From owner-svn-src-all@FreeBSD.ORG Fri Apr 30 03:26:12 2010 Return-Path: Delivered-To: svn-src-all@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 5CE66106566C; Fri, 30 Apr 2010 03:26:12 +0000 (UTC) (envelope-from kmacy@FreeBSD.org) Received: from svn.freebsd.org (svn.freebsd.org [69.147.83.44]) by mx1.freebsd.org (Postfix) with ESMTP id 4D28F8FC0C; Fri, 30 Apr 2010 03:26:12 +0000 (UTC) Received: from svn.freebsd.org (localhost [127.0.0.1]) by svn.freebsd.org (8.14.3/8.14.3) with ESMTP id o3U3QCu5044116; Fri, 30 Apr 2010 03:26:12 GMT (envelope-from kmacy@svn.freebsd.org) Received: (from kmacy@localhost) by svn.freebsd.org (8.14.3/8.14.3/Submit) id o3U3QCpY044113; Fri, 30 Apr 2010 03:26:12 GMT (envelope-from kmacy@svn.freebsd.org) Message-Id: <201004300326.o3U3QCpY044113@svn.freebsd.org> From: Kip Macy Date: Fri, 30 Apr 2010 03:26:12 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org X-SVN-Group: head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Cc: Subject: svn commit: r207419 - head/sys/i386/xen X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 30 Apr 2010 03:26:12 -0000 Author: kmacy Date: Fri Apr 30 03:26:12 2010 New Revision: 207419 URL: http://svn.freebsd.org/changeset/base/207419 Log: merge 194209 in to the i386/xen pmap requested by: alc@ Modified: head/sys/i386/xen/pmap.c Modified: head/sys/i386/xen/pmap.c ============================================================================== --- head/sys/i386/xen/pmap.c Fri Apr 30 03:15:00 2010 (r207418) +++ head/sys/i386/xen/pmap.c Fri Apr 30 03:26:12 2010 (r207419) @@ -289,6 +289,12 @@ SYSCTL_INT(_vm_pmap, OID_AUTO, pv_entry_ "Max number of PV entries"); SYSCTL_INT(_vm_pmap, OID_AUTO, shpgperproc, CTLFLAG_RD, &shpgperproc, 0, "Page share factor per proc"); +SYSCTL_NODE(_vm_pmap, OID_AUTO, pde, CTLFLAG_RD, 0, + "2/4MB page mapping counters"); + +static u_long pmap_pde_mappings; +SYSCTL_ULONG(_vm_pmap_pde, OID_AUTO, mappings, CTLFLAG_RD, + &pmap_pde_mappings, 0, "2/4MB page mappings"); static void free_pv_entry(pmap_t pmap, pv_entry_t pv); static pv_entry_t get_pv_entry(pmap_t locked_pmap, int try); @@ -3130,64 +3136,59 @@ pmap_object_init_pt(pmap_t pmap, vm_offs vm_object_t object, vm_pindex_t pindex, vm_size_t size) { + pd_entry_t *pde; + vm_paddr_t pa, ptepa; vm_page_t p; + int pat_mode; VM_OBJECT_LOCK_ASSERT(object, MA_OWNED); KASSERT(object->type == OBJT_DEVICE || object->type == OBJT_SG, ("pmap_object_init_pt: non-device object")); if (pseflag && - ((addr & (NBPDR - 1)) == 0) && ((size & (NBPDR - 1)) == 0)) { - int i; - vm_page_t m[1]; - unsigned int ptepindex; - int npdes; - pd_entry_t ptepa; - - PMAP_LOCK(pmap); - if (pmap->pm_pdir[ptepindex = (addr >> PDRSHIFT)]) - goto out; - PMAP_UNLOCK(pmap); -retry: + (addr & (NBPDR - 1)) == 0 && (size & (NBPDR - 1)) == 0) { + if (!vm_object_populate(object, pindex, pindex + atop(size))) + return; p = vm_page_lookup(object, pindex); - if (p != NULL) { - if (vm_page_sleep_if_busy(p, FALSE, "init4p")) - goto retry; - } else { - p = vm_page_alloc(object, pindex, VM_ALLOC_NORMAL); - if (p == NULL) - return; - m[0] = p; - - if (vm_pager_get_pages(object, m, 1, 0) != VM_PAGER_OK) { - vm_page_lock_queues(); - vm_page_free(p); - vm_page_unlock_queues(); - return; - } - - p = vm_page_lookup(object, pindex); - vm_page_wakeup(p); - } - + KASSERT(p->valid == VM_PAGE_BITS_ALL, + ("pmap_object_init_pt: invalid page %p", p)); + pat_mode = p->md.pat_mode; + /* + * Abort the mapping if the first page is not physically + * aligned to a 2/4MB page boundary. + */ ptepa = VM_PAGE_TO_PHYS(p); if (ptepa & (NBPDR - 1)) return; - - p->valid = VM_PAGE_BITS_ALL; - + /* + * Skip the first page. Abort the mapping if the rest of + * the pages are not physically contiguous or have differing + * memory attributes. + */ + p = TAILQ_NEXT(p, listq); + for (pa = ptepa + PAGE_SIZE; pa < ptepa + size; + pa += PAGE_SIZE) { + KASSERT(p->valid == VM_PAGE_BITS_ALL, + ("pmap_object_init_pt: invalid page %p", p)); + if (pa != VM_PAGE_TO_PHYS(p) || + pat_mode != p->md.pat_mode) + return; + p = TAILQ_NEXT(p, listq); + } + /* Map using 2/4MB pages. */ PMAP_LOCK(pmap); - pmap->pm_stats.resident_count += size >> PAGE_SHIFT; - npdes = size >> PDRSHIFT; - critical_enter(); - for(i = 0; i < npdes; i++) { - PD_SET_VA(pmap, ptepindex, - ptepa | PG_U | PG_M | PG_RW | PG_V | PG_PS, FALSE); - ptepa += NBPDR; - ptepindex += 1; + for (pa = ptepa | pmap_cache_bits(pat_mode, 1); pa < ptepa + + size; pa += NBPDR) { + pde = pmap_pde(pmap, addr); + if (*pde == 0) { + pde_store(pde, pa | PG_PS | PG_M | PG_A | + PG_U | PG_RW | PG_V); + pmap->pm_stats.resident_count += NBPDR / + PAGE_SIZE; + pmap_pde_mappings++; + } + /* Else continue on if the PDE is already valid. */ + addr += NBPDR; } - pmap_invalidate_all(pmap); - critical_exit(); -out: PMAP_UNLOCK(pmap); } }