Commit ccf01516 authored by James Hogan's avatar James Hogan
Browse files

MIPS: Export pgd/pmd symbols for KVM 



Export pmd_init(), invalid_pmd_table and tlbmiss_handler_setup_pgd to
GPL kernel modules so that MIPS KVM can use the inline page table
management functions and switch between page tables:

- pmd_init() will be used directly by KVM to initialise newly allocated
  pmd tables with invalid lower level table pointers.

- invalid_pmd_table is used by pud_present(), pud_none(), and
  pud_clear(), which KVM will use to test and clear pud entries.

- tlbmiss_handler_setup_pgd() will be called by KVM entry code to switch
  to the appropriate GVA page tables.

Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
Acked-by: default avatarRalf Baechle <ralf@linux-mips.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Radim Krčmář" <rkrcmar@redhat.com>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
parent 814f91bf

arch/mips/mm/init.c

+1 −0
Original line number Original line Diff line number Diff line
@@ -538,5 +538,6 @@ unsigned long pgd_current[NR_CPUS]; 
pgd_t swapper_pg_dir[_PTRS_PER_PGD] __section(.bss..swapper_pg_dir);

pgd_t swapper_pg_dir[_PTRS_PER_PGD] __section(.bss..swapper_pg_dir);

#ifndef __PAGETABLE_PMD_FOLDED

#ifndef __PAGETABLE_PMD_FOLDED

pmd_t invalid_pmd_table[PTRS_PER_PMD] __page_aligned_bss;

pmd_t invalid_pmd_table[PTRS_PER_PMD] __page_aligned_bss;

EXPORT_SYMBOL_GPL(invalid_pmd_table);

#endif

#endif

pte_t invalid_pte_table[PTRS_PER_PTE] __page_aligned_bss;
 
pte_t invalid_pte_table[PTRS_PER_PTE] __page_aligned_bss;

arch/mips/mm/pgtable-64.c

+2 −0
Original line number Original line Diff line number Diff line
@@ -6,6 +6,7 @@ 
 * Copyright (C) 1999, 2000 by Silicon Graphics

 * Copyright (C) 1999, 2000 by Silicon Graphics

 * Copyright (C) 2003 by Ralf Baechle

 * Copyright (C) 2003 by Ralf Baechle

 */

 */

#include <linux/export.h>

#include <linux/init.h>

#include <linux/init.h>

#include <linux/mm.h>

#include <linux/mm.h>

#include <asm/fixmap.h>

#include <asm/fixmap.h>
@@ -60,6 +61,7 @@ void pmd_init(unsigned long addr, unsigned long pagetable) 
		p[-1] = pagetable;

		p[-1] = pagetable;

	} while (p != end);

	} while (p != end);

}

}

EXPORT_SYMBOL_GPL(pmd_init);

#endif

#endif





pmd_t mk_pmd(struct page *page, pgprot_t prot)

pmd_t mk_pmd(struct page *page, pgprot_t prot)

arch/mips/mm/tlbex.c

+4 −1
Original line number Original line Diff line number Diff line
@@ -22,6 +22,7 @@ 
 */

 */





#include <linux/bug.h>

#include <linux/bug.h>

#include <linux/export.h>

#include <linux/kernel.h>

#include <linux/kernel.h>

#include <linux/types.h>

#include <linux/types.h>

#include <linux/smp.h>

#include <linux/smp.h>
@@ -1536,7 +1537,9 @@ static void build_loongson3_tlb_refill_handler(void) 
extern u32 handle_tlbl[], handle_tlbl_end[];

extern u32 handle_tlbl[], handle_tlbl_end[];

extern u32 handle_tlbs[], handle_tlbs_end[];

extern u32 handle_tlbs[], handle_tlbs_end[];

extern u32 handle_tlbm[], handle_tlbm_end[];

extern u32 handle_tlbm[], handle_tlbm_end[];

extern u32 tlbmiss_handler_setup_pgd_start[], tlbmiss_handler_setup_pgd[];

extern u32 tlbmiss_handler_setup_pgd_start[];

extern u32 tlbmiss_handler_setup_pgd[];

EXPORT_SYMBOL_GPL(tlbmiss_handler_setup_pgd);

extern u32 tlbmiss_handler_setup_pgd_end[];

extern u32 tlbmiss_handler_setup_pgd_end[];





static void build_setup_pgd(void)

static void build_setup_pgd(void)

CRA Git | Maintained and supported by SUSTech CRA and CCSE