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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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a7f290dad3
This patch moves the vdso's to arch/powerpc, adds support for the 32 bits vdso to the 32 bits kernel, rename systemcfg (finally !), and adds some new (still untested) routines to both vdso's: clock_gettime() with support for CLOCK_REALTIME and CLOCK_MONOTONIC, clock_getres() (same clocks) and get_tbfreq() for glibc to retreive the timebase frequency. Tom,Steve: The implementation of get_tbfreq() I've done for 32 bits returns a long long (r3, r4) not a long. This is such that if we ever add support for >4Ghz timebases on ppc32, the userland interface won't have to change. I have tested gettimeofday() using some glibc patches in both ppc32 and ppc64 kernels using 32 bits userland (I haven't had a chance to test a 64 bits userland yet, but the implementation didn't change and was tested earlier). I haven't tested yet the new functions. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
20 lines
508 B
C
20 lines
508 B
C
#ifndef _ASM_POWERPC_AUXVEC_H
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#define _ASM_POWERPC_AUXVEC_H
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/*
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* We need to put in some extra aux table entries to tell glibc what
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* the cache block size is, so it can use the dcbz instruction safely.
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*/
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#define AT_DCACHEBSIZE 19
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#define AT_ICACHEBSIZE 20
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#define AT_UCACHEBSIZE 21
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/* A special ignored type value for PPC, for glibc compatibility. */
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#define AT_IGNOREPPC 22
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/* The vDSO location. We have to use the same value as x86 for glibc's
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* sake :-)
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*/
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#define AT_SYSINFO_EHDR 33
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#endif
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