x86/speculation: Rework speculative_store_bypass_update()

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commit 0270be3e34 upstream

The upcoming support for the virtual SPEC_CTRL MSR on AMD needs to reuse
speculative_store_bypass_update() to avoid code duplication. Add an
argument for supplying a thread info (TIF) value and create a wrapper
speculative_store_bypass_update_current() which is used at the existing
call site.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Thomas Gleixner 2018-05-10 20:31:44 +02:00 • committed by Greg Kroah-Hartman

parent 8e1c285a05

commit 3e6ab4ca13

3 changed files with 9 additions and 4 deletions

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7

arch/x86/include/asm/spec-ctrl.h

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2

arch/x86/kernel/cpu/bugs.c

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4

arch/x86/kernel/process.c

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