6QVZowmaWdfqvrQuBxjOEAYuyKeHSfgvu 7TnvZLpAToxy4yOgJM3UwyuHdWckvms4wbfzt/o4= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Laurent Dufour , Bharata B Rao , Benjamin Herrenschmidt , Michael Ellerman , Ram Pai , Fabiano Rosas , Paul Mackerras , Sasha Levin , kvm-ppc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Subject: [PATCH AUTOSEL 5.5 087/121] KVM: PPC: Book3S HV: H_SVM_INIT_START must call UV_RETURN Date: Sat, 11 Apr 2020 19:06:32 -0400 Message-Id: <20200411230706.23855-87-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200411230706.23855-1-sashal@kernel.org> References: <20200411230706.23855-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Laurent Dufour [ Upstream commit 377f02d487b5f74a2411fa01316ba4aff1819629 ] When the call to UV_REGISTER_MEM_SLOT is failing, for instance because there is not enough free secured memory, the Hypervisor (HV) has to call UV_RETURN to report the error to the Ultravisor (UV). Then the UV will call H_SVM_INIT_ABORT to abort the securing phase and go back to the calling VM. If the kvm->arch.secure_guest is not set, in the return path rfid is called but there is no valid context to get back to the SVM since the Hcall has been routed by the Ultravisor. Move the setting of kvm->arch.secure_guest earlier in kvmppc_h_svm_init_start() so in the return path, UV_RETURN will be called instead of rfid. Cc: Bharata B Rao Cc: Benjamin Herrenschmidt Cc: Michael Ellerman Signed-off-by: Laurent Dufour Reviewed-by: Ram Pai Tested-by: Fabiano Rosas Signed-off-by: Paul Mackerras Signed-off-by: Sasha Levin --- arch/powerpc/kvm/book3s_hv_uvmem.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/kvm/book3s_hv_uvmem.c b/arch/powerpc/kvm/book3s_hv_uvmem.c index 5914fbfa5e0a7..8accba2d39bc4 100644 --- a/arch/powerpc/kvm/book3s_hv_uvmem.c +++ b/arch/powerpc/kvm/book3s_hv_uvmem.c @@ -209,6 +209,8 @@ unsigned long kvmppc_h_svm_init_start(struct kvm *kvm) int ret = H_SUCCESS; int srcu_idx; + kvm->arch.secure_guest = KVMPPC_SECURE_INIT_START; + if (!kvmppc_uvmem_bitmap) return H_UNSUPPORTED; @@ -233,7 +235,6 @@ unsigned long kvmppc_h_svm_init_start(struct kvm *kvm) goto out; } } - kvm->arch.secure_guest |= KVMPPC_SECURE_INIT_START; out: srcu_read_unlock(&kvm->srcu, srcu_idx); return ret; -- 2.20.1