From nobody Mon Feb 9 18:46:16 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=intel.com ARC-Seal: i=1; a=rsa-sha256; t=1585901846; cv=none; d=zohomail.com; s=zohoarc; b=GpQvk6esmGt4PDhjQbkDSwrwGua3fWNUCSqvcLywcpUk7XuTj8KruTPelw9AZ8Y2q0YWnabZLE6obVP77Ju0+P4YKB/qMpSQNY5m49Nw8Pzo8hhxonlhjONcNsGFPKFIMoGi4GlpyG6k4cfKRXI6U115dhm05b3Wh9PJs8VzpgA= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1585901846; h=Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:Message-ID:References:Sender:Subject:To; bh=ZYqxq9KR6NkWfqFxXwOrk0e3evu8rK7aJSoz1YqsRrM=; b=DbI9QFXzs14dSaol218YVd90GKWDAHmzzWE/CGzPsOBgiIjpexdBoyzm0qkXlFC2nDK5eNvsrl3g3f1wUmwb6k8sJ2LUnZebEA9brSIrSZKdOBuNocmMP2A75yUFCtlFoaxBEruSFelY5wKoeJZOVCqKlywPeUYONRAxG+QZ0DE= ARC-Authentication-Results: i=1; mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1585901846052236.39970201154222; Fri, 3 Apr 2020 01:17:26 -0700 (PDT) Received: from localhost ([::1]:51914 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jKHW0-0003gh-Pz for importer@patchew.org; Fri, 03 Apr 2020 04:17:24 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:43256) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jKHOB-0000Gh-CK for qemu-devel@nongnu.org; Fri, 03 Apr 2020 04:09:20 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1jKHOA-0005EE-8v for qemu-devel@nongnu.org; Fri, 03 Apr 2020 04:09:19 -0400 Received: from mga06.intel.com ([134.134.136.31]:40898) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1jKHOA-0005AA-1H for qemu-devel@nongnu.org; Fri, 03 Apr 2020 04:09:18 -0400 Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 03 Apr 2020 01:09:16 -0700 Received: from dpdk-zhirun.sh.intel.com ([10.67.119.121]) by fmsmga005.fm.intel.com with ESMTP; 03 Apr 2020 01:09:14 -0700 IronPort-SDR: 3c4DT0r95L3YtVbtrdTUS9ffbocSJSzGf7lqzPlmLEkIm0IVwcJjmMzEjJ7qXR6lY9L8UDOPF8 yiB+jyA6gT2Q== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False IronPort-SDR: fIS0PF+hklhkYKwVjVhh7AJA5u68tJhTT7NTZjOzr8I3lE0WjxyaHPPYf+kpObmZdAdr/7Oy5T Rcg5gTSF10Sg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.72,339,1580803200"; d="scan'208";a="449943973" From: Yan Zhao To: qemu-devel@nongnu.org Subject: [PATCH v2 1/3] memory: drop guest writes to read-only ram device regions Date: Fri, 3 Apr 2020 16:59:18 +0000 Message-Id: <20200403165918.20625-1-yan.y.zhao@intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200403165657.20566-1-yan.y.zhao@intel.com> References: <20200403165657.20566-1-yan.y.zhao@intel.com> X-detected-operating-system: by eggs.gnu.org: FreeBSD 9.x [fuzzy] X-Received-From: 134.134.136.31 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Yan Zhao , pbonzini@redhat.com, alex.williamson@redhat.com, philmd@redhat.com, xin.zeng@intel.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" for ram device regions, drop guest writes if the regions is read-only. Signed-off-by: Yan Zhao Signed-off-by: Xin Zeng --- memory.c | 6 +++++- trace-events | 2 +- 2 files changed, 6 insertions(+), 2 deletions(-) diff --git a/memory.c b/memory.c index 601b749906..a380b59980 100644 --- a/memory.c +++ b/memory.c @@ -1312,7 +1312,11 @@ static void memory_region_ram_device_write(void *opa= que, hwaddr addr, { MemoryRegion *mr =3D opaque; =20 - trace_memory_region_ram_device_write(get_cpu_index(), mr, addr, data, = size); + trace_memory_region_ram_device_write(get_cpu_index(), mr, addr, data, + size, mr->readonly); + if (mr->readonly) { + return; + } =20 switch (size) { case 1: diff --git a/trace-events b/trace-events index 42107ebc69..e1de662973 100644 --- a/trace-events +++ b/trace-events @@ -61,7 +61,7 @@ memory_region_ops_write(int cpu_index, void *mr, uint64_t= addr, uint64_t value, memory_region_subpage_read(int cpu_index, void *mr, uint64_t offset, uint6= 4_t value, unsigned size) "cpu %d mr %p offset 0x%"PRIx64" value 0x%"PRIx64= " size %u" memory_region_subpage_write(int cpu_index, void *mr, uint64_t offset, uint= 64_t value, unsigned size) "cpu %d mr %p offset 0x%"PRIx64" value 0x%"PRIx6= 4" size %u" memory_region_ram_device_read(int cpu_index, void *mr, uint64_t addr, uint= 64_t value, unsigned size) "cpu %d mr %p addr 0x%"PRIx64" value 0x%"PRIx64"= size %u" -memory_region_ram_device_write(int cpu_index, void *mr, uint64_t addr, uin= t64_t value, unsigned size) "cpu %d mr %p addr 0x%"PRIx64" value 0x%"PRIx64= " size %u" +memory_region_ram_device_write(int cpu_index, void *mr, uint64_t addr, uin= t64_t value, unsigned size, bool readonly) "cpu %d mr %p addr 0x%"PRIx64" v= alue 0x%"PRIx64" size %u" " is_readonly_region=3D%d" flatview_new(void *view, void *root) "%p (root %p)" flatview_destroy(void *view, void *root) "%p (root %p)" flatview_destroy_rcu(void *view, void *root) "%p (root %p)" --=20 2.17.1