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[99.254.114.190]) by smtp.gmail.com with ESMTPSA id ca18e2360f4ac-83503aacb18sm220272039f.30.2024.10.09.05.42.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 09 Oct 2024 05:42:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1728477767; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=XQt31NpoPy1kBmextgAReCNHDW1SSJ1uheANHNAwqA8=; b=a5Mgr6hna2dB/llbKsX+6O8qlrCwwmLrF/NyPWhXSk9dPO8H8JUo0nr4Ax+uQJdaNaqHut QQuirSKXdVOjmcLdUjGPdC2spEPEjzZQhF/WMhtMYWzNhRHEAai31xOLBZ2gr5RNgZIATS /VVrClXtdIc1rFzxE0azubqHkgoWKMw= X-MC-Unique: EDqaR26GMfuZOmhGzLohXA-1 X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1728477763; x=1729082563; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=XQt31NpoPy1kBmextgAReCNHDW1SSJ1uheANHNAwqA8=; b=w2KXdjJ4npJYn6bpBxNEvLLM6GRJPBMvRau/ygXi3/2oZenL9/Z/yxtJcqF5YSllmi n+SwVs8Ya2YQ3sLOb61MMyeP8sftyuBSj1zqHcbUUb4QcO3d/yAqqyuBavErNKXpfCqD 3dRXKerX5XRWxmD2wtZ/vasuPSNIAodD7xyVK/wLGfUCH4i8OsJk/mYsbEQLDgOedy3c n3wVPuf/d0UbIoGIPY3qDeOR3q9f/jKDlZwbioZXPLazMDpkY9CwllGCS3bvdDTAO/Yt un2o11S5zQHdNO1X3crM/Zx5o7BzPrIDbNZef3CNJJVZHYeNgFUABfiTh6QoS3Lf44dA 3zww== X-Gm-Message-State: AOJu0YzVv9bLr8PiCwVmZzX1LkSUJqYKcusuRtrAIHIoF4p6qsg6K3g6 uMD41YtdTCW+dc48G6PEzHaY0RSDqqBwM3HM82/zQwuTBHFuUYgT2fIsCDBXvcfpalKV9wQ+cEj +aUOn1opRpyVrCFiAMAJGSUXMi1iMJSUEPye/vgoGJaxqRFXsrCzdqQMEosPkpe5VqHKSOj5GM/ pM+2WUfn7g/IRVme5u2D6fmYr5VPJ4eDATug== X-Received: by 2002:a05:6602:634c:b0:835:444b:6195 with SMTP id ca18e2360f4ac-835444b6394mr116201839f.14.1728477763149; Wed, 09 Oct 2024 05:42:43 -0700 (PDT) X-Google-Smtp-Source: AGHT+IFMSa2FsTMWN2FK2YGvoOW+MMGKxTusV922goBugNpfYw+prMZ0kJvuRsgvymmt7QWIiva++Q== X-Received: by 2002:a05:6602:634c:b0:835:444b:6195 with SMTP id ca18e2360f4ac-835444b6394mr116199039f.14.1728477762748; Wed, 09 Oct 2024 05:42:42 -0700 (PDT) From: Peter Xu To: qemu-devel@nongnu.org Cc: Peter Maydell , Fabiano Rosas , peterx@redhat.com, Ani Sinha , Paolo Bonzini Subject: [PULL 01/12] memory: notify hypervisor of all eventfds during listener (de)registration Date: Wed, 9 Oct 2024 08:42:27 -0400 Message-ID: <20241009124238.371084-2-peterx@redhat.com> X-Mailer: git-send-email 2.45.0 In-Reply-To: <20241009124238.371084-1-peterx@redhat.com> References: <20241009124238.371084-1-peterx@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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; Received-SPF: pass client-ip=170.10.129.124; envelope-from=peterx@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.151, 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_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1728477807430116600 Content-Type: text/plain; charset="utf-8" From: Ani Sinha When a new listener for an address space is registered, the hypervisor must= be informed of all existing eventfds for that address space by calling eventfd_add() for that listener. Similarly, when a listener is de-registered from an address space, the hypervisor must be informed of all existing even= tfds for that address space with a call to eventfd_del(). Same is also true for coalesced io. Send coalesced io add/del listener notifications if any flatrage for the address space registered with the listener intersects with any coalesced io range. Suggested-by: Paolo Bonzini Signed-off-by: Ani Sinha Link: https://lore.kernel.org/r/20240918064853.30678-1-anisinha@redhat.com Signed-off-by: Peter Xu --- system/memory.c | 83 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 83 insertions(+) diff --git a/system/memory.c b/system/memory.c index f6f6fee6d8..85f6834cb3 100644 --- a/system/memory.c +++ b/system/memory.c @@ -941,6 +941,38 @@ static void flat_range_coalesced_io_add(FlatRange *fr,= AddressSpace *as) } } =20 +static void +flat_range_coalesced_io_notify_listener_add_del(FlatRange *fr, + MemoryRegionSection *mrs, + MemoryListener *listener, + AddressSpace *as, bool add) +{ + CoalescedMemoryRange *cmr; + MemoryRegion *mr =3D fr->mr; + AddrRange tmp; + + QTAILQ_FOREACH(cmr, &mr->coalesced, link) { + tmp =3D addrrange_shift(cmr->addr, + int128_sub(fr->addr.start, + int128_make64(fr->offset_in_regio= n))); + + if (!addrrange_intersects(tmp, fr->addr)) { + return; + } + tmp =3D addrrange_intersection(tmp, fr->addr); + + if (add && listener->coalesced_io_add) { + listener->coalesced_io_add(listener, mrs, + int128_get64(tmp.start), + int128_get64(tmp.size)); + } else if (!add && listener->coalesced_io_del) { + listener->coalesced_io_del(listener, mrs, + int128_get64(tmp.start), + int128_get64(tmp.size)); + } + } +} + static void address_space_update_topology_pass(AddressSpace *as, const FlatView *old_view, const FlatView *new_view, @@ -3015,8 +3047,10 @@ void memory_global_dirty_log_stop(unsigned int flags) static void listener_add_address_space(MemoryListener *listener, AddressSpace *as) { + unsigned i; FlatView *view; FlatRange *fr; + MemoryRegionIoeventfd *fd; =20 if (listener->begin) { listener->begin(listener); @@ -3041,10 +3075,34 @@ static void listener_add_address_space(MemoryListen= er *listener, if (listener->region_add) { listener->region_add(listener, §ion); } + + /* send coalesced io add notifications */ + flat_range_coalesced_io_notify_listener_add_del(fr, §ion, + listener, as, true= ); + if (fr->dirty_log_mask && listener->log_start) { listener->log_start(listener, §ion, 0, fr->dirty_log_mask); } } + + /* + * register all eventfds for this address space for the newly register= ed + * listener. + */ + for (i =3D 0; i < as->ioeventfd_nb; i++) { + fd =3D &as->ioeventfds[i]; + MemoryRegionSection section =3D (MemoryRegionSection) { + .fv =3D view, + .offset_within_address_space =3D int128_get64(fd->addr.start), + .size =3D fd->addr.size, + }; + + if (listener->eventfd_add) { + listener->eventfd_add(listener, §ion, + fd->match_data, fd->data, fd->e); + } + } + if (listener->commit) { listener->commit(listener); } @@ -3054,8 +3112,10 @@ static void listener_add_address_space(MemoryListene= r *listener, static void listener_del_address_space(MemoryListener *listener, AddressSpace *as) { + unsigned i; FlatView *view; FlatRange *fr; + MemoryRegionIoeventfd *fd; =20 if (listener->begin) { listener->begin(listener); @@ -3067,10 +3127,33 @@ static void listener_del_address_space(MemoryListen= er *listener, if (fr->dirty_log_mask && listener->log_stop) { listener->log_stop(listener, §ion, fr->dirty_log_mask, 0); } + + /* send coalesced io del notifications */ + flat_range_coalesced_io_notify_listener_add_del(fr, §ion, + listener, as, fals= e); if (listener->region_del) { listener->region_del(listener, §ion); } } + + /* + * de-register all eventfds for this address space for the current + * listener. + */ + for (i =3D 0; i < as->ioeventfd_nb; i++) { + fd =3D &as->ioeventfds[i]; + MemoryRegionSection section =3D (MemoryRegionSection) { + .fv =3D view, + .offset_within_address_space =3D int128_get64(fd->addr.start), + .size =3D fd->addr.size, + }; + + if (listener->eventfd_del) { + listener->eventfd_del(listener, §ion, + fd->match_data, fd->data, fd->e); + } + } + if (listener->commit) { listener->commit(listener); } --=20 2.45.0