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[88.187.86.199]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-43bdd8db6c7sm58089865e9.22.2025.03.07.10.04.33 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Fri, 07 Mar 2025 10:04:34 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1741370675; x=1741975475; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=jwX1K0+iQl31BRmPX8xi9KD5c4T56nkQjSQYXLzdF0A=; b=FsaGK+bYWMrrh1VO/iXLetGyjlNAB0rEFx8h9NyObQsRr6MS2DfTywFCRUkVvOIcGt +DIs3wJQTNioNiisTopZ+5iyTWkIoRsUZ+ALNIVb8Ec20ZD5W1vRxz850koLIAoYd4y6 o1Z58s/32fdXayGgmPpS4np3kTxQiRlAY5AvkulUGiEx+aSaiHAserAAlqo1BAI/UpL7 4vvZVnG9k2Ik0QVWLvBbnhJ7GTx75sjSiHm0xGdW1jTYeO5/I+lkLBgVjOiH7H/WXEKC +lgPvcxwERvxAH4GPZpprbgP7WThhj9+pJ4g4GR8QyTafwzDDz7pfQzEIl9MKqbBVdJn AKyA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1741370675; x=1741975475; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=jwX1K0+iQl31BRmPX8xi9KD5c4T56nkQjSQYXLzdF0A=; b=sSR/rFklsuREpW9wiTEsfEgX46fFQunSiGXJUZK5RoD44OT+DVXmQh2Jgk4RIkgtjC 8OOGElHrG9q+KAV6lc8vsURlkyIviuIlpJEJ7OAfG82a+idsyCovkXBm6HmRwtrGXVqS G89VzbYzeRm44yVavP59msIE4Io5G4Wyk/DnmLEBsEITXZuyPec6fuezB+d0nByOCNx5 U+AOMVQBOY768QqhIAqgI3e5ponWOBX7wYkNojPMRq0I8PV2qvg85CzQIXC8M+6KqExx BoKW1Hz/B6Juy2/PDt22gLsJu7nIO4ca1+kUcz4hzvvAH9adpgI+/JQUUpF1jHh/Z+f+ YlMg== X-Gm-Message-State: AOJu0YzgQFDehffAtH4O1+wOksbWmkXTxq6iIM38qtxwQcDfpVFyxURY lg7SMwqHLtp+icyErwgKVpifhs4+vKSASTc4ZEeJjVCqyTl/uuD7jSx7uepRBPXwNTNUtReCED3 iAe0= X-Gm-Gg: ASbGncsEXp3Ypc6kfrm/kYA2vOFm6HMvyM3ys9zL/j9Ld24ZO5Lq0X5Ejoc2zlPBGr4 Al1NaQm5zvNhcJbK4CFZ4yu9GClv2cC9lLqCo4KRNGAG+9Qgjs+uk2gZ8n3JT811udcwHegipxI +Au08cB2vkuJbYWAdOKPXWMOGGlYhQdJSMC+CGKWYBVpBVp5bH8pAo/iAxNiiqxJ/c6QpEwv3xB ZfC+H4RNoHLgnqHEyQxkOY+7NDXaSkEn5urncb6LyWu9buJagvngIPejNbhJNmAqTDV8yqTBW7j Y/5fuWL1PIHabNBynka6D9mC+o3Gbrzdv22pveKw52ON2u5IRDx7eick+Bs4NDshOFxsGaoFrxZ KsZKieqO5dVG4v9iwXBY= X-Google-Smtp-Source: AGHT+IFd2dAhiRB8kpwGRBj8I24YTq49QXdG4iwSMQDOtTBB781rulRfrC60gif1x5YVtYtrXppgDw== X-Received: by 2002:a05:600c:350a:b0:439:86fb:7326 with SMTP id 5b1f17b1804b1-43c602082a0mr29865065e9.22.1741370675155; Fri, 07 Mar 2025 10:04:35 -0800 (PST) From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= To: qemu-devel@nongnu.org Cc: Alex Williamson , Igor Mammedov , qemu-ppc@nongnu.org, Thomas Huth , Richard Henderson , Tony Krowiak , Ilya Leoshkevich , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , kvm@vger.kernel.org, Yi Liu , Paolo Bonzini , Zhenzhong Duan , Matthew Rosato , Eric Farman , Peter Xu , Pierrick Bouvier , Daniel Henrique Barboza , Eric Auger , qemu-s390x@nongnu.org, Jason Herne , =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= , David Hildenbrand , =?UTF-8?q?Alex=20Benn=C3=A9e?= , Harsh Prateek Bora , Nicholas Piggin , Halil Pasic , Christian Borntraeger Subject: [PATCH 10/14] system/iommufd: Introduce iommufd_builtin() helper Date: Fri, 7 Mar 2025 19:03:33 +0100 Message-ID: <20250307180337.14811-11-philmd@linaro.org> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20250307180337.14811-1-philmd@linaro.org> References: <20250307180337.14811-1-philmd@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" 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=2a00:1450:4864:20::332; envelope-from=philmd@linaro.org; helo=mail-wm1-x332.google.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, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, 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: 2.1.29 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 @linaro.org) X-ZM-MESSAGEID: 1741370752354019100 iommufd_builtin() can be used to check at runtime whether the IOMMUFD feature is built in a qemu-system binary. Signed-off-by: Philippe Mathieu-Daud=C3=A9 Reviewed-by: Pierrick Bouvier Reviewed-by: Richard Henderson --- docs/devel/vfio-iommufd.rst | 2 +- include/system/iommufd.h | 8 ++++++++ 2 files changed, 9 insertions(+), 1 deletion(-) diff --git a/docs/devel/vfio-iommufd.rst b/docs/devel/vfio-iommufd.rst index 3d1c11f175e..08882094eee 100644 --- a/docs/devel/vfio-iommufd.rst +++ b/docs/devel/vfio-iommufd.rst @@ -88,7 +88,7 @@ Step 2: configure QEMU ---------------------- =20 Interactions with the ``/dev/iommu`` are abstracted by a new iommufd -object (compiled in with the ``CONFIG_IOMMUFD`` option). +object (which availability can be checked at runtime using ``iommufd_built= in()``). =20 Any QEMU device (e.g. VFIO device) wishing to use ``/dev/iommu`` must be linked with an iommufd object. It gets a new optional property diff --git a/include/system/iommufd.h b/include/system/iommufd.h index cbab75bfbf6..ce459254025 100644 --- a/include/system/iommufd.h +++ b/include/system/iommufd.h @@ -63,4 +63,12 @@ bool iommufd_backend_get_dirty_bitmap(IOMMUFDBackend *be= , uint32_t hwpt_id, Error **errp); =20 #define TYPE_HOST_IOMMU_DEVICE_IOMMUFD TYPE_HOST_IOMMU_DEVICE "-iommufd" + +static inline bool iommufd_builtin(void) +{ + bool ambig =3D false; + + return object_resolve_path_type("", TYPE_IOMMUFD_BACKEND, &ambig) || a= mbig; +} + #endif --=20 2.47.1