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lguest: makes special fields be per-vcpu

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lguest struct have room for some fields, namely, cr2, ts, esp1
and ss1, that are not really guest-wide, but rather, vcpu-wide.

This patch puts it in the vcpu struct

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Glauber de Oliveira Costa
2008-01-07 11:05:35 -02:00
committed by Rusty Russell
parent 66686c2ab0
commit 4665ac8e28
5 changed files with 36 additions and 35 deletions
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11
drivers/lguest/page_tables.c
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@ -432,9 +432,10 @@ static unsigned int new_pgdir(struct lguest *lg,
* Now we've seen all the page table setting and manipulation, let's see what
* what happens when the Guest changes page tables (ie. changes the top-level
* pgdir). This occurs on almost every context switch. */
void guest_new_pagetable(struct lguest *lg, unsigned long pgtable)
void guest_new_pagetable(struct lg_cpu *cpu, unsigned long pgtable)
{
int newpgdir, repin = 0;
struct lguest *lg = cpu->lg;
/* Look to see if we have this one already. */
newpgdir = find_pgdir(lg, pgtable);
@ -446,7 +447,7 @@ void guest_new_pagetable(struct lguest *lg, unsigned long pgtable)
lg->pgdidx = newpgdir;
/* If it was completely blank, we map in the Guest kernel stack */
if (repin)
pin_stack_pages(lg);
pin_stack_pages(cpu);
}
/*H:470 Finally, a routine which throws away everything: all PGD entries in all
@ -468,11 +469,11 @@ static void release_all_pagetables(struct lguest *lg)
* mapping. Since kernel mappings are in every page table, it's easiest to
* throw them all away. This traps the Guest in amber for a while as
* everything faults back in, but it's rare. */
void guest_pagetable_clear_all(struct lguest *lg)
void guest_pagetable_clear_all(struct lg_cpu *cpu)
{
release_all_pagetables(lg);
release_all_pagetables(cpu->lg);
/* We need the Guest kernel stack mapped again. */
pin_stack_pages(lg);
pin_stack_pages(cpu);
}
/*:*/
/*M:009 Since we throw away all mappings when a kernel mapping changes, our