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authorBrian King <brking@linux.vnet.ibm.com>2008-08-16 05:09:33 +1000
committerPaul Mackerras <paulus@samba.org>2008-08-18 14:22:35 +1000
commit370e4587d0a6bf80a0c421583fe579a13f3d8773 (patch)
treef56502407decd8e833b6e7cb50b51b3d51ce6150 /arch/powerpc
parent81f14997e8e8a10eb75ca593674d2b0c94129a21 (diff)
downloadop-kernel-dev-370e4587d0a6bf80a0c421583fe579a13f3d8773.zip
op-kernel-dev-370e4587d0a6bf80a0c421583fe579a13f3d8773.tar.gz
powerpc: Fix CMM page loaning on 64k page kernel with 4k hardware pages
If the firmware page size used for collaborative memory overcommit is 4k, but the kernel is using 64k pages, the page loaning is currently broken as it only marks the first 4k page of each 64k page as loaned. This fixes this to iterate through each 4k page and mark them all as loaned/active. Signed-off-by: Brian King <brking@linux.vnet.ibm.com> Signed-off-by: Robert Jennings <rcj@linux.vnet.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/platforms/pseries/plpar_wrappers.h27
1 files changed, 25 insertions, 2 deletions
diff --git a/arch/powerpc/platforms/pseries/plpar_wrappers.h b/arch/powerpc/platforms/pseries/plpar_wrappers.h
index a437267..d967c18 100644
--- a/arch/powerpc/platforms/pseries/plpar_wrappers.h
+++ b/arch/powerpc/platforms/pseries/plpar_wrappers.h
@@ -2,6 +2,7 @@
#define _PSERIES_PLPAR_WRAPPERS_H
#include <asm/hvcall.h>
+#include <asm/page.h>
static inline long poll_pending(void)
{
@@ -44,12 +45,34 @@ static inline long register_slb_shadow(unsigned long cpu, unsigned long vpa)
static inline long plpar_page_set_loaned(unsigned long vpa)
{
- return plpar_hcall_norets(H_PAGE_INIT, H_PAGE_SET_LOANED, vpa, 0);
+ unsigned long cmo_page_sz = cmo_get_page_size();
+ long rc = 0;
+ int i;
+
+ for (i = 0; !rc && i < PAGE_SIZE; i += cmo_page_sz)
+ rc = plpar_hcall_norets(H_PAGE_INIT, H_PAGE_SET_LOANED, vpa + i, 0);
+
+ for (i -= cmo_page_sz; rc && i != 0; i -= cmo_page_sz)
+ plpar_hcall_norets(H_PAGE_INIT, H_PAGE_SET_ACTIVE,
+ vpa + i - cmo_page_sz, 0);
+
+ return rc;
}
static inline long plpar_page_set_active(unsigned long vpa)
{
- return plpar_hcall_norets(H_PAGE_INIT, H_PAGE_SET_ACTIVE, vpa, 0);
+ unsigned long cmo_page_sz = cmo_get_page_size();
+ long rc = 0;
+ int i;
+
+ for (i = 0; !rc && i < PAGE_SIZE; i += cmo_page_sz)
+ rc = plpar_hcall_norets(H_PAGE_INIT, H_PAGE_SET_ACTIVE, vpa + i, 0);
+
+ for (i -= cmo_page_sz; rc && i != 0; i -= cmo_page_sz)
+ plpar_hcall_norets(H_PAGE_INIT, H_PAGE_SET_LOANED,
+ vpa + i - cmo_page_sz, 0);
+
+ return rc;
}
extern void vpa_init(int cpu);
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