diff options
| author | Will Deacon <will@kernel.org> | 2021-07-30 13:24:41 +0200 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2021-08-20 12:33:07 +0200 |
| commit | ead7de462ae56b2d2e56fb5a414f6e916dddc4c9 (patch) | |
| tree | 6bd5c5cf36d56e92a9e81a30bfb49ec4ef37f621 /arch/arm64 | |
| parent | arm64: Advertise CPUs capable of running 32-bit applications in sysfs (diff) | |
| download | linux-ead7de462ae56b2d2e56fb5a414f6e916dddc4c9.tar.xz linux-ead7de462ae56b2d2e56fb5a414f6e916dddc4c9.zip | |
arm64: Hook up cmdline parameter to allow mismatched 32-bit EL0
Allow systems with mismatched 32-bit support at EL0 to run 32-bit
applications based on a new kernel parameter.
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/r/20210730112443.23245-15-will@kernel.org
Diffstat (limited to 'arch/arm64')
| -rw-r--r-- | arch/arm64/kernel/cpufeature.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index 0a9bc7eff26e..77b2149c26b8 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -1322,6 +1322,13 @@ const struct cpumask *system_32bit_el0_cpumask(void) return cpu_possible_mask; } +static int __init parse_32bit_el0_param(char *str) +{ + allow_mismatched_32bit_el0 = true; + return 0; +} +early_param("allow_mismatched_32bit_el0", parse_32bit_el0_param); + static ssize_t aarch32_el0_show(struct device *dev, struct device_attribute *attr, char *buf) { |