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Fri, 18 Oct 2024 07:43:12 -0700 (PDT) X-Google-Smtp-Source: AGHT+IEQRzme0GwT0Pno2T65dD4dsZfkWgwu+d7+hO5ptwthRcIWEkT2p4FCDwDmj5hQMm+CY5FCLQ== X-Received: by 2002:a5d:4581:0:b0:37d:492c:4f54 with SMTP id ffacd0b85a97d-37ea21de09fmr1880673f8f.3.1729262592173; Fri, 18 Oct 2024 07:43:12 -0700 (PDT) From: Paolo Bonzini To: qemu-devel@nongnu.org Cc: Manos Pitsidianakis , Junjie Mao Subject: [PATCH 01/13] meson: import rust module into a global variable Date: Fri, 18 Oct 2024 16:42:53 +0200 Message-ID: <20241018144306.954716-2-pbonzini@redhat.com> X-Mailer: git-send-email 2.46.2 In-Reply-To: <20241018144306.954716-1-pbonzini@redhat.com> References: <20241018144306.954716-1-pbonzini@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=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.016, 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: 1729262689584116600 Content-Type: text/plain; charset="utf-8" Signed-off-by: Paolo Bonzini --- meson.build | 1 + rust/qemu-api-macros/meson.build | 2 +- 2 files changed, 2 insertions(+), 1 deletion(-) diff --git a/meson.build b/meson.build index d26690ce204..ffd78b6cbb3 100644 --- a/meson.build +++ b/meson.build @@ -15,6 +15,7 @@ meson.add_postconf_script(find_program('scripts/symlink-i= nstall-tree.py')) =20 not_found =3D dependency('', required: false) keyval =3D import('keyval') +rust =3D import('rust') ss =3D import('sourceset') fs =3D import('fs') =20 diff --git a/rust/qemu-api-macros/meson.build b/rust/qemu-api-macros/meson.= build index 517b9a4d2d5..24325dea5c2 100644 --- a/rust/qemu-api-macros/meson.build +++ b/rust/qemu-api-macros/meson.build @@ -2,7 +2,7 @@ quote_dep =3D dependency('quote-1-rs', native: true) syn_dep =3D dependency('syn-2-rs', native: true) proc_macro2_dep =3D dependency('proc-macro2-1-rs', native: true) =20 -_qemu_api_macros_rs =3D import('rust').proc_macro( +_qemu_api_macros_rs =3D rust.proc_macro( 'qemu_api_macros', files('src/lib.rs'), override_options: ['rust_std=3D2021', 'build.rust_std=3D2021'], --=20 2.46.2 From nobody Tue Oct 22 23:33:03 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; 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Fri, 18 Oct 2024 07:43:15 -0700 (PDT) X-Google-Smtp-Source: AGHT+IHiNvFYNTzSJFI2vzWwu5T2zeEXAoX5XqUlpsHH7HUk4zF9Tnq3Jlf66qMF5bC/jbxDxDFVtg== X-Received: by 2002:a05:6000:e83:b0:374:cee6:c298 with SMTP id ffacd0b85a97d-37d93e2492bmr4913928f8f.21.1729262595159; Fri, 18 Oct 2024 07:43:15 -0700 (PDT) From: Paolo Bonzini To: qemu-devel@nongnu.org Cc: Manos Pitsidianakis , Junjie Mao Subject: [PATCH 02/13] meson: remove repeated search for rust_root_crate.sh Date: Fri, 18 Oct 2024 16:42:54 +0200 Message-ID: <20241018144306.954716-3-pbonzini@redhat.com> X-Mailer: git-send-email 2.46.2 In-Reply-To: <20241018144306.954716-1-pbonzini@redhat.com> References: <20241018144306.954716-1-pbonzini@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=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.016, 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: 1729262661266116600 Content-Type: text/plain; charset="utf-8" Avoid repeated lines of the form Program scripts/rust/rust_root_crate.sh found: YES (/home/pbonzini/work/ups= tream/qemu/scripts/rust/rust_root_crate.sh) in the meson logs. Reviewed-by: Junjie Mao Signed-off-by: Paolo Bonzini --- meson.build | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/meson.build b/meson.build index ffd78b6cbb3..f85bc22fbdd 100644 --- a/meson.build +++ b/meson.build @@ -3977,6 +3977,7 @@ endif =20 =20 feature_to_c =3D find_program('scripts/feature_to_c.py') +rust_root_crate =3D find_program('scripts/rust/rust_root_crate.sh') =20 if host_os =3D=3D 'darwin' entitlement =3D find_program('scripts/entitlement.sh') @@ -4078,7 +4079,7 @@ foreach target : target_dirs if crates.length() > 0 rlib_rs =3D custom_target('rust_' + target.underscorify() + '.rs', output: 'rust_' + target.underscorify() + '.= rs', - command: [find_program('scripts/rust/rust_ro= ot_crate.sh')] + crates, + command: [rust_root_crate, crates], capture: true, build_by_default: true, build_always_stale: true) --=20 2.46.2 From nobody Tue Oct 22 23:33:03 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; 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Fri, 18 Oct 2024 07:43:18 -0700 (PDT) X-Google-Smtp-Source: AGHT+IGBlwSkyu6zYc2SdwTjWIXH0OuA20A1PK/mET2YotKr6f9GSxkvXqsT905efB/NKciY/uQCoA== X-Received: by 2002:a05:600c:354e:b0:42b:a7c7:5667 with SMTP id 5b1f17b1804b1-431616a3a15mr20835435e9.25.1729262598034; Fri, 18 Oct 2024 07:43:18 -0700 (PDT) From: Paolo Bonzini To: qemu-devel@nongnu.org Cc: Manos Pitsidianakis , Junjie Mao Subject: [PATCH 03/13] meson: pass rustc_args when building all crates Date: Fri, 18 Oct 2024 16:42:55 +0200 Message-ID: <20241018144306.954716-4-pbonzini@redhat.com> X-Mailer: git-send-email 2.46.2 In-Reply-To: <20241018144306.954716-1-pbonzini@redhat.com> References: <20241018144306.954716-1-pbonzini@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=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.016, 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: 1729262647276116600 Content-Type: text/plain; charset="utf-8" rustc_args is needed to smooth the difference in warnings between the vario= us versions of rustc. Always include those arguments. Signed-off-by: Paolo Bonzini --- meson.build | 18 +++++++++++------- rust/qemu-api/meson.build | 2 +- rust/qemu-api/src/device_class.rs | 10 ++++++---- 3 files changed, 18 insertions(+), 12 deletions(-) diff --git a/meson.build b/meson.build index f85bc22fbdd..44f3bf34931 100644 --- a/meson.build +++ b/meson.build @@ -3317,6 +3317,17 @@ endif =20 genh +=3D configure_file(output: 'config-host.h', configuration: config_ho= st_data) =20 +if have_rust and have_system + rustc_args =3D run_command( + find_program('scripts/rust/rustc_args.py'), + '--config-headers', meson.project_build_root() / 'config-host.h', + capture : true, + check: true).stdout().strip().split() + rustc_args +=3D ['-D', 'unsafe_op_in_unsafe_fn'] + add_project_arguments(rustc_args, native: false, language: 'rust') + add_project_arguments(rustc_args, native: true, language: 'rust') +endif + hxtool =3D find_program('scripts/hxtool') shaderinclude =3D find_program('scripts/shaderinclude.py') qapi_gen =3D find_program('scripts/qapi-gen.py') @@ -3909,12 +3920,6 @@ common_all =3D static_library('common', dependencies: common_ss.all_dependencies()) =20 if have_rust and have_system - rustc_args =3D run_command( - find_program('scripts/rust/rustc_args.py'), - '--config-headers', meson.project_build_root() / 'config-host.h', - capture : true, - check: true).stdout().strip().split() - rustc_args +=3D ['-D', 'unsafe_op_in_unsafe_fn'] bindgen_args =3D [ '--disable-header-comment', '--raw-line', '// @generated', @@ -4087,7 +4092,6 @@ foreach target : target_dirs rlib_rs, dependencies: target_rust.dependencies(), override_options: ['rust_std=3D2021', 'build.r= ust_std=3D2021'], - rust_args: rustc_args, rust_abi: 'c') arch_deps +=3D declare_dependency(link_whole: [rlib]) endif diff --git a/rust/qemu-api/meson.build b/rust/qemu-api/meson.build index c72d34b607d..42ea815fa5a 100644 --- a/rust/qemu-api/meson.build +++ b/rust/qemu-api/meson.build @@ -10,7 +10,7 @@ _qemu_api_rs =3D static_library( ), override_options: ['rust_std=3D2021', 'build.rust_std=3D2021'], rust_abi: 'rust', - rust_args: rustc_args + [ + rust_args: [ '--cfg', 'MESON', # '--cfg', 'feature=3D"allocator"', ], diff --git a/rust/qemu-api/src/device_class.rs b/rust/qemu-api/src/device_c= lass.rs index 1ea95beb78d..b6b68cf9ce2 100644 --- a/rust/qemu-api/src/device_class.rs +++ b/rust/qemu-api/src/device_class.rs @@ -16,10 +16,12 @@ macro_rules! device_class_init { ) { let mut dc =3D ::core::ptr::NonNull::new(klass.cast::<$crate::bindings::D= eviceClass>()).unwrap(); - dc.as_mut().realize =3D $realize_fn; - dc.as_mut().vmsd =3D &$vmsd; - $crate::bindings::device_class_set_legacy_reset(dc.as_mut(), $= legacy_reset_fn); - $crate::bindings::device_class_set_props(dc.as_mut(), $props.a= s_mut_ptr()); + unsafe { + dc.as_mut().realize =3D $realize_fn; + dc.as_mut().vmsd =3D &$vmsd; + $crate::bindings::device_class_set_legacy_reset(dc.as_mut(= ), $legacy_reset_fn); + $crate::bindings::device_class_set_props(dc.as_mut(), $pro= ps.as_mut_ptr()); + } } }; } --=20 2.46.2 From nobody Tue Oct 22 23:33:03 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1729262730; cv=none; d=zohomail.com; s=zohoarc; b=eK/nfX0UXPSH8XNslP9JfxpywV+uxxF5+LRQwQTHLcYw9BzuR2QoXAWxlXEEE/bGnm5oviDi2OhqlejlSHEjEEkfK5rsuqNWYEyrBznuVDKHPND6+recMDzZBDqQh+7K6tet5c11EkxvPk0Jf77QU72vpvfUSxDjX5Dx/ym3rs8= ARC-Message-Signature: i=1; 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Fri, 18 Oct 2024 07:43:21 -0700 (PDT) X-Google-Smtp-Source: AGHT+IFlJfRDHgpGcAwHn5SwM3qN01kA1iAScDSzLvZG2bCO5VvRaQSsnb/rAzMOkv976pB31/NZrw== X-Received: by 2002:a05:600c:4fd2:b0:431:15f1:421d with SMTP id 5b1f17b1804b1-43158760531mr48904665e9.16.1729262600903; Fri, 18 Oct 2024 07:43:20 -0700 (PDT) From: Paolo Bonzini To: qemu-devel@nongnu.org Cc: Manos Pitsidianakis , Junjie Mao Subject: [PATCH 04/13] rust: do not use --no-size_t-is-usize Date: Fri, 18 Oct 2024 16:42:56 +0200 Message-ID: <20241018144306.954716-5-pbonzini@redhat.com> X-Mailer: git-send-email 2.46.2 In-Reply-To: <20241018144306.954716-1-pbonzini@redhat.com> References: <20241018144306.954716-1-pbonzini@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=170.10.133.124; envelope-from=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.016, 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: 1729262731693116600 Content-Type: text/plain; charset="utf-8" This not necessary and makes it harder to write code that is portable between 32- and 64-bit systems: it adds extra casts even though size_of, align_of or offset_of already return the right type. Signed-off-by: Paolo Bonzini --- meson.build | 1 - rust/qemu-api/src/definitions.rs | 6 +++--- 2 files changed, 3 insertions(+), 4 deletions(-) diff --git a/meson.build b/meson.build index 44f3bf34931..48f82fd4ba6 100644 --- a/meson.build +++ b/meson.build @@ -3932,7 +3932,6 @@ if have_rust and have_system '--no-doc-comments', '--use-core', '--with-derive-default', - '--no-size_t-is-usize', '--no-layout-tests', '--no-prepend-enum-name', '--allowlist-file', meson.project_source_root() + '/include/.*', diff --git a/rust/qemu-api/src/definitions.rs b/rust/qemu-api/src/definitio= ns.rs index 60bd3f8aaa6..0b681c593f2 100644 --- a/rust/qemu-api/src/definitions.rs +++ b/rust/qemu-api/src/definitions.rs @@ -81,13 +81,13 @@ macro_rules! type_info { } else { ::core::ptr::null_mut() }, - instance_size: ::core::mem::size_of::<$t>() as $crate::binding= s::size_t, - instance_align: ::core::mem::align_of::<$t>() as $crate::bindi= ngs::size_t, + instance_size: ::core::mem::size_of::<$t>(), + instance_align: ::core::mem::align_of::<$t>(), instance_init: <$t as $crate::definitions::ObjectImpl>::INSTAN= CE_INIT, instance_post_init: <$t as $crate::definitions::ObjectImpl>::I= NSTANCE_POST_INIT, instance_finalize: <$t as $crate::definitions::ObjectImpl>::IN= STANCE_FINALIZE, abstract_: <$t as $crate::definitions::ObjectImpl>::ABSTRACT, - class_size: ::core::mem::size_of::<<$t as $crate::definitions= ::ObjectImpl>::Class>() as $crate::bindings::size_t, + class_size: ::core::mem::size_of::<<$t as $crate::definitions= ::ObjectImpl>::Class>(), class_init: <<$t as $crate::definitions::ObjectImpl>::Class as= $crate::definitions::Class>::CLASS_INIT, class_base_init: <<$t as $crate::definitions::ObjectImpl>::Cla= ss as $crate::definitions::Class>::CLASS_BASE_INIT, class_data: ::core::ptr::null_mut(), --=20 2.46.2 From nobody Tue Oct 22 23:33:03 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; 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Fri, 18 Oct 2024 07:43:24 -0700 (PDT) X-Google-Smtp-Source: AGHT+IFgFOSJSlu0kfDBE4750eBymTbwtcY3y4QPANHcUJmBCnVByjmrBD8GQoTgQMmm+G1JonIaqA== X-Received: by 2002:a05:600c:3b9b:b0:42c:b037:5f9d with SMTP id 5b1f17b1804b1-43161636f67mr21257455e9.3.1729262603953; Fri, 18 Oct 2024 07:43:23 -0700 (PDT) From: Paolo Bonzini To: qemu-devel@nongnu.org Cc: Manos Pitsidianakis , Junjie Mao Subject: [PATCH 05/13] rust: remove uses of #[no_mangle] Date: Fri, 18 Oct 2024 16:42:57 +0200 Message-ID: <20241018144306.954716-6-pbonzini@redhat.com> X-Mailer: git-send-email 2.46.2 In-Reply-To: <20241018144306.954716-1-pbonzini@redhat.com> References: <20241018144306.954716-1-pbonzini@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=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.016, 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: 1729262669449116600 Content-Type: text/plain; charset="utf-8" Mangled symbols do not cause any issue; disabling mangling is only useful if C headers reference the Rust function, which is not the case here. Signed-off-by: Paolo Bonzini Reviewed-by: Junjie Mao --- rust/hw/char/pl011/src/device.rs | 5 ----- rust/hw/char/pl011/src/device_class.rs | 2 -- rust/hw/char/pl011/src/memory_ops.rs | 2 -- rust/qemu-api/src/definitions.rs | 1 - rust/qemu-api/src/device_class.rs | 2 -- 5 files changed, 12 deletions(-) diff --git a/rust/hw/char/pl011/src/device.rs b/rust/hw/char/pl011/src/devi= ce.rs index c7193b41bee..2b43f5e0939 100644 --- a/rust/hw/char/pl011/src/device.rs +++ b/rust/hw/char/pl011/src/device.rs @@ -514,7 +514,6 @@ pub fn update(&self) { /// We expect the FFI user of this function to pass a valid pointer, that = has /// the same size as [`PL011State`]. We also expect the device is /// readable/writeable from one thread at any time. -#[no_mangle] pub unsafe extern "C" fn pl011_can_receive(opaque: *mut c_void) -> c_int { unsafe { debug_assert!(!opaque.is_null()); @@ -530,7 +529,6 @@ pub fn update(&self) { /// readable/writeable from one thread at any time. /// /// The buffer and size arguments must also be valid. -#[no_mangle] pub unsafe extern "C" fn pl011_receive( opaque: *mut core::ffi::c_void, buf: *const u8, @@ -554,7 +552,6 @@ pub fn update(&self) { /// We expect the FFI user of this function to pass a valid pointer, that = has /// the same size as [`PL011State`]. We also expect the device is /// readable/writeable from one thread at any time. -#[no_mangle] pub unsafe extern "C" fn pl011_event(opaque: *mut core::ffi::c_void, event= : QEMUChrEvent) { unsafe { debug_assert!(!opaque.is_null()); @@ -566,7 +563,6 @@ pub fn update(&self) { /// # Safety /// /// We expect the FFI user of this function to pass a valid pointer for `c= hr`. -#[no_mangle] pub unsafe extern "C" fn pl011_create( addr: u64, irq: qemu_irq, @@ -589,7 +585,6 @@ pub fn update(&self) { /// We expect the FFI user of this function to pass a valid pointer, that = has /// the same size as [`PL011State`]. We also expect the device is /// readable/writeable from one thread at any time. -#[no_mangle] pub unsafe extern "C" fn pl011_init(obj: *mut Object) { unsafe { debug_assert!(!obj.is_null()); diff --git a/rust/hw/char/pl011/src/device_class.rs b/rust/hw/char/pl011/sr= c/device_class.rs index b7ab31af02d..2ad80451e87 100644 --- a/rust/hw/char/pl011/src/device_class.rs +++ b/rust/hw/char/pl011/src/device_class.rs @@ -46,7 +46,6 @@ /// We expect the FFI user of this function to pass a valid pointer, that = has /// the same size as [`PL011State`]. We also expect the device is /// readable/writeable from one thread at any time. -#[no_mangle] pub unsafe extern "C" fn pl011_realize(dev: *mut DeviceState, _errp: *mut = *mut Error) { unsafe { assert!(!dev.is_null()); @@ -60,7 +59,6 @@ /// We expect the FFI user of this function to pass a valid pointer, that = has /// the same size as [`PL011State`]. We also expect the device is /// readable/writeable from one thread at any time. -#[no_mangle] pub unsafe extern "C" fn pl011_reset(dev: *mut DeviceState) { unsafe { assert!(!dev.is_null()); diff --git a/rust/hw/char/pl011/src/memory_ops.rs b/rust/hw/char/pl011/src/= memory_ops.rs index 8d066ebf6d0..5a5320e66c3 100644 --- a/rust/hw/char/pl011/src/memory_ops.rs +++ b/rust/hw/char/pl011/src/memory_ops.rs @@ -22,7 +22,6 @@ }, }; =20 -#[no_mangle] unsafe extern "C" fn pl011_read( opaque: *mut core::ffi::c_void, addr: hwaddr, @@ -44,7 +43,6 @@ } } =20 -#[no_mangle] unsafe extern "C" fn pl011_write( opaque: *mut core::ffi::c_void, addr: hwaddr, diff --git a/rust/qemu-api/src/definitions.rs b/rust/qemu-api/src/definitio= ns.rs index 0b681c593f2..49ac59af123 100644 --- a/rust/qemu-api/src/definitions.rs +++ b/rust/qemu-api/src/definitions.rs @@ -53,7 +53,6 @@ extern "C" fn __load() { #[cfg_attr(target_os =3D "windows", link_section =3D ".CRT$XCU")] pub static LOAD_MODULE: extern "C" fn() =3D { extern "C" fn __load() { - #[no_mangle] unsafe extern "C" fn $func() { $body } diff --git a/rust/qemu-api/src/device_class.rs b/rust/qemu-api/src/device_c= lass.rs index b6b68cf9ce2..2219b9f73d0 100644 --- a/rust/qemu-api/src/device_class.rs +++ b/rust/qemu-api/src/device_class.rs @@ -9,7 +9,6 @@ #[macro_export] macro_rules! device_class_init { ($func:ident, props =3D> $props:ident, realize_fn =3D> $realize_fn:exp= r, legacy_reset_fn =3D> $legacy_reset_fn:expr, vmsd =3D> $vmsd:ident$(,)*) = =3D> { - #[no_mangle] pub unsafe extern "C" fn $func( klass: *mut $crate::bindings::ObjectClass, _: *mut ::core::ffi::c_void, @@ -103,7 +102,6 @@ const fn _calc_prop_len() -> usize { ] } =20 - #[no_mangle] pub static mut $ident: $crate::device_class::Properties = =3D $crate::device_class::Properties(::std::sync::OnceLock::new(), _make_pr= operties); 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Fri, 18 Oct 2024 07:43:27 -0700 (PDT) X-Google-Smtp-Source: AGHT+IGmsK1ZtNUDZD6+1/uyzepMga6cblRrFvNPDyjj7DVWRl3MAM1pPE31ixHScSep2apNPCRBew== X-Received: by 2002:adf:fd0a:0:b0:37d:398f:44f9 with SMTP id ffacd0b85a97d-37eab70f77amr1699529f8f.32.1729262606868; Fri, 18 Oct 2024 07:43:26 -0700 (PDT) From: Paolo Bonzini To: qemu-devel@nongnu.org Cc: Manos Pitsidianakis , Junjie Mao Subject: [PATCH 06/13] rust: remove unused macro module_init! Date: Fri, 18 Oct 2024 16:42:58 +0200 Message-ID: <20241018144306.954716-7-pbonzini@redhat.com> X-Mailer: git-send-email 2.46.2 In-Reply-To: <20241018144306.954716-1-pbonzini@redhat.com> References: <20241018144306.954716-1-pbonzini@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=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.016, 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: 1729262789947116600 Content-Type: text/plain; charset="utf-8" Registering the object is now done by the #[derive(Object)] macro. Signed-off-by: Paolo Bonzini --- rust/qemu-api/src/definitions.rs | 43 -------------------------------- 1 file changed, 43 deletions(-) diff --git a/rust/qemu-api/src/definitions.rs b/rust/qemu-api/src/definitio= ns.rs index 49ac59af123..73ef9a52c1b 100644 --- a/rust/qemu-api/src/definitions.rs +++ b/rust/qemu-api/src/definitions.rs @@ -27,49 +27,6 @@ pub trait Class { >; } =20 -#[macro_export] -macro_rules! module_init { - ($func:expr, $type:expr) =3D> { - #[used] - #[cfg_attr(target_os =3D "linux", link_section =3D ".ctors")] - #[cfg_attr(target_os =3D "macos", link_section =3D "__DATA,__mod_i= nit_func")] - #[cfg_attr(target_os =3D "windows", link_section =3D ".CRT$XCU")] - pub static LOAD_MODULE: extern "C" fn() =3D { - extern "C" fn __load() { - unsafe { - $crate::bindings::register_module_init(Some($func), $t= ype); - } - } - - __load - }; - }; - (qom: $func:ident =3D> $body:block) =3D> { - // NOTE: To have custom identifiers for the ctor func we need to e= ither supply - // them directly as a macro argument or create them with a proc ma= cro. - #[used] - #[cfg_attr(target_os =3D "linux", link_section =3D ".ctors")] - #[cfg_attr(target_os =3D "macos", link_section =3D "__DATA,__mod_i= nit_func")] - #[cfg_attr(target_os =3D "windows", link_section =3D ".CRT$XCU")] - pub static LOAD_MODULE: extern "C" fn() =3D { - extern "C" fn __load() { - unsafe extern "C" fn $func() { - $body - } - - unsafe { - $crate::bindings::register_module_init( - Some($func), - $crate::bindings::module_init_type::MODULE_INIT_QO= M, - ); - } - } - - __load - }; - }; -} - #[macro_export] macro_rules! type_info { ($t:ty) =3D> { --=20 2.46.2 From nobody Tue Oct 22 23:33:03 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1729262662; cv=none; d=zohomail.com; s=zohoarc; b=oGdB3CjVVRHSvSj6J1SguapT3LixuOWsuv657frD965cnHAjYIW+3Z4zvJyesV9PXR6J56BW9SO6NwcAucucvt/GOa79qzKwhyebTmoF9TpvUPrysNfIG8UoVD4SGC2F0ak7yenbnhUaUVsMm8ZBO8UA6JFlvVP0esOy0AJqg/k= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1729262662; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; 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Fri, 18 Oct 2024 07:43:29 -0700 (PDT) X-Google-Smtp-Source: AGHT+IGagS9xiAKzTdiLATFMcGlrIZguRVzRWLmQLtwxnyytzlSVFTD30748AR31pdmE4FdmUCEm6g== X-Received: by 2002:a5d:6584:0:b0:374:c8a0:5d05 with SMTP id ffacd0b85a97d-37eb48a0e89mr1998077f8f.50.1729262609558; Fri, 18 Oct 2024 07:43:29 -0700 (PDT) From: Paolo Bonzini To: qemu-devel@nongnu.org Cc: Manos Pitsidianakis , Junjie Mao Subject: [PATCH 07/13] rust: modernize #[derive(Object)] for ELF platforms Date: Fri, 18 Oct 2024 16:42:59 +0200 Message-ID: <20241018144306.954716-8-pbonzini@redhat.com> X-Mailer: git-send-email 2.46.2 In-Reply-To: <20241018144306.954716-1-pbonzini@redhat.com> References: <20241018144306.954716-1-pbonzini@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=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.016, 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: 1729262663280116600 Content-Type: text/plain; charset="utf-8" Some newer ABI implementations do not provide .ctors; and while some linkers rewrite .ctors into .init_array, not all of them do. Use the newer .init_array ABI, which works more reliably, and apply it to all non-Apple, non-Windows platforms. This is similar to how the ctor crate operates; without this change, "#[derive(Object)]" does not work on Fedora 41. Signed-off-by: Paolo Bonzini Reviewed-by: Junjie Mao --- rust/qemu-api-macros/src/lib.rs | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/rust/qemu-api-macros/src/lib.rs b/rust/qemu-api-macros/src/lib= .rs index 59aba592d9a..be8874caea1 100644 --- a/rust/qemu-api-macros/src/lib.rs +++ b/rust/qemu-api-macros/src/lib.rs @@ -16,8 +16,8 @@ pub fn derive_object(input: TokenStream) -> TokenStream { let expanded =3D quote! { #[allow(non_upper_case_globals)] #[used] - #[cfg_attr(target_os =3D "linux", link_section =3D ".ctors")] - #[cfg_attr(target_os =3D "macos", link_section =3D "__DATA,__mod_i= nit_func")] + #[cfg_attr(not(any(target_vendor =3D "apple", target_os =3D "windo= ws")), link_section =3D ".init_array")] + #[cfg_attr(target_vendor =3D "apple", link_section =3D "__DATA,__m= od_init_func")] #[cfg_attr(target_os =3D "windows", link_section =3D ".CRT$XCU")] pub static #module_static: extern "C" fn() =3D { extern "C" fn __register() { --=20 2.46.2 From nobody Tue Oct 22 23:33:03 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; 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Fri, 18 Oct 2024 07:43:33 -0700 (PDT) X-Google-Smtp-Source: AGHT+IFhMiAaB0ldr+lLd7iVP/vR/2nGp/Lzj18G8C6vG+kacqvRIvPQvUf7/m33/omq2CEfVBEFgQ== X-Received: by 2002:a05:600c:5489:b0:431:52b7:a499 with SMTP id 5b1f17b1804b1-4316164da71mr21554465e9.20.1729262613052; Fri, 18 Oct 2024 07:43:33 -0700 (PDT) From: Paolo Bonzini To: qemu-devel@nongnu.org Cc: Manos Pitsidianakis , Junjie Mao Subject: [PATCH 08/13] rust: build integration test for the qemu_api crate Date: Fri, 18 Oct 2024 16:43:00 +0200 Message-ID: <20241018144306.954716-9-pbonzini@redhat.com> X-Mailer: git-send-email 2.46.2 In-Reply-To: <20241018144306.954716-1-pbonzini@redhat.com> References: <20241018144306.954716-1-pbonzini@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=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.016, 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: 1729262755773116600 Content-Type: text/plain; charset="utf-8" Adjust the integration test to compile with a subset of QEMU object files, and make it actually create an object of the class it defines. Follow the Rust filesystem conventions, where tests go in tests/ if they use the library in the same way any other code would. Signed-off-by: Paolo Bonzini Reviewed-by: Junjie Mao --- meson.build | 10 ++++- rust/qemu-api/meson.build | 20 +++++++-- rust/qemu-api/src/tests.rs | 49 ---------------------- rust/qemu-api/tests/tests.rs | 78 ++++++++++++++++++++++++++++++++++++ 4 files changed, 104 insertions(+), 53 deletions(-) delete mode 100644 rust/qemu-api/src/tests.rs create mode 100644 rust/qemu-api/tests/tests.rs diff --git a/meson.build b/meson.build index 48f82fd4ba6..e50a7edf6ea 100644 --- a/meson.build +++ b/meson.build @@ -3324,7 +3324,15 @@ if have_rust and have_system capture : true, check: true).stdout().strip().split() rustc_args +=3D ['-D', 'unsafe_op_in_unsafe_fn'] - add_project_arguments(rustc_args, native: false, language: 'rust') + + # Apart from procedural macros, our Rust executables will often link + # with C code, so include all the libraries that C code needs. This + # is safe; https://github.com/rust-lang/rust/pull/54675 says that + # passing -nodefaultlibs to the linker "was more ideological to + # start with than anything". + add_project_arguments(rustc_args + ['-C', 'default-linker-libraries'], + native: false, language: 'rust') + add_project_arguments(rustc_args, native: true, language: 'rust') endif =20 diff --git a/rust/qemu-api/meson.build b/rust/qemu-api/meson.build index 42ea815fa5a..d24e0c0725e 100644 --- a/rust/qemu-api/meson.build +++ b/rust/qemu-api/meson.build @@ -14,11 +14,25 @@ _qemu_api_rs =3D static_library( '--cfg', 'MESON', # '--cfg', 'feature=3D"allocator"', ], - dependencies: [ - qemu_api_macros, - ], ) =20 qemu_api =3D declare_dependency( link_with: _qemu_api_rs, + dependencies: qemu_api_macros, ) + +# Rust executable do not support objects, so add an intermediate step. +rust_qemu_api_objs =3D static_library( + 'rust_qemu_api_objs', + objects: [libqom.extract_all_objects(recursive: false), + libhwcore.extract_all_objects(recursive: false)]) + +rust.test('rust-qemu-api-integration', + static_library( + 'rust_qemu_api_integration', + 'tests/tests.rs', + override_options: ['rust_std=3D2021', 'build.rust_std=3D2021'], + link_whole: [rust_qemu_api_objs, libqemuutil]), + + dependencies: [qemu_api, qemu_api_macros], + suite: ['unit', 'rust']) diff --git a/rust/qemu-api/src/tests.rs b/rust/qemu-api/src/tests.rs deleted file mode 100644 index df54edbd4e2..00000000000 --- a/rust/qemu-api/src/tests.rs +++ /dev/null @@ -1,49 +0,0 @@ -// Copyright 2024, Linaro Limited -// Author(s): Manos Pitsidianakis -// SPDX-License-Identifier: GPL-2.0-or-later - -use crate::{ - bindings::*, declare_properties, define_property, device_class_init, v= m_state_description, -}; - -#[test] -fn test_device_decl_macros() { - // Test that macros can compile. - vm_state_description! { - VMSTATE, - name: c"name", - unmigratable: true, - } - - #[repr(C)] - pub struct DummyState { - pub char_backend: CharBackend, - pub migrate_clock: bool, - } - - declare_properties! { - DUMMY_PROPERTIES, - define_property!( - c"chardev", - DummyState, - char_backend, - unsafe { &qdev_prop_chr }, - CharBackend - ), - define_property!( - c"migrate-clk", - DummyState, - migrate_clock, - unsafe { &qdev_prop_bool }, - bool - ), - } - - device_class_init! { - dummy_class_init, - props =3D> DUMMY_PROPERTIES, - realize_fn =3D> None, - reset_fn =3D> None, - vmsd =3D> VMSTATE, - } -} diff --git a/rust/qemu-api/tests/tests.rs b/rust/qemu-api/tests/tests.rs new file mode 100644 index 00000000000..57bab62772d --- /dev/null +++ b/rust/qemu-api/tests/tests.rs @@ -0,0 +1,78 @@ +// Copyright 2024, Linaro Limited +// Author(s): Manos Pitsidianakis +// SPDX-License-Identifier: GPL-2.0-or-later + +use core::ffi::CStr; + +use qemu_api::{ + bindings::*, declare_properties, define_property, + definitions::Class, + definitions::ObjectImpl, + device_class_init, vm_state_description, +}; + +#[test] +fn test_device_decl_macros() { + // Test that macros can compile. + vm_state_description! { + VMSTATE, + name: c"name", + unmigratable: true, + } + + #[repr(C)] + #[derive(qemu_api_macros::Object)] + pub struct DummyState { + pub _parent: DeviceState, + pub migrate_clock: bool, + } + + #[repr(C)] + pub struct DummyClass { + pub _parent: DeviceClass, + } + + declare_properties! { + DUMMY_PROPERTIES, + define_property!( + c"migrate-clk", + DummyState, + migrate_clock, + unsafe { &qdev_prop_bool }, + bool + ), + } + + device_class_init! { + dummy_class_init, + props =3D> DUMMY_PROPERTIES, + realize_fn =3D> None, + legacy_reset_fn =3D> None, + vmsd =3D> VMSTATE, + } + + impl ObjectImpl for DummyState { + type Class =3D DummyClass; + const TYPE_INFO: qemu_api::bindings::TypeInfo =3D qemu_api::type_i= nfo! { Self }; + const TYPE_NAME: &'static CStr =3D c"dummy"; + const PARENT_TYPE_NAME: Option<&'static CStr> =3D Some(TYPE_DEVICE= ); + const ABSTRACT: bool =3D false; + const INSTANCE_INIT: Option =3D None; + const INSTANCE_POST_INIT: Option =3D None; + const INSTANCE_FINALIZE: Option =3D None; + } + + impl Class for DummyClass { + const CLASS_INIT: Option< + unsafe extern "C" fn(klass: *mut ObjectClass, data: *mut core:= :ffi::c_void), + > =3D Some(dummy_class_init); + const CLASS_BASE_INIT: Option< + unsafe extern "C" fn(klass: *mut ObjectClass, data: *mut core:= :ffi::c_void), + > =3D None; + } + + unsafe { + module_call_init(module_init_type::MODULE_INIT_QOM); + object_unref(object_new(DummyState::TYPE_NAME.as_ptr()) as *mut _); + } +} --=20 2.46.2 From nobody Tue Oct 22 23:33:03 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; 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Fri, 18 Oct 2024 07:43:36 -0700 (PDT) X-Google-Smtp-Source: AGHT+IG/2cIUiEBADCILiY5g85Eusx16/mEEHLBs7CDCit4oBcI9vX6pe+Zt6icYGYffc8B+zKocKg== X-Received: by 2002:a05:600c:1c03:b0:431:3bf9:3ebb with SMTP id 5b1f17b1804b1-431616898a5mr21939075e9.24.1729262616252; Fri, 18 Oct 2024 07:43:36 -0700 (PDT) From: Paolo Bonzini To: qemu-devel@nongnu.org Cc: Manos Pitsidianakis , Junjie Mao Subject: [PATCH 09/13] rust: clean up define_property macro Date: Fri, 18 Oct 2024 16:43:01 +0200 Message-ID: <20241018144306.954716-10-pbonzini@redhat.com> X-Mailer: git-send-email 2.46.2 In-Reply-To: <20241018144306.954716-1-pbonzini@redhat.com> References: <20241018144306.954716-1-pbonzini@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=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.016, 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: 1729262733692116600 Content-Type: text/plain; charset="utf-8" Use the "struct update" syntax to initialize most of the fields to zero, and simplify the handmade type-checking of $name. Signed-off-by: Paolo Bonzini Reviewed-by: Junjie Mao --- rust/qemu-api/src/device_class.rs | 29 ++++++----------------------- 1 file changed, 6 insertions(+), 23 deletions(-) diff --git a/rust/qemu-api/src/device_class.rs b/rust/qemu-api/src/device_c= lass.rs index 2219b9f73d0..5aba426d243 100644 --- a/rust/qemu-api/src/device_class.rs +++ b/rust/qemu-api/src/device_class.rs @@ -29,44 +29,27 @@ macro_rules! device_class_init { macro_rules! define_property { ($name:expr, $state:ty, $field:expr, $prop:expr, $type:expr, default = =3D $defval:expr$(,)*) =3D> { $crate::bindings::Property { - name: { - #[used] - static _TEMP: &::core::ffi::CStr =3D $name; - _TEMP.as_ptr() - }, + // use associated function syntax for type checking + name: ::core::ffi::CStr::as_ptr($name), info: $prop, offset: ::core::mem::offset_of!($state, $field) .try_into() .expect("Could not fit offset value to type"), - bitnr: 0, - bitmask: 0, set_default: true, defval: $crate::bindings::Property__bindgen_ty_1 { u: $defval.= into() }, - arrayoffset: 0, - arrayinfo: ::core::ptr::null(), - arrayfieldsize: 0, - link_type: ::core::ptr::null(), + ..unsafe { ::core::mem::MaybeUninit::<$crate::bindings::Proper= ty>::zeroed().assume_init() } } }; ($name:expr, $state:ty, $field:expr, $prop:expr, $type:expr$(,)*) =3D>= { $crate::bindings::Property { - name: { - #[used] - static _TEMP: &::core::ffi::CStr =3D $name; - _TEMP.as_ptr() - }, + // use associated function syntax for type checking + name: ::core::ffi::CStr::as_ptr($name), info: $prop, offset: ::core::mem::offset_of!($state, $field) .try_into() .expect("Could not fit offset value to type"), - bitnr: 0, - bitmask: 0, set_default: false, - defval: $crate::bindings::Property__bindgen_ty_1 { i: 0 }, - arrayoffset: 0, - arrayinfo: ::core::ptr::null(), - arrayfieldsize: 0, - link_type: ::core::ptr::null(), + ..unsafe { ::core::mem::MaybeUninit::<$crate::bindings::Proper= ty>::zeroed().assume_init() } } }; } --=20 2.46.2 From nobody Tue Oct 22 23:33:03 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; 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Fri, 18 Oct 2024 07:43:40 -0700 (PDT) X-Google-Smtp-Source: AGHT+IHKy+uR3ApXqAZBoEmjUeistu/R6u060V5naxL17li2eQl4agU2Fbf8Ya7MPvzQodZVoVCXwg== X-Received: by 2002:a05:600c:4fcd:b0:431:4e33:98b6 with SMTP id 5b1f17b1804b1-43161624d76mr17987435e9.5.1729262619392; Fri, 18 Oct 2024 07:43:39 -0700 (PDT) From: Paolo Bonzini To: qemu-devel@nongnu.org Cc: Manos Pitsidianakis , Junjie Mao Subject: [PATCH 10/13] qdev: make properties array "const" Date: Fri, 18 Oct 2024 16:43:02 +0200 Message-ID: <20241018144306.954716-11-pbonzini@redhat.com> X-Mailer: git-send-email 2.46.2 In-Reply-To: <20241018144306.954716-1-pbonzini@redhat.com> References: <20241018144306.954716-1-pbonzini@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=170.10.133.124; envelope-from=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.016, 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: 1729262691504116600 Content-Type: text/plain; charset="utf-8" Constify all accesses to qdev properties, except for the ObjectPropertyAccessor itself. This makes it possible to place them in read-only memory, and also lets Rust bindings switch from "static mut" arrays to "static"; which is advantageous, because mutable statics are highly discouraged. Signed-off-by: Paolo Bonzini --- include/hw/qdev-core.h | 4 ++-- include/hw/qdev-properties.h | 4 ++-- hw/core/qdev-properties.c | 26 +++++++++++++------------- system/qdev-monitor.c | 2 +- 4 files changed, 18 insertions(+), 18 deletions(-) diff --git a/include/hw/qdev-core.h b/include/hw/qdev-core.h index aa97c34a4be..f9fa291cc63 100644 --- a/include/hw/qdev-core.h +++ b/include/hw/qdev-core.h @@ -132,7 +132,7 @@ struct DeviceClass { * ensures a compile-time error if someone attempts to assign * dc->props directly. */ - Property *props_; + const Property *props_; =20 /** * @user_creatable: Can user instantiate with -device / device_add? @@ -935,7 +935,7 @@ char *qdev_get_own_fw_dev_path_from_handler(BusState *b= us, DeviceState *dev); * you attempt to add an existing property defined by a parent class. * To modify an inherited property you need to use???? */ -void device_class_set_props(DeviceClass *dc, Property *props); +void device_class_set_props(DeviceClass *dc, const Property *props); =20 /** * device_class_set_parent_realize() - set up for chaining realize fns diff --git a/include/hw/qdev-properties.h b/include/hw/qdev-properties.h index 09aa04ca1e2..26ebd230685 100644 --- a/include/hw/qdev-properties.h +++ b/include/hw/qdev-properties.h @@ -37,7 +37,7 @@ struct PropertyInfo { int (*print)(Object *obj, Property *prop, char *dest, size_t len); void (*set_default_value)(ObjectProperty *op, const Property *prop); ObjectProperty *(*create)(ObjectClass *oc, const char *name, - Property *prop); + const Property *prop); ObjectPropertyAccessor *get; ObjectPropertyAccessor *set; ObjectPropertyRelease *release; @@ -223,7 +223,7 @@ void error_set_from_qdev_prop_error(Error **errp, int r= et, Object *obj, * On error, store error in @errp. Static properties access data in a str= uct. * The type of the QOM property is derived from prop->info. */ -void qdev_property_add_static(DeviceState *dev, Property *prop); +void qdev_property_add_static(DeviceState *dev, const Property *prop); =20 /** * qdev_alias_all_properties: Create aliases on source for all target prop= erties diff --git a/hw/core/qdev-properties.c b/hw/core/qdev-properties.c index 86a583574dd..315196bd85a 100644 --- a/hw/core/qdev-properties.c +++ b/hw/core/qdev-properties.c @@ -749,7 +749,7 @@ const PropertyInfo qdev_prop_array =3D { =20 /* --- public helpers --- */ =20 -static Property *qdev_prop_walk(Property *props, const char *name) +static const Property *qdev_prop_walk(const Property *props, const char *n= ame) { if (!props) { return NULL; @@ -763,10 +763,10 @@ static Property *qdev_prop_walk(Property *props, cons= t char *name) return NULL; } =20 -static Property *qdev_prop_find(DeviceState *dev, const char *name) +static const Property *qdev_prop_find(DeviceState *dev, const char *name) { ObjectClass *class; - Property *prop; + const Property *prop; =20 /* device properties */ class =3D object_get_class(OBJECT(dev)); @@ -840,7 +840,7 @@ void qdev_prop_set_string(DeviceState *dev, const char = *name, const char *value) =20 void qdev_prop_set_enum(DeviceState *dev, const char *name, int value) { - Property *prop; + const Property *prop; =20 prop =3D qdev_prop_find(dev, name); object_property_set_str(OBJECT(dev), name, @@ -956,7 +956,7 @@ const PropertyInfo qdev_prop_size =3D { /* --- object link property --- */ =20 static ObjectProperty *create_link_property(ObjectClass *oc, const char *n= ame, - Property *prop) + const Property *prop) { return object_class_property_add_link(oc, name, prop->link_type, prop->offset, @@ -969,7 +969,7 @@ const PropertyInfo qdev_prop_link =3D { .create =3D create_link_property, }; =20 -void qdev_property_add_static(DeviceState *dev, Property *prop) +void qdev_property_add_static(DeviceState *dev, const Property *prop) { Object *obj =3D OBJECT(dev); ObjectProperty *op; @@ -980,7 +980,7 @@ void qdev_property_add_static(DeviceState *dev, Propert= y *prop) field_prop_getter(prop->info), field_prop_setter(prop->info), prop->info->release, - prop); + (Property *)prop); =20 object_property_set_description(obj, prop->name, prop->info->description); @@ -994,7 +994,7 @@ void qdev_property_add_static(DeviceState *dev, Propert= y *prop) } =20 static void qdev_class_add_property(DeviceClass *klass, const char *name, - Property *prop) + const Property *prop) { ObjectClass *oc =3D OBJECT_CLASS(klass); ObjectProperty *op; @@ -1007,7 +1007,7 @@ static void qdev_class_add_property(DeviceClass *klas= s, const char *name, field_prop_getter(prop->info), field_prop_setter(prop->info), prop->info->release, - prop); + (Property *)prop); } if (prop->set_default) { prop->info->set_default_value(op, prop); @@ -1046,7 +1046,7 @@ static void qdev_get_legacy_property(Object *obj, Vis= itor *v, * Do not use this in new code! QOM Properties added through this interfa= ce * will be given names in the "legacy" namespace. */ -static void qdev_class_add_legacy_property(DeviceClass *dc, Property *prop) +static void qdev_class_add_legacy_property(DeviceClass *dc, const Property= *prop) { g_autofree char *name =3D NULL; =20 @@ -1058,12 +1058,12 @@ static void qdev_class_add_legacy_property(DeviceCl= ass *dc, Property *prop) name =3D g_strdup_printf("legacy-%s", prop->name); object_class_property_add(OBJECT_CLASS(dc), name, "str", prop->info->print ? qdev_get_legacy_property : prop->info->get, - NULL, NULL, prop); + NULL, NULL, (Property *)prop); } =20 -void device_class_set_props(DeviceClass *dc, Property *props) +void device_class_set_props(DeviceClass *dc, const Property *props) { - Property *prop; + const Property *prop; =20 dc->props_ =3D props; for (prop =3D props; prop && prop->name; prop++) { diff --git a/system/qdev-monitor.c b/system/qdev-monitor.c index 44994ea0e16..c346ea6ae4b 100644 --- a/system/qdev-monitor.c +++ b/system/qdev-monitor.c @@ -751,7 +751,7 @@ DeviceState *qdev_device_add(QemuOpts *opts, Error **er= rp) =20 #define qdev_printf(fmt, ...) monitor_printf(mon, "%*s" fmt, indent, "", #= # __VA_ARGS__) =20 -static void qdev_print_props(Monitor *mon, DeviceState *dev, Property *pro= ps, +static void qdev_print_props(Monitor *mon, DeviceState *dev, const Propert= y *props, int indent) { if (!props) --=20 2.46.2 From nobody Tue Oct 22 23:33:03 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; 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Fri, 18 Oct 2024 07:43:43 -0700 (PDT) X-Google-Smtp-Source: AGHT+IFaSGjlQKknbJVwEuYZZVU30k72n+n1WrGSyD7f5FtRHRlGzfUZq+z8LuJhOKtRYpMnY/7QIA== X-Received: by 2002:a05:600c:5124:b0:431:5bf2:2d4 with SMTP id 5b1f17b1804b1-431616a388cmr21866275e9.29.1729262623079; Fri, 18 Oct 2024 07:43:43 -0700 (PDT) From: Paolo Bonzini To: qemu-devel@nongnu.org Cc: Manos Pitsidianakis , Junjie Mao Subject: [PATCH 11/13] rust: make properties array immutable Date: Fri, 18 Oct 2024 16:43:03 +0200 Message-ID: <20241018144306.954716-12-pbonzini@redhat.com> X-Mailer: git-send-email 2.46.2 In-Reply-To: <20241018144306.954716-1-pbonzini@redhat.com> References: <20241018144306.954716-1-pbonzini@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=170.10.133.124; envelope-from=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.016, 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: 1729262681486116600 Content-Type: text/plain; charset="utf-8" Now that device_class_set_props() takes a const pointer, the only part of "define_property!" that needs to be non-const is the call to try_into(). This in turn will only break if offset_of returns a value with the most significant bit set (i.e. a struct size that is >=3D2^31 or >=3D 2^63, respectively on 32- and 64-bit system), which is impossible. Just use a cast and clean everything up to remove the run-time initialization. This also removes a use of OnceLock, which was only stabilized in 1.70.0. Signed-off-by: Paolo Bonzini Reviewed-by: Junjie Mao --- rust/qemu-api/src/device_class.rs | 42 ++++++------------------------- 1 file changed, 8 insertions(+), 34 deletions(-) diff --git a/rust/qemu-api/src/device_class.rs b/rust/qemu-api/src/device_c= lass.rs index 5aba426d243..d885f2fcf19 100644 --- a/rust/qemu-api/src/device_class.rs +++ b/rust/qemu-api/src/device_class.rs @@ -2,10 +2,6 @@ // Author(s): Manos Pitsidianakis // SPDX-License-Identifier: GPL-2.0-or-later =20 -use std::sync::OnceLock; - -use crate::bindings::Property; - #[macro_export] macro_rules! device_class_init { ($func:ident, props =3D> $props:ident, realize_fn =3D> $realize_fn:exp= r, legacy_reset_fn =3D> $legacy_reset_fn:expr, vmsd =3D> $vmsd:ident$(,)*) = =3D> { @@ -19,7 +15,7 @@ macro_rules! device_class_init { dc.as_mut().realize =3D $realize_fn; dc.as_mut().vmsd =3D &$vmsd; $crate::bindings::device_class_set_legacy_reset(dc.as_mut(= ), $legacy_reset_fn); - $crate::bindings::device_class_set_props(dc.as_mut(), $pro= ps.as_mut_ptr()); + $crate::bindings::device_class_set_props(dc.as_mut(), $pro= ps.as_ptr()); } } }; @@ -32,9 +28,7 @@ macro_rules! define_property { // use associated function syntax for type checking name: ::core::ffi::CStr::as_ptr($name), info: $prop, - offset: ::core::mem::offset_of!($state, $field) - .try_into() - .expect("Could not fit offset value to type"), + offset: ::core::mem::offset_of!($state, $field) as isize, set_default: true, defval: $crate::bindings::Property__bindgen_ty_1 { u: $defval.= into() }, ..unsafe { ::core::mem::MaybeUninit::<$crate::bindings::Proper= ty>::zeroed().assume_init() } @@ -45,47 +39,27 @@ macro_rules! define_property { // use associated function syntax for type checking name: ::core::ffi::CStr::as_ptr($name), info: $prop, - offset: ::core::mem::offset_of!($state, $field) - .try_into() - .expect("Could not fit offset value to type"), + offset: ::core::mem::offset_of!($state, $field) as isize, set_default: false, ..unsafe { ::core::mem::MaybeUninit::<$crate::bindings::Proper= ty>::zeroed().assume_init() } } }; } =20 -#[repr(C)] -pub struct Properties(pub OnceLock<[Property; N]>, pub fn(= ) -> [Property; N]); - -impl Properties { - pub fn as_mut_ptr(&mut self) -> *mut Property { - _ =3D self.0.get_or_init(self.1); - self.0.get_mut().unwrap().as_mut_ptr() - } -} - #[macro_export] macro_rules! declare_properties { ($ident:ident, $($prop:expr),*$(,)*) =3D> { - - const fn _calc_prop_len() -> usize { + pub static $ident: [$crate::bindings::Property; { let mut len =3D 1; $({ _ =3D stringify!($prop); len +=3D 1; })* len - } - const PROP_LEN: usize =3D _calc_prop_len(); - - fn _make_properties() -> [$crate::bindings::Property; PROP_LEN] { - [ - $($prop),*, - unsafe { ::core::mem::MaybeUninit::<$crate::bindings::= Property>::zeroed().assume_init() }, - ] - } - - pub static mut $ident: $crate::device_class::Properties = =3D $crate::device_class::Properties(::std::sync::OnceLock::new(), _make_pr= operties); + }] =3D [ + $($prop),*, + unsafe { ::core::mem::MaybeUninit::<$crate::bindings::Property= >::zeroed().assume_init() }, + ]; }; } =20 --=20 2.46.2 From nobody Tue Oct 22 23:33:03 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1729262670; cv=none; d=zohomail.com; s=zohoarc; b=iPPwP2W4ywfSm8UOOMyTFLWMmaKL/XHLyzh/d9xX1Qfu/mskyUz/jWwLj7/91VPBNBq4PNHdkSMTpm1FZtrJuy0xtnMr9NR/u/AyKmIAslHN3x0K+aF6D04iLZ9SammDGD7Cx0TEIzFdxpwzH7j+z8dDdxDlkZvPbAJOV/ljbTI= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1729262670; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=emK1BbhOeZN8ln9uEXMUETGvQfGIAyHdSO+Caj5JSUY=; b=Nb4O8AoHeDx7BCdep1npLkx8Ip0+enFuTZg72cgZ/L8HRSMvbWo+36D77Z4RBaB+9ReFnsP5XkiBjOWPJGjOs/M71qehwU5ay8vR9SDWizSsNEnWGmFXGxRX8MNCkXFt5gPz7ji5x7mu/+70fixtCrzDR4mPzM2qw5BHtmyVX6Y= ARC-Authentication-Results: i=1; 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Fri, 18 Oct 2024 07:43:47 -0700 (PDT) X-Google-Smtp-Source: AGHT+IHHch1i06pVAPnRkPkyas0oKandPSHmPSRHHeGgmz15lUrNXqa+PTJNkp74byPNyhiiSAqbEg== X-Received: by 2002:adf:e38f:0:b0:37c:ce58:5a1a with SMTP id ffacd0b85a97d-37eb48942f4mr1981588f8f.54.1729262626708; Fri, 18 Oct 2024 07:43:46 -0700 (PDT) From: Paolo Bonzini To: qemu-devel@nongnu.org Cc: Manos Pitsidianakis , Junjie Mao Subject: [PATCH 12/13] rust: provide safe wrapper for MaybeUninit::zeroed() Date: Fri, 18 Oct 2024 16:43:04 +0200 Message-ID: <20241018144306.954716-13-pbonzini@redhat.com> X-Mailer: git-send-email 2.46.2 In-Reply-To: <20241018144306.954716-1-pbonzini@redhat.com> References: <20241018144306.954716-1-pbonzini@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=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.016, 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: 1729262671424116600 Content-Type: text/plain; charset="utf-8" MaybeUninit::zeroed() is handy, but it introduces unsafe (and has a pretty heavy syntax in general). Introduce a trait that provides the same functionality while staying within safe Rust. In addition, MaybeUninit::zeroed() is not available as a "const" function until Rust 1.75.0, so this also prepares for having handwritten implementations of the trait until we can assume that version. Signed-off-by: Paolo Bonzini Reviewed-by: Junjie Mao --- rust/hw/char/pl011/src/device_class.rs | 8 ++++++-- rust/hw/char/pl011/src/memory_ops.rs | 11 +++++++---- rust/qemu-api/meson.build | 1 + rust/qemu-api/src/device_class.rs | 8 ++++---- rust/qemu-api/src/lib.rs | 1 + rust/qemu-api/src/zeroable.rs | 23 +++++++++++++++++++++++ 6 files changed, 42 insertions(+), 10 deletions(-) create mode 100644 rust/qemu-api/src/zeroable.rs diff --git a/rust/hw/char/pl011/src/device_class.rs b/rust/hw/char/pl011/sr= c/device_class.rs index 2ad80451e87..78fa1cdd5b6 100644 --- a/rust/hw/char/pl011/src/device_class.rs +++ b/rust/hw/char/pl011/src/device_class.rs @@ -4,7 +4,11 @@ =20 use core::ptr::NonNull; =20 -use qemu_api::{bindings::*, definitions::ObjectImpl}; +use qemu_api::{ + bindings::*, + definitions::ObjectImpl, + zeroable::Zeroable, +}; =20 use crate::device::PL011State; =20 @@ -12,7 +16,7 @@ pub static VMSTATE_PL011: VMStateDescription =3D VMStateDescription { name: PL011State::TYPE_INFO.name, unmigratable: true, - ..unsafe { ::core::mem::MaybeUninit::::zeroed().as= sume_init() } + ..Zeroable::ZERO }; =20 qemu_api::declare_properties! { diff --git a/rust/hw/char/pl011/src/memory_ops.rs b/rust/hw/char/pl011/src/= memory_ops.rs index 5a5320e66c3..24ac9c870c1 100644 --- a/rust/hw/char/pl011/src/memory_ops.rs +++ b/rust/hw/char/pl011/src/memory_ops.rs @@ -2,9 +2,12 @@ // Author(s): Manos Pitsidianakis // SPDX-License-Identifier: GPL-2.0-or-later =20 -use core::{mem::MaybeUninit, ptr::NonNull}; +use core::ptr::NonNull; =20 -use qemu_api::bindings::*; +use qemu_api::{ + bindings::*, + zeroable::Zeroable +}; =20 use crate::device::PL011State; =20 @@ -14,11 +17,11 @@ read_with_attrs: None, write_with_attrs: None, endianness: device_endian::DEVICE_NATIVE_ENDIAN, - valid: unsafe { MaybeUninit::::zeroed()= .assume_init() }, + valid: Zeroable::ZERO, impl_: MemoryRegionOps__bindgen_ty_2 { min_access_size: 4, max_access_size: 4, - ..unsafe { MaybeUninit::::zeroed().= assume_init() } + ..Zeroable::ZERO }, }; =20 diff --git a/rust/qemu-api/meson.build b/rust/qemu-api/meson.build index d24e0c0725e..5fa4a08e76b 100644 --- a/rust/qemu-api/meson.build +++ b/rust/qemu-api/meson.build @@ -5,6 +5,7 @@ _qemu_api_rs =3D static_library( 'src/lib.rs', 'src/definitions.rs', 'src/device_class.rs', + 'src/zeroable.rs', ], {'.' : bindings_rs}, ), diff --git a/rust/qemu-api/src/device_class.rs b/rust/qemu-api/src/device_c= lass.rs index d885f2fcf19..ed2d7ce1a54 100644 --- a/rust/qemu-api/src/device_class.rs +++ b/rust/qemu-api/src/device_class.rs @@ -31,7 +31,7 @@ macro_rules! define_property { offset: ::core::mem::offset_of!($state, $field) as isize, set_default: true, defval: $crate::bindings::Property__bindgen_ty_1 { u: $defval.= into() }, - ..unsafe { ::core::mem::MaybeUninit::<$crate::bindings::Proper= ty>::zeroed().assume_init() } + ..$crate::zeroable::Zeroable::ZERO } }; ($name:expr, $state:ty, $field:expr, $prop:expr, $type:expr$(,)*) =3D>= { @@ -41,7 +41,7 @@ macro_rules! define_property { info: $prop, offset: ::core::mem::offset_of!($state, $field) as isize, set_default: false, - ..unsafe { ::core::mem::MaybeUninit::<$crate::bindings::Proper= ty>::zeroed().assume_init() } + ..$crate::zeroable::Zeroable::ZERO } }; } @@ -58,7 +58,7 @@ macro_rules! declare_properties { len }] =3D [ $($prop),*, - unsafe { ::core::mem::MaybeUninit::<$crate::bindings::Property= >::zeroed().assume_init() }, + $crate::zeroable::Zeroable::ZERO, ]; }; } @@ -79,7 +79,7 @@ macro_rules! vm_state_description { $vname.as_ptr() },)* unmigratable: true, - ..unsafe { ::core::mem::MaybeUninit::<$crate::bindings::VMStat= eDescription>::zeroed().assume_init() } + ..$crate::zeroable::Zeroable::ZERO }; } } diff --git a/rust/qemu-api/src/lib.rs b/rust/qemu-api/src/lib.rs index e72fb4b4bb1..91b9459235b 100644 --- a/rust/qemu-api/src/lib.rs +++ b/rust/qemu-api/src/lib.rs @@ -29,6 +29,7 @@ unsafe impl Sync for bindings::VMStateDescription {} =20 pub mod definitions; pub mod device_class; +pub mod zeroable; =20 #[cfg(test)] mod tests; diff --git a/rust/qemu-api/src/zeroable.rs b/rust/qemu-api/src/zeroable.rs new file mode 100644 index 00000000000..927c634b48f --- /dev/null +++ b/rust/qemu-api/src/zeroable.rs @@ -0,0 +1,23 @@ +// SPDX-License-Identifier: GPL-2.0-or-later + +/// Encapsulates the requirement that +/// `MaybeUninit::::zeroed().assume_init()` does not cause +/// undefined behavior. +/// +/// SAFETY: do not add this trait to a type unless all-zeroes is +/// a valid value for the type. In particular, remember that raw +/// pointers can be zero, but references and `NonNull` cannot +/// unless wrapped with `Option<>`. +pub unsafe trait Zeroable: Default { + /// SAFETY: If the trait was added to a type, then by definition + /// this is safe. + const ZERO: Self =3D unsafe { + ::core::mem::MaybeUninit::::zeroed().assume_init() + }; +} + +unsafe impl Zeroable for crate::bindings::Property__bindgen_ty_1 {} +unsafe impl Zeroable for crate::bindings::Property {} +unsafe impl Zeroable for crate::bindings::VMStateDescription {} +unsafe impl Zeroable for crate::bindings::MemoryRegionOps__bindgen_ty_1 {} +unsafe impl Zeroable for crate::bindings::MemoryRegionOps__bindgen_ty_2 {} --=20 2.46.2 From nobody Tue Oct 22 23:33:03 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; 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Fri, 18 Oct 2024 07:43:50 -0700 (PDT) X-Google-Smtp-Source: AGHT+IGrXyip2B7LtCCXl5ep7RbXpHD6dbB/qSAaWohU2BHqVRE/wd2lXAFuBppiS2iDX/opSMiIXw== X-Received: by 2002:adf:fe90:0:b0:374:d25f:101 with SMTP id ffacd0b85a97d-37eab7436eamr1778373f8f.18.1729262630362; Fri, 18 Oct 2024 07:43:50 -0700 (PDT) From: Paolo Bonzini To: qemu-devel@nongnu.org Cc: Manos Pitsidianakis , Junjie Mao Subject: [PATCH 13/13] rust: do not use TYPE_CHARDEV unnecessarily Date: Fri, 18 Oct 2024 16:43:05 +0200 Message-ID: <20241018144306.954716-14-pbonzini@redhat.com> X-Mailer: git-send-email 2.46.2 In-Reply-To: <20241018144306.954716-1-pbonzini@redhat.com> References: <20241018144306.954716-1-pbonzini@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=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.016, 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: 1729262727644116600 Content-Type: text/plain; charset="utf-8" In the invocation of qdev_prop_set_chr(), "chardev" is the name of a property rather than a type and has to match the name of the property in device_class.rs. Do not use TYPE_CHARDEV here, just like in the C version of pl011_create. Signed-off-by: Paolo Bonzini Reviewed-by: Junjie Mao --- rust/hw/char/pl011/src/device.rs | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/rust/hw/char/pl011/src/device.rs b/rust/hw/char/pl011/src/devi= ce.rs index 2b43f5e0939..0f6918dd224 100644 --- a/rust/hw/char/pl011/src/device.rs +++ b/rust/hw/char/pl011/src/device.rs @@ -572,7 +572,7 @@ pub fn update(&self) { let dev: *mut DeviceState =3D qdev_new(PL011State::TYPE_INFO.name); let sysbus: *mut SysBusDevice =3D dev.cast::(); =20 - qdev_prop_set_chr(dev, bindings::TYPE_CHARDEV.as_ptr(), chr); + qdev_prop_set_chr(dev, c"chardev".as_ptr(), chr); sysbus_realize_and_unref(sysbus, addr_of!(error_fatal) as *mut *mu= t Error); sysbus_mmio_map(sysbus, 0, addr); sysbus_connect_irq(sysbus, 0, irq); --=20 2.46.2