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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 811DBC43334 for ; Wed, 6 Jul 2022 16:44:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=BXtgHCqPzPvP5J4edhP6MiWlu45UOE0o5cndEjZdbBc=; b=t2eQY4m12KbHDR qruhnaxRqNWEPKeYTh8s6GBusrtk8WAbaYXg+41wSzR4IgTU5/mHLzFtWbyXm8tuY6iDbJ4xDaXiZ ++HPf8u6FJGPoyYzPgLnJ60hoAGK01DPMA1XJqg58qxaNuL7qapD2SQLpTyyo1zCgTWzEVg/NJW+A X9eGkBKa1UAoCVpIM4u5Q4iYQBv4ZQCqhZvHyY6NMKptif4/wTstFhOAqWntB34kHwCr82lP+T+Dl +gQbSmVNVZs/pjBvlkXv0nOwnf9nmeLB2L9lifzTpqTAnJVFjd6SRLm2mVOxogl8hE25dcuv0HNkz pmU3loJGf2wEBH9f5C0A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1o987b-00BQFG-Ld; Wed, 06 Jul 2022 16:43:27 +0000 Received: from dfw.source.kernel.org ([2604:1380:4641:c500::1]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1o987O-00BQ7r-20 for linux-arm-kernel@lists.infradead.org; Wed, 06 Jul 2022 16:43:15 +0000 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 617B561DA8; Wed, 6 Jul 2022 16:43:13 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C3D5EC341CD; Wed, 6 Jul 2022 16:43:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1657125792; bh=UNgtJW5DG8RhYbDqvxaLJ/hTwlK4WDui2tGquNMVOgo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=KR6A7IHscJzVK5Gn1n9JnNcIZsBDBaJ+Htv6HCVi1HNwj4MomClV6KgnyIN74ZIQL QcKeS/ct2pyeIhHbT0ks2UGV+dFmzGjsFAQMwquUt/JwWNSgsQGoplEuMRextyc1Yv aDRlpK0YtJQHnhaOwTDYp5co7xWcA8BUgyy85cwXRe07gqkyKAuYLIEM8NxGW4c0Ik KzdaqSLQYEwuyjL4oTH63GGr7azIWebP0dge14MMlJvM8hYTeGF/W7aVZ/+ycoSYWr Wdi4K8jRevQkaZAG0BItwMrYv9mUDLdDlGcqZe70YHMpS1a1zTf9lNq1C5CGW3O5Gw eSNAFz7+GzyTw== Received: from sofa.misterjones.org ([185.219.108.64] helo=why.lan) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.95) (envelope-from ) id 1o987K-005h9i-RU; Wed, 06 Jul 2022 17:43:10 +0100 From: Marc Zyngier To: kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: James Morse , Suzuki K Poulose , Alexandru Elisei , Oliver Upton , Schspa Shi , kernel-team@android.com Subject: [PATCH 01/19] KVM: arm64: Add get_reg_by_id() as a sys_reg_desc retrieving helper Date: Wed, 6 Jul 2022 17:42:46 +0100 Message-Id: <20220706164304.1582687-2-maz@kernel.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220706164304.1582687-1-maz@kernel.org> References: <20220706164304.1582687-1-maz@kernel.org> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, james.morse@arm.com, suzuki.poulose@arm.com, alexandru.elisei@arm.com, oliver.upton@linux.dev, schspa@gmail.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 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220706_094314_258679_3966D87F X-CRM114-Status: GOOD ( 18.58 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org find_reg_by_id() requires a sys_reg_param as input, which most users provide as a on-stack variable, but don't make any use of the result. Provide a helper that doesn't have this requirement and simplify the callers (all but one). Signed-off-by: Marc Zyngier --- arch/arm64/kvm/sys_regs.c | 28 +++++++++++++++++----------- arch/arm64/kvm/sys_regs.h | 4 ++++ arch/arm64/kvm/vgic-sys-reg-v3.c | 8 ++------ 3 files changed, 23 insertions(+), 17 deletions(-) diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index c06c0477fab5..1f410283c592 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -2650,21 +2650,29 @@ const struct sys_reg_desc *find_reg_by_id(u64 id, return find_reg(params, table, num); } +const struct sys_reg_desc *get_reg_by_id(u64 id, + const struct sys_reg_desc table[], + unsigned int num) +{ + struct sys_reg_params params; + + if (!index_to_params(id, ¶ms)) + return NULL; + + return find_reg(¶ms, table, num); +} + /* Decode an index value, and find the sys_reg_desc entry. */ static const struct sys_reg_desc *index_to_sys_reg_desc(struct kvm_vcpu *vcpu, u64 id) { const struct sys_reg_desc *r; - struct sys_reg_params params; /* We only do sys_reg for now. */ if ((id & KVM_REG_ARM_COPROC_MASK) != KVM_REG_ARM64_SYSREG) return NULL; - if (!index_to_params(id, ¶ms)) - return NULL; - - r = find_reg(¶ms, sys_reg_descs, ARRAY_SIZE(sys_reg_descs)); + r = get_reg_by_id(id, sys_reg_descs, ARRAY_SIZE(sys_reg_descs)); /* Not saved in the sys_reg array and not otherwise accessible? */ if (r && !(r->reg || r->get_user)) @@ -2723,11 +2731,10 @@ static int reg_to_user(void __user *uaddr, const u64 *val, u64 id) static int get_invariant_sys_reg(u64 id, void __user *uaddr) { - struct sys_reg_params params; const struct sys_reg_desc *r; - r = find_reg_by_id(id, ¶ms, invariant_sys_regs, - ARRAY_SIZE(invariant_sys_regs)); + r = get_reg_by_id(id, invariant_sys_regs, + ARRAY_SIZE(invariant_sys_regs)); if (!r) return -ENOENT; @@ -2736,13 +2743,12 @@ static int get_invariant_sys_reg(u64 id, void __user *uaddr) static int set_invariant_sys_reg(u64 id, void __user *uaddr) { - struct sys_reg_params params; const struct sys_reg_desc *r; int err; u64 val = 0; /* Make sure high bits are 0 for 32-bit regs */ - r = find_reg_by_id(id, ¶ms, invariant_sys_regs, - ARRAY_SIZE(invariant_sys_regs)); + r = get_reg_by_id(id, invariant_sys_regs, + ARRAY_SIZE(invariant_sys_regs)); if (!r) return -ENOENT; diff --git a/arch/arm64/kvm/sys_regs.h b/arch/arm64/kvm/sys_regs.h index aee8ea054f0d..ce30ed9566ae 100644 --- a/arch/arm64/kvm/sys_regs.h +++ b/arch/arm64/kvm/sys_regs.h @@ -195,6 +195,10 @@ const struct sys_reg_desc *find_reg_by_id(u64 id, const struct sys_reg_desc table[], unsigned int num); +const struct sys_reg_desc *get_reg_by_id(u64 id, + const struct sys_reg_desc table[], + unsigned int num); + #define AA32(_x) .aarch32_map = AA32_##_x #define Op0(_x) .Op0 = _x #define Op1(_x) .Op1 = _x diff --git a/arch/arm64/kvm/vgic-sys-reg-v3.c b/arch/arm64/kvm/vgic-sys-reg-v3.c index 07d5271e9f05..644acda33c7c 100644 --- a/arch/arm64/kvm/vgic-sys-reg-v3.c +++ b/arch/arm64/kvm/vgic-sys-reg-v3.c @@ -263,14 +263,10 @@ static const struct sys_reg_desc gic_v3_icc_reg_descs[] = { int vgic_v3_has_cpu_sysregs_attr(struct kvm_vcpu *vcpu, bool is_write, u64 id, u64 *reg) { - struct sys_reg_params params; u64 sysreg = (id & KVM_DEV_ARM_VGIC_SYSREG_MASK) | KVM_REG_SIZE_U64; - params.regval = *reg; - params.is_write = is_write; - - if (find_reg_by_id(sysreg, ¶ms, gic_v3_icc_reg_descs, - ARRAY_SIZE(gic_v3_icc_reg_descs))) + if (get_reg_by_id(sysreg, gic_v3_icc_reg_descs, + ARRAY_SIZE(gic_v3_icc_reg_descs))) return 0; return -ENXIO; -- 2.34.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel