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(parent: 08d87c8) | patch
Documentation/hw-vuln: Document the interaction between IBRS and STIBP
authorKP Singh <kpsingh@kernel.org>
Mon, 27 Feb 2023 06:05:41 +0000 (07:05 +0100)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Fri, 10 Mar 2023 08:34:14 +0000 (09:34 +0100)
commit38834acf5917fb305288f9a24945cbf2891b7837
tree3c92dd7b3948cb6cfa40df1c4325d259808c08f8tree | snapshot
parent08d87c87d6461d16827c9b88d84c48c26b6c994acommit | diff
Documentation/hw-vuln: Document the interaction between IBRS and STIBP

commit e02b50ca442e88122e1302d4dbc1b71a4808c13f upstream.

Explain why STIBP is needed with legacy IBRS as currently implemented
(KERNEL_IBRS) and why STIBP is not needed when enhanced IBRS is enabled.

Fixes: 7c693f54c873 ("x86/speculation: Add spectre_v2=ibrs option to support Kernel IBRS")
Signed-off-by: KP Singh <kpsingh@kernel.org>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/20230227060541.1939092-2-kpsingh@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Documentation/admin-guide/hw-vuln/spectre.rst diff | blob | history
Domain: System / Kernel;