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authorGlauber de Oliveira Costa <gcosta@redhat.com>2008-01-07 11:05:30 -0200
committerRusty Russell <rusty@rustcorp.com.au>2008-01-30 22:50:09 +1100
commit0c78441cf4dd66f66e23dc085f0cc1e3e8669b96 (patch)
tree33216420c6300df9a345247dc6e0b669ce5b2198
parent177e449dc5bd4cf8dc48d66abee61ddf34b126b9 (diff)
lguest: map_switcher_in_guest() per-vcpu
The switcher needs to be mapped per-vcpu, because different vcpus will potentially have different page tables (they don't have to, because threads will share the same). So our first step is the make the function receive a vcpu struct Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
-rw-r--r--drivers/lguest/lg.h2
-rw-r--r--drivers/lguest/page_tables.c3
-rw-r--r--drivers/lguest/x86/core.c2
3 files changed, 4 insertions, 3 deletions
diff --git a/drivers/lguest/lg.h b/drivers/lguest/lg.h
index 29e03d588a8..072d0d4fd0b 100644
--- a/drivers/lguest/lg.h
+++ b/drivers/lguest/lg.h
@@ -168,7 +168,7 @@ 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 gpgdir,
unsigned long vaddr, pte_t val);
-void map_switcher_in_guest(struct lguest *lg, struct lguest_pages *pages);
+void map_switcher_in_guest(struct lg_cpu *cpu, struct lguest_pages *pages);
int demand_page(struct lguest *info, unsigned long cr2, int errcode);
void pin_page(struct lguest *lg, unsigned long vaddr);
unsigned long guest_pa(struct lguest *lg, unsigned long vaddr);
diff --git a/drivers/lguest/page_tables.c b/drivers/lguest/page_tables.c
index fffabb32715..17d3329e34c 100644
--- a/drivers/lguest/page_tables.c
+++ b/drivers/lguest/page_tables.c
@@ -634,8 +634,9 @@ void free_guest_pagetable(struct lguest *lg)
* Guest (and not the pages for other CPUs). We have the appropriate PTE pages
* for each CPU already set up, we just need to hook them in now we know which
* Guest is about to run on this CPU. */
-void map_switcher_in_guest(struct lguest *lg, struct lguest_pages *pages)
+void map_switcher_in_guest(struct lg_cpu *cpu, struct lguest_pages *pages)
{
+ struct lguest *lg = cpu->lg;
pte_t *switcher_pte_page = __get_cpu_var(switcher_pte_pages);
pgd_t switcher_pgd;
pte_t regs_pte;
diff --git a/drivers/lguest/x86/core.c b/drivers/lguest/x86/core.c
index 66f48fcc119..d35f6299c92 100644
--- a/drivers/lguest/x86/core.c
+++ b/drivers/lguest/x86/core.c
@@ -91,7 +91,7 @@ static void copy_in_guest_info(struct lg_cpu *cpu, struct lguest_pages *pages)
pages->state.host_cr3 = __pa(current->mm->pgd);
/* Set up the Guest's page tables to see this CPU's pages (and no
* other CPU's pages). */
- map_switcher_in_guest(lg, pages);
+ map_switcher_in_guest(cpu, pages);
/* Set up the two "TSS" members which tell the CPU what stack to use
* for traps which do directly into the Guest (ie. traps at privilege
* level 1). */