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[83.53.161.74]) by smtp.gmail.com with ESMTPSA id z15sm8376143wrv.94.2020.10.01.08.37.27 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 01 Oct 2020 08:37:28 -0700 (PDT) Subject: Re: [PATCH v4 3/3] target/i386: Restrict X86CPUFeatureWord to X86 targets To: Eduardo Habkost References: <20201001144152.1555659-1-philmd@redhat.com> <20201001144152.1555659-4-philmd@redhat.com> <20201001152905.GC3717385@habkost.net> From: =?UTF-8?Q?Philippe_Mathieu-Daud=c3=a9?= Autocrypt: addr=philmd@redhat.com; keydata= mQINBDXML8YBEADXCtUkDBKQvNsQA7sDpw6YLE/1tKHwm24A1au9Hfy/OFmkpzo+MD+dYc+7 bvnqWAeGweq2SDq8zbzFZ1gJBd6+e5v1a/UrTxvwBk51yEkadrpRbi+r2bDpTJwXc/uEtYAB GvsTZMtiQVA4kRID1KCdgLa3zztPLCj5H1VZhqZsiGvXa/nMIlhvacRXdbgllPPJ72cLUkXf z1Zu4AkEKpccZaJspmLWGSzGu6UTZ7UfVeR2Hcc2KI9oZB1qthmZ1+PZyGZ/Dy+z+zklC0xl XIpQPmnfy9+/1hj1LzJ+pe3HzEodtlVA+rdttSvA6nmHKIt8Ul6b/h1DFTmUT1lN1WbAGxmg CH1O26cz5nTrzdjoqC/b8PpZiT0kO5MKKgiu5S4PRIxW2+RA4H9nq7nztNZ1Y39bDpzwE5Sp bDHzd5owmLxMLZAINtCtQuRbSOcMjZlg4zohA9TQP9krGIk+qTR+H4CV22sWldSkVtsoTaA2 qNeSJhfHQY0TyQvFbqRsSNIe2gTDzzEQ8itsmdHHE/yzhcCVvlUzXhAT6pIN0OT+cdsTTfif MIcDboys92auTuJ7U+4jWF1+WUaJ8gDL69ThAsu7mGDBbm80P3vvUZ4fQM14NkxOnuGRrJxO qjWNJ2ZUxgyHAh5TCxMLKWZoL5hpnvx3dF3Ti9HW2dsUUWICSQARAQABtDJQaGlsaXBwZSBN YXRoaWV1LURhdWTDqSAoUGhpbCkgPHBoaWxtZEByZWRoYXQuY29tPokCVQQTAQgAPwIbDwYL CQgHAwIGFQgCCQoLBBYCAwECHgECF4AWIQSJweePYB7obIZ0lcuio/1u3q3A3gUCXsfWwAUJ KtymWgAKCRCio/1u3q3A3ircD/9Vjh3aFNJ3uF3hddeoFg1H038wZr/xi8/rX27M1Vj2j9VH 0B8Olp4KUQw/hyO6kUxqkoojmzRpmzvlpZ0cUiZJo2bQIWnvScyHxFCv33kHe+YEIqoJlaQc JfKYlbCoubz+02E2A6bFD9+BvCY0LBbEj5POwyKGiDMjHKCGuzSuDRbCn0Mz4kCa7nFMF5Jv piC+JemRdiBd6102ThqgIsyGEBXuf1sy0QIVyXgaqr9O2b/0VoXpQId7yY7OJuYYxs7kQoXI 6WzSMpmuXGkmfxOgbc/L6YbzB0JOriX0iRClxu4dEUg8Bs2pNnr6huY2Ft+qb41RzCJvvMyu gS32LfN0bTZ6Qm2A8ayMtUQgnwZDSO23OKgQWZVglGliY3ezHZ6lVwC24Vjkmq/2yBSLakZE 6DZUjZzCW1nvtRK05ebyK6tofRsx8xB8pL/kcBb9nCuh70aLR+5cmE41X4O+MVJbwfP5s/RW 9BFSL3qgXuXso/3XuWTQjJJGgKhB6xXjMmb1J4q/h5IuVV4juv1Fem9sfmyrh+Wi5V1IzKI7 RPJ3KVb937eBgSENk53P0gUorwzUcO+ASEo3Z1cBKkJSPigDbeEjVfXQMzNt0oDRzpQqH2vp apo2jHnidWt8BsckuWZpxcZ9+/9obQ55DyVQHGiTN39hkETy3Emdnz1JVHTU0Q== Message-ID: <27bf4922-545e-e7e5-29fa-1dd80283e41a@redhat.com> Date: Thu, 1 Oct 2020 17:37:26 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.11.0 MIME-Version: 1.0 In-Reply-To: <20201001152905.GC3717385@habkost.net> Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=philmd@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=63.128.21.124; envelope-from=philmd@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/10/01 02:15:30 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -23 X-Spam_score: -2.4 X-Spam_bar: -- X-Spam_report: (-2.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, NICE_REPLY_A=-0.26, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: qemu-devel@nongnu.org, Richard Henderson , Michael Tokarev , Markus Armbruster , Laurent Vivier , qemu-trivial@nongnu.org, Paolo Bonzini , Richard Henderson Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 10/1/20 5:29 PM, Eduardo Habkost wrote: > On Thu, Oct 01, 2020 at 04:41:52PM +0200, Philippe Mathieu-Daudé wrote: >> Only qemu-system-FOO and qemu-storage-daemon provide QMP >> monitors, therefore such declarations and definitions are >> irrelevant for user-mode emulation. >> >> Restricting the x86-specific commands to machine-target.json >> pulls less QAPI-generated code into user-mode. > > Is this still true without "qapi: Restrict code generated for > user-mode"? The correct description so far is: "Restricting the x86-specific commands to machine-target.json pulls less QAPI-generated code into non-x86 targets.", as of this commit the X86CPURegister32 definitions are not built in the other ARM/S390/PPC/... targets. I still have some hope "qapi: Restrict code generated for user-mode" get merged some day. > > Markus, Eric: what's the difference between machine.json and > machine-target.json? commit 7f7b4e7abef4 ("qapi: Split > machine-target.json off target.json and misc.json") explains what > but not why. > >> >> Acked-by: Richard Henderson >> Signed-off-by: Philippe Mathieu-Daudé > > Why the visit_type_X86CPUFeatureWordInfoList() stub was required > in v3, but not in this version? Because it is ifdef'ed out in the previous (new) patch: "target/i386/cpu: Restrict some of feature-words uses to system-mode". > > >> --- >> qapi/machine-target.json | 45 ++++++++++++++++++++++++++++++++++++++++ >> qapi/machine.json | 42 ------------------------------------- >> target/i386/cpu.c | 2 +- >> 3 files changed, 46 insertions(+), 43 deletions(-) >> >> diff --git a/qapi/machine-target.json b/qapi/machine-target.json >> index 698850cc78..b4d769a53b 100644 >> --- a/qapi/machine-target.json >> +++ b/qapi/machine-target.json >> @@ -4,6 +4,51 @@ >> # This work is licensed under the terms of the GNU GPL, version 2 or later. >> # See the COPYING file in the top-level directory. >> >> +## >> +# @X86CPURegister32: >> +# >> +# A X86 32-bit register >> +# >> +# Since: 1.5 >> +## >> +{ 'enum': 'X86CPURegister32', >> + 'data': [ 'EAX', 'EBX', 'ECX', 'EDX', 'ESP', 'EBP', 'ESI', 'EDI' ], >> + 'if': 'defined(TARGET_I386)' } >> + >> +## >> +# @X86CPUFeatureWordInfo: >> +# >> +# Information about a X86 CPU feature word >> +# >> +# @cpuid-input-eax: Input EAX value for CPUID instruction for that feature word >> +# >> +# @cpuid-input-ecx: Input ECX value for CPUID instruction for that >> +# feature word >> +# >> +# @cpuid-register: Output register containing the feature bits >> +# >> +# @features: value of output register, containing the feature bits >> +# >> +# Since: 1.5 >> +## >> +{ 'struct': 'X86CPUFeatureWordInfo', >> + 'data': { 'cpuid-input-eax': 'int', >> + '*cpuid-input-ecx': 'int', >> + 'cpuid-register': 'X86CPURegister32', >> + 'features': 'int' }, >> + 'if': 'defined(TARGET_I386)' } >> + >> +## >> +# @DummyForceArrays: >> +# >> +# Not used by QMP; hack to let us use X86CPUFeatureWordInfoList internally >> +# >> +# Since: 2.5 >> +## >> +{ 'struct': 'DummyForceArrays', >> + 'data': { 'unused': ['X86CPUFeatureWordInfo'] }, >> + 'if': 'defined(TARGET_I386)' } >> + >> ## >> # @CpuModelInfo: >> # >> diff --git a/qapi/machine.json b/qapi/machine.json >> index 756dacb06f..995e972858 100644 >> --- a/qapi/machine.json >> +++ b/qapi/machine.json >> @@ -574,48 +574,6 @@ >> 'dst': 'uint16', >> 'val': 'uint8' }} >> >> -## >> -# @X86CPURegister32: >> -# >> -# A X86 32-bit register >> -# >> -# Since: 1.5 >> -## >> -{ 'enum': 'X86CPURegister32', >> - 'data': [ 'EAX', 'EBX', 'ECX', 'EDX', 'ESP', 'EBP', 'ESI', 'EDI' ] } >> - >> -## >> -# @X86CPUFeatureWordInfo: >> -# >> -# Information about a X86 CPU feature word >> -# >> -# @cpuid-input-eax: Input EAX value for CPUID instruction for that feature word >> -# >> -# @cpuid-input-ecx: Input ECX value for CPUID instruction for that >> -# feature word >> -# >> -# @cpuid-register: Output register containing the feature bits >> -# >> -# @features: value of output register, containing the feature bits >> -# >> -# Since: 1.5 >> -## >> -{ 'struct': 'X86CPUFeatureWordInfo', >> - 'data': { 'cpuid-input-eax': 'int', >> - '*cpuid-input-ecx': 'int', >> - 'cpuid-register': 'X86CPURegister32', >> - 'features': 'int' } } >> - >> -## >> -# @DummyForceArrays: >> -# >> -# Not used by QMP; hack to let us use X86CPUFeatureWordInfoList internally >> -# >> -# Since: 2.5 >> -## >> -{ 'struct': 'DummyForceArrays', >> - 'data': { 'unused': ['X86CPUFeatureWordInfo'] } } >> - >> ## >> # @NumaCpuOptions: >> # >> diff --git a/target/i386/cpu.c b/target/i386/cpu.c >> index 9f72342506..848a65ded2 100644 >> --- a/target/i386/cpu.c >> +++ b/target/i386/cpu.c >> @@ -38,7 +38,7 @@ >> #include "qemu/option.h" >> #include "qemu/config-file.h" >> #include "qapi/error.h" >> -#include "qapi/qapi-visit-machine.h" >> +#include "qapi/qapi-visit-machine-target.h" >> #include "qapi/qapi-visit-run-state.h" >> #include "qapi/qmp/qdict.h" >> #include "qapi/qmp/qerror.h" >> -- >> 2.26.2 >> >