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Commit b86206e4 authored by Anton Blanchard's avatar Anton Blanchard
Browse files

powerpc: Fix branch patching code for ABIv2 



The MMU hashtable and SLB branch patching code uses function
pointers for the update sites. This creates a difference between
ABIv1 and ABIv2 because we don't have function descriptors on
ABIv2.

Get rid of the function pointer and just point at the update
sites directly. This works on both ABIs.

Signed-off-by: default avatarAnton Blanchard <anton@samba.org>
parent 26f92060

arch/powerpc/mm/hash_low_64.S

+24 −12
Original line number Diff line number Diff line
@@ -201,7 +201,8 @@ htab_insert_pte: 
	li	r8,MMU_PAGE_4K		/* page size */

	li	r9,MMU_PAGE_4K		/* actual page size */

	ld	r10,STK_PARAM(R9)(r1)	/* segment size */

_GLOBAL(htab_call_hpte_insert1)

.globl htab_call_hpte_insert1

htab_call_hpte_insert1:

	bl	.			/* Patched by htab_finish_init() */

	cmpdi	0,r3,0

	bge	htab_pte_insert_ok	/* Insertion successful */
@@ -225,7 +226,8 @@ _GLOBAL(htab_call_hpte_insert1) 
	li	r8,MMU_PAGE_4K		/* page size */

	li	r9,MMU_PAGE_4K		/* actual page size */

	ld	r10,STK_PARAM(R9)(r1)	/* segment size */

_GLOBAL(htab_call_hpte_insert2)

.globl htab_call_hpte_insert2

htab_call_hpte_insert2:

	bl	.			/* Patched by htab_finish_init() */

	cmpdi	0,r3,0

	bge+	htab_pte_insert_ok	/* Insertion successful */
@@ -242,7 +244,8 @@ _GLOBAL(htab_call_hpte_insert2) 
2:	and	r0,r5,r27

	rldicr	r3,r0,3,63-3	/* r0 = (hash & mask) << 3 */	

	/* Call ppc_md.hpte_remove */

_GLOBAL(htab_call_hpte_remove)

.globl htab_call_hpte_remove

htab_call_hpte_remove:

	bl	.			/* Patched by htab_finish_init() */



	/* Try all again */
@@ -296,7 +299,8 @@ htab_modify_pte: 
	li	r7,MMU_PAGE_4K		/* actual page size */

	ld	r8,STK_PARAM(R9)(r1)	/* segment size */

	ld	r9,STK_PARAM(R8)(r1)	/* get "local" param */

_GLOBAL(htab_call_hpte_updatepp)

.globl htab_call_hpte_updatepp

htab_call_hpte_updatepp:

	bl	.			/* Patched by htab_finish_init() */



	/* if we failed because typically the HPTE wasn't really here
@@ -526,7 +530,8 @@ htab_special_pfn: 
	li	r8,MMU_PAGE_4K		/* page size */

	li	r9,MMU_PAGE_4K		/* actual page size */

	ld	r10,STK_PARAM(R9)(r1)	/* segment size */

_GLOBAL(htab_call_hpte_insert1)

.globl htab_call_hpte_insert1

htab_call_hpte_insert1:

	bl	.			/* patched by htab_finish_init() */

	cmpdi	0,r3,0

	bge	htab_pte_insert_ok	/* Insertion successful */
@@ -554,7 +559,8 @@ _GLOBAL(htab_call_hpte_insert1) 
	li	r8,MMU_PAGE_4K		/* page size */

	li	r9,MMU_PAGE_4K		/* actual page size */

	ld	r10,STK_PARAM(R9)(r1)	/* segment size */

_GLOBAL(htab_call_hpte_insert2)

.globl htab_call_hpte_insert2

htab_call_hpte_insert2:

	bl	.			/* patched by htab_finish_init() */

	cmpdi	0,r3,0

	bge+	htab_pte_insert_ok	/* Insertion successful */
@@ -571,7 +577,8 @@ _GLOBAL(htab_call_hpte_insert2) 
2:	and	r0,r5,r27

	rldicr	r3,r0,3,63-3		/* r0 = (hash & mask) << 3 */

	/* Call ppc_md.hpte_remove */

_GLOBAL(htab_call_hpte_remove)

.globl htab_call_hpte_remove

htab_call_hpte_remove:

	bl	.			/* patched by htab_finish_init() */



	/* Try all again */
@@ -660,7 +667,8 @@ htab_modify_pte: 
	li	r7,MMU_PAGE_4K		/* actual page size */

	ld	r8,STK_PARAM(R9)(r1)	/* segment size */

	ld	r9,STK_PARAM(R8)(r1)	/* get "local" param */

_GLOBAL(htab_call_hpte_updatepp)

.globl htab_call_hpte_updatepp

htab_call_hpte_updatepp:

	bl	.			/* patched by htab_finish_init() */



	/* if we failed because typically the HPTE wasn't really here
@@ -857,7 +865,8 @@ ht64_insert_pte: 
	li	r8,MMU_PAGE_64K

	li	r9,MMU_PAGE_64K		/* actual page size */

	ld	r10,STK_PARAM(R9)(r1)	/* segment size */

_GLOBAL(ht64_call_hpte_insert1)

.globl ht64_call_hpte_insert1

ht64_call_hpte_insert1:

	bl	.			/* patched by htab_finish_init() */

	cmpdi	0,r3,0

	bge	ht64_pte_insert_ok	/* Insertion successful */
@@ -881,7 +890,8 @@ _GLOBAL(ht64_call_hpte_insert1) 
	li	r8,MMU_PAGE_64K

	li	r9,MMU_PAGE_64K		/* actual page size */

	ld	r10,STK_PARAM(R9)(r1)	/* segment size */

_GLOBAL(ht64_call_hpte_insert2)

.globl ht64_call_hpte_insert2

ht64_call_hpte_insert2:

	bl	.			/* patched by htab_finish_init() */

	cmpdi	0,r3,0

	bge+	ht64_pte_insert_ok	/* Insertion successful */
@@ -898,7 +908,8 @@ _GLOBAL(ht64_call_hpte_insert2) 
2:	and	r0,r5,r27

	rldicr	r3,r0,3,63-3	/* r0 = (hash & mask) << 3 */

	/* Call ppc_md.hpte_remove */

_GLOBAL(ht64_call_hpte_remove)

.globl ht64_call_hpte_remove

ht64_call_hpte_remove:

	bl	.			/* patched by htab_finish_init() */



	/* Try all again */
@@ -952,7 +963,8 @@ ht64_modify_pte: 
	li	r7,MMU_PAGE_64K		/* actual page size */

	ld	r8,STK_PARAM(R9)(r1)	/* segment size */

	ld	r9,STK_PARAM(R8)(r1)	/* get "local" param */

_GLOBAL(ht64_call_hpte_updatepp)

.globl ht64_call_hpte_updatepp

ht64_call_hpte_updatepp:

	bl	.			/* patched by htab_finish_init() */



	/* if we failed because typically the HPTE wasn't really here

arch/powerpc/mm/hash_utils_64.c

+9 −11
Original line number Diff line number Diff line
@@ -603,19 +603,18 @@ int remove_section_mapping(unsigned long start, unsigned long end) 
}

#endif /* CONFIG_MEMORY_HOTPLUG */



extern u32 htab_call_hpte_insert1[];

extern u32 htab_call_hpte_insert2[];

extern u32 htab_call_hpte_remove[];

extern u32 htab_call_hpte_updatepp[];

extern u32 ht64_call_hpte_insert1[];

extern u32 ht64_call_hpte_insert2[];

extern u32 ht64_call_hpte_remove[];

extern u32 ht64_call_hpte_updatepp[];



static void __init htab_finish_init(void)

{

	extern unsigned int *htab_call_hpte_insert1;

	extern unsigned int *htab_call_hpte_insert2;

	extern unsigned int *htab_call_hpte_remove;

	extern unsigned int *htab_call_hpte_updatepp;



#ifdef CONFIG_PPC_HAS_HASH_64K

	extern unsigned int *ht64_call_hpte_insert1;

	extern unsigned int *ht64_call_hpte_insert2;

	extern unsigned int *ht64_call_hpte_remove;

	extern unsigned int *ht64_call_hpte_updatepp;



	patch_branch(ht64_call_hpte_insert1,

		ppc_function_entry(ppc_md.hpte_insert),

		BRANCH_SET_LINK);
@@ -628,7 +627,6 @@ static void __init htab_finish_init(void) 
	patch_branch(ht64_call_hpte_updatepp,

		ppc_function_entry(ppc_md.hpte_updatepp),

		BRANCH_SET_LINK);



#endif /* CONFIG_PPC_HAS_HASH_64K */



	patch_branch(htab_call_hpte_insert1,

arch/powerpc/mm/slb.c

+6 −6
Original line number Diff line number Diff line
@@ -256,10 +256,14 @@ static inline void patch_slb_encoding(unsigned int *insn_addr, 
	patch_instruction(insn_addr, insn);

}



extern u32 slb_compare_rr_to_size[];

extern u32 slb_miss_kernel_load_linear[];

extern u32 slb_miss_kernel_load_io[];

extern u32 slb_compare_rr_to_size[];

extern u32 slb_miss_kernel_load_vmemmap[];



void slb_set_size(u16 size)

{

	extern unsigned int *slb_compare_rr_to_size;



	if (mmu_slb_size == size)

		return;
@@ -272,11 +276,7 @@ void slb_initialize(void) 
	unsigned long linear_llp, vmalloc_llp, io_llp;

	unsigned long lflags, vflags;

	static int slb_encoding_inited;

	extern unsigned int *slb_miss_kernel_load_linear;

	extern unsigned int *slb_miss_kernel_load_io;

	extern unsigned int *slb_compare_rr_to_size;

#ifdef CONFIG_SPARSEMEM_VMEMMAP

	extern unsigned int *slb_miss_kernel_load_vmemmap;

	unsigned long vmemmap_llp;

#endif

arch/powerpc/mm/slb_low.S

+8 −4
Original line number Diff line number Diff line
@@ -59,7 +59,8 @@ _GLOBAL(slb_allocate_realmode) 
	/* Linear mapping encoding bits, the "li" instruction below will

	 * be patched by the kernel at boot

	 */

_GLOBAL(slb_miss_kernel_load_linear)

.globl slb_miss_kernel_load_linear

slb_miss_kernel_load_linear:

	li	r11,0

	/*

	 * context = (MAX_USER_CONTEXT) + ((ea >> 60) - 0xc) + 1
@@ -79,7 +80,8 @@ END_MMU_FTR_SECTION_IFCLR(MMU_FTR_1T_SEGMENT) 
	/* Check virtual memmap region. To be patches at kernel boot */

	cmpldi	cr0,r9,0xf

	bne	1f

_GLOBAL(slb_miss_kernel_load_vmemmap)

.globl slb_miss_kernel_load_vmemmap

slb_miss_kernel_load_vmemmap:

	li	r11,0

	b	6f

1:
@@ -95,7 +97,8 @@ _GLOBAL(slb_miss_kernel_load_vmemmap) 
	b	6f

5:

	/* IO mapping */

	_GLOBAL(slb_miss_kernel_load_io)

.globl slb_miss_kernel_load_io

slb_miss_kernel_load_io:

	li	r11,0

6:

	/*
@@ -250,7 +253,8 @@ slb_finish_load: 
7:	ld	r10,PACASTABRR(r13)

	addi	r10,r10,1

	/* This gets soft patched on boot. */

_GLOBAL(slb_compare_rr_to_size)

.globl slb_compare_rr_to_size

slb_compare_rr_to_size:

	cmpldi	r10,0



	blt+	4f