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(parent: 91a82b0) | patch
x86/bugs: Keep a per-CPU IA32_SPEC_CTRL value
authorPeter Zijlstra <peterz@infradead.org>
Tue, 14 Jun 2022 21:15:52 +0000 (23:15 +0200)
committerBorislav Petkov <bp@suse.de>
Mon, 27 Jun 2022 08:33:59 +0000 (10:33 +0200)
commit6111cfa5a99b3c2860a0ed6b8e289dee48707fbf
tree39290109cf141e2276936764ff738924cec26c2btree | snapshot
parent91a82b0e4ff289df4f9e2c27d7505b256ada5ff1commit | diff
x86/bugs: Keep a per-CPU IA32_SPEC_CTRL value

Due to TIF_SSBD and TIF_SPEC_IB the actual IA32_SPEC_CTRL value can
differ from x86_spec_ctrl_base. As such, keep a per-CPU value
reflecting the current task's MSR content.

  [jpoimboe: rename]

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
arch/x86/include/asm/nospec-branch.h diff | blob | history
arch/x86/kernel/cpu/bugs.c diff | blob | history
arch/x86/kernel/process.c diff | blob | history
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