Module Name: src Committed By: bouyer Date: Mon Feb 20 20:49:12 UTC 2012
Modified Files: src/sys/arch/x86/x86: pmap.c Log Message: - Make pmap_write_protect() work with pmap_kernel() too ((va & L2_FRAME) strips the high bits of a LP64 address) - use pmap_protect() in pmap_pdp_ctor() to remap the PDP read-only instead of (ab)using pmap_kenter_pa(). No more "mapping already present" on console with DIAGNOSTIC kernels - make sure to zero the whole PDP (NTOPLEVEL_PDES doens't include high-level entries on i386 and i386PAE, reserved by Xen). Not sure how it has worked before - remove an always-true test (&& pmap != pmap_kernel(); we KASSERT that at the function entry). To generate a diff of this commit: cvs rdiff -u -r1.165 -r1.166 src/sys/arch/x86/x86/pmap.c Please note that diffs are not public domain; they are subject to the copyright notices on the relevant files.
Modified files: Index: src/sys/arch/x86/x86/pmap.c diff -u src/sys/arch/x86/x86/pmap.c:1.165 src/sys/arch/x86/x86/pmap.c:1.166 --- src/sys/arch/x86/x86/pmap.c:1.165 Fri Feb 17 18:40:19 2012 +++ src/sys/arch/x86/x86/pmap.c Mon Feb 20 20:49:12 2012 @@ -1,4 +1,4 @@ -/* $NetBSD: pmap.c,v 1.165 2012/02/17 18:40:19 bouyer Exp $ */ +/* $NetBSD: pmap.c,v 1.166 2012/02/20 20:49:12 bouyer Exp $ */ /*- * Copyright (c) 2008, 2010 The NetBSD Foundation, Inc. @@ -171,7 +171,7 @@ */ #include <sys/cdefs.h> -__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.165 2012/02/17 18:40:19 bouyer Exp $"); +__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.166 2012/02/20 20:49:12 bouyer Exp $"); #include "opt_user_ldt.h" #include "opt_lockdebug.h" @@ -1979,7 +1979,7 @@ pmap_get_ptp(struct pmap *pmap, vaddr_t pmap_pte_set(&pva[index], (pd_entry_t) (pmap_pa2pte(pa) | PG_u | PG_RW | PG_V)); #if defined(XEN) && defined(__x86_64__) - if(i == PTP_LEVELS && pmap != pmap_kernel()) { + if(i == PTP_LEVELS) { /* * Update the per-cpu PD on all cpus the current * pmap is active on @@ -2090,8 +2090,8 @@ pmap_pdp_ctor(void *arg, void *v, int fl npde * sizeof(pd_entry_t)); /* zero the rest */ - memset(&pdir[PDIR_SLOT_KERN + npde], 0, - (NTOPLEVEL_PDES - (PDIR_SLOT_KERN + npde)) * sizeof(pd_entry_t)); + memset(&pdir[PDIR_SLOT_KERN + npde], 0, (PAGE_SIZE * PDP_SIZE) - + (PDIR_SLOT_KERN + npde) * sizeof(pd_entry_t)); if (VM_MIN_KERNEL_ADDRESS != KERNBASE) { int idx = pl_i(KERNBASE, PTP_LEVELS); @@ -2107,11 +2107,10 @@ pmap_pdp_ctor(void *arg, void *v, int fl #ifdef XEN s = splvm(); object = (vaddr_t)v; + pmap_protect(pmap_kernel(), object, object + (PAGE_SIZE * PDP_SIZE), + VM_PROT_READ); + pmap_update(pmap_kernel()); for (i = 0; i < PDP_SIZE; i++, object += PAGE_SIZE) { - (void) pmap_extract(pmap_kernel(), object, &pdirpa); - /* FIXME: This should use pmap_protect() .. */ - pmap_kenter_pa(object, pdirpa, VM_PROT_READ, 0); - pmap_update(pmap_kernel()); /* * pin as L2/L4 page, we have to do the page with the * PDIR_SLOT_PTE entries last @@ -2121,6 +2120,7 @@ pmap_pdp_ctor(void *arg, void *v, int fl continue; #endif + (void) pmap_extract(pmap_kernel(), object, &pdirpa); #ifdef __x86_64__ xpq_queue_pin_l4_table(xpmap_ptom_masked(pdirpa)); #else @@ -3779,7 +3779,7 @@ pmap_write_protect(struct pmap *pmap, va pt_entry_t *spte, *epte; int i; - blockend = (va & L2_FRAME) + NBPD_L2; + blockend = x86_round_pdr(va + 1); if (blockend > eva) blockend = eva;