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Implement pmap_remove_all().

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This commit is contained in:
ad 2008-05-03 00:21:35 +00:00
parent 07c5538d1f
commit 3a991d1e4a
2 changed files with 29 additions and 10 deletions
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11
sys/arch/x86/include/pmap.h
View File

@ -1,4 +1,4 @@
/* $NetBSD: pmap.h,v 1.12 2008/01/23 19:46:45 bouyer Exp $ */
/* $NetBSD: pmap.h,v 1.13 2008/05/03 00:21:35 ad Exp $ */
/*
*
@ -161,6 +161,7 @@ struct pmap {
#endif /* !defined(__x86_64__) */
int pm_flags; /* see below */
bool pm_noflush; /* exec/exit in progress */
union descriptor *pm_ldt; /* user-set LDT */
int pm_ldt_len; /* number of LDT entries */
int pm_ldt_sel; /* LDT selector */
@ -224,6 +225,7 @@ bool pmap_test_attrs(struct vm_page *, unsigned);
void pmap_write_protect(struct pmap *, vaddr_t, vaddr_t, vm_prot_t);
void pmap_load(void);
paddr_t pmap_init_tmp_pgtbl(paddr_t);
void pmap_remove_all(struct pmap *);
vaddr_t reserve_dumppages(vaddr_t); /* XXX: not a pmap fn */
@ -242,13 +244,6 @@ bool pmap_pageidlezero(paddr_t);
* inline functions
*/
/*ARGSUSED*/
static __inline void
pmap_remove_all(struct pmap *pmap)
{
/* Nothing. */
}
/*
* pmap_update_pg: flush one page from the TLB (or flush the whole thing
* if hardware doesn't support one-page flushing)

28
sys/arch/x86/x86/pmap.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: pmap.c,v 1.57 2008/05/02 15:26:39 ad Exp $ */
/* $NetBSD: pmap.c,v 1.58 2008/05/03 00:21:35 ad Exp $ */
/*
* Copyright (c) 2007 Manuel Bouyer.
@ -154,7 +154,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.57 2008/05/02 15:26:39 ad Exp $");
__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.58 2008/05/03 00:21:35 ad Exp $");
#include "opt_user_ldt.h"
#include "opt_lockdebug.h"
@ -2175,6 +2175,7 @@ pmap_create(void)
pmap->pm_flags = 0;
pmap->pm_cpus = 0;
pmap->pm_kernel_cpus = 0;
pmap->pm_noflush = false;
/* init the LDT */
pmap->pm_ldt = NULL;
@ -4431,6 +4432,20 @@ pmap_dump(struct pmap *pmap, vaddr_t sva, vaddr_t eva)
}
#endif
/*
* pmap_remove_all: pmap is being recycled or destroyed (exec or exit).
*
* => called by last LWP in process.
*/
void
pmap_remove_all(struct pmap *pm)
{
/* Don't bother with flush activity until next pmap_update. */
pm->pm_noflush = true;
}
/*
* pmap_tlb_shootdown: invalidate pages on all CPUs using pmap 'pm'
*
@ -4456,6 +4471,10 @@ pmap_tlb_shootdown(struct pmap *pm, vaddr_t sva, vaddr_t eva, pt_entry_t pte)
KASSERT(eva == 0 || eva >= sva);
KASSERT(kpreempt_disabled());
if (pm->pm_noflush) {
return;
}
if (pte & PG_PS)
sva &= PG_LGFRAME;
@ -4635,6 +4654,11 @@ pmap_update(struct pmap *pm)
kpreempt_disable();
pmap_tlb_shootwait();
kpreempt_enable();
if (pm->pm_noflush) {
tlbflush();
pm->pm_noflush = false;
}
}
#if PTP_LEVELS > 4