- 05 6月, 2015 1 次提交
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由 Chris Metcalf 提交于
Previously we were using read_seqcount_begin(), which works fine until lockdep is enabled in the kernel, at which point lockdep locking shows up in the vdso and userspace will take a GPV accessing a kernel-only SPR when calling gettimeofday() etc. Signed-off-by: NChris Metcalf <cmetcalf@ezchip.com>
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- 03 10月, 2014 1 次提交
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由 Chris Metcalf 提交于
This change adds support for clock_gettime with CLOCK_REALTIME and CLOCK_MONOTONIC using vDSO. It also updates the vdso struct nomenclature used for the clocks to match the x86 code to keep it easier to update going forward. We also support the *_COARSE clockid_t, for apps that want speed but aren't concerned about fine-grained timestamps; this saves about 20 cycles per call (see http://lwn.net/Articles/342018/). Signed-off-by: NChris Metcalf <cmetcalf@tilera.com> Acked-by: NJohn Stultz <john.stultz@linaro.org>
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- 02 10月, 2014 1 次提交
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由 Chris Metcalf 提交于
Signed-off-by: NChris Metcalf <cmetcalf@tilera.com>
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- 24 7月, 2014 1 次提交
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由 Thomas Gleixner 提交于
The code was only halfarsed converted to the new VSDO update mechanism and still uses the inaccurate base value which lacks the fractional part of xtime_nsec. Fix it up. Signed-off-by: NThomas Gleixner <tglx@linutronix.de> Signed-off-by: NJohn Stultz <john.stultz@linaro.org>
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- 14 8月, 2013 1 次提交
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由 Chris Metcalf 提交于
This change creates the framework for vDSO calls, makes the existing rt_sigreturn() mechanism use it, and adds a fast gettimeofday(). Now that we need to expose the vDSO address to userspace, we add AT_SYSINFO_EHDR to the set of aux entries provided to userspace. (You can disable any extra vDSO support by booting with vdso=0, but the rt_sigreturn vDSO page will still be provided.) Note that glibc has supported the tile vDSO since release 2.17. Signed-off-by: NChris Metcalf <cmetcalf@tilera.com>
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