Date: Sun, 31 Jul 2016 12:59:11 +0000 (UTC) From: Andrew Turner <andrew@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r303585 - head/sys/arm64/arm64 Message-ID: <201607311259.u6VCxBOK061958@repo.freebsd.org>
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Author: andrew Date: Sun Jul 31 12:59:10 2016 New Revision: 303585 URL: https://svnweb.freebsd.org/changeset/base/303585 Log: Relax the barriers around a TLB invalidation to only wait on inner-shareable memory accesses. There is no need for full system barriers. Obtained from: ABT Systems Ltd MFC after: 1 month Sponsored by: The FreeBSD Foundation Modified: head/sys/arm64/arm64/pmap.c Modified: head/sys/arm64/arm64/pmap.c ============================================================================== --- head/sys/arm64/arm64/pmap.c Sun Jul 31 12:11:55 2016 (r303584) +++ head/sys/arm64/arm64/pmap.c Sun Jul 31 12:59:10 2016 (r303585) @@ -865,9 +865,9 @@ pmap_invalidate_page(pmap_t pmap, vm_off sched_pin(); __asm __volatile( - "dsb sy \n" + "dsb ishst \n" "tlbi vaae1is, %0 \n" - "dsb sy \n" + "dsb ish \n" "isb \n" : : "r"(va >> PAGE_SHIFT)); sched_unpin(); @@ -879,13 +879,13 @@ pmap_invalidate_range(pmap_t pmap, vm_of vm_offset_t addr; sched_pin(); - __asm __volatile("dsb sy"); + dsb(ishst); for (addr = sva; addr < eva; addr += PAGE_SIZE) { __asm __volatile( "tlbi vaae1is, %0" : : "r"(addr >> PAGE_SHIFT)); } __asm __volatile( - "dsb sy \n" + "dsb ish \n" "isb \n"); sched_unpin(); } @@ -896,9 +896,9 @@ pmap_invalidate_all(pmap_t pmap) sched_pin(); __asm __volatile( - "dsb sy \n" + "dsb ishst \n" "tlbi vmalle1is \n" - "dsb sy \n" + "dsb ish \n" "isb \n"); sched_unpin(); }
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