From patchwork Mon Jul 6 12:54:14 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marc Zyngier X-Patchwork-Id: 11645675 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 54F071398 for ; Mon, 6 Jul 2020 12:55:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3A4EA20874 for ; Mon, 6 Jul 2020 12:55:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1594040107; bh=hP1SRFFRWqbDLnmg7Ay63LFh6KHBdMO20c6qOlnTzaU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=U3JEO6r2maOPtegE1gyt8KxGTQiAy7CDe6LEUqB4dcqZmXJP5H929jyWmfiyj08ys feW1SOfDcaDceuuuFQ/VTElotz5tkTjt5Izl/tnbeWh1ymicMbtTnMXigxx6IkbG9V cfqEBHAR/WzuT/bT8d8JqAilCxf32iaDsa40O3Is= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729198AbgGFMzG (ORCPT ); Mon, 6 Jul 2020 08:55:06 -0400 Received: from mail.kernel.org ([198.145.29.99]:40788 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729155AbgGFMy7 (ORCPT ); Mon, 6 Jul 2020 08:54:59 -0400 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 42E1B20773; Mon, 6 Jul 2020 12:54:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1594040098; bh=hP1SRFFRWqbDLnmg7Ay63LFh6KHBdMO20c6qOlnTzaU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Wp7ej8MTSg+F0bYDjSR/h+xjeylFGveYG6kNyGIQWO6G8435ocTgRaUmMuDCJPzP9 Ma57wKDxDxrQSfqvQB6AVKq+QGoE7MkYUvfH1lILnxzPPanXAZcjc9Ab2WSCRFKhyZ Nhat7JYshy5EQQLhjFBRoPrH0SvBHbRm4RIA7xfA= 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 1jsQe8-009SCo-QN; Mon, 06 Jul 2020 13:54:56 +0100 From: Marc Zyngier To: Catalin Marinas , linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org Cc: Andre Przywara , Christoffer Dall , Dave Martin , Jintack Lim , Alexandru Elisei , George Cherian , "Zengtao (B)" , Andrew Scull , Will Deacon , Mark Rutland , James Morse , Julien Thierry , Suzuki K Poulose , kernel-team@android.com Subject: [PATCH v3 06/17] KVM: arm64: Introduce accessor for ctxt->sys_reg Date: Mon, 6 Jul 2020 13:54:14 +0100 Message-Id: <20200706125425.1671020-7-maz@kernel.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200706125425.1671020-1-maz@kernel.org> References: <20200706125425.1671020-1-maz@kernel.org> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 62.31.163.78 X-SA-Exim-Rcpt-To: catalin.marinas@arm.com, 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, gcherian@marvell.com, prime.zeng@hisilicon.com, ascull@google.com, will@kernel.org, mark.rutland@arm.com, james.morse@arm.com, julien.thierry.kdev@gmail.com, suzuki.poulose@arm.com, kernel-team@android.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org In order to allow the disintegration of the per-vcpu sysreg array, let's introduce a new helper (ctxt_sys_reg()) that returns the in-memory copy of a system register, picked from a given context. __vcpu_sys_reg() is rewritten to use this helper. Signed-off-by: Marc Zyngier --- arch/arm64/include/asm/kvm_host.h | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index 85a529eeeae3..5b168226088e 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -405,12 +405,17 @@ struct kvm_vcpu_arch { #define vcpu_gp_regs(v) (&(v)->arch.ctxt.gp_regs) /* - * Only use __vcpu_sys_reg if you know you want the memory backed version of a - * register, and not the one most recently accessed by a running VCPU. For - * example, for userspace access or for system registers that are never context - * switched, but only emulated. + * Only use __vcpu_sys_reg/ctxt_sys_reg if you know you want the + * memory backed version of a register, and not the one most recently + * accessed by a running VCPU. For example, for userspace access or + * for system registers that are never context switched, but only + * emulated. */ -#define __vcpu_sys_reg(v,r) ((v)->arch.ctxt.sys_regs[(r)]) +#define __ctxt_sys_reg(c,r) (&(c)->sys_regs[(r)]) + +#define ctxt_sys_reg(c,r) (*__ctxt_sys_reg(c,r)) + +#define __vcpu_sys_reg(v,r) (ctxt_sys_reg(&(v)->arch.ctxt, (r))) u64 vcpu_read_sys_reg(const struct kvm_vcpu *vcpu, int reg); void vcpu_write_sys_reg(struct kvm_vcpu *vcpu, u64 val, int reg);