add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/base/firmware_loader/Kconfig
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+# SPDX-License-Identifier: GPL-2.0
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 menu "Firmware loader"
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 config FW_LOADER
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@@ -24,6 +25,9 @@
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 	  enable built-in firmware (CONFIG_EXTRA_FIRMWARE).
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 if FW_LOADER
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+
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+config FW_LOADER_PAGED_BUF
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+	bool
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 config EXTRA_FIRMWARE
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 	string "Build named firmware blobs into the kernel binary"
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@@ -66,6 +70,7 @@
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 config FW_LOADER_USER_HELPER
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 	bool "Enable the firmware sysfs fallback mechanism"
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+	select FW_LOADER_PAGED_BUF
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 	help
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 	  This option enables a sysfs loading facility to enable firmware
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 	  loading to the kernel through userspace as a fallback mechanism
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@@ -143,13 +148,27 @@
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 	  to be used for all firmware requests which explicitly do not disable a
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 	  a fallback mechanism. Firmware calls which do prohibit a fallback
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 	  mechanism is request_firmware_direct(). This option is kept for
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-          backward compatibility purposes given this precise mechanism can also
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+	  backward compatibility purposes given this precise mechanism can also
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 	  be enabled by setting the proc sysctl value to true:
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 	       /proc/sys/kernel/firmware_config/force_sysfs_fallback
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 	  If you are unsure about this, say N here.
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+config FW_LOADER_COMPRESS
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+	bool "Enable compressed firmware support"
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+	select FW_LOADER_PAGED_BUF
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+	select XZ_DEC
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+	help
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+	  This option enables the support for loading compressed firmware
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+	  files. The caller of firmware API receives the decompressed file
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+	  content. The compressed file is loaded as a fallback, only after
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+	  loading the raw file failed at first.
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+
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+	  Currently only XZ-compressed files are supported, and they have to
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+	  be compressed with either none or crc32 integrity check type (pass
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+	  "-C crc32" option to xz command).
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+
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 config FW_CACHE
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 	bool "Enable firmware caching during suspend"
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 	depends on PM_SLEEP