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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= X-MC-Unique: -xx8MJlXP9O6qxJnD6Usgg-1 From: marcandre.lureau@redhat.com To: qemu-devel@nongnu.org Cc: peter.maydell@linaro.org, =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= 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 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 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+importer=patchew.org@nongnu.org; helo=lists.gnu.org; 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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1728913441578116600 From: Marc-Andr=C3=A9 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-Andr=C3=A9 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; =20 @@ -40,6 +43,9 @@ DisplaySurface *qemu_create_placeholder_surface(int w, in= t 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 =20 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" =20 #include "console-priv.h" =20 @@ -461,6 +462,15 @@ void qemu_displaysurface_win32_set_handle(DisplaySurfa= ce *surface, surface->handle =3D h; surface->handle_offset =3D offset; } +#else +void qemu_displaysurface_set_shmfd(DisplaySurface *surface, + int shmfd, uint32_t offset) +{ + assert(surface->shmfd =3D=3D -1); + + surface->shmfd =3D shmfd; + surface->shmfd_offset =3D offset; +} #endif =20 DisplaySurface *qemu_create_displaysurface(int width, int height) @@ -469,12 +479,16 @@ DisplaySurface *qemu_create_displaysurface(int width,= int height) void *bits =3D NULL; #ifdef WIN32 HANDLE handle =3D NULL; +#else + int shmfd =3D -1; #endif =20 trace_displaysurface_create(width, height); =20 #ifdef WIN32 bits =3D qemu_win32_map_alloc(width * height * 4, &handle, &error_abor= t); +#else + bits =3D qemu_memfd_alloc("displaysurface", width * height * 4, 0, &sh= mfd, &error_abort); #endif =20 surface =3D qemu_create_displaysurface_from( @@ -486,9 +500,13 @@ DisplaySurface *qemu_create_displaysurface(int width, = int height) =20 #ifdef WIN32 qemu_displaysurface_win32_set_handle(surface, handle, 0); - pixman_image_set_destroy_function(surface->image, - qemu_pixman_shared_image_destroy, ha= ndle); + void *data =3D handle; +#else + qemu_displaysurface_set_shmfd(surface, shmfd, 0); + void *data =3D GINT_TO_POINTER(shmfd); #endif + pixman_image_set_destroy_function(surface->image, qemu_pixman_shared_i= mage_destroy, data); + return surface; } =20 @@ -499,6 +517,9 @@ DisplaySurface *qemu_create_displaysurface_from(int wid= th, int height, DisplaySurface *surface =3D g_new0(DisplaySurface, 1); =20 trace_displaysurface_create_from(surface, width, height, format); +#ifndef WIN32 + surface->shmfd =3D -1; +#endif surface->image =3D pixman_image_create_bits(format, width, height, (void *)data, linesize); @@ -512,6 +533,9 @@ DisplaySurface *qemu_create_displaysurface_pixman(pixma= n_image_t *image) DisplaySurface *surface =3D g_new0(DisplaySurface, 1); =20 trace_displaysurface_create_pixman(surface); +#ifndef WIN32 + surface->shmfd =3D -1; +#endif surface->image =3D pixman_image_ref(image); =20 return surface; --=20 2.47.0