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author | Nitin Gupta <nitin.m.gupta@oracle.com> | 2017-08-11 16:46:50 -0700 |
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committer | David S. Miller <davem@davemloft.net> | 2017-08-15 21:48:07 -0700 |
commit | df7b2155bbe75525531e47c8a67ae4f1dbbae976 (patch) | |
tree | 8a41a2304dc99e7fa024a5debef0ac9197231842 /arch/sparc/include/asm/tsb.h | |
parent | 44382b0195e608732b0bed14d51b5e5f79f46471 (diff) | |
download | linux-df7b2155bbe75525531e47c8a67ae4f1dbbae976.tar.bz2 |
sparc64: Add 16GB hugepage support
Adds support for 16GB hugepage size. To use this page size
use kernel parameters as:
default_hugepagesz=16G hugepagesz=16G hugepages=10
Testing:
Tested with the stream benchmark which allocates 48G of
arrays backed by 16G hugepages and does RW operation on
them in parallel.
Orabug: 25362942
Cc: Anthony Yznaga <anthony.yznaga@oracle.com>
Reviewed-by: Bob Picco <bob.picco@oracle.com>
Signed-off-by: Nitin Gupta <nitin.m.gupta@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/include/asm/tsb.h')
-rw-r--r-- | arch/sparc/include/asm/tsb.h | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/sparc/include/asm/tsb.h b/arch/sparc/include/asm/tsb.h index 32258e08da03..acf55063aa3d 100644 --- a/arch/sparc/include/asm/tsb.h +++ b/arch/sparc/include/asm/tsb.h @@ -195,6 +195,41 @@ extern struct tsb_phys_patch_entry __tsb_phys_patch, __tsb_phys_patch_end; nop; \ 699: + /* PUD has been loaded into REG1, interpret the value, seeing + * if it is a HUGE PUD or a normal one. If it is not valid + * then jump to FAIL_LABEL. If it is a HUGE PUD, and it + * translates to a valid PTE, branch to PTE_LABEL. + * + * We have to propagate bits [32:22] from the virtual address + * to resolve at 4M granularity. + */ +#if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE) +#define USER_PGTABLE_CHECK_PUD_HUGE(VADDR, REG1, REG2, FAIL_LABEL, PTE_LABEL) \ +700: ba 700f; \ + nop; \ + .section .pud_huge_patch, "ax"; \ + .word 700b; \ + nop; \ + .previous; \ + brz,pn REG1, FAIL_LABEL; \ + sethi %uhi(_PAGE_PUD_HUGE), REG2; \ + sllx REG2, 32, REG2; \ + andcc REG1, REG2, %g0; \ + be,pt %xcc, 700f; \ + sethi %hi(0x1ffc0000), REG2; \ + sllx REG2, 1, REG2; \ + brgez,pn REG1, FAIL_LABEL; \ + andn REG1, REG2, REG1; \ + and VADDR, REG2, REG2; \ + brlz,pt REG1, PTE_LABEL; \ + or REG1, REG2, REG1; \ +700: +#else +#define USER_PGTABLE_CHECK_PUD_HUGE(VADDR, REG1, REG2, FAIL_LABEL, PTE_LABEL) \ + brz,pn REG1, FAIL_LABEL; \ + nop; +#endif + /* PMD has been loaded into REG1, interpret the value, seeing * if it is a HUGE PMD or a normal one. If it is not valid * then jump to FAIL_LABEL. If it is a HUGE PMD, and it @@ -242,6 +277,7 @@ extern struct tsb_phys_patch_entry __tsb_phys_patch, __tsb_phys_patch_end; srlx REG2, 64 - PAGE_SHIFT, REG2; \ andn REG2, 0x7, REG2; \ ldxa [REG1 + REG2] ASI_PHYS_USE_EC, REG1; \ + USER_PGTABLE_CHECK_PUD_HUGE(VADDR, REG1, REG2, FAIL_LABEL, 800f) \ brz,pn REG1, FAIL_LABEL; \ sllx VADDR, 64 - (PMD_SHIFT + PMD_BITS), REG2; \ srlx REG2, 64 - PAGE_SHIFT, REG2; \ |