From patchwork Thu Jan 25 03:22:28 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xiaoyao Li X-Patchwork-Id: 13529952 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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (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 D83C6C47258 for ; Thu, 25 Jan 2024 03:33:28 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rSqPY-00035a-QH; Wed, 24 Jan 2024 22:28:16 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rSqPW-00034H-KF for qemu-devel@nongnu.org; Wed, 24 Jan 2024 22:28:14 -0500 Received: from mgamail.intel.com ([192.198.163.10]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rSqPU-0001Dr-Eq for qemu-devel@nongnu.org; Wed, 24 Jan 2024 22:28:14 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1706153292; x=1737689292; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=8AoHBD7YPJCeSiiafbeRxLUlYdqPOgOF84h3ug2/0pE=; b=RwLUeWSaJC2JaKiXj252NmO4p5XT7BxnUVmgeeo1UBfS1jxO7vo8SxLf /NhqXEfei6DUHsNt6YtWK8lteunnFwx5DBeeyY1QGsYjQyKH7dHLeNw32 DPlET71b0IGxU61KOKO7BICOXTPVMtmHvPYe36YRw7p84G4h4yfJasmG+ uycFMXNBTSHhr/Yav0N3QbCy20aw53VuJjhbl0EuxWepcryAO+x3UvylV 0JYacpMWj9eYSlJtwtydOWRXf4SEJv6U3N6/WOSnf/ypZOEO4yjJfdBzk csmo+k1/nyvYi0BhsucoWYHdGnc5dmd06kwQ7CY0Jkg2QRqDEeCHqb7tL w==; X-IronPort-AV: E=McAfee;i="6600,9927,10962"; a="9427961" X-IronPort-AV: E=Sophos;i="6.05,216,1701158400"; d="scan'208";a="9427961" Received: from orviesa005.jf.intel.com ([10.64.159.145]) by fmvoesa104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Jan 2024 19:24:10 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.05,216,1701158400"; d="scan'208";a="2084576" Received: from lxy-clx-4s.sh.intel.com ([10.239.48.52]) by orviesa005.jf.intel.com with ESMTP; 24 Jan 2024 19:24:05 -0800 From: Xiaoyao Li To: Paolo Bonzini , David Hildenbrand , Igor Mammedov , "Michael S . Tsirkin" , Marcel Apfelbaum , Richard Henderson , Peter Xu , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Cornelia Huck , =?utf-8?q?Daniel_P_=2E_Berrang=C3=A9?= , Eric Blake , Markus Armbruster , Marcelo Tosatti Cc: qemu-devel@nongnu.org, kvm@vger.kernel.org, xiaoyao.li@intel.com, Michael Roth , Sean Christopherson , Claudio Fontana , Gerd Hoffmann , Isaku Yamahata , Chenyi Qiang Subject: [PATCH v4 06/66] kvm: Introduce support for memory_attributes Date: Wed, 24 Jan 2024 22:22:28 -0500 Message-Id: <20240125032328.2522472-7-xiaoyao.li@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240125032328.2522472-1-xiaoyao.li@intel.com> References: <20240125032328.2522472-1-xiaoyao.li@intel.com> MIME-Version: 1.0 Received-SPF: pass client-ip=192.198.163.10; envelope-from=xiaoyao.li@intel.com; helo=mgamail.intel.com X-Spam_score_int: -15 X-Spam_score: -1.6 X-Spam_bar: - X-Spam_report: (-1.6 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.5, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, HK_RANDOM_ENVFROM=0.999, HK_RANDOM_FROM=1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Introduce the helper functions to set the attributes of a range of memory to private or shared. This is necessary to notify KVM the private/shared attribute of each gpa range. KVM needs the information to decide the GPA needs to be mapped at hva-based shared memory or guest_memfd based private memory. Signed-off-by: Xiaoyao Li --- Changes in v4: - move the check of kvm_supported_memory_attributes to the common kvm_set_memory_attributes(); (Wang Wei) - change warn_report() to error_report() in kvm_set_memory_attributes() and drop the __func__; (Daniel) --- accel/kvm/kvm-all.c | 44 ++++++++++++++++++++++++++++++++++++++++++++ include/sysemu/kvm.h | 3 +++ 2 files changed, 47 insertions(+) diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c index 50c10becf772..3bc78a16b48d 100644 --- a/accel/kvm/kvm-all.c +++ b/accel/kvm/kvm-all.c @@ -92,6 +92,7 @@ static bool kvm_has_guest_debug; static int kvm_sstep_flags; static bool kvm_immediate_exit; static bool kvm_guest_memfd_supported; +static uint64_t kvm_supported_memory_attributes; static hwaddr kvm_max_slot_size = ~0; static const KVMCapabilityInfo kvm_required_capabilites[] = { @@ -1294,6 +1295,46 @@ void kvm_set_max_memslot_size(hwaddr max_slot_size) kvm_max_slot_size = max_slot_size; } +static int kvm_set_memory_attributes(hwaddr start, hwaddr size, uint64_t attr) +{ + struct kvm_memory_attributes attrs; + int r; + + if (kvm_supported_memory_attributes == 0) { + error_report("No memory attribute supported by KVM\n"); + return -EINVAL; + } + + if ((attr & kvm_supported_memory_attributes) != attr) { + error_report("memory attribute 0x%lx not supported by KVM," + " supported bits are 0x%lx\n", + attr, kvm_supported_memory_attributes); + return -EINVAL; + } + + attrs.attributes = attr; + attrs.address = start; + attrs.size = size; + attrs.flags = 0; + + r = kvm_vm_ioctl(kvm_state, KVM_SET_MEMORY_ATTRIBUTES, &attrs); + if (r) { + error_report("failed to set memory (0x%lx+%#zx) with attr 0x%lx error '%s'", + start, size, attr, strerror(errno)); + } + return r; +} + +int kvm_set_memory_attributes_private(hwaddr start, hwaddr size) +{ + return kvm_set_memory_attributes(start, size, KVM_MEMORY_ATTRIBUTE_PRIVATE); +} + +int kvm_set_memory_attributes_shared(hwaddr start, hwaddr size) +{ + return kvm_set_memory_attributes(start, size, 0); +} + /* Called with KVMMemoryListener.slots_lock held */ static void kvm_set_phys_mem(KVMMemoryListener *kml, MemoryRegionSection *section, bool add) @@ -2429,6 +2470,9 @@ static int kvm_init(MachineState *ms) kvm_guest_memfd_supported = kvm_check_extension(s, KVM_CAP_GUEST_MEMFD); + ret = kvm_check_extension(s, KVM_CAP_MEMORY_ATTRIBUTES); + kvm_supported_memory_attributes = ret > 0 ? ret : 0; + if (object_property_find(OBJECT(current_machine), "kvm-type")) { g_autofree char *kvm_type = object_property_get_str(OBJECT(current_machine), "kvm-type", diff --git a/include/sysemu/kvm.h b/include/sysemu/kvm.h index fedc28c7d17f..0e88958190a4 100644 --- a/include/sysemu/kvm.h +++ b/include/sysemu/kvm.h @@ -540,4 +540,7 @@ bool kvm_dirty_ring_enabled(void); uint32_t kvm_dirty_ring_size(void); int kvm_create_guest_memfd(uint64_t size, uint64_t flags, Error **errp); + +int kvm_set_memory_attributes_private(hwaddr start, hwaddr size); +int kvm_set_memory_attributes_shared(hwaddr start, hwaddr size); #endif