Date: Thu, 15 Aug 2019 03:42:16 +0000 (UTC) From: Justin Hibbits <jhibbits@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r351065 - in head/sys/powerpc: booke include Message-ID: <201908150342.x7F3gGOG033449@repo.freebsd.org>
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Author: jhibbits Date: Thu Aug 15 03:42:15 2019 New Revision: 351065 URL: https://svnweb.freebsd.org/changeset/base/351065 Log: powerpc/pmap: Enable UMA_MD_SMALL_ALLOC for 64-bit booke The only thing blocking UMA_MD_SMALL_ALLOC from working on 64-bit booke powerpc was a missing check in pmap_kextract(). Adding DMAP handling into pmap_kextract(), we can now use UMA_MD_SMALL_ALLOC. This should improve performance and stability a bit, since DMAP is always mapped in TLB1, so this relieves pressure on TLB0. MFC after: 3 weeks Modified: head/sys/powerpc/booke/pmap.c head/sys/powerpc/include/vmparam.h Modified: head/sys/powerpc/booke/pmap.c ============================================================================== --- head/sys/powerpc/booke/pmap.c Thu Aug 15 02:30:44 2019 (r351064) +++ head/sys/powerpc/booke/pmap.c Thu Aug 15 03:42:15 2019 (r351065) @@ -1958,6 +1958,11 @@ mmu_booke_kextract(mmu_t mmu, vm_offset_t va) vm_paddr_t p = 0; int i; +#ifdef __powerpc64__ + if (va >= DMAP_BASE_ADDRESS && va <= DMAP_MAX_ADDRESS) + return (DMAP_TO_PHYS(va)); +#endif + if (va >= VM_MIN_KERNEL_ADDRESS && va <= VM_MAX_KERNEL_ADDRESS) p = pte_vatopa(mmu, kernel_pmap, va); Modified: head/sys/powerpc/include/vmparam.h ============================================================================== --- head/sys/powerpc/include/vmparam.h Thu Aug 15 02:30:44 2019 (r351064) +++ head/sys/powerpc/include/vmparam.h Thu Aug 15 03:42:15 2019 (r351065) @@ -133,6 +133,11 @@ #else /* Book-E */ +/* Use the direct map for UMA small allocs on powerpc64. */ +#ifdef __powerpc64__ +#define UMA_MD_SMALL_ALLOC +#endif + #define KERNBASE 0x04000100 /* start of kernel physical */ #ifndef __powerpc64__ #define VM_MIN_KERNEL_ADDRESS 0xc0000000
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