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Diffstat (limited to 'drivers/lguest/x86/core.c')
-rw-r--r--drivers/lguest/x86/core.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/lguest/x86/core.c b/drivers/lguest/x86/core.c
index a6b717644be0..1a83910f674f 100644
--- a/drivers/lguest/x86/core.c
+++ b/drivers/lguest/x86/core.c
@@ -324,6 +324,11 @@ static void rewrite_hypercall(struct lg_cpu *cpu)
u8 insn[3] = {0xcd, 0x1f, 0x90};
__lgwrite(cpu, guest_pa(cpu, cpu->regs->eip), insn, sizeof(insn));
+ /* The above write might have caused a copy of that page to be made
+ * (if it was read-only). We need to make sure the Guest has
+ * up-to-date pagetables. As this doesn't happen often, we can just
+ * drop them all. */
+ guest_pagetable_clear_all(cpu);
}
static bool is_hypercall(struct lg_cpu *cpu)
@@ -563,8 +568,8 @@ void __exit lguest_arch_host_fini(void)
int lguest_arch_do_hcall(struct lg_cpu *cpu, struct hcall_args *args)
{
switch (args->arg0) {
- case LHCALL_LOAD_GDT:
- load_guest_gdt(cpu, args->arg1, args->arg2);
+ case LHCALL_LOAD_GDT_ENTRY:
+ load_guest_gdt_entry(cpu, args->arg1, args->arg2, args->arg3);
break;
case LHCALL_LOAD_IDT_ENTRY:
load_guest_idt_entry(cpu, args->arg1, args->arg2, args->arg3);