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powerpc/pseries: Utilities to set firmware page state

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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
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@ -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) */