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authorChris Metcalf <cmetcalf@tilera.com>2012-03-29 21:58:43 +0400
committerChris Metcalf <cmetcalf@tilera.com>2012-05-25 20:48:24 +0400
commitd5d14ed6f2db7287a5088e1350cf422bf72140b3 (patch)
tree19f0bc20bb6f1995a1e4f75dc58e388c047f7d23 /arch/tile/lib
parent47d632f9f8f3ed62b21f725e98b726d65769b6d7 (diff)
downloadlinux-d5d14ed6f2db7287a5088e1350cf422bf72140b3.tar.xz
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>
Diffstat (limited to 'arch/tile/lib')
-rw-r--r--arch/tile/lib/memcpy_tile64.c8
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);