From 5b61d4a5d6676b5bb4c3c101683d3c7fd0df2a38 Mon Sep 17 00:00:00 2001 From: Christopher Covington Date: Wed, 29 Jan 2014 22:01:31 +0100 Subject: ARM: 7948/1: hw_breakpoint: Add ARMv8 support Add the trivial support necessary to get hardware breakpoints working for GDB on ARMv8 simulators running in AArch32 mode. Acked-by: Will Deacon Signed-off-by: Christopher Covington Signed-off-by: Russell King --- arch/arm/kernel/hw_breakpoint.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'arch/arm/kernel') diff --git a/arch/arm/kernel/hw_breakpoint.c b/arch/arm/kernel/hw_breakpoint.c index 3d446605cbf8..9da35c6d3411 100644 --- a/arch/arm/kernel/hw_breakpoint.c +++ b/arch/arm/kernel/hw_breakpoint.c @@ -167,7 +167,7 @@ static int debug_arch_supported(void) /* Can we determine the watchpoint access type from the fsr? */ static int debug_exception_updates_fsr(void) { - return 0; + return get_debug_arch() >= ARM_DEBUG_ARCH_V8; } /* Determine number of WRP registers available. */ @@ -257,6 +257,7 @@ static int enable_monitor_mode(void) break; case ARM_DEBUG_ARCH_V7_ECP14: case ARM_DEBUG_ARCH_V7_1: + case ARM_DEBUG_ARCH_V8: ARM_DBG_WRITE(c0, c2, 2, (dscr | ARM_DSCR_MDBGEN)); isb(); break; -- cgit v1.2.3 From 27e8efdbf1aecb65dd712fd93766f1a04b86ac22 Mon Sep 17 00:00:00 2001 From: Will Deacon Date: Fri, 21 Feb 2014 18:48:01 +0100 Subject: ARM: 7986/1: bios32: use pci_enable_resource to enable PCI resources This patch moves bios32 over to using the generic code for enabling PCI resources. Since the core code takes care of bridge resources too, we can also drop the explicit IO and MEMORY enabling for them in the arch code. A side-effect of this change is that we no longer explicitly enable devices when running in PCI_PROBE_ONLY mode. This stays closer to the meaning of the option and prevents us from trying to enable devices without any assigned resources (the core code refuses to enable resources without parents). Tested-by: Jason Gunthorpe Tested-by: Jingoo Han Signed-off-by: Will Deacon Signed-off-by: Russell King --- arch/arm/kernel/bios32.c | 37 +++---------------------------------- 1 file changed, 3 insertions(+), 34 deletions(-) (limited to 'arch/arm/kernel') diff --git a/arch/arm/kernel/bios32.c b/arch/arm/kernel/bios32.c index 317da88ae65b..91f48804e3bb 100644 --- a/arch/arm/kernel/bios32.c +++ b/arch/arm/kernel/bios32.c @@ -608,41 +608,10 @@ resource_size_t pcibios_align_resource(void *data, const struct resource *res, */ int pcibios_enable_device(struct pci_dev *dev, int mask) { - u16 cmd, old_cmd; - int idx; - struct resource *r; - - pci_read_config_word(dev, PCI_COMMAND, &cmd); - old_cmd = cmd; - for (idx = 0; idx < 6; idx++) { - /* Only set up the requested stuff */ - if (!(mask & (1 << idx))) - continue; - - r = dev->resource + idx; - if (!r->start && r->end) { - printk(KERN_ERR "PCI: Device %s not available because" - " of resource collisions\n", pci_name(dev)); - return -EINVAL; - } - if (r->flags & IORESOURCE_IO) - cmd |= PCI_COMMAND_IO; - if (r->flags & IORESOURCE_MEM) - cmd |= PCI_COMMAND_MEMORY; - } + if (pci_has_flag(PCI_PROBE_ONLY)) + return 0; - /* - * Bridges (eg, cardbus bridges) need to be fully enabled - */ - if ((dev->class >> 16) == PCI_BASE_CLASS_BRIDGE) - cmd |= PCI_COMMAND_IO | PCI_COMMAND_MEMORY; - - if (cmd != old_cmd) { - printk("PCI: enabling device %s (%04x -> %04x)\n", - pci_name(dev), old_cmd, cmd); - pci_write_config_word(dev, PCI_COMMAND, cmd); - } - return 0; + return pci_enable_resources(dev, mask); } int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma, -- cgit v1.2.3 From b342ea4e4ff970518264c81eefd05f637e3f193a Mon Sep 17 00:00:00 2001 From: Ard Biesheuvel Date: Wed, 19 Feb 2014 22:28:40 +0100 Subject: ARM: 7981/1: add support for AT_HWCAP2 ELF auxv entry This enables AT_HWCAP2 for ARM. The generic support for this new ELF auxv entry was added in commit 2171364d1a9 (powerpc: Add HWCAP2 aux entry) Signed-off-by: Ard Biesheuvel Acked-by: Catalin Marinas Signed-off-by: Russell King --- arch/arm/include/asm/hwcap.h | 3 ++- arch/arm/include/uapi/asm/hwcap.h | 4 ++++ arch/arm/kernel/setup.c | 11 +++++++++++ 3 files changed, 17 insertions(+), 1 deletion(-) (limited to 'arch/arm/kernel') diff --git a/arch/arm/include/asm/hwcap.h b/arch/arm/include/asm/hwcap.h index 6ff56eca3f1f..6e183fd269fb 100644 --- a/arch/arm/include/asm/hwcap.h +++ b/arch/arm/include/asm/hwcap.h @@ -9,6 +9,7 @@ * instruction set this cpu supports. */ #define ELF_HWCAP (elf_hwcap) -extern unsigned int elf_hwcap; +#define ELF_HWCAP2 (elf_hwcap2) +extern unsigned int elf_hwcap, elf_hwcap2; #endif #endif diff --git a/arch/arm/include/uapi/asm/hwcap.h b/arch/arm/include/uapi/asm/hwcap.h index 7dcc10d67253..87768b5cffd1 100644 --- a/arch/arm/include/uapi/asm/hwcap.h +++ b/arch/arm/include/uapi/asm/hwcap.h @@ -28,4 +28,8 @@ #define HWCAP_LPAE (1 << 20) #define HWCAP_EVTSTRM (1 << 21) +/* + * HWCAP2 flags - for elf_hwcap2 (in kernel) and AT_HWCAP2 + */ + #endif /* _UAPI__ASMARM_HWCAP_H */ diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c index b0df9761de6d..dbb5449d6b79 100644 --- a/arch/arm/kernel/setup.c +++ b/arch/arm/kernel/setup.c @@ -100,6 +100,9 @@ EXPORT_SYMBOL(system_serial_high); unsigned int elf_hwcap __read_mostly; EXPORT_SYMBOL(elf_hwcap); +unsigned int elf_hwcap2 __read_mostly; +EXPORT_SYMBOL(elf_hwcap2); + #ifdef MULTI_CPU struct processor processor __read_mostly; @@ -1005,6 +1008,10 @@ static const char *hwcap_str[] = { NULL }; +static const char *hwcap2_str[] = { + NULL +}; + static int c_show(struct seq_file *m, void *v) { int i, j; @@ -1028,6 +1035,10 @@ static int c_show(struct seq_file *m, void *v) if (elf_hwcap & (1 << j)) seq_printf(m, "%s ", hwcap_str[j]); + for (j = 0; hwcap2_str[j]; j++) + if (elf_hwcap2 & (1 << j)) + seq_printf(m, "%s ", hwcap2_str[j]); + seq_printf(m, "\nCPU implementer\t: 0x%02x\n", cpuid >> 24); seq_printf(m, "CPU architecture: %s\n", proc_arch[cpu_architecture()]); -- cgit v1.2.3 From 8258a9895c99cdaacad8edc4748c0a624c710961 Mon Sep 17 00:00:00 2001 From: Ard Biesheuvel Date: Wed, 19 Feb 2014 22:29:40 +0100 Subject: ARM: 7982/1: introduce HWCAP2 feature bits for ARMv8 Crypto Extensions This allocates feature bits 0-4 in HWCAP2 for the crypto and CRC extensions introduced in ARMv8. Signed-off-by: Ard Biesheuvel Acked-by: Catalin Marinas Signed-off-by: Russell King --- arch/arm/include/uapi/asm/hwcap.h | 5 +++++ arch/arm/kernel/setup.c | 5 +++++ 2 files changed, 10 insertions(+) (limited to 'arch/arm/kernel') diff --git a/arch/arm/include/uapi/asm/hwcap.h b/arch/arm/include/uapi/asm/hwcap.h index 87768b5cffd1..20d12f230a2f 100644 --- a/arch/arm/include/uapi/asm/hwcap.h +++ b/arch/arm/include/uapi/asm/hwcap.h @@ -31,5 +31,10 @@ /* * HWCAP2 flags - for elf_hwcap2 (in kernel) and AT_HWCAP2 */ +#define HWCAP2_AES (1 << 0) +#define HWCAP2_PMULL (1 << 1) +#define HWCAP2_SHA1 (1 << 2) +#define HWCAP2_SHA2 (1 << 3) +#define HWCAP2_CRC32 (1 << 4) #endif /* _UAPI__ASMARM_HWCAP_H */ diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c index dbb5449d6b79..0a6c70b0b0f9 100644 --- a/arch/arm/kernel/setup.c +++ b/arch/arm/kernel/setup.c @@ -1009,6 +1009,11 @@ static const char *hwcap_str[] = { }; static const char *hwcap2_str[] = { + "aes", + "pmull", + "sha1", + "sha2", + "crc32", NULL }; -- cgit v1.2.3 From a51345770e519552e749ff457a2a9f83171a67b5 Mon Sep 17 00:00:00 2001 From: Anurag Aggarwal Date: Mon, 24 Feb 2014 11:17:36 +0100 Subject: ARM: 7987/1: ARM : unwinder : Prevent data abort due to stack overflow While unwinding backtrace, stack overflow is possible. This stack overflow can sometimes lead to data abort in system if the area after stack is not mapped to physical memory. To prevent this problem from happening, execute the instructions that can cause a data abort in separate helper functions, where a check for feasibility is made before reading each word from the stack. Signed-off-by: Anurag Aggarwal Reviewed-by: Dave Martin Signed-off-by: Russell King --- arch/arm/kernel/unwind.c | 137 ++++++++++++++++++++++++++++++++++------------- 1 file changed, 100 insertions(+), 37 deletions(-) (limited to 'arch/arm/kernel') diff --git a/arch/arm/kernel/unwind.c b/arch/arm/kernel/unwind.c index 00df012c4678..3c217694ebec 100644 --- a/arch/arm/kernel/unwind.c +++ b/arch/arm/kernel/unwind.c @@ -68,6 +68,12 @@ EXPORT_SYMBOL(__aeabi_unwind_cpp_pr2); struct unwind_ctrl_block { unsigned long vrs[16]; /* virtual register set */ const unsigned long *insn; /* pointer to the current instructions word */ + unsigned long sp_high; /* highest value of sp allowed */ + /* + * 1 : check for stack overflow for each register pop. + * 0 : save overhead if there is plenty of stack remaining. + */ + int check_each_pop; int entries; /* number of entries left to interpret */ int byte; /* current byte number in the instructions word */ }; @@ -235,12 +241,85 @@ static unsigned long unwind_get_byte(struct unwind_ctrl_block *ctrl) return ret; } +/* Before poping a register check whether it is feasible or not */ +static int unwind_pop_register(struct unwind_ctrl_block *ctrl, + unsigned long **vsp, unsigned int reg) +{ + if (unlikely(ctrl->check_each_pop)) + if (*vsp >= (unsigned long *)ctrl->sp_high) + return -URC_FAILURE; + + ctrl->vrs[reg] = *(*vsp)++; + return URC_OK; +} + +/* Helper functions to execute the instructions */ +static int unwind_exec_pop_subset_r4_to_r13(struct unwind_ctrl_block *ctrl, + unsigned long mask) +{ + unsigned long *vsp = (unsigned long *)ctrl->vrs[SP]; + int load_sp, reg = 4; + + load_sp = mask & (1 << (13 - 4)); + while (mask) { + if (mask & 1) + if (unwind_pop_register(ctrl, &vsp, reg)) + return -URC_FAILURE; + mask >>= 1; + reg++; + } + if (!load_sp) + ctrl->vrs[SP] = (unsigned long)vsp; + + return URC_OK; +} + +static int unwind_exec_pop_r4_to_rN(struct unwind_ctrl_block *ctrl, + unsigned long insn) +{ + unsigned long *vsp = (unsigned long *)ctrl->vrs[SP]; + int reg; + + /* pop R4-R[4+bbb] */ + for (reg = 4; reg <= 4 + (insn & 7); reg++) + if (unwind_pop_register(ctrl, &vsp, reg)) + return -URC_FAILURE; + + if (insn & 0x80) + if (unwind_pop_register(ctrl, &vsp, 14)) + return -URC_FAILURE; + + ctrl->vrs[SP] = (unsigned long)vsp; + + return URC_OK; +} + +static int unwind_exec_pop_subset_r0_to_r3(struct unwind_ctrl_block *ctrl, + unsigned long mask) +{ + unsigned long *vsp = (unsigned long *)ctrl->vrs[SP]; + int reg = 0; + + /* pop R0-R3 according to mask */ + while (mask) { + if (mask & 1) + if (unwind_pop_register(ctrl, &vsp, reg)) + return -URC_FAILURE; + mask >>= 1; + reg++; + } + ctrl->vrs[SP] = (unsigned long)vsp; + + return URC_OK; +} + /* * Execute the current unwind instruction. */ static int unwind_exec_insn(struct unwind_ctrl_block *ctrl) { unsigned long insn = unwind_get_byte(ctrl); + int ret = URC_OK; pr_debug("%s: insn = %08lx\n", __func__, insn); @@ -250,8 +329,6 @@ static int unwind_exec_insn(struct unwind_ctrl_block *ctrl) ctrl->vrs[SP] -= ((insn & 0x3f) << 2) + 4; else if ((insn & 0xf0) == 0x80) { unsigned long mask; - unsigned long *vsp = (unsigned long *)ctrl->vrs[SP]; - int load_sp, reg = 4; insn = (insn << 8) | unwind_get_byte(ctrl); mask = insn & 0x0fff; @@ -261,29 +338,16 @@ static int unwind_exec_insn(struct unwind_ctrl_block *ctrl) return -URC_FAILURE; } - /* pop R4-R15 according to mask */ - load_sp = mask & (1 << (13 - 4)); - while (mask) { - if (mask & 1) - ctrl->vrs[reg] = *vsp++; - mask >>= 1; - reg++; - } - if (!load_sp) - ctrl->vrs[SP] = (unsigned long)vsp; + ret = unwind_exec_pop_subset_r4_to_r13(ctrl, mask); + if (ret) + goto error; } else if ((insn & 0xf0) == 0x90 && (insn & 0x0d) != 0x0d) ctrl->vrs[SP] = ctrl->vrs[insn & 0x0f]; else if ((insn & 0xf0) == 0xa0) { - unsigned long *vsp = (unsigned long *)ctrl->vrs[SP]; - int reg; - - /* pop R4-R[4+bbb] */ - for (reg = 4; reg <= 4 + (insn & 7); reg++) - ctrl->vrs[reg] = *vsp++; - if (insn & 0x80) - ctrl->vrs[14] = *vsp++; - ctrl->vrs[SP] = (unsigned long)vsp; + ret = unwind_exec_pop_r4_to_rN(ctrl, insn); + if (ret) + goto error; } else if (insn == 0xb0) { if (ctrl->vrs[PC] == 0) ctrl->vrs[PC] = ctrl->vrs[LR]; @@ -291,8 +355,6 @@ static int unwind_exec_insn(struct unwind_ctrl_block *ctrl) ctrl->entries = 0; } else if (insn == 0xb1) { unsigned long mask = unwind_get_byte(ctrl); - unsigned long *vsp = (unsigned long *)ctrl->vrs[SP]; - int reg = 0; if (mask == 0 || mask & 0xf0) { pr_warning("unwind: Spare encoding %04lx\n", @@ -300,14 +362,9 @@ static int unwind_exec_insn(struct unwind_ctrl_block *ctrl) return -URC_FAILURE; } - /* pop R0-R3 according to mask */ - while (mask) { - if (mask & 1) - ctrl->vrs[reg] = *vsp++; - mask >>= 1; - reg++; - } - ctrl->vrs[SP] = (unsigned long)vsp; + ret = unwind_exec_pop_subset_r0_to_r3(ctrl, mask); + if (ret) + goto error; } else if (insn == 0xb2) { unsigned long uleb128 = unwind_get_byte(ctrl); @@ -320,7 +377,8 @@ static int unwind_exec_insn(struct unwind_ctrl_block *ctrl) pr_debug("%s: fp = %08lx sp = %08lx lr = %08lx pc = %08lx\n", __func__, ctrl->vrs[FP], ctrl->vrs[SP], ctrl->vrs[LR], ctrl->vrs[PC]); - return URC_OK; +error: + return ret; } /* @@ -329,13 +387,13 @@ static int unwind_exec_insn(struct unwind_ctrl_block *ctrl) */ int unwind_frame(struct stackframe *frame) { - unsigned long high, low; + unsigned long low; const struct unwind_idx *idx; struct unwind_ctrl_block ctrl; - /* only go to a higher address on the stack */ + /* store the highest address on the stack to avoid crossing it*/ low = frame->sp; - high = ALIGN(low, THREAD_SIZE); + ctrl.sp_high = ALIGN(low, THREAD_SIZE); pr_debug("%s(pc = %08lx lr = %08lx sp = %08lx)\n", __func__, frame->pc, frame->lr, frame->sp); @@ -382,11 +440,16 @@ int unwind_frame(struct stackframe *frame) return -URC_FAILURE; } + ctrl.check_each_pop = 0; + while (ctrl.entries > 0) { - int urc = unwind_exec_insn(&ctrl); + int urc; + if ((ctrl.sp_high - ctrl.vrs[SP]) < sizeof(ctrl.vrs)) + ctrl.check_each_pop = 1; + urc = unwind_exec_insn(&ctrl); if (urc < 0) return urc; - if (ctrl.vrs[SP] < low || ctrl.vrs[SP] >= high) + if (ctrl.vrs[SP] < low || ctrl.vrs[SP] >= ctrl.sp_high) return -URC_FAILURE; } -- cgit v1.2.3 From e26a9e00afc482b971afcaef1db8c9034d4d6d7c Mon Sep 17 00:00:00 2001 From: Russell King Date: Tue, 25 Mar 2014 19:45:31 +0000 Subject: ARM: Better virt_to_page() handling virt_to_page() is incredibly inefficient when virt-to-phys patching is enabled. This is because we end up with this calculation: page = &mem_map[asm virt_to_phys(addr) >> 12 - __pv_phys_offset >> 12] in assembly. The asm virt_to_phys() is equivalent this this operation: addr - PAGE_OFFSET + __pv_phys_offset and we can see that because this is assembly, the compiler has no chance to optimise some of that away. This should reduce down to: page = &mem_map[(addr - PAGE_OFFSET) >> 12] for the common cases. Permit the compiler to make this optimisation by giving it more of the information it needs - do this by providing a virt_to_pfn() macro. Another issue which makes this more complex is that __pv_phys_offset is a 64-bit type on all platforms. This is needlessly wasteful - if we store the physical offset as a PFN, we can save a lot of work having to deal with 64-bit values, which sometimes ends up producing incredibly horrid code: a4c: e3009000 movw r9, #0 a4c: R_ARM_MOVW_ABS_NC __pv_phys_offset a50: e3409000 movt r9, #0 ; r9 = &__pv_phys_offset a50: R_ARM_MOVT_ABS __pv_phys_offset a54: e3002000 movw r2, #0 a54: R_ARM_MOVW_ABS_NC __pv_phys_offset a58: e3402000 movt r2, #0 ; r2 = &__pv_phys_offset a58: R_ARM_MOVT_ABS __pv_phys_offset a5c: e5999004 ldr r9, [r9, #4] ; r9 = high word of __pv_phys_offset a60: e3001000 movw r1, #0 a60: R_ARM_MOVW_ABS_NC mem_map a64: e592c000 ldr ip, [r2] ; ip = low word of __pv_phys_offset Reviewed-by: Nicolas Pitre Signed-off-by: Russell King --- arch/arm/include/asm/memory.h | 41 ++++++++++++++++++++++++----------------- arch/arm/kernel/armksyms.c | 2 +- arch/arm/kernel/head.S | 17 +++++++++-------- 3 files changed, 34 insertions(+), 26 deletions(-) (limited to 'arch/arm/kernel') diff --git a/arch/arm/include/asm/memory.h b/arch/arm/include/asm/memory.h index 8756e4bcdba0..2438d72cf4e6 100644 --- a/arch/arm/include/asm/memory.h +++ b/arch/arm/include/asm/memory.h @@ -169,9 +169,17 @@ * Physical vs virtual RAM address space conversion. These are * private definitions which should NOT be used outside memory.h * files. Use virt_to_phys/phys_to_virt/__pa/__va instead. + * + * PFNs are used to describe any physical page; this means + * PFN 0 == physical address 0. */ -#ifndef __virt_to_phys -#ifdef CONFIG_ARM_PATCH_PHYS_VIRT +#if defined(__virt_to_phys) +#define PHYS_OFFSET PLAT_PHYS_OFFSET +#define PHYS_PFN_OFFSET ((unsigned long)(PHYS_OFFSET >> PAGE_SHIFT)) + +#define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT) + +#elif defined(CONFIG_ARM_PATCH_PHYS_VIRT) /* * Constants used to force the right instruction encodings and shifts @@ -180,12 +188,17 @@ #define __PV_BITS_31_24 0x81000000 #define __PV_BITS_7_0 0x81 -extern u64 __pv_phys_offset; +extern unsigned long __pv_phys_pfn_offset; extern u64 __pv_offset; extern void fixup_pv_table(const void *, unsigned long); extern const void *__pv_table_begin, *__pv_table_end; -#define PHYS_OFFSET __pv_phys_offset +#define PHYS_OFFSET ((phys_addr_t)__pv_phys_pfn_offset << PAGE_SHIFT) +#define PHYS_PFN_OFFSET (__pv_phys_pfn_offset) + +#define virt_to_pfn(kaddr) \ + ((((unsigned long)(kaddr) - PAGE_OFFSET) >> PAGE_SHIFT) + \ + PHYS_PFN_OFFSET) #define __pv_stub(from,to,instr,type) \ __asm__("@ __pv_stub\n" \ @@ -246,6 +259,7 @@ static inline unsigned long __phys_to_virt(phys_addr_t x) #else #define PHYS_OFFSET PLAT_PHYS_OFFSET +#define PHYS_PFN_OFFSET ((unsigned long)(PHYS_OFFSET >> PAGE_SHIFT)) static inline phys_addr_t __virt_to_phys(unsigned long x) { @@ -257,18 +271,11 @@ static inline unsigned long __phys_to_virt(phys_addr_t x) return x - PHYS_OFFSET + PAGE_OFFSET; } -#endif -#endif +#define virt_to_pfn(kaddr) \ + ((((unsigned long)(kaddr) - PAGE_OFFSET) >> PAGE_SHIFT) + \ + PHYS_PFN_OFFSET) -/* - * PFNs are used to describe any physical page; this means - * PFN 0 == physical address 0. - * - * This is the PFN of the first RAM page in the kernel - * direct-mapped view. We assume this is the first page - * of RAM in the mem_map as well. - */ -#define PHYS_PFN_OFFSET ((unsigned long)(PHYS_OFFSET >> PAGE_SHIFT)) +#endif /* * These are *only* valid on the kernel direct mapped RAM memory. @@ -346,9 +353,9 @@ static inline __deprecated void *bus_to_virt(unsigned long x) */ #define ARCH_PFN_OFFSET PHYS_PFN_OFFSET -#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) +#define virt_to_page(kaddr) pfn_to_page(virt_to_pfn(kaddr)) #define virt_addr_valid(kaddr) (((unsigned long)(kaddr) >= PAGE_OFFSET && (unsigned long)(kaddr) < (unsigned long)high_memory) \ - && pfn_valid(__pa(kaddr) >> PAGE_SHIFT) ) + && pfn_valid(virt_to_pfn(kaddr))) #endif diff --git a/arch/arm/kernel/armksyms.c b/arch/arm/kernel/armksyms.c index 85e664b6a5f1..f7b450f97e68 100644 --- a/arch/arm/kernel/armksyms.c +++ b/arch/arm/kernel/armksyms.c @@ -158,6 +158,6 @@ EXPORT_SYMBOL(__gnu_mcount_nc); #endif #ifdef CONFIG_ARM_PATCH_PHYS_VIRT -EXPORT_SYMBOL(__pv_phys_offset); +EXPORT_SYMBOL(__pv_phys_pfn_offset); EXPORT_SYMBOL(__pv_offset); #endif diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S index 914616e0bdcd..3aca959fee8d 100644 --- a/arch/arm/kernel/head.S +++ b/arch/arm/kernel/head.S @@ -584,9 +584,10 @@ __fixup_pv_table: subs r3, r0, r3 @ PHYS_OFFSET - PAGE_OFFSET add r4, r4, r3 @ adjust table start address add r5, r5, r3 @ adjust table end address - add r6, r6, r3 @ adjust __pv_phys_offset address + add r6, r6, r3 @ adjust __pv_phys_pfn_offset address add r7, r7, r3 @ adjust __pv_offset address - str r8, [r6, #LOW_OFFSET] @ save computed PHYS_OFFSET to __pv_phys_offset + mov r0, r8, lsr #12 @ convert to PFN + str r0, [r6, #LOW_OFFSET] @ save computed PHYS_OFFSET to __pv_phys_pfn_offset strcc ip, [r7, #HIGH_OFFSET] @ save to __pv_offset high bits mov r6, r3, lsr #24 @ constant for add/sub instructions teq r3, r6, lsl #24 @ must be 16MiB aligned @@ -600,7 +601,7 @@ ENDPROC(__fixup_pv_table) 1: .long . .long __pv_table_begin .long __pv_table_end -2: .long __pv_phys_offset +2: .long __pv_phys_pfn_offset .long __pv_offset .text @@ -688,11 +689,11 @@ ENTRY(fixup_pv_table) ENDPROC(fixup_pv_table) .data - .globl __pv_phys_offset - .type __pv_phys_offset, %object -__pv_phys_offset: - .quad 0 - .size __pv_phys_offset, . -__pv_phys_offset + .globl __pv_phys_pfn_offset + .type __pv_phys_pfn_offset, %object +__pv_phys_pfn_offset: + .word 0 + .size __pv_phys_pfn_offset, . -__pv_phys_pfn_offset .globl __pv_offset .type __pv_offset, %object -- cgit v1.2.3