arch/tile: Allow tilegx to build with either 16K or 64K page size

This change introduces new flags for the hv_install_context()
API that passes a page table pointer to the hypervisor.  Clients
can explicitly request 4K, 16K, or 64K small pages when they
install a new context.  In practice, the page size is fixed at
kernel compile time and the same size is always requested every
time a new page table is installed.

The <hv/hypervisor.h> header changes so that it provides more abstract
macros for managing "page" things like PFNs and page tables.  For
example there is now a HV_DEFAULT_PAGE_SIZE_SMALL instead of the old
HV_PAGE_SIZE_SMALL.  The various PFN routines have been eliminated and
only PA- or PTFN-based ones remain (since PTFNs are always expressed
in fixed 2KB "page" size).  The page-table management macros are
renamed with a leading underscore and take page-size arguments with
the presumption that clients will use those macros in some single
place to provide the "real" macros they will use themselves.

I happened to notice the old hv_set_caching() API was totally broken
(it assumed 4KB pages) so I changed it so it would nominally work
correctly with other page sizes.

Tag modules with the page size so you can't load a module built with
a conflicting page size.  (And add a test for SMP while we're at it.)

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>

1 files changed, 4 insertions, 4 deletions

diff --git a/arch/tile/lib/memcpy_tile64.c b/arch/tile/lib/memcpy_tile64.c
index b2fe15e01075..3bc4b4e40d93 100644
--- a/arch/tile/lib/memcpy_tile64.c
+++ b/arch/tile/lib/memcpy_tile64.c
@@ -160,7 +160,7 @@ retry_source:
                         break;
                 if (get_remote_cache_cpu(src_pte) == smp_processor_id())
                         break;
-                src_page = pfn_to_page(hv_pte_get_pfn(src_pte));
+                src_page = pfn_to_page(pte_pfn(src_pte));
                 get_page(src_page);
                 if (pte_val(src_pte) != pte_val(*src_ptep)) {
                         put_page(src_page);
@@ -168,7 +168,7 @@ retry_source:
                 }
                 if (pte_huge(src_pte)) {
                         /* Adjust the PTE to correspond to a small page */
-                        int pfn = hv_pte_get_pfn(src_pte);
+                        int pfn = pte_pfn(src_pte);
                         pfn += (((unsigned long)source & (HPAGE_SIZE-1))
                                 >> PAGE_SHIFT);
                         src_pte = pfn_pte(pfn, src_pte);
@@ -188,7 +188,7 @@ retry_dest:
                         put_page(src_page);
                         break;
                 }
-                dst_page = pfn_to_page(hv_pte_get_pfn(dst_pte));
+                dst_page = pfn_to_page(pte_pfn(dst_pte));
                 if (dst_page == src_page) {
                         /*
                          * Source and dest are on the same page; this
@@ -206,7 +206,7 @@ retry_dest:
                 }
                 if (pte_huge(dst_pte)) {
                         /* Adjust the PTE to correspond to a small page */
-                        int pfn = hv_pte_get_pfn(dst_pte);
+                        int pfn = pte_pfn(dst_pte);
                         pfn += (((unsigned long)dest & (HPAGE_SIZE-1))
                                 >> PAGE_SHIFT);
                         dst_pte = pfn_pte(pfn, dst_pte);