lguest: PAE support

This version requires that host and guest have the same PAE status.
NX cap is not offered to the guest, yet.

Signed-off-by: Matias Zabaljauregui <zabaljauregui@gmail.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

1 files changed, 10 insertions, 0 deletions

diff --git a/drivers/lguest/hypercalls.c b/drivers/lguest/hypercalls.c
index 51149ca14617..c29ffa19cb74 100644
--- a/drivers/lguest/hypercalls.c
+++ b/drivers/lguest/hypercalls.c
@@ -77,11 +77,21 @@ static void do_hcall(struct lg_cpu *cpu, struct hcall_args *args)
                 guest_set_stack(cpu, args->arg1, args->arg2, args->arg3);
                 break;
         case LHCALL_SET_PTE:
+#ifdef CONFIG_X86_PAE
+                guest_set_pte(cpu, args->arg1, args->arg2,
+                                __pte(args->arg3 | (u64)args->arg4 << 32));
+#else
                 guest_set_pte(cpu, args->arg1, args->arg2, __pte(args->arg3));
+#endif
                 break;
         case LHCALL_SET_PGD:
                 guest_set_pgd(cpu->lg, args->arg1, args->arg2);
                 break;
+#ifdef CONFIG_X86_PAE
+        case LHCALL_SET_PMD:
+                guest_set_pmd(cpu->lg, args->arg1, args->arg2);
+                break;
+#endif
         case LHCALL_SET_CLOCKEVENT:
                 guest_set_clockevent(cpu, args->arg1);
                 break;