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=-9.8 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 D4548C352A3 for ; Tue, 11 Feb 2020 17:51:06 +0000 (UTC) Received: from mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by mail.kernel.org (Postfix) with ESMTP id 61BEB2086A for ; Tue, 11 Feb 2020 17:51:06 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="Zw3w+SwJ" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 61BEB2086A Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvmarm-bounces@lists.cs.columbia.edu Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 141B94AC88; Tue, 11 Feb 2020 12:51:06 -0500 (EST) X-Virus-Scanned: at lists.cs.columbia.edu Authentication-Results: mm01.cs.columbia.edu (amavisd-new); dkim=softfail (fail, message has been altered) header.i=@kernel.org Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id JChW-M8euyWH; Tue, 11 Feb 2020 12:51:05 -0500 (EST) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 04CA94A946; Tue, 11 Feb 2020 12:51:05 -0500 (EST) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 5F21B4A7FD for ; Tue, 11 Feb 2020 12:51:03 -0500 (EST) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id eSdkup1ErzPM for ; Tue, 11 Feb 2020 12:51:02 -0500 (EST) Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by mm01.cs.columbia.edu (Postfix) with ESMTPS id 4A7974A7D9 for ; Tue, 11 Feb 2020 12:51:02 -0500 (EST) Received: from disco-boy.misterjones.org (disco-boy.misterjones.org [51.254.78.96]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 25C9D20661; Tue, 11 Feb 2020 17:51:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581443461; bh=DvF9CnzkNhbTzrEF+ToXoN9N21241sWEqKWABFpMVgQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Zw3w+SwJG1S8yl0ppRowiJ3ER3948GmI8LFDcf9YIghd2fYoGr3zOkeT/fQXy5b8s TlYzyE8zzk0GhvGILy04m2JByef8XeKFuC3hD6eLewZ5chtHmSFixpDWeBMiqjJw2M LC4lrEpPTKKOYgtF+m6PuhQDPl4OIjxu6f1iBVE0= Received: from 78.163-31-62.static.virginmediabusiness.co.uk ([62.31.163.78] helo=why.lan) by disco-boy.misterjones.org with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1j1Zfu-004O7k-1q; Tue, 11 Feb 2020 17:50:18 +0000 From: Marc Zyngier To: linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org Subject: [PATCH v2 42/94] KVM: arm64: nv: Introduce sys_reg_desc.forward_trap Date: Tue, 11 Feb 2020 17:48:46 +0000 Message-Id: <20200211174938.27809-43-maz@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200211174938.27809-1-maz@kernel.org> References: <20200211174938.27809-1-maz@kernel.org> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 62.31.163.78 X-SA-Exim-Rcpt-To: linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, andre.przywara@arm.com, christoffer.dall@arm.com, Dave.Martin@arm.com, jintack@cs.columbia.edu, alexandru.elisei@arm.com, james.morse@arm.com, julien.thierry.kdev@gmail.com, suzuki.poulose@arm.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false Cc: Andre Przywara , Dave Martin X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu Archived-At: List-Archive: From: Jintack Lim This introduces a function prototype to determine if we need to forward system instruction traps to the virtual EL2. The implementation of forward_trap functions for each system instruction will be added in later patches. Signed-off-by: Jintack Lim Signed-off-by: Marc Zyngier --- arch/arm64/kvm/sys_regs.c | 9 +++++++++ arch/arm64/kvm/sys_regs.h | 6 ++++++ 2 files changed, 15 insertions(+) diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index 364020afc17c..fae3f4a70eeb 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -25,6 +25,7 @@ #include #include #include +#include #include #include @@ -2491,6 +2492,14 @@ static void perform_access(struct kvm_vcpu *vcpu, */ BUG_ON(!r->access); + /* + * Forward this trap to the virtual EL2 if the guest hypervisor has + * configured to trap the current instruction. + */ + if (nested_virt_in_use(vcpu) && r->forward_trap + && unlikely(r->forward_trap(vcpu))) + return; + /* Skip instruction if instructed so */ if (likely(r->access(vcpu, params, r))) kvm_skip_instr(vcpu, kvm_vcpu_trap_il_is32bit(vcpu)); diff --git a/arch/arm64/kvm/sys_regs.h b/arch/arm64/kvm/sys_regs.h index 5a6fc30f5989..65e736f7103a 100644 --- a/arch/arm64/kvm/sys_regs.h +++ b/arch/arm64/kvm/sys_regs.h @@ -54,6 +54,12 @@ struct sys_reg_desc { int (*set_user)(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd, const struct kvm_one_reg *reg, void __user *uaddr); + /* + * Forward the trap to the virtual EL2 if the guest hypervisor has + * configured to trap the current instruction. + */ + bool (*forward_trap)(struct kvm_vcpu *vcpu); + /* Return mask of REG_* runtime visibility overrides */ unsigned int (*visibility)(const struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd); -- 2.20.1 _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm