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Documentation/hw-vuln: Update spectre doc 

commit 7c693f54c8 ("x86/speculation: Add spectre_v2=ibrs option to support Kernel IBRS")

adds the "ibrs " option  in
Documentation/admin-guide/kernel-parameters.txt but omits it to
Documentation/admin-guide/hw-vuln/spectre.rst, add it.

Signed-off-by: Lin Yujun <linyujun809@huawei.com>
Link: https://lore.kernel.org/r/20220830123614.23007-1-linyujun809@huawei.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This commit is contained in:
Lin Yujun 2022-08-30 20:36:14 +08:00 committed by Jonathan Corbet
parent 622d6f1987
commit 06cb31cc76
1 changed files with 1 additions and 0 deletions
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Documentation/admin-guide/hw-vuln/spectre.rst
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@ -613,6 +613,7 @@ kernel command line.
eibrs enhanced IBRS
eibrs,retpoline enhanced IBRS + Retpolines
eibrs,lfence enhanced IBRS + LFENCE
ibrs use IBRS to protect kernel
Not specifying this option is equivalent to
spectre_v2=auto.