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 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 07971C47074 for ; Wed, 15 Nov 2023 07:17:28 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1r3A8g-0006Fo-Jy; Wed, 15 Nov 2023 02:16:42 -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 1r3A8V-0005rc-Jx for qemu-devel@nongnu.org; Wed, 15 Nov 2023 02:16:32 -0500 Received: from mgamail.intel.com ([192.55.52.115]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1r3A8R-0002AL-BQ for qemu-devel@nongnu.org; Wed, 15 Nov 2023 02:16:31 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1700032587; x=1731568587; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=evORccMxGNj9kfCyqrPxUNViOtAUirDGHDGwRU5h4KI=; b=gZonsXBb5zlkssg9KyowoBq2LHiNVCS1RgF6O69vNNXMfs+jZ/tYVzAr WE6w07ptzcyDPj5uluA8XPR03Bmey9PCynfg14ZYUhi4I+trHaFOMF49E G8Wu9J7bj/VkWs4boCS4xjlhbrLQg5oshRCC5RIZq7OfhE0mZiid6/J9+ fVWMjidcChr2/1AFrZg2YRaJOXT+RU9XPoAb9d+mvzQdVdGEElFFKbBWJ uYviWpUhW5rDE5kbVsJE0vwQpzLyCtOfzwnhhOCOVW1RFMIomM+mDPX6k xuDRtDtyrVXzlcR0ugbQGaWjWUE6iAXSgLR3j+m6LmuJxR0tIakuHzXnB Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10894"; a="390622131" X-IronPort-AV: E=Sophos;i="6.03,304,1694761200"; d="scan'208";a="390622131" Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Nov 2023 23:16:08 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10894"; a="714796917" X-IronPort-AV: E=Sophos;i="6.03,304,1694761200"; d="scan'208";a="714796917" Received: from lxy-clx-4s.sh.intel.com ([10.239.48.52]) by orsmga003.jf.intel.com with ESMTP; 14 Nov 2023 23:16:01 -0800 From: Xiaoyao Li To: Paolo Bonzini , David Hildenbrand , Igor Mammedov , "Michael S . Tsirkin" , Marcel Apfelbaum , Richard Henderson , Peter Xu , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Cornelia Huck , =?UTF-8?q?Daniel=20P=20=2E=20Berrang=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 v3 05/70] kvm: Enable KVM_SET_USER_MEMORY_REGION2 for memslot Date: Wed, 15 Nov 2023 02:14:14 -0500 Message-Id: <20231115071519.2864957-6-xiaoyao.li@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231115071519.2864957-1-xiaoyao.li@intel.com> References: <20231115071519.2864957-1-xiaoyao.li@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=192.55.52.115; envelope-from=xiaoyao.li@intel.com; helo=mgamail.intel.com X-Spam_score_int: -23 X-Spam_score: -2.4 X-Spam_bar: -- X-Spam_report: (-2.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, 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=0.999, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham 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 From: Chao Peng Switch to KVM_SET_USER_MEMORY_REGION2 when supported by KVM. With KVM_SET_USER_MEMORY_REGION2, QEMU can set up memory region that backend'ed both by hva-based shared memory and guest memfd based private memory. Signed-off-by: Chao Peng Co-developed-by: Xiaoyao Li Signed-off-by: Xiaoyao Li --- accel/kvm/kvm-all.c | 56 ++++++++++++++++++++++++++++++++++------ accel/kvm/trace-events | 2 +- include/sysemu/kvm_int.h | 2 ++ 3 files changed, 51 insertions(+), 9 deletions(-) diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c index 9f751d4971f8..69afeb47c9c0 100644 --- a/accel/kvm/kvm-all.c +++ b/accel/kvm/kvm-all.c @@ -293,35 +293,69 @@ int kvm_physical_memory_addr_from_host(KVMState *s, void *ram, static int kvm_set_user_memory_region(KVMMemoryListener *kml, KVMSlot *slot, bool new) { KVMState *s = kvm_state; - struct kvm_userspace_memory_region mem; + struct kvm_userspace_memory_region2 mem; + static int cap_user_memory2 = -1; int ret; + if (cap_user_memory2 == -1) { + cap_user_memory2 = kvm_check_extension(s, KVM_CAP_USER_MEMORY2); + } + + if (!cap_user_memory2 && slot->guest_memfd >= 0) { + error_report("%s, KVM doesn't support KVM_CAP_USER_MEMORY2," + " which is required by guest memfd!", __func__); + exit(1); + } + mem.slot = slot->slot | (kml->as_id << 16); mem.guest_phys_addr = slot->start_addr; mem.userspace_addr = (unsigned long)slot->ram; mem.flags = slot->flags; + mem.guest_memfd = slot->guest_memfd; + mem.guest_memfd_offset = slot->guest_memfd_offset; if (slot->memory_size && !new && (mem.flags ^ slot->old_flags) & KVM_MEM_READONLY) { /* Set the slot size to 0 before setting the slot to the desired * value. This is needed based on KVM commit 75d61fbc. */ mem.memory_size = 0; - ret = kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem); + + if (cap_user_memory2) { + ret = kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION2, &mem); + } else { + ret = kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem); + } if (ret < 0) { goto err; } } mem.memory_size = slot->memory_size; - ret = kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem); + if (cap_user_memory2) { + ret = kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION2, &mem); + } else { + ret = kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem); + } slot->old_flags = mem.flags; err: trace_kvm_set_user_memory(mem.slot >> 16, (uint16_t)mem.slot, mem.flags, mem.guest_phys_addr, mem.memory_size, - mem.userspace_addr, ret); + mem.userspace_addr, mem.guest_memfd, + mem.guest_memfd_offset, ret); if (ret < 0) { - error_report("%s: KVM_SET_USER_MEMORY_REGION failed, slot=%d," - " start=0x%" PRIx64 ", size=0x%" PRIx64 ": %s", - __func__, mem.slot, slot->start_addr, - (uint64_t)mem.memory_size, strerror(errno)); + if (cap_user_memory2) { + error_report("%s: KVM_SET_USER_MEMORY_REGION2 failed, slot=%d," + " start=0x%" PRIx64 ", size=0x%" PRIx64 "," + " flags=0x%" PRIx32 ", guest_memfd=%" PRId32 "," + " guest_memfd_offset=0x%" PRIx64 ": %s", + __func__, mem.slot, slot->start_addr, + (uint64_t)mem.memory_size, mem.flags, + mem.guest_memfd, (uint64_t)mem.guest_memfd_offset, + strerror(errno)); + } else { + error_report("%s: KVM_SET_USER_MEMORY_REGION failed, slot=%d," + " start=0x%" PRIx64 ", size=0x%" PRIx64 ": %s", + __func__, mem.slot, slot->start_addr, + (uint64_t)mem.memory_size, strerror(errno)); + } } return ret; } @@ -477,6 +511,9 @@ static int kvm_mem_flags(MemoryRegion *mr) if (readonly && kvm_readonly_mem_allowed) { flags |= KVM_MEM_READONLY; } + if (memory_region_has_guest_memfd(mr)) { + flags |= KVM_MEM_PRIVATE; + } return flags; } @@ -1364,6 +1401,9 @@ static void kvm_set_phys_mem(KVMMemoryListener *kml, mem->ram_start_offset = ram_start_offset; mem->ram = ram; mem->flags = kvm_mem_flags(mr); + mem->guest_memfd = mr->ram_block->guest_memfd; + mem->guest_memfd_offset = (uint8_t*)ram - mr->ram_block->host; + kvm_slot_init_dirty_bitmap(mem); err = kvm_set_user_memory_region(kml, mem, true); if (err) { diff --git a/accel/kvm/trace-events b/accel/kvm/trace-events index 14ebfa1b991c..e6ec2cda6efa 100644 --- a/accel/kvm/trace-events +++ b/accel/kvm/trace-events @@ -15,7 +15,7 @@ kvm_irqchip_update_msi_route(int virq) "Updating MSI route virq=%d" kvm_irqchip_release_virq(int virq) "virq %d" kvm_set_ioeventfd_mmio(int fd, uint64_t addr, uint32_t val, bool assign, uint32_t size, bool datamatch) "fd: %d @0x%" PRIx64 " val=0x%x assign: %d size: %d match: %d" kvm_set_ioeventfd_pio(int fd, uint16_t addr, uint32_t val, bool assign, uint32_t size, bool datamatch) "fd: %d @0x%x val=0x%x assign: %d size: %d match: %d" -kvm_set_user_memory(uint16_t as, uint16_t slot, uint32_t flags, uint64_t guest_phys_addr, uint64_t memory_size, uint64_t userspace_addr, int ret) "AddrSpace#%d Slot#%d flags=0x%x gpa=0x%"PRIx64 " size=0x%"PRIx64 " ua=0x%"PRIx64 " ret=%d" +kvm_set_user_memory(uint16_t as, uint16_t slot, uint32_t flags, uint64_t guest_phys_addr, uint64_t memory_size, uint64_t userspace_addr, uint32_t fd, uint64_t fd_offset, int ret) "AddrSpace#%d Slot#%d flags=0x%x gpa=0x%"PRIx64 " size=0x%"PRIx64 " ua=0x%"PRIx64 " guest_memfd=%d" " guest_memfd_offset=0x%" PRIx64 " ret=%d" kvm_clear_dirty_log(uint32_t slot, uint64_t start, uint32_t size) "slot#%"PRId32" start 0x%"PRIx64" size 0x%"PRIx32 kvm_resample_fd_notify(int gsi) "gsi %d" kvm_dirty_ring_full(int id) "vcpu %d" diff --git a/include/sysemu/kvm_int.h b/include/sysemu/kvm_int.h index fd846394be10..58b7aa3fc786 100644 --- a/include/sysemu/kvm_int.h +++ b/include/sysemu/kvm_int.h @@ -30,6 +30,8 @@ typedef struct KVMSlot int as_id; /* Cache of the offset in ram address space */ ram_addr_t ram_start_offset; + int guest_memfd; + hwaddr guest_memfd_offset; } KVMSlot; typedef struct KVMMemoryUpdate { -- 2.34.1