From patchwork Mon Oct 14 13:39:27 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: 13835058 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 5580CD16261 for ; Mon, 14 Oct 2024 13:43:59 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1t0LJY-0001VZ-8p; Mon, 14 Oct 2024 09:40:48 -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 1t0LJT-0001Jk-GU for qemu-devel@nongnu.org; Mon, 14 Oct 2024 09:40:44 -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 1t0LJR-00040i-Uc for qemu-devel@nongnu.org; Mon, 14 Oct 2024 09:40:43 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1728913241; 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=7dovugkP7VQlHiHIlAhTAIbVz2WTHmd/aEchJnZzyJw=; b=i1aFulrqU2KhUe2SlDA3YEhTdpXzH2KUfOAQCuNEP9MgkuPFFEvcS0iFbU3AL4p28ihNp4 ypyZdAtV/FcXPDs0FEKRej1455f6N1rtDB1Z45/VOAncUbQo4+mbxKAWS/CoRoyF39ogNh xGlAr9TGKZKn4GPFTiPOjGzmKpgr5RQ= Received: from mx-prod-mc-02.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-446--xx8MJlXP9O6qxJnD6Usgg-1; Mon, 14 Oct 2024 09:40:40 -0400 X-MC-Unique: -xx8MJlXP9O6qxJnD6Usgg-1 Received: from mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.4]) (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 mx-prod-mc-02.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 230F71955D95; Mon, 14 Oct 2024 13:40:39 +0000 (UTC) Received: from localhost (unknown [10.39.208.12]) by mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 527A63000198; Mon, 14 Oct 2024 13:40:37 +0000 (UTC) From: marcandre.lureau@redhat.com To: qemu-devel@nongnu.org Cc: peter.maydell@linaro.org, =?utf-8?q?Marc-Andr=C3=A9_Lureau?= Subject: [PULL 12/20] ui/surface: allocate shared memory on !win32 Date: Mon, 14 Oct 2024 17:39:27 +0400 Message-ID: <20241014133935.470709-13-marcandre.lureau@redhat.com> In-Reply-To: <20241014133935.470709-1-marcandre.lureau@redhat.com> References: <20241014133935.470709-1-marcandre.lureau@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 Received-SPF: pass client-ip=170.10.133.124; envelope-from=marcandre.lureau@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: 12 X-Spam_score: 1.2 X-Spam_bar: + X-Spam_report: (1.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.076, 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_SBL_CSS=3.335, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no 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 Reviewed-by: Akihiko Odaki Message-ID: <20241008125028.1177932-13-marcandre.lureau@redhat.com> --- 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;