Marc Zyngier 9842119a23 arm64: Add CNTFRQ_EL0 trap handler ... We now trap accesses to CNTVCT_EL0 when the counter is broken enough to require the kernel to mediate the access. But it turns out that some existing userspace (such as OpenMPI) do probe for the counter frequency, leading to an UNDEF exception as CNTVCT_EL0 and CNTFRQ_EL0 share the same control bit. The fix is to handle the exception the same way we do for CNTVCT_EL0. Fixes: a86bd139f2 ("arm64: arch_timer: Enable CNTVCT_EL0 trap if workaround is enabled") Reported-by: Hanjun Guo <guohanjun@huawei.com> Tested-by: Hanjun Guo <guohanjun@huawei.com> Reviewed-by: Hanjun Guo <guohanjun@huawei.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>		2017-04-24 12:22:25 +01:00
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asm	arm64: Add CNTFRQ_EL0 trap handler	2017-04-24 12:22:25 +01:00
uapi/asm	arm64: v8.3: Support for weaker release consistency	2017-03-20 16:30:22 +00:00