From 85b1da7c47052330af9485a5f5c7e54ede882e65 Mon Sep 17 00:00:00 2001 From: Nitin Gupta Date: Thu, 9 Mar 2017 14:22:23 -0800 Subject: sparc64: Add support for 2G hugepages Signed-off-by: Nitin Gupta Signed-off-by: David S. Miller --- arch/sparc/include/asm/page_64.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'arch/sparc/include') diff --git a/arch/sparc/include/asm/page_64.h b/arch/sparc/include/asm/page_64.h index f294dd42fc7d..5961b2d8398a 100644 --- a/arch/sparc/include/asm/page_64.h +++ b/arch/sparc/include/asm/page_64.h @@ -17,6 +17,7 @@ #define HPAGE_SHIFT 23 #define REAL_HPAGE_SHIFT 22 +#define HPAGE_2GB_SHIFT 31 #define HPAGE_256MB_SHIFT 28 #define HPAGE_64K_SHIFT 16 #define REAL_HPAGE_SIZE (_AC(1,UL) << REAL_HPAGE_SHIFT) @@ -27,7 +28,7 @@ #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) #define HAVE_ARCH_HUGETLB_UNMAPPED_AREA #define REAL_HPAGE_PER_HPAGE (_AC(1,UL) << (HPAGE_SHIFT - REAL_HPAGE_SHIFT)) -#define HUGE_MAX_HSTATE 3 +#define HUGE_MAX_HSTATE 4 #endif #ifndef __ASSEMBLY__ -- cgit v1.2.3 From 9ae34dbd8afd790cb5f52467e4f816434379eafa Mon Sep 17 00:00:00 2001 From: Tom Hromatka Date: Fri, 31 Mar 2017 16:31:42 -0600 Subject: sparc64: Fix kernel panic due to erroneous #ifdef surrounding pmd_write() This commit moves sparc64's prototype of pmd_write() outside of the CONFIG_TRANSPARENT_HUGEPAGE ifdef. In 2013, commit a7b9403f0e6d ("sparc64: Encode huge PMDs using PTE encoding.") exposed a path where pmd_write() could be called without CONFIG_TRANSPARENT_HUGEPAGE defined. This can result in the panic below. The diff is awkward to read, but the changes are straightforward. pmd_write() was moved outside of #ifdef CONFIG_TRANSPARENT_HUGEPAGE. Also, __HAVE_ARCH_PMD_WRITE was defined. kernel BUG at include/asm-generic/pgtable.h:576! \|/ ____ \|/ "@'/ .. \`@" /_| \__/ |_\ \__U_/ oracle_8114_cdb(8114): Kernel bad sw trap 5 [#1] CPU: 120 PID: 8114 Comm: oracle_8114_cdb Not tainted 4.1.12-61.7.1.el6uek.rc1.sparc64 #1 task: fff8400700a24d60 ti: fff8400700bc4000 task.ti: fff8400700bc4000 TSTATE: 0000004411e01607 TPC: 00000000004609f8 TNPC: 00000000004609fc Y: 00000005 Not tainted TPC: g0: 000000000001c000 g1: 0000000000ef3954 g2: 0000000000000000 g3: 0000000000000001 g4: fff8400700a24d60 g5: fff8001fa5c10000 g6: fff8400700bc4000 g7: 0000000000000720 o0: 0000000000bc5058 o1: 0000000000000240 o2: 0000000000006000 o3: 0000000000001c00 o4: 0000000000000000 o5: 0000048000080000 sp: fff8400700bc6ab1 ret_pc: 00000000004609f0 RPC: l0: fff8400700bc74fc l1: 0000000000020000 l2: 0000000000002000 l3: 0000000000000000 l4: fff8001f93250950 l5: 000000000113f800 l6: 0000000000000004 l7: 0000000000000000 i0: fff8400700ca46a0 i1: bd0000085e800453 i2: 000000026a0c4000 i3: 000000026a0c6000 i4: 0000000000000001 i5: fff800070c958de8 i6: fff8400700bc6b61 i7: 0000000000460dd0 I7: Call Trace: [0000000000460dd0] gup_pud_range+0x170/0x1a0 [0000000000460e84] get_user_pages_fast+0x84/0x120 [00000000006f5a18] iov_iter_get_pages+0x98/0x240 [00000000005fa744] do_direct_IO+0xf64/0x1e00 [00000000005fbbc0] __blockdev_direct_IO+0x360/0x15a0 [00000000101f74fc] ext4_ind_direct_IO+0xdc/0x400 [ext4] [00000000101af690] ext4_ext_direct_IO+0x1d0/0x2c0 [ext4] [00000000101af86c] ext4_direct_IO+0xec/0x220 [ext4] [0000000000553bd4] generic_file_read_iter+0x114/0x140 [00000000005bdc2c] __vfs_read+0xac/0x100 [00000000005bf254] vfs_read+0x54/0x100 [00000000005bf368] SyS_pread64+0x68/0x80 Signed-off-by: Tom Hromatka Signed-off-by: David S. Miller --- arch/sparc/include/asm/pgtable_64.h | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-) (limited to 'arch/sparc/include') diff --git a/arch/sparc/include/asm/pgtable_64.h b/arch/sparc/include/asm/pgtable_64.h index 8a598528ec1f..6fbd931f0570 100644 --- a/arch/sparc/include/asm/pgtable_64.h +++ b/arch/sparc/include/asm/pgtable_64.h @@ -679,26 +679,27 @@ static inline unsigned long pmd_pfn(pmd_t pmd) return pte_pfn(pte); } -#ifdef CONFIG_TRANSPARENT_HUGEPAGE -static inline unsigned long pmd_dirty(pmd_t pmd) +#define __HAVE_ARCH_PMD_WRITE +static inline unsigned long pmd_write(pmd_t pmd) { pte_t pte = __pte(pmd_val(pmd)); - return pte_dirty(pte); + return pte_write(pte); } -static inline unsigned long pmd_young(pmd_t pmd) +#ifdef CONFIG_TRANSPARENT_HUGEPAGE +static inline unsigned long pmd_dirty(pmd_t pmd) { pte_t pte = __pte(pmd_val(pmd)); - return pte_young(pte); + return pte_dirty(pte); } -static inline unsigned long pmd_write(pmd_t pmd) +static inline unsigned long pmd_young(pmd_t pmd) { pte_t pte = __pte(pmd_val(pmd)); - return pte_write(pte); + return pte_young(pte); } static inline unsigned long pmd_trans_huge(pmd_t pmd) -- cgit v1.2.3 From 86e1066fe2af51dce4351c2357223e0d902dfc7a Mon Sep 17 00:00:00 2001 From: Mathias Krause Date: Wed, 5 Apr 2017 21:24:20 +0200 Subject: sparc: remove unused wp_works_ok macro It's unused for ages, used to be required for ksyms.c back in the v1.1 times. Signed-off-by: Mathias Krause Acked-by: David S. Miller Signed-off-by: David S. Miller --- arch/sparc/include/asm/processor_32.h | 6 ------ arch/sparc/include/asm/processor_64.h | 4 ---- 2 files changed, 10 deletions(-) (limited to 'arch/sparc/include') diff --git a/arch/sparc/include/asm/processor_32.h b/arch/sparc/include/asm/processor_32.h index 365d4cb267b4..dd27159819eb 100644 --- a/arch/sparc/include/asm/processor_32.h +++ b/arch/sparc/include/asm/processor_32.h @@ -18,12 +18,6 @@ #include #include -/* - * The sparc has no problems with write protection - */ -#define wp_works_ok 1 -#define wp_works_ok__is_a_macro /* for versions in ksyms.c */ - /* Whee, this is STACK_TOP + PAGE_SIZE and the lowest kernel address too... * That one page is used to protect kernel from intruders, so that * we can make our access_ok test faster diff --git a/arch/sparc/include/asm/processor_64.h b/arch/sparc/include/asm/processor_64.h index 6448cfc8292f..b58ee9018433 100644 --- a/arch/sparc/include/asm/processor_64.h +++ b/arch/sparc/include/asm/processor_64.h @@ -18,10 +18,6 @@ #include #include -/* The sparc has no problems with write protection */ -#define wp_works_ok 1 -#define wp_works_ok__is_a_macro /* for versions in ksyms.c */ - /* * User lives in his very own context, and cannot reference us. Note * that TASK_SIZE is a misnomer, it really gives maximum user virtual -- cgit v1.2.3