Commit f8858b5e authored by Borislav Petkov's avatar Borislav Petkov
Browse files

x86/cpu: Remove "noclflush" 



Not really needed anymore and there's clearcpuid=.

Signed-off-by: default avatarBorislav Petkov <bp@suse.de>
Reviewed-by: default avatarKees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20220127115626.14179-7-bp@alien8.de
parent 76ea0025

Documentation/admin-guide/kernel-parameters.txt

+0 −2
Original line number Diff line number Diff line
@@ -3444,8 +3444,6 @@ 


	nocache		[ARM]



	noclflush	[BUGS=X86] Don't use the CLFLUSH instruction



	delayacct	[KNL] Enable per-task delay accounting



	nodsp		[SH] Disable hardware DSP at boot time.

arch/x86/kernel/cpu/common.c

+0 −8
Original line number Diff line number Diff line
@@ -1870,14 +1870,6 @@ void identify_secondary_cpu(struct cpuinfo_x86 *c) 
	update_srbds_msr();

}



static __init int setup_noclflush(char *arg)

{

	setup_clear_cpu_cap(X86_FEATURE_CLFLUSH);

	setup_clear_cpu_cap(X86_FEATURE_CLFLUSHOPT);

	return 1;

}

__setup("noclflush", setup_noclflush);



void print_cpu_info(struct cpuinfo_x86 *c)

{

	const char *vendor = NULL;