From 53492b1de46a7576170e865062ffcfc93bb5650b Mon Sep 17 00:00:00 2001 From: Gerald Schaefer Date: Wed, 30 Apr 2008 13:38:46 +0200 Subject: [S390] System z large page support. This adds hugetlbfs support on System z, using both hardware large page support if available and software large page emulation on older hardware. Shared (large) page tables are implemented in software emulation mode, by using page->index of the first tail page from a compound large page to store page table information. Signed-off-by: Gerald Schaefer Signed-off-by: Martin Schwidefsky --- include/asm-s390/page.h | 29 +++++++++++++++++++++++------ 1 file changed, 23 insertions(+), 6 deletions(-) (limited to 'include/asm-s390/page.h') diff --git a/include/asm-s390/page.h b/include/asm-s390/page.h index fe7f92b6ae6..b01e6fc9a29 100644 --- a/include/asm-s390/page.h +++ b/include/asm-s390/page.h @@ -19,17 +19,34 @@ #define PAGE_DEFAULT_ACC 0 #define PAGE_DEFAULT_KEY (PAGE_DEFAULT_ACC << 4) +#define HPAGE_SHIFT 20 +#define HPAGE_SIZE (1UL << HPAGE_SHIFT) +#define HPAGE_MASK (~(HPAGE_SIZE - 1)) +#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) + +#define ARCH_HAS_SETCLEAR_HUGE_PTE +#define ARCH_HAS_HUGE_PTE_TYPE +#define ARCH_HAS_PREPARE_HUGEPAGE +#define ARCH_HAS_HUGEPAGE_CLEAR_FLUSH + #include #ifndef __ASSEMBLY__ static inline void clear_page(void *page) { - register unsigned long reg1 asm ("1") = 0; - register void *reg2 asm ("2") = page; - register unsigned long reg3 asm ("3") = 4096; - asm volatile( - " mvcl 2,0" - : "+d" (reg2), "+d" (reg3) : "d" (reg1) : "memory", "cc"); + if (MACHINE_HAS_PFMF) { + asm volatile( + " .insn rre,0xb9af0000,%0,%1" + : : "d" (0x10000), "a" (page) : "memory", "cc"); + } else { + register unsigned long reg1 asm ("1") = 0; + register void *reg2 asm ("2") = page; + register unsigned long reg3 asm ("3") = 4096; + asm volatile( + " mvcl 2,0" + : "+d" (reg2), "+d" (reg3) : "d" (reg1) + : "memory", "cc"); + } } static inline void copy_page(void *to, void *from) -- cgit v1.2.3 From 17f345808563d2f425b2b15d60c4a5b00112e9eb Mon Sep 17 00:00:00 2001 From: Heiko Carstens Date: Wed, 30 Apr 2008 13:38:47 +0200 Subject: [S390] Convert to SPARSEMEM & SPARSEMEM_VMEMMAP Convert s390 to SPARSEMEM and SPARSEMEM_VMEMMAP. We do a select of SPARSEMEM_VMEMMAP since it is configurable. This is because SPARSEMEM without SPARSEMEM_VMEMMAP gives us a hell of broken include dependencies that I don't want to fix. Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky --- include/asm-s390/page.h | 20 -------------------- 1 file changed, 20 deletions(-) (limited to 'include/asm-s390/page.h') diff --git a/include/asm-s390/page.h b/include/asm-s390/page.h index b01e6fc9a29..f0f4579eac1 100644 --- a/include/asm-s390/page.h +++ b/include/asm-s390/page.h @@ -125,26 +125,6 @@ page_get_storage_key(unsigned long addr) return skey; } -extern unsigned long max_pfn; - -static inline int pfn_valid(unsigned long pfn) -{ - unsigned long dummy; - int ccode; - - if (pfn >= max_pfn) - return 0; - - asm volatile( - " lra %0,0(%2)\n" - " ipm %1\n" - " srl %1,28\n" - : "=d" (dummy), "=d" (ccode) - : "a" (pfn << PAGE_SHIFT) - : "cc"); - return !ccode; -} - #endif /* !__ASSEMBLY__ */ /* to align the pointer to the (next) page boundary */ -- cgit v1.2.3