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a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1770644425; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=qc7A1RXT0YoLYJJSKdWrBC3p51O4szzLV4VpMhyPjlo=; b=Kx/vVE/uU2i2an+Z23+L1986YKPuLDQC5o4JhKLx/p2I5Wv42HvxJqDxqy50W8PojCEIxD FUQL1gXPkAeyIBhKApDb01mvdlos8I2JPQZA67Z2klx5cLbzMWLTuRfmHcizmEXemoxrv0 y1ANRYU6qx6gWv9Qdve6CtbHR7OUCSo= X-MC-Unique: qBsxQSOAPPGVs7dx05QXqQ-1 X-Mimecast-MFC-AGG-ID: qBsxQSOAPPGVs7dx05QXqQ_1770644355 From: Andrea Bolognani To: qemu-devel@nongnu.org Cc: =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= , Pierrick Bouvier , Kashyap Chamarthy , Gerd Hoffmann , Markus Armbruster , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Subject: [PATCH v2 1/1] docs/interop/firmware: Add 'uefi-vars' member for FirmwareMappingMemory Date: Mon, 9 Feb 2026 14:39:06 +0100 Message-ID: <20260209133906.294720-2-abologna@redhat.com> In-Reply-To: <20260209133906.294720-1-abologna@redhat.com> References: <20260209133906.294720-1-abologna@redhat.com> MIME-Version: 1.0 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; 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charset="utf-8" This allows describing firmwares that are loaded as ROMs but also support a UEFI variable store. This is the case for edk2 builds that are set up to use the uefi-vars QEMU device, and whose descriptors would advertise the 'host-uefi-vars' feature. Signed-off-by: Andrea Bolognani --- docs/interop/firmware.json | 44 +++++++++++++++++++++++++++++++++++++- 1 file changed, 43 insertions(+), 1 deletion(-) diff --git a/docs/interop/firmware.json b/docs/interop/firmware.json index da0362a2c0..e51fffa473 100644 --- a/docs/interop/firmware.json +++ b/docs/interop/firmware.json @@ -369,6 +369,39 @@ { 'struct' : 'FirmwareMappingKernel', 'data' : { 'filename' : 'str' } } =20 +## +# @FirmwareMemoryUefiVars: +# +# Contains information needed to set up the "uefi-vars" device +# to provide UEFI variable store access to the firmware. +# +# @template: The path to the UEFI variable store template compatible +# with the firmware. Management software instantiates an +# individual copy -- a specific UEFI variable store file -- from +# @template for each new virtual machine definition created. +# @template itself is never mapped into virtual machines, only +# individual copies of it are. The file created by copying +# @template is used for persistently storing the non-volatile +# UEFI variables of a virtual machine definition. The +# corresponding QEMU command line options are +# +# :: +# +# -device uefi-vars-x64,jsonfile=3DPATH_TO_PRIVATE_FILE +# +# for x86_64 virtual machines, or +# +# :: +# +# -device uefi-vars-sysbus,jsonfile=3DPATH_TO_PRIVATE_FILE +# +# for other UEFI architectures (aarch64, riscv64, loongarch64). +# +# Since: 11.0 +## +{ 'struct' : 'FirmwareMemoryUefiVars', + 'data' : { 'template' : 'str' }} + ## # @FirmwareMappingMemory: # @@ -380,10 +413,19 @@ # definitions. The corresponding QEMU command line option is # "-bios @filename". # +# @uefi-vars: Information specific to firmware builds that expect the +# "uefi-vars" device to be used to provide access to the +# UEFI variable store. If the mapping contains this +# member, the firmware descriptor should advertise the +# @uefi interface from @FirmwareOSInterface as well as +# the @host-uefi-vars feature from @FirmwareFeature. +# Since 11.0 +# # Since: 3.0 ## { 'struct' : 'FirmwareMappingMemory', - 'data' : { 'filename' : 'str' } } + 'data' : { 'filename' : 'str', + '*uefi-vars' : 'FirmwareMemoryUefiVars' } } =20 ## # @FirmwareMappingIgvm: --=20 2.53.0