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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)
committerBorislav Petkov (AMD) <bp@alien8.de>
Mon, 27 Feb 2023 18:02:47 +0000 (19:02 +0100)
commite02b50ca442e88122e1302d4dbc1b71a4808c13f
tree1b76a2583ed67d4d87e6fcccdc3104f428fa971ftree | snapshot
parent6921ed9049bc7457f66c1596c5b78aec0dae4a9dcommit | diff
Documentation/hw-vuln: Document the interaction between IBRS and STIBP

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
Documentation/admin-guide/hw-vuln/spectre.rst diff | blob | history
Domain: System / Kernel;