arch/tile: don't set the homecache of a PTE unless appropriate
We make sure not to try to set the home for an MMIO PTE (on tilegx) or a PTE that isn't referencing memory managed by Linux. Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
This commit is contained in:
parent
48292738d0
commit
12400f1f22
|
@ -469,10 +469,18 @@ void __set_pte(pte_t *ptep, pte_t pte)
|
|||
|
||||
void set_pte(pte_t *ptep, pte_t pte)
|
||||
{
|
||||
struct page *page = pfn_to_page(pte_pfn(pte));
|
||||
|
||||
/* Update the home of a PTE if necessary */
|
||||
pte = pte_set_home(pte, page_home(page));
|
||||
if (pte_present(pte) &&
|
||||
(!CHIP_HAS_MMIO() || hv_pte_get_mode(pte) != HV_PTE_MODE_MMIO)) {
|
||||
/* The PTE actually references physical memory. */
|
||||
unsigned long pfn = pte_pfn(pte);
|
||||
if (pfn_valid(pfn)) {
|
||||
/* Update the home of the PTE from the struct page. */
|
||||
pte = pte_set_home(pte, page_home(pfn_to_page(pfn)));
|
||||
} else if (hv_pte_get_mode(pte) == 0) {
|
||||
/* remap_pfn_range(), etc, must supply PTE mode. */
|
||||
panic("set_pte(): out-of-range PFN and mode 0\n");
|
||||
}
|
||||
}
|
||||
|
||||
__set_pte(ptep, pte);
|
||||
}
|
||||
|
|
Loading…
Reference in a new issue