This series contains two patches that improve the handling of Spectre v2 user mitigations in the x86 architecture: 1. Make spectre_v2_user_cmd default depend on Kconfig 2. Simplify spectre_v2_user_select_mitigation() using cpu_smt_possible() The first patch was originally part of a larger patchset [1] but was removed in version 3 [2] to simplify the revision process. Now that the original patchset has been merged, I am resubmitting this patch separately. This patch aligns the default configuration of spectre_v2_user_cmd with CONFIG_MITIGATION_SPECTRE_V2, consistent with other user-selectable mitigations. The other patch is a simple optimization that leverages the cpu_smt_possible() helper function to simplify the code in spectre_v2_user_select_mitigation(). Together, these changes improve code consistency and simplify the configuration and selection of Spectre v2 user mitigations. [1] https://lore.kernel.org/all/20240118173213.2008115-4-leitao@xxxxxxxxxx/ [2] https://lore.kernel.org/all/20240422165830.2142904-1-leitao@xxxxxxxxxx/ Changelog: v2: * Added the documentation bits in kernel-parameters.txt, as suggested by Pawan. v1: * https://lore.kernel.org/all/20241015105107.496105-1-leitao@xxxxxxxxxx/#r Signed-off-by: Breno Leitao <leitao@xxxxxxxxxx> --- Breno Leitao (2): x86/bugs: Use cpu_smt_possible helper x86/bugs: spectre user default must depend on MITIGATION_SPECTRE_V2 Documentation/admin-guide/kernel-parameters.txt | 2 ++ arch/x86/kernel/cpu/bugs.c | 17 ++++++++--------- 2 files changed, 10 insertions(+), 9 deletions(-) --- base-commit: 81983758430957d9a5cb3333fe324fd70cf63e7e change-id: 20241031-x86_bugs_last_v2-adf8f107fd1e Best regards, -- Breno Leitao <leitao@xxxxxxxxxx>
