From nobody Sat Nov 8 10:42:28 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.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; dkim=fail; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (209.51.188.17 [209.51.188.17]) by mx.zohomail.com with SMTPS id 1550119358584451.03747050053414; Wed, 13 Feb 2019 20:42:38 -0800 (PST) Received: from localhost ([127.0.0.1]:39956 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gu8r2-0003VB-Gu for importer@patchew.org; Wed, 13 Feb 2019 23:42:32 -0500 Received: from eggs.gnu.org ([209.51.188.92]:45970) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gu8p5-0002EF-6O for qemu-devel@nongnu.org; Wed, 13 Feb 2019 23:40:32 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gu8on-0006uh-JH for qemu-devel@nongnu.org; Wed, 13 Feb 2019 23:40:18 -0500 Received: from ozlabs.org ([2401:3900:2:1::2]:44773) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gu8oh-0006Oa-2k; Wed, 13 Feb 2019 23:40:09 -0500 Received: by ozlabs.org (Postfix, from userid 1007) id 440Nvr3rrZz9sN9; Thu, 14 Feb 2019 15:39:20 +1100 (AEDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gibson.dropbear.id.au; s=201602; t=1550119160; bh=xQXB7NXvyxO7J7letXN6DMuzfy/S7ZPsCKWOGoAEg1U=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JAVO1F3As4f2+4ywyi6NgnSm6uALbJ56Amftp05AScyfcbmJDWkDVtE8s0M6YP3RM zQg8bgBdCeBmjyor0BVe94Bv6U3y4ps6Yx1CY/5nTJEMl+JTEOQF5CFSGiIMueRFSR q1PpEA4geWL0LkS8Q4ZDU0EPZK2o+9J2yytIVraI= From: David Gibson To: mst@redhat.com, qemu-devel@nongnu.org Date: Thu, 14 Feb 2019 15:39:14 +1100 Message-Id: <20190214043916.22128-4-david@gibson.dropbear.id.au> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190214043916.22128-1-david@gibson.dropbear.id.au> References: <20190214043916.22128-1-david@gibson.dropbear.id.au> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2401:3900:2:1::2 Subject: [Qemu-devel] [PATCH 3/5] virtio-balloon: Rework ballon_page() interface X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: David Hildenbrand , qemu-ppc@nongnu.org, David Gibson Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" This replaces the balloon_page() internal interface with ballon_inflate_page(), with a slightly different interface. The new interface will make future alterations simpler. Signed-off-by: David Gibson Reviewed-by: David Hildenbrand Reviewed-by: Michael S. Tsirkin --- hw/virtio/virtio-balloon.c | 18 ++++++++---------- 1 file changed, 8 insertions(+), 10 deletions(-) diff --git a/hw/virtio/virtio-balloon.c b/hw/virtio/virtio-balloon.c index eb357824d8..bf93148486 100644 --- a/hw/virtio/virtio-balloon.c +++ b/hw/virtio/virtio-balloon.c @@ -33,11 +33,12 @@ =20 #define BALLOON_PAGE_SIZE (1 << VIRTIO_BALLOON_PFN_SHIFT) =20 -static void balloon_page(void *addr, int deflate) +static void balloon_inflate_page(VirtIOBalloon *balloon, + MemoryRegion *mr, hwaddr offset) { - if (!qemu_balloon_is_inhibited() && !deflate) { - qemu_madvise(addr, BALLOON_PAGE_SIZE, QEMU_MADV_DONTNEED); - } + void *addr =3D memory_region_get_ram_ptr(mr) + offset; + + qemu_madvise(addr, BALLOON_PAGE_SIZE, QEMU_MADV_DONTNEED); } =20 static const char *balloon_stat_names[] =3D { @@ -222,7 +223,6 @@ static void virtio_balloon_handle_output(VirtIODevice *= vdev, VirtQueue *vq) =20 while (iov_to_buf(elem->out_sg, elem->out_num, offset, &pfn, 4) = =3D=3D 4) { hwaddr pa; - hwaddr addr; int p =3D virtio_ldl_p(vdev, &pfn); =20 pa =3D (hwaddr) p << VIRTIO_BALLOON_PFN_SHIFT; @@ -244,11 +244,9 @@ static void virtio_balloon_handle_output(VirtIODevice = *vdev, VirtQueue *vq) =20 trace_virtio_balloon_handle_output(memory_region_name(section.= mr), pa); - /* Using memory_region_get_ram_ptr is bending the rules a bit,= but - should be OK because we only want a single page. */ - addr =3D section.offset_within_region; - balloon_page(memory_region_get_ram_ptr(section.mr) + addr, - !!(vq =3D=3D s->dvq)); + if (!qemu_balloon_is_inhibited() && vq !=3D s->dvq) { + balloon_inflate_page(s, section.mr, section.offset_within_= region); + } memory_region_unref(section.mr); } =20 --=20 2.20.1