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| author | Kim Phillips <kim.phillips@amd.com> | 2022-02-28 11:23:15 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-03-11 11:22:37 +0100 |
| commit | b1bacf22a847d21a12900bd6a1eacaecb5bca253 (patch) | |
| tree | acdc7d577161ddc0a2a18f21b17c08fecea5dca1 /Documentation | |
| parent | 1e47ab3df908bbe1b6114374003c7a070ef35f01 (diff) | |
x86/speculation: Use generic retpoline by default on AMD
commit 244d00b5dd4755f8df892c86cab35fb2cfd4f14b upstream.
AMD retpoline may be susceptible to speculation. The speculation
execution window for an incorrect indirect branch prediction using
LFENCE/JMP sequence may potentially be large enough to allow
exploitation using Spectre V2.
By default, don't use retpoline,lfence on AMD. Instead, use the
generic retpoline.
Signed-off-by: Kim Phillips <kim.phillips@amd.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation')
0 files changed, 0 insertions, 0 deletions