OpenCloudOS-Kernel/arch/s390/include/asm/mmu.h

#ifndef __MMU_H
#define __MMU_H

typedef struct {
	struct list_head crst_list;
	struct list_head pgtable_list;
	unsigned long asce_bits;
	unsigned long asce_limit;
	int noexec;
	int has_pgste;	 /* The mmu context has extended page tables */
	int alloc_pgste; /* cloned contexts will have extended page tables */
} mm_context_t;

#endif
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! 2005-04-17 06:20:36 +08:00			`#ifndef __MMU_H`
			`#define __MMU_H`

[S390] 1K/2K page table pages. This patch implements 1K/2K page table pages for s390. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> 2008-02-10 01:24:35 +08:00			`typedef struct {`
			`struct list_head crst_list;`
			`struct list_head pgtable_list;`
			`unsigned long asce_bits;`
[S390] dynamic page tables. Add support for different number of page table levels dependent on the highest address used for a process. This will cause a 31 bit process to use a two level page table instead of the four level page table that is the default after the pud has been introduced. Likewise a normal 64 bit process will use three levels instead of four. Only if a process runs out of the 4 tera bytes which can be addressed with a three level page table the fourth level is dynamically added. Then the process can use up to 8 peta byte. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> 2008-02-10 01:24:37 +08:00			`unsigned long asce_limit;`
[S390] 1K/2K page table pages. This patch implements 1K/2K page table pages for s390. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> 2008-02-10 01:24:35 +08:00			`int noexec;`
[S390] pgtables: Fix race in enable_sie vs. page table ops The current enable_sie code sets the mm->context.pgstes bit to tell dup_mm that the new mm should have extended page tables. This bit is also used by the s390 specific page table primitives to decide about the page table layout - which means context.pgstes has two meanings. This can cause any kind of bugs. For example - e.g. shrink_zone can call ptep_clear_flush_young while enable_sie is running. ptep_clear_flush_young will test for context.pgstes. Since enable_sie changed that value of the old struct mm without changing the page table layout ptep_clear_flush_young will do the wrong thing. The solution is to split pgstes into two bits - one for the allocation - one for the current state Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> 2008-10-28 18:10:15 +08:00			`int has_pgste; /* The mmu context has extended page tables */`
			`int alloc_pgste; /* cloned contexts will have extended page tables */`
[S390] 1K/2K page table pages. This patch implements 1K/2K page table pages for s390. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> 2008-02-10 01:24:35 +08:00			`} mm_context_t;`
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! 2005-04-17 06:20:36 +08:00
			`#endif`