diff options
Diffstat (limited to 'arch/i386/kernel/vmi.c')
| -rw-r--r-- | arch/i386/kernel/vmi.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/arch/i386/kernel/vmi.c b/arch/i386/kernel/vmi.c index acdfe69fb7ad..bd1037bd124b 100644 --- a/arch/i386/kernel/vmi.c +++ b/arch/i386/kernel/vmi.c @@ -370,6 +370,24 @@ static void vmi_check_page_type(u32 pfn, int type) #define vmi_check_page_type(p,t) do { } while (0) #endif +static void vmi_map_pt_hook(int type, pte_t *va, u32 pfn) +{ + /* + * Internally, the VMI ROM must map virtual addresses to physical + * addresses for processing MMU updates. By the time MMU updates + * are issued, this information is typically already lost. + * Fortunately, the VMI provides a cache of mapping slots for active + * page tables. + * + * We use slot zero for the linear mapping of physical memory, and + * in HIGHPTE kernels, slot 1 and 2 for KM_PTE0 and KM_PTE1. + * + * args: SLOT VA COUNT PFN + */ + BUG_ON(type != KM_PTE0 && type != KM_PTE1); + vmi_ops.set_linear_mapping((type - KM_PTE0)+1, (u32)va, 1, pfn); +} + static void vmi_allocate_pt(u32 pfn) { vmi_set_page_type(pfn, VMI_PAGE_L1); @@ -813,6 +831,7 @@ static inline int __init activate_vmi(void) vmi_ops.allocate_page = vmi_get_function(VMI_CALL_AllocatePage); vmi_ops.release_page = vmi_get_function(VMI_CALL_ReleasePage); + paravirt_ops.map_pt_hook = vmi_map_pt_hook; paravirt_ops.alloc_pt = vmi_allocate_pt; paravirt_ops.alloc_pd = vmi_allocate_pd; paravirt_ops.alloc_pd_clone = vmi_allocate_pd_clone; |