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>
diff --git a/arch/tile/include/asm/pgtable.h b/arch/tile/include/asm/pgtable.h
index ec907d4..319f482 100644
--- a/arch/tile/include/asm/pgtable.h
+++ b/arch/tile/include/asm/pgtable.h
@@ -27,8 +27,10 @@
#include <linux/slab.h>
#include <linux/list.h>
#include <linux/spinlock.h>
+#include <linux/pfn.h>
#include <asm/processor.h>
#include <asm/fixmap.h>
+#include <asm/page.h>
struct mm_struct;
struct vm_area_struct;
@@ -162,7 +164,7 @@
(pgprot_t) { ((oldprot).val & ~_PAGE_ALL) | (newprot).val }
/* Just setting the PFN to zero suffices. */
-#define pte_pgprot(x) hv_pte_set_pfn((x), 0)
+#define pte_pgprot(x) hv_pte_set_pa((x), 0)
/*
* For PTEs and PDEs, we must clear the Present bit first when
@@ -262,7 +264,7 @@
static inline unsigned long pte_pfn(pte_t pte)
{
- return hv_pte_get_pfn(pte);
+ return PFN_DOWN(hv_pte_get_pa(pte));
}
/* Set or get the remote cache cpu in a pgprot with remote caching. */
@@ -271,7 +273,7 @@
static inline pte_t pfn_pte(unsigned long pfn, pgprot_t prot)
{
- return hv_pte_set_pfn(prot, pfn);
+ return hv_pte_set_pa(prot, PFN_PHYS(pfn));
}
/* Support for priority mappings. */
@@ -471,7 +473,7 @@
* OK for pte_lockptr(), since we just end up with potentially one
* lock being used for several pte_t arrays.
*/
-#define pmd_page(pmd) pfn_to_page(HV_PTFN_TO_PFN(pmd_ptfn(pmd)))
+#define pmd_page(pmd) pfn_to_page(PFN_DOWN(HV_PTFN_TO_CPA(pmd_ptfn(pmd))))
static inline void pmd_clear(pmd_t *pmdp)
{