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linux-sg2042
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Rename "cr3" to "gpgdir" to avoid x86-specific naming. 

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2007-10-22 11:03:34 +10:00
parent df29f43e65
commit ee3db0f2b6
2 changed files with 12 additions and 12 deletions
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6
drivers/lguest/lg.h
View File

@ -30,7 +30,7 @@ struct lguest_dma_info
struct pgdir
{
unsigned long cr3;
unsigned long gpgdir;
pgd_t *pgdir;
};
@ -154,10 +154,10 @@ void copy_gdt_tls(const struct lguest *lg, struct desc_struct *gdt);
int init_guest_pagetable(struct lguest *lg, unsigned long pgtable);
void free_guest_pagetable(struct lguest *lg);
void guest_new_pagetable(struct lguest *lg, unsigned long pgtable);
void guest_set_pmd(struct lguest *lg, unsigned long cr3, u32 i);
void guest_set_pmd(struct lguest *lg, unsigned long gpgdir, u32 i);
void guest_pagetable_clear_all(struct lguest *lg);
void guest_pagetable_flush_user(struct lguest *lg);
void guest_set_pte(struct lguest *lg, unsigned long cr3,
void guest_set_pte(struct lguest *lg, unsigned long gpgdir,
unsigned long vaddr, pte_t val);
void map_switcher_in_guest(struct lguest *lg, struct lguest_pages *pages);
int demand_page(struct lguest *info, unsigned long cr2, int errcode);

18
drivers/lguest/page_tables.c
View File

@ -96,7 +96,7 @@ static pte_t *spte_addr(struct lguest *lg, pgd_t spgd, unsigned long vaddr)
static unsigned long gpgd_addr(struct lguest *lg, unsigned long vaddr)
{
unsigned int index = vaddr >> (PGDIR_SHIFT);
return lg->pgdirs[lg->pgdidx].cr3 + index * sizeof(pgd_t);
return lg->pgdirs[lg->pgdidx].gpgdir + index * sizeof(pgd_t);
}
static unsigned long gpte_addr(struct lguest *lg,
@ -365,7 +365,7 @@ static unsigned int find_pgdir(struct lguest *lg, unsigned long pgtable)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(lg->pgdirs); i++)
if (lg->pgdirs[i].cr3 == pgtable)
if (lg->pgdirs[i].gpgdir == pgtable)
break;
return i;
}
@ -374,7 +374,7 @@ static unsigned int find_pgdir(struct lguest *lg, unsigned long pgtable)
* allocate a new one (and so the kernel parts are not there), we set
* blank_pgdir. */
static unsigned int new_pgdir(struct lguest *lg,
unsigned long cr3,
unsigned long gpgdir,
int *blank_pgdir)
{
unsigned int next;
@ -394,7 +394,7 @@ static unsigned int new_pgdir(struct lguest *lg,
*blank_pgdir = 1;
}
/* Record which Guest toplevel this shadows. */
lg->pgdirs[next].cr3 = cr3;
lg->pgdirs[next].gpgdir = gpgdir;
/* Release all the non-kernel mappings. */
flush_user_mappings(lg, next);
@ -496,7 +496,7 @@ static void do_set_pte(struct lguest *lg, int idx,
* The benefit is that when we have to track a new page table, we can copy keep
* all the kernel mappings. This speeds up context switch immensely. */
void guest_set_pte(struct lguest *lg,
unsigned long cr3, unsigned long vaddr, pte_t gpte)
unsigned long gpgdir, unsigned long vaddr, pte_t gpte)
{
/* Kernel mappings must be changed on all top levels. Slow, but
* doesn't happen often. */
@ -507,7 +507,7 @@ void guest_set_pte(struct lguest *lg,
do_set_pte(lg, i, vaddr, gpte);
} else {
/* Is this page table one we have a shadow for? */
int pgdir = find_pgdir(lg, cr3);
int pgdir = find_pgdir(lg, gpgdir);
if (pgdir != ARRAY_SIZE(lg->pgdirs))
/* If so, do the update. */
do_set_pte(lg, pgdir, vaddr, gpte);
@ -528,7 +528,7 @@ void guest_set_pte(struct lguest *lg,
*
* So with that in mind here's our code to to update a (top-level) PGD entry:
*/
void guest_set_pmd(struct lguest *lg, unsigned long cr3, u32 idx)
void guest_set_pmd(struct lguest *lg, unsigned long gpgdir, u32 idx)
{
int pgdir;
@ -538,7 +538,7 @@ void guest_set_pmd(struct lguest *lg, unsigned long cr3, u32 idx)
return;
/* If they're talking about a page table we have a shadow for... */
pgdir = find_pgdir(lg, cr3);
pgdir = find_pgdir(lg, gpgdir);
if (pgdir < ARRAY_SIZE(lg->pgdirs))
/* ... throw it away. */
release_pgd(lg, lg->pgdirs[pgdir].pgdir + idx);
@ -558,7 +558,7 @@ int init_guest_pagetable(struct lguest *lg, unsigned long pgtable)
/* We start on the first shadow page table, and give it a blank PGD
* page. */
lg->pgdidx = 0;
lg->pgdirs[lg->pgdidx].cr3 = pgtable;
lg->pgdirs[lg->pgdidx].gpgdir = pgtable;
lg->pgdirs[lg->pgdidx].pgdir = (pgd_t*)get_zeroed_page(GFP_KERNEL);
if (!lg->pgdirs[lg->pgdidx].pgdir)
return -ENOMEM;