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powerpc/pseries: Utilities to set firmware page state 

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 <brking@linux.vnet.ibm.com>
Signed-off-by: Robert Jennings <rcj@linux.vnet.ibm.com>
Acked-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Brian King 2008-07-24 04:29:16 +10:00 committed by Benjamin Herrenschmidt
parent e46de429cb
commit 86630a3232
2 changed files with 15 additions and 0 deletions
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10
arch/powerpc/platforms/pseries/plpar_wrappers.h
View File

@ -42,6 +42,16 @@ static inline long register_slb_shadow(unsigned long cpu, unsigned long vpa)
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,

5
include/asm-powerpc/hvcall.h
View File

@ -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) */