diff options
| author | Herbert Xu <herbert@gondor.apana.org.au> | 2020-06-10 14:05:13 +0300 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2020-06-15 12:59:19 +0300 |
| commit | c8a59a4d8e3c9e609fa915e39c3628c6dd08aeea (patch) | |
| tree | 72e9bd7a4ae54215415c53f9b115db34d61f1ddd /arch | |
| parent | b3a9e3b9622ae10064826dccb4f7a52bd88c7407 (diff) | |
| download | linux-c8a59a4d8e3c9e609fa915e39c3628c6dd08aeea.tar.xz | |
x86/microcode: Do not select FW_LOADER
The x86 microcode support works just fine without FW_LOADER. In fact,
these days most people load microcode early during boot so FW_LOADER
never gets into the picture anyway.
As almost everyone on x86 needs to enable MICROCODE, this by extension
means that FW_LOADER is always built into the kernel even if nothing
uses it. The FW_LOADER system is about two thousand lines long and
contains user-space facing interfaces that could potentially provide an
entry point into the kernel (or beyond).
Remove the unnecessary select of FW_LOADER by MICROCODE. People who need
the FW_LOADER capability can still enable it.
[ bp: Massage a bit. ]
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20200610042911.GA20058@gondor.apana.org.au
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/Kconfig | 3 | ||||
| -rw-r--r-- | arch/x86/kernel/cpu/microcode/core.c | 2 |
2 files changed, 0 insertions, 5 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 6a0cc524882d..5c44eacca449 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -1292,7 +1292,6 @@ config MICROCODE bool "CPU microcode loading support" default y depends on CPU_SUP_AMD || CPU_SUP_INTEL - select FW_LOADER help If you say Y here, you will be able to update the microcode on Intel and AMD processors. The Intel support is for the IA32 family, @@ -1314,7 +1313,6 @@ config MICROCODE_INTEL bool "Intel microcode loading support" depends on MICROCODE default MICROCODE - select FW_LOADER help This options enables microcode patch loading support for Intel processors. @@ -1326,7 +1324,6 @@ config MICROCODE_INTEL config MICROCODE_AMD bool "AMD microcode loading support" depends on MICROCODE - select FW_LOADER help If you select this option, microcode patch loading support for AMD processors will be enabled. diff --git a/arch/x86/kernel/cpu/microcode/core.c b/arch/x86/kernel/cpu/microcode/core.c index baec68b7e010..ec6f0415bc6d 100644 --- a/arch/x86/kernel/cpu/microcode/core.c +++ b/arch/x86/kernel/cpu/microcode/core.c @@ -145,7 +145,6 @@ extern struct builtin_fw __end_builtin_fw[]; bool get_builtin_firmware(struct cpio_data *cd, const char *name) { -#ifdef CONFIG_FW_LOADER struct builtin_fw *b_fw; for (b_fw = __start_builtin_fw; b_fw != __end_builtin_fw; b_fw++) { @@ -155,7 +154,6 @@ bool get_builtin_firmware(struct cpio_data *cd, const char *name) return true; } } -#endif return false; } |