From patchwork Tue Oct 8 12:50:21 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Marc-Andr=C3=A9_Lureau?= X-Patchwork-Id: 13826437 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 651C3CEF166 for ; Tue, 8 Oct 2024 12:52:54 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sy9gz-0008DL-Tj; Tue, 08 Oct 2024 08:51:59 -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 1sy9gj-0007wA-R4 for qemu-devel@nongnu.org; Tue, 08 Oct 2024 08:51:41 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1sy9gi-0002VO-AS for qemu-devel@nongnu.org; Tue, 08 Oct 2024 08:51:41 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1728391899; 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=p/FFNbld4EevaVzMzzg2VI1RGQ4n7l4RxFHaEc4jkBs=; b=QK5i12iDmd0dQwAeJ9nt83MJrcnwUxnsdI+WtXml5QEdXGTvjDbcfWpP6gg+/xsOug+1tB vVGVITtAc+FqDo9MByRolCsDX+5SdT3hJU9LvImCf0xBAvgAq+mMYmkbHyzb3dGU8weTQU I6cSDqo93jHRnmsJznI9I3a9idiA8gM= Received: from mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-201-aEYlkZnCM1Wv16O-0Ato7A-1; Tue, 08 Oct 2024 08:51:36 -0400 X-MC-Unique: aEYlkZnCM1Wv16O-0Ato7A-1 Received: from mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.40]) (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 mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id A5B05192DE08; Tue, 8 Oct 2024 12:51:35 +0000 (UTC) Received: from localhost (unknown [10.39.208.19]) by mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 4F27919560AA; Tue, 8 Oct 2024 12:51:33 +0000 (UTC) From: marcandre.lureau@redhat.com To: qemu-devel@nongnu.org Cc: Peter Maydell , Akihiko Odaki , =?utf-8?q?Philippe_Mathieu-Daud?= =?utf-8?q?=C3=A9?= , =?utf-8?q?Marc-Andr=C3=A9_Lureau?= , "Michael S. Tsirkin" , belmouss@redhat.com, =?utf-8?q?Danie?= =?utf-8?q?l_P=2E_Berrang=C3=A9?= , Thomas Huth , Paolo Bonzini , Gerd Hoffmann , Laurent Vivier Subject: [PATCH v2 12/19] ui/surface: allocate shared memory on !win32 Date: Tue, 8 Oct 2024 16:50:21 +0400 Message-ID: <20241008125028.1177932-13-marcandre.lureau@redhat.com> In-Reply-To: <20241008125028.1177932-1-marcandre.lureau@redhat.com> References: <20241008125028.1177932-1-marcandre.lureau@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.40 Received-SPF: pass client-ip=170.10.129.124; envelope-from=marcandre.lureau@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+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: Marc-André Lureau Use qemu_memfd_alloc() to allocate the display surface memory, which will fallback on tmpfile/mmap() on systems without memfd, and allow to share the display with other processes. This is similar to how display memory is allocated on win32 since commit 09b4c198 ("console/win32: allocate shareable display surface"). Signed-off-by: Marc-André Lureau --- include/ui/surface.h | 6 ++++++ ui/console.c | 28 ++++++++++++++++++++++++++-- 2 files changed, 32 insertions(+), 2 deletions(-) diff --git a/include/ui/surface.h b/include/ui/surface.h index 345b19169d..37d03be4af 100644 --- a/include/ui/surface.h +++ b/include/ui/surface.h @@ -26,6 +26,9 @@ typedef struct DisplaySurface { #ifdef WIN32 HANDLE handle; uint32_t handle_offset; +#else + int shmfd; + uint32_t shmfd_offset; #endif } DisplaySurface; @@ -40,6 +43,9 @@ DisplaySurface *qemu_create_placeholder_surface(int w, int h, #ifdef WIN32 void qemu_displaysurface_win32_set_handle(DisplaySurface *surface, HANDLE h, uint32_t offset); +#else +void qemu_displaysurface_set_shmfd(DisplaySurface *surface, + int shmfd, uint32_t offset); #endif DisplaySurface *qemu_create_displaysurface(int width, int height); diff --git a/ui/console.c b/ui/console.c index fdd76c2be4..3a2aaba3c7 100644 --- a/ui/console.c +++ b/ui/console.c @@ -37,6 +37,7 @@ #include "trace.h" #include "exec/memory.h" #include "qom/object.h" +#include "qemu/memfd.h" #include "console-priv.h" @@ -461,6 +462,15 @@ void qemu_displaysurface_win32_set_handle(DisplaySurface *surface, surface->handle = h; surface->handle_offset = offset; } +#else +void qemu_displaysurface_set_shmfd(DisplaySurface *surface, + int shmfd, uint32_t offset) +{ + assert(surface->shmfd == -1); + + surface->shmfd = shmfd; + surface->shmfd_offset = offset; +} #endif DisplaySurface *qemu_create_displaysurface(int width, int height) @@ -469,12 +479,16 @@ DisplaySurface *qemu_create_displaysurface(int width, int height) void *bits = NULL; #ifdef WIN32 HANDLE handle = NULL; +#else + int shmfd = -1; #endif trace_displaysurface_create(width, height); #ifdef WIN32 bits = qemu_win32_map_alloc(width * height * 4, &handle, &error_abort); +#else + bits = qemu_memfd_alloc("displaysurface", width * height * 4, 0, &shmfd, &error_abort); #endif surface = qemu_create_displaysurface_from( @@ -486,9 +500,13 @@ DisplaySurface *qemu_create_displaysurface(int width, int height) #ifdef WIN32 qemu_displaysurface_win32_set_handle(surface, handle, 0); - pixman_image_set_destroy_function(surface->image, - qemu_pixman_shared_image_destroy, handle); + void *data = handle; +#else + qemu_displaysurface_set_shmfd(surface, shmfd, 0); + void *data = GINT_TO_POINTER(shmfd); #endif + pixman_image_set_destroy_function(surface->image, qemu_pixman_shared_image_destroy, data); + return surface; } @@ -499,6 +517,9 @@ DisplaySurface *qemu_create_displaysurface_from(int width, int height, DisplaySurface *surface = g_new0(DisplaySurface, 1); trace_displaysurface_create_from(surface, width, height, format); +#ifndef WIN32 + surface->shmfd = -1; +#endif surface->image = pixman_image_create_bits(format, width, height, (void *)data, linesize); @@ -512,6 +533,9 @@ DisplaySurface *qemu_create_displaysurface_pixman(pixman_image_t *image) DisplaySurface *surface = g_new0(DisplaySurface, 1); trace_displaysurface_create_pixman(surface); +#ifndef WIN32 + surface->shmfd = -1; +#endif surface->image = pixman_image_ref(image); return surface;