lguest: makes special fields be per-vcpu

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>

1 files changed, 9 insertions, 8 deletions

diff --git a/drivers/lguest/lg.h b/drivers/lguest/lg.h
index e7123fa6127..05637648a17 100644
--- a/drivers/lguest/lg.h
+++ b/drivers/lguest/lg.h
@@ -46,6 +46,11 @@ struct lg_cpu {
         struct task_struct *tsk;
         struct mm_struct *mm;   /* == tsk->mm, but that becomes NULL on exit */
 
+        u32 cr2;
+        int ts;
+        u32 esp1;
+        u8 ss1;
+
         /* At end of a page shared mapped over lguest_pages in guest.  */
         unsigned long regs_page;
         struct lguest_regs *regs;
@@ -80,10 +85,6 @@ struct lguest
          * memory in the Launcher. */
         void __user *mem_base;
         unsigned long kernel_address;
-        u32 cr2;
-        int ts;
-        u32 esp1;
-        u8 ss1;
 
         /* Bitmap of what has changed: see CHANGED_* above. */
         int changed;
@@ -141,8 +142,8 @@ void maybe_do_interrupt(struct lg_cpu *cpu);
 int deliver_trap(struct lg_cpu *cpu, unsigned int num);
 void load_guest_idt_entry(struct lg_cpu *cpu, unsigned int i,
                           u32 low, u32 hi);
-void guest_set_stack(struct lguest *lg, u32 seg, u32 esp, unsigned int pages);
-void pin_stack_pages(struct lguest *lg);
+void guest_set_stack(struct lg_cpu *cpu, u32 seg, u32 esp, unsigned int pages);
+void pin_stack_pages(struct lg_cpu *cpu);
 void setup_default_idt_entries(struct lguest_ro_state *state,
                                const unsigned long *def);
 void copy_traps(const struct lg_cpu *cpu, struct desc_struct *idt,
@@ -164,9 +165,9 @@ void copy_gdt_tls(const struct lg_cpu *cpu, struct desc_struct *gdt);
 /* page_tables.c: */
 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_new_pagetable(struct lg_cpu *cpu, unsigned long pgtable);
 void guest_set_pmd(struct lguest *lg, unsigned long gpgdir, u32 i);
-void guest_pagetable_clear_all(struct lguest *lg);
+void guest_pagetable_clear_all(struct lg_cpu *cpu);
 void guest_pagetable_flush_user(struct lguest *lg);
 void guest_set_pte(struct lguest *lg, unsigned long gpgdir,
                    unsigned long vaddr, pte_t val);