Kim Phillips fd470a8bee x86/cpu: Enable STIBP on AMD if Automatic IBRS is enabled ... Unlike Intel's Enhanced IBRS feature, AMD's Automatic IBRS does not provide protection to processes running at CPL3/user mode, see section "Extended Feature Enable Register (EFER)" in the APM v2 at https://bugzilla.kernel.org/attachment.cgi?id=304652 Explicitly enable STIBP to protect against cross-thread CPL3 branch target injections on systems with Automatic IBRS enabled. Also update the relevant documentation. Fixes: e7862eda30 ("x86/cpu: Support AMD Automatic IBRS") Reported-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: Kim Phillips <kim.phillips@amd.com> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20230720194727.67022-1-kim.phillips@amd.com		2023-07-22 18:04:22 +02:00
..
core-scheduling.rst	uapi/linux/prctl: provide macro definitions for the PR_SCHED_CORE type argument	2021-09-29 13:00:05 +02:00
cross-thread-rsb.rst	Documentation/hw-vuln: Fix rST warning	2023-02-15 07:24:23 -05:00
index.rst	Documentation/hw-vuln: Add documentation for Cross-Thread Return Predictions	2023-02-10 07:27:37 -05:00
l1d_flush.rst	Documentation: Add L1D flushing Documentation	2021-07-28 11:42:25 +02:00
l1tf.rst	docs: add IRQ documentation at the core-api book	2020-05-15 12:00:56 -06:00
mds.rst	docs: move x86 documentation into Documentation/arch/	2023-03-30 12:58:51 -06:00
multihit.rst	x86/bugs/multihit: Fix mitigation reporting when VMX is not in use	2020-08-07 01:32:00 +02:00
processor_mmio_stale_data.rst	x86/bugs: Add "unknown" reporting for MMIO Stale Data	2022-08-18 15:35:22 +02:00
special-register-buffer-data-sampling.rst	docs: admin-guide: hw-vuln: avoid using ReST :doc:foo markup	2021-06-17 13:24:36 -06:00
spectre.rst	x86/cpu: Enable STIBP on AMD if Automatic IBRS is enabled	2023-07-22 18:04:22 +02:00
tsx_async_abort.rst	docs: move x86 documentation into Documentation/arch/	2023-03-30 12:58:51 -06:00