From patchwork Tue Sep 28 18:47:55 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ricardo Koller X-Patchwork-Id: 12523553 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 014EAC433FE for ; Tue, 28 Sep 2021 18:48:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E028E61209 for ; Tue, 28 Sep 2021 18:48:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242289AbhI1Stv (ORCPT ); Tue, 28 Sep 2021 14:49:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56300 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242237AbhI1Stt (ORCPT ); Tue, 28 Sep 2021 14:49:49 -0400 Received: from mail-qv1-xf4a.google.com (mail-qv1-xf4a.google.com [IPv6:2607:f8b0:4864:20::f4a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AC185C06161C for ; Tue, 28 Sep 2021 11:48:09 -0700 (PDT) Received: by mail-qv1-xf4a.google.com with SMTP id v10-20020ad4554a000000b0038250b18b6dso56828463qvy.12 for ; Tue, 28 Sep 2021 11:48:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=O4Pf1pw7IvGHNe4ix1iHuqBRwQM1rzQrtDbARj3VD7U=; b=mMMdCpyyOz9jvXo89g2rQ6b6Nh948to1i5C3FcPkKL21khzd0SJnqxQR4pkyDMx9wa s0O07AEGyGZovHoZMQWntxZ96N3sLH8ged8VBIMRL3FOXckb8dsewQN2qvTmew6Mg8p0 Oolh9VInTIJlL5VZaT2EXghb9fy5iK+ewpnw//GSA/9/OPPM46+sSBbZ8QpqsfcCDI0L hnzvrBsCQu6n04TqU7WBQFmmglwGBFckLdXNTpAVz4Yjxd4GOGyU9lwF+ghdGzg0WUiz iB4cEZyX1mFt8GkSsJB84Cquma2SBzV8D+IDLTJmPek45HdWNKnpiemLZlZf80Badjv/ 6dBQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=O4Pf1pw7IvGHNe4ix1iHuqBRwQM1rzQrtDbARj3VD7U=; b=5NHPdyjwTFJQ8PRLC+oaEmPssAcgrTUcUavkHMSQ3RAqvYjXHlZZVKQQHXYHzf7Ndb J9qg3P/YpdF5gdh9eZiu4LZEiagzTGTCzoqYOyp1fvZqUupwNmfEYVgsKO9ztxzU8gqB w3GVZyxtrxS5x51LnEXvffy1X9c3cI50c5WxXXbpGP7IaYinzyyF1WnSThboaklECoe0 EseD23vPQRgGgezS3aoKZZTLBIaMKxAMiuE9MExXxBsgTVXmrbeDPFOcvgibw4HZyZDP ekM2goHhmpq4k0sB4nnPvVVbnilKHvvjRoPwrzDaM9w+HJs1pJghDdemWd1zUCVVqJSK EBmw== X-Gm-Message-State: AOAM533JmO+KnDMwOb0WAtFvzunKxxMCj0rUL/EkIV9UmoVUMND2ACFo 9DCsLIHkctJYoqdjxKTimgTD7GL0aO8xepKzwQirA+UcjZJh3YLnO9L0WtSKWe7xuMlAsprFExY SmUi8EKzOAJ/5IgB7gLEOx5/Xs1Poss4oAo9Riw/m1X3AgN7bbJZQJylDW0bQNwE= X-Google-Smtp-Source: ABdhPJx5jNcltOLTjTdhqpjP1Bl4mvZcRKZjKlWdl3zBsvmwrNHy7AtNptUT7fjtgYO1crNJzy1+li0z/78wjg== X-Received: from ricarkol2.c.googlers.com ([fda3:e722:ac3:cc00:24:72f4:c0a8:62fe]) (user=ricarkol job=sendgmr) by 2002:ad4:4a02:: with SMTP id m2mr164765qvz.8.1632854888735; Tue, 28 Sep 2021 11:48:08 -0700 (PDT) Date: Tue, 28 Sep 2021 11:47:55 -0700 In-Reply-To: <20210928184803.2496885-1-ricarkol@google.com> Message-Id: <20210928184803.2496885-2-ricarkol@google.com> Mime-Version: 1.0 References: <20210928184803.2496885-1-ricarkol@google.com> X-Mailer: git-send-email 2.33.0.685.g46640cef36-goog Subject: [PATCH v3 01/10] kvm: arm64: vgic: Introduce vgic_check_iorange From: Ricardo Koller To: kvm@vger.kernel.org, maz@kernel.org, kvmarm@lists.cs.columbia.edu, drjones@redhat.com, eric.auger@redhat.com, alexandru.elisei@arm.com Cc: Paolo Bonzini , oupton@google.com, james.morse@arm.com, suzuki.poulose@arm.com, shuah@kernel.org, jingzhangos@google.com, pshier@google.com, rananta@google.com, reijiw@google.com, Ricardo Koller Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Add the new vgic_check_iorange helper that checks that an iorange is sane: the start address and size have valid alignments, the range is within the addressable PA range, start+size doesn't overflow, and the start wasn't already defined. No functional change. Signed-off-by: Ricardo Koller Reviewed-by: Eric Auger --- arch/arm64/kvm/vgic/vgic-kvm-device.c | 22 ++++++++++++++++++++++ arch/arm64/kvm/vgic/vgic.h | 4 ++++ 2 files changed, 26 insertions(+) diff --git a/arch/arm64/kvm/vgic/vgic-kvm-device.c b/arch/arm64/kvm/vgic/vgic-kvm-device.c index 7740995de982..f714aded67b2 100644 --- a/arch/arm64/kvm/vgic/vgic-kvm-device.c +++ b/arch/arm64/kvm/vgic/vgic-kvm-device.c @@ -29,6 +29,28 @@ int vgic_check_ioaddr(struct kvm *kvm, phys_addr_t *ioaddr, return 0; } +int vgic_check_iorange(struct kvm *kvm, phys_addr_t *ioaddr, + phys_addr_t addr, phys_addr_t alignment, + phys_addr_t size) +{ + int ret; + + ret = vgic_check_ioaddr(kvm, ioaddr, addr, alignment); + if (ret) + return ret; + + if (!IS_ALIGNED(size, alignment)) + return -EINVAL; + + if (addr + size < addr) + return -EINVAL; + + if (addr + size > kvm_phys_size(kvm)) + return -E2BIG; + + return 0; +} + static int vgic_check_type(struct kvm *kvm, int type_needed) { if (kvm->arch.vgic.vgic_model != type_needed) diff --git a/arch/arm64/kvm/vgic/vgic.h b/arch/arm64/kvm/vgic/vgic.h index 14a9218641f5..c4df4dcef31f 100644 --- a/arch/arm64/kvm/vgic/vgic.h +++ b/arch/arm64/kvm/vgic/vgic.h @@ -175,6 +175,10 @@ void vgic_irq_handle_resampling(struct vgic_irq *irq, int vgic_check_ioaddr(struct kvm *kvm, phys_addr_t *ioaddr, phys_addr_t addr, phys_addr_t alignment); +int vgic_check_iorange(struct kvm *kvm, phys_addr_t *ioaddr, + phys_addr_t addr, phys_addr_t alignment, + phys_addr_t size); + void vgic_v2_fold_lr_state(struct kvm_vcpu *vcpu); void vgic_v2_populate_lr(struct kvm_vcpu *vcpu, struct vgic_irq *irq, int lr); void vgic_v2_clear_lr(struct kvm_vcpu *vcpu, int lr);