From nobody Sun Apr 12 15:25:09 2026 Delivered-To: importer2@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer2=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1713885404; cv=none; d=zohomail.com; s=zohoarc; b=RbWV52Aquv9hrBGhHh+tpJCRhSLwx70jq1/mQZdBUKFITBxsFqlkOZgfN+Ns5FD978TbSaHon1xPp75+o8QmItud08E3/jCKIxkdEO9XbbOKto0saHvCWjpv+ZtGyHt9Rdj0Yg5Q7qvQeuPklvgxCVuM2GfXXM6Ugcw5bKEP64c= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1713885404; h=Content-Type:Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=lQJwjo3MXJ2GLvfT58cL52JHn1dy1ZgsvaXXLt6dS1k=; b=LsJgLkSIaN4C2an7dp5mrOi+N0h9N7fxvFAG6Xm/yw+yB07/T+9VvWx152eVA/wtqCQuysmr6Si13dchHDDdH6CeI6vce5zRNNkN/bNOJJ42PzZ6EvvcPbiT25Cveb7XxP37V7avXQXYV2+bH/mYB+2JqshYeB4fPbnsdkZqTl8= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer2=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 17138854042161020.0662642037192; Tue, 23 Apr 2024 08:16:44 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rzHnW-0006WD-IL; Tue, 23 Apr 2024 11:11:06 -0400 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 1rzHnE-0004ra-OL for qemu-devel@nongnu.org; Tue, 23 Apr 2024 11:10:48 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rzHnC-0000J7-AH for qemu-devel@nongnu.org; Tue, 23 Apr 2024 11:10:48 -0400 Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-68-eunfK8dIOxWgz6ER5LdubA-1; Tue, 23 Apr 2024 11:10:43 -0400 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 9E0DE812C54; Tue, 23 Apr 2024 15:10:42 +0000 (UTC) Received: from avogadro.lan (unknown [10.39.192.70]) by smtp.corp.redhat.com (Postfix) with ESMTP id EAF2A2026D0A; Tue, 23 Apr 2024 15:10:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1713885044; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=lQJwjo3MXJ2GLvfT58cL52JHn1dy1ZgsvaXXLt6dS1k=; b=HQ1ji6fv4XHGALDx28cNVRKVc0Hd8pePw05pYaBzwJDGeyg+JPyLtCmvmPlf3KOBR1h7PZ vJe4QvgR47RdTa4bd6C72LbTvCi8jLagnyu5wREQU2j4ISFw+ySPMOtYJ4lrthCDxet2h5 qaWNvpyMf3ta8XQcbzlTRE5+ZBZu9Sg= X-MC-Unique: eunfK8dIOxWgz6ER5LdubA-1 From: Paolo Bonzini To: qemu-devel@nongnu.org Cc: Chao Peng , Xiaoyao Li Subject: [PULL 50/63] kvm: Enable KVM_SET_USER_MEMORY_REGION2 for memslot Date: Tue, 23 Apr 2024 17:09:38 +0200 Message-ID: <20240423150951.41600-51-pbonzini@redhat.com> In-Reply-To: <20240423150951.41600-1-pbonzini@redhat.com> References: <20240423150951.41600-1-pbonzini@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.4 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+importer2=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.133.124; envelope-from=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.67, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 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+importer2=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer2=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1713885405436100019 Content-Type: text/plain; charset="utf-8" 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 Message-ID: <20240320083945.991426-10-michael.roth@amd.com> Signed-off-by: Paolo Bonzini --- include/sysemu/kvm_int.h | 2 ++ accel/kvm/kvm-all.c | 46 +++++++++++++++++++++++++++++++++------- accel/kvm/trace-events | 2 +- 3 files changed, 41 insertions(+), 9 deletions(-) diff --git a/include/sysemu/kvm_int.h b/include/sysemu/kvm_int.h index 227b61fec3d..3f3d13f8166 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; =20 typedef struct KVMMemoryUpdate { diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c index 1b7bbd838c4..0386d4901fa 100644 --- a/accel/kvm/kvm-all.c +++ b/accel/kvm/kvm-all.c @@ -284,35 +284,58 @@ int kvm_physical_memory_addr_from_host(KVMState *s, v= oid *ram, static int kvm_set_user_memory_region(KVMMemoryListener *kml, KVMSlot *slo= t, bool new) { KVMState *s =3D kvm_state; - struct kvm_userspace_memory_region mem; + struct kvm_userspace_memory_region2 mem; int ret; =20 mem.slot =3D slot->slot | (kml->as_id << 16); mem.guest_phys_addr =3D slot->start_addr; mem.userspace_addr =3D (unsigned long)slot->ram; mem.flags =3D slot->flags; + mem.guest_memfd =3D slot->guest_memfd; + mem.guest_memfd_offset =3D slot->guest_memfd_offset; =20 if (slot->memory_size && !new && (mem.flags ^ slot->old_flags) & KVM_M= EM_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 =3D 0; - ret =3D kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem); + + if (kvm_guest_memfd_supported) { + ret =3D kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION2, &mem); + } else { + ret =3D kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem); + } if (ret < 0) { goto err; } } mem.memory_size =3D slot->memory_size; - ret =3D kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem); + if (kvm_guest_memfd_supported) { + ret =3D kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION2, &mem); + } else { + ret =3D kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem); + } slot->old_flags =3D mem.flags; err: trace_kvm_set_user_memory(mem.slot >> 16, (uint16_t)mem.slot, mem.flag= s, 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=3D%d," - " start=3D0x%" PRIx64 ", size=3D0x%" PRIx64 ": %s", - __func__, mem.slot, slot->start_addr, - (uint64_t)mem.memory_size, strerror(errno)); + if (kvm_guest_memfd_supported) { + error_report("%s: KVM_SET_USER_MEMORY_REGION2 failed, slot= =3D%d," + " start=3D0x%" PRIx64 ", size=3D0x%" PRIx64 "," + " flags=3D0x%" PRIx32 ", guest_memfd=3D%" PRId32 "= ," + " guest_memfd_offset=3D0x%" 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= =3D%d," + " start=3D0x%" PRIx64 ", size=3D0x%" PRIx64 ":= %s", + __func__, mem.slot, slot->start_addr, + (uint64_t)mem.memory_size, strerror(errno)); + } } return ret; } @@ -467,6 +490,10 @@ static int kvm_mem_flags(MemoryRegion *mr) if (readonly && kvm_readonly_mem_allowed) { flags |=3D KVM_MEM_READONLY; } + if (memory_region_has_guest_memfd(mr)) { + assert(kvm_guest_memfd_supported); + flags |=3D KVM_MEM_GUEST_MEMFD; + } return flags; } =20 @@ -1394,6 +1421,9 @@ static void kvm_set_phys_mem(KVMMemoryListener *kml, mem->ram_start_offset =3D ram_start_offset; mem->ram =3D ram; mem->flags =3D kvm_mem_flags(mr); + mem->guest_memfd =3D mr->ram_block->guest_memfd; + mem->guest_memfd_offset =3D (uint8_t*)ram - mr->ram_block->host; + kvm_slot_init_dirty_bitmap(mem); err =3D kvm_set_user_memory_region(kml, mem, true); if (err) { diff --git a/accel/kvm/trace-events b/accel/kvm/trace-events index 9f599abc172..e8c52cb9e7a 100644 --- a/accel/kvm/trace-events +++ b/accel/kvm/trace-events @@ -15,7 +15,7 @@ kvm_irqchip_update_msi_route(int virq) "Updating MSI rout= e virq=3D%d" kvm_irqchip_release_virq(int virq) "virq %d" kvm_set_ioeventfd_mmio(int fd, uint64_t addr, uint32_t val, bool assign, u= int32_t size, bool datamatch) "fd: %d @0x%" PRIx64 " val=3D0x%x assign: %d = size: %d match: %d" kvm_set_ioeventfd_pio(int fd, uint16_t addr, uint32_t val, bool assign, ui= nt32_t size, bool datamatch) "fd: %d @0x%x val=3D0x%x assign: %d size: %d m= atch: %d" -kvm_set_user_memory(uint16_t as, uint16_t slot, uint32_t flags, uint64_t g= uest_phys_addr, uint64_t memory_size, uint64_t userspace_addr, int ret) "Ad= drSpace#%d Slot#%d flags=3D0x%x gpa=3D0x%"PRIx64 " size=3D0x%"PRIx64 " ua= =3D0x%"PRIx64 " ret=3D%d" +kvm_set_user_memory(uint16_t as, uint16_t slot, uint32_t flags, uint64_t g= uest_phys_addr, uint64_t memory_size, uint64_t userspace_addr, uint32_t fd,= uint64_t fd_offset, int ret) "AddrSpace#%d Slot#%d flags=3D0x%x gpa=3D0x%"= PRIx64 " size=3D0x%"PRIx64 " ua=3D0x%"PRIx64 " guest_memfd=3D%d" " guest_me= mfd_offset=3D0x%" PRIx64 " ret=3D%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" --=20 2.44.0