diff options
| author | James Morse <james.morse@arm.com> | 2024-08-19 14:15:53 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-05-18 08:26:08 +0200 |
| commit | aa32707744d6240b80b7abf5a46e6e0dffe27b7d (patch) | |
| tree | da92bce6b07c779653d822af5e72e63dcaa7aad7 /include/net/aligned_data.h | |
| parent | 1e19632057847914a36edc9f02a4da13bcb8b92a (diff) | |
arm64: proton-pack: Expose whether the platform is mitigated by firmware
commit e7956c92f396a44eeeb6eaf7a5b5e1ad24db6748 upstream.
is_spectre_bhb_fw_affected() allows the caller to determine if the CPU
is known to need a firmware mitigation. CPUs are either on the list
of CPUs we know about, or firmware has been queried and reported that
the platform is affected - and mitigated by firmware.
This helper is not useful to determine if the platform is mitigated
by firmware. A CPU could be on the know list, but the firmware may
not be implemented. Its affected but not mitigated.
spectre_bhb_enable_mitigation() handles this distinction by checking
the firmware state before enabling the mitigation.
Add a helper to expose this state. This will be used by the BPF JIT
to determine if calling firmware for a mitigation is necessary and
supported.
Signed-off-by: James Morse <james.morse@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/net/aligned_data.h')
0 files changed, 0 insertions, 0 deletions