| author | Ralf Ramsauer <ralf.ramsauer@oth-regensburg.de> | |
| Thu, 3 Jan 2019 18:06:46 +0000 (19:06 +0100) | ||
| committer | Jan Kiszka <jan.kiszka@siemens.com> | |
| Fri, 4 Jan 2019 07:33:36 +0000 (08:33 +0100) | ||
| commit | ea924a3fec98684863f6abbdd2860d1ae5c1ea53 | |
| tree | c3c48c971ce73be2922726dee97f3965e039f553 | tree | snapshot (tar.xz tar.gz zip) |
| parent | 03d09b9c3b119ea704edafdd9f358ce57e2a829f | commit | diff |
arm64: Initialise SMCCC backend
by discovering its features.
The first step is to check the PSCI version. Don't even try to do any
SMCCC calls without having checked the proper PSCI version (current QEMU
horribly crashes).
Probe if SMCCC_ARCH_FEATURES is available. If so, probe for
SMCCC_ARCH_WORKAROUND_1 and expose its availability by setting a flag
inside the percpu structure.
The availability is stored per-cpu, as we might have big.LITTLE systems,
where only a subset of cores need mitigations.
Signed-off-by: Ralf Ramsauer <ralf.ramsauer@oth-regensburg.de>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
by discovering its features.
The first step is to check the PSCI version. Don't even try to do any
SMCCC calls without having checked the proper PSCI version (current QEMU
horribly crashes).
Probe if SMCCC_ARCH_FEATURES is available. If so, probe for
SMCCC_ARCH_WORKAROUND_1 and expose its availability by setting a flag
inside the percpu structure.
The availability is stored per-cpu, as we might have big.LITTLE systems,
where only a subset of cores need mitigations.
Signed-off-by: Ralf Ramsauer <ralf.ramsauer@oth-regensburg.de>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>