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 D4E5EC352A4 for ; Wed, 12 Feb 2020 19:29:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A2EAE21569 for ; Wed, 12 Feb 2020 19:29:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581535784; bh=p6Pbfw6tSSIL/+Qf0DYTAy1nUIRWkaZ8qsnuN2rtwc0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=ScZuEfWGqxu+pniYWyBM8F3two5OoVzFEQRGH+KKY7BX51RFSKCDPUDrABdW+/Jvd ZY6hzmy6WYA43OkCghzVS6eyCb+y4WDxIvSbrlKBAvG5+Z2DOYVLat7RxNpigRayfR G0euXVglbNbHzxc9fKByGJWALQ7jvMf+VXAWoY6Y= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729195AbgBLT3h (ORCPT ); Wed, 12 Feb 2020 14:29:37 -0500 Received: from foss.arm.com ([217.140.110.172]:37170 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729182AbgBLT3e (ORCPT ); Wed, 12 Feb 2020 14:29:34 -0500 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 0475A101E; Wed, 12 Feb 2020 11:29:34 -0800 (PST) Received: from localhost (unknown [10.37.6.21]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 7D53F3F68E; Wed, 12 Feb 2020 11:29:33 -0800 (PST) From: Mark Brown To: Catalin Marinas , Will Deacon Cc: Alexander Viro , Paul Elliott , Peter Zijlstra , Yu-cheng Yu , Amit Kachhap , Vincenzo Frascino , Marc Zyngier , Eugene Syromiatnikov , Szabolcs Nagy , "H . J . Lu " , Andrew Jones , Kees Cook , Arnd Bergmann , Jann Horn , Richard Henderson , =?UTF-8?q?Kristina=20Mart=C5=A1enko?= , Thomas Gleixner , Florian Weimer , Sudakshina Das , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, linux-fsdevel@vger.kernel.org, Dave Martin , Mark Brown Subject: [PATCH v6 10/11] KVM: arm64: BTI: Reset BTYPE when skipping emulated instructions Date: Wed, 12 Feb 2020 19:29:05 +0000 Message-Id: <20200212192906.53366-11-broonie@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200212192906.53366-1-broonie@kernel.org> References: <20200212192906.53366-1-broonie@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org From: Dave Martin Since normal execution of any non-branch instruction resets the PSTATE BTYPE field to 0, so do the same thing when emulating a trapped instruction. Branches don't trap directly, so we should never need to assign a non-zero value to BTYPE here. Signed-off-by: Dave Martin Signed-off-by: Mark Brown --- arch/arm64/include/asm/kvm_emulate.h | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/arch/arm64/include/asm/kvm_emulate.h b/arch/arm64/include/asm/kvm_emulate.h index 688c63412cc2..dee51c1dcb93 100644 --- a/arch/arm64/include/asm/kvm_emulate.h +++ b/arch/arm64/include/asm/kvm_emulate.h @@ -506,10 +506,12 @@ static inline unsigned long vcpu_data_host_to_guest(struct kvm_vcpu *vcpu, static inline void kvm_skip_instr(struct kvm_vcpu *vcpu, bool is_wide_instr) { - if (vcpu_mode_is_32bit(vcpu)) + if (vcpu_mode_is_32bit(vcpu)) { kvm_skip_instr32(vcpu, is_wide_instr); - else + } else { *vcpu_pc(vcpu) += 4; + *vcpu_cpsr(vcpu) &= ~PSR_BTYPE_MASK; + } /* advance the singlestep state machine */ *vcpu_cpsr(vcpu) &= ~DBG_SPSR_SS; -- 2.20.1