From: Brian King <[EMAIL PROTECTED]>
Newer versions of firmware support page states, which are used by the
collaborative memory manager (future patch) to "loan" pages to the
hypervisor for use by other partitions.
Signed-off-by: Brian King <[EMAIL PROTECTED]>
---
arch/powerpc/platforms/pseries/plpar_wrappers.h | 10 ++++++++++
include/asm-powerpc/hvcall.h | 5 +++++
2 files changed, 15 insertions(+)
Index: b/arch/powerpc/platforms/pseries/plpar_wrappers.h
===================================================================
--- a/arch/powerpc/platforms/pseries/plpar_wrappers.h
+++ b/arch/powerpc/platforms/pseries/plpar_wrappers.h
@@ -42,6 +42,16 @@ static inline long register_slb_shadow(u
return vpa_call(0x3, cpu, vpa);
}
+static inline long plpar_page_set_loaned(unsigned long vpa)
+{
+ return plpar_hcall_norets(H_PAGE_INIT, H_PAGE_SET_LOANED, vpa, 0);
+}
+
+static inline long plpar_page_set_active(unsigned long vpa)
+{
+ return plpar_hcall_norets(H_PAGE_INIT, H_PAGE_SET_ACTIVE, vpa, 0);
+}
+
extern void vpa_init(int cpu);
static inline long plpar_pte_enter(unsigned long flags,
Index: b/include/asm-powerpc/hvcall.h
===================================================================
--- a/include/asm-powerpc/hvcall.h
+++ b/include/asm-powerpc/hvcall.h
@@ -92,6 +92,11 @@
#define H_EXACT (1UL<<(63-24)) /* Use exact PTE or
return H_PTEG_FULL */
#define H_R_XLATE (1UL<<(63-25)) /* include a valid logical page
num in the pte if the valid bit is set */
#define H_READ_4 (1UL<<(63-26)) /* Return 4 PTEs */
+#define H_PAGE_STATE_CHANGE (1UL<<(63-28))
+#define H_PAGE_UNUSED ((1UL<<(63-29)) | (1UL<<(63-30)))
+#define H_PAGE_SET_UNUSED (H_PAGE_STATE_CHANGE | H_PAGE_UNUSED)
+#define H_PAGE_SET_LOANED (H_PAGE_SET_UNUSED | (1UL<<(63-31)))
+#define H_PAGE_SET_ACTIVE H_PAGE_STATE_CHANGE
#define H_AVPN (1UL<<(63-32)) /* An avpn is provided as a
sanity test */
#define H_ANDCOND (1UL<<(63-33))
#define H_ICACHE_INVALIDATE (1UL<<(63-40)) /* icbi, etc. (ignored for IO
pages) */
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