From f8858b5eff30d1b2be15ef1ea6285964013b95e6 Mon Sep 17 00:00:00 2001 From: Borislav Petkov Date: Thu, 27 Jan 2022 12:56:26 +0100 Subject: [PATCH] x86/cpu: Remove "noclflush" Not really needed anymore and there's clearcpuid=. Signed-off-by: Borislav Petkov Reviewed-by: Kees Cook Link: https://lore.kernel.org/r/20220127115626.14179-7-bp@alien8.de --- Documentation/admin-guide/kernel-parameters.txt | 2 -- arch/x86/kernel/cpu/common.c | 8 -------- 2 files changed, 10 deletions(-) diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index a2299b2..8c18e7d 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -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. diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c index 5791f69..7dd7604 100644 --- a/arch/x86/kernel/cpu/common.c +++ b/arch/x86/kernel/cpu/common.c @@ -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; -- 2.7.4