From d0b2f91bede3bd5e3d24dd6803e56eee959c1797 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Thu, 20 Oct 2016 00:10:27 -0300 Subject: Linux-libre 4.8.2-gnu --- arch/arm/kernel/asm-offsets.c | 5 +++- arch/arm/kernel/bios32.c | 45 ++++++++++++++++-------------------- arch/arm/kernel/cpuidle.c | 23 +++++++++++-------- arch/arm/kernel/devtree.c | 17 +++++++++++--- arch/arm/kernel/entry-armv.S | 20 ++++++++++------ arch/arm/kernel/entry-common.S | 2 +- arch/arm/kernel/entry-header.S | 12 ++++++---- arch/arm/kernel/entry-v7m.S | 2 +- arch/arm/kernel/hyp-stub.S | 13 +++++++++++ arch/arm/kernel/machine_kexec.c | 2 +- arch/arm/kernel/process.c | 14 +++++++---- arch/arm/kernel/ptrace.c | 13 ++++++----- arch/arm/kernel/setup.c | 51 ++++++++++++++++++++++++++++++++--------- arch/arm/kernel/smp_tlb.c | 44 +++++++++++++++++++++++++++++++---- arch/arm/kernel/smp_twd.c | 34 +++++++++++---------------- arch/arm/kernel/vmlinux.lds.S | 6 ++--- 16 files changed, 200 insertions(+), 103 deletions(-) (limited to 'arch/arm/kernel') diff --git a/arch/arm/kernel/asm-offsets.c b/arch/arm/kernel/asm-offsets.c index 27d05813f..608008229 100644 --- a/arch/arm/kernel/asm-offsets.c +++ b/arch/arm/kernel/asm-offsets.c @@ -107,7 +107,10 @@ int main(void) DEFINE(S_PC, offsetof(struct pt_regs, ARM_pc)); DEFINE(S_PSR, offsetof(struct pt_regs, ARM_cpsr)); DEFINE(S_OLD_R0, offsetof(struct pt_regs, ARM_ORIG_r0)); - DEFINE(S_FRAME_SIZE, sizeof(struct pt_regs)); + DEFINE(PT_REGS_SIZE, sizeof(struct pt_regs)); + DEFINE(SVC_DACR, offsetof(struct svc_pt_regs, dacr)); + DEFINE(SVC_ADDR_LIMIT, offsetof(struct svc_pt_regs, addr_limit)); + DEFINE(SVC_REGS_SIZE, sizeof(struct svc_pt_regs)); BLANK(); #ifdef CONFIG_CACHE_L2X0 DEFINE(L2X0_R_PHY_BASE, offsetof(struct l2x0_regs, phy_base)); diff --git a/arch/arm/kernel/bios32.c b/arch/arm/kernel/bios32.c index 05e61a2ee..2f0e07735 100644 --- a/arch/arm/kernel/bios32.c +++ b/arch/arm/kernel/bios32.c @@ -410,7 +410,8 @@ static int pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) return irq; } -static int pcibios_init_resources(int busnr, struct pci_sys_data *sys) +static int pcibios_init_resource(int busnr, struct pci_sys_data *sys, + int io_optional) { int ret; struct resource_entry *window; @@ -420,6 +421,14 @@ static int pcibios_init_resources(int busnr, struct pci_sys_data *sys) &iomem_resource, sys->mem_offset); } + /* + * If a platform says I/O port support is optional, we don't add + * the default I/O space. The platform is responsible for adding + * any I/O space it needs. + */ + if (io_optional) + return 0; + resource_list_for_each_entry(window, &sys->resources) if (resource_type(window->res) == IORESOURCE_IO) return 0; @@ -466,7 +475,7 @@ static void pcibios_init_hw(struct device *parent, struct hw_pci *hw, if (ret > 0) { struct pci_host_bridge *host_bridge; - ret = pcibios_init_resources(nr, sys); + ret = pcibios_init_resource(nr, sys, hw->io_optional); if (ret) { kfree(sys); break; @@ -515,25 +524,23 @@ void pci_common_init_dev(struct device *parent, struct hw_pci *hw) list_for_each_entry(sys, &head, node) { struct pci_bus *bus = sys->bus; - if (!pci_has_flag(PCI_PROBE_ONLY)) { + /* + * We insert PCI resources into the iomem_resource and + * ioport_resource trees in either pci_bus_claim_resources() + * or pci_bus_assign_resources(). + */ + if (pci_has_flag(PCI_PROBE_ONLY)) { + pci_bus_claim_resources(bus); + } else { struct pci_bus *child; - /* - * Size the bridge windows. - */ pci_bus_size_bridges(bus); - - /* - * Assign resources. - */ pci_bus_assign_resources(bus); list_for_each_entry(child, &bus->children, node) pcie_bus_configure_settings(child); } - /* - * Tell drivers about devices found. - */ + pci_bus_add_devices(bus); } } @@ -590,18 +597,6 @@ resource_size_t pcibios_align_resource(void *data, const struct resource *res, return start; } -/** - * pcibios_enable_device - Enable I/O and memory. - * @dev: PCI device to be enabled - */ -int pcibios_enable_device(struct pci_dev *dev, int mask) -{ - if (pci_has_flag(PCI_PROBE_ONLY)) - return 0; - - return pci_enable_resources(dev, mask); -} - int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma, enum pci_mmap_state mmap_state, int write_combine) { diff --git a/arch/arm/kernel/cpuidle.c b/arch/arm/kernel/cpuidle.c index a44b268e1..7dccc964d 100644 --- a/arch/arm/kernel/cpuidle.c +++ b/arch/arm/kernel/cpuidle.c @@ -47,18 +47,13 @@ int arm_cpuidle_simple_enter(struct cpuidle_device *dev, * This function calls the underlying arch specific low level PM code as * registered at the init time. * - * Returns -EOPNOTSUPP if no suspend callback is defined, the result of the - * callback otherwise. + * Returns the result of the suspend callback. */ int arm_cpuidle_suspend(int index) { - int ret = -EOPNOTSUPP; int cpu = smp_processor_id(); - if (cpuidle_ops[cpu].suspend) - ret = cpuidle_ops[cpu].suspend(index); - - return ret; + return cpuidle_ops[cpu].suspend(index); } /** @@ -92,7 +87,8 @@ static const struct cpuidle_ops *__init arm_cpuidle_get_ops(const char *method) * process. * * Return 0 on sucess, -ENOENT if no 'enable-method' is defined, -EOPNOTSUPP if - * no cpuidle_ops is registered for the 'enable-method'. + * no cpuidle_ops is registered for the 'enable-method', or if either init or + * suspend callback isn't defined. */ static int __init arm_cpuidle_read_ops(struct device_node *dn, int cpu) { @@ -110,6 +106,12 @@ static int __init arm_cpuidle_read_ops(struct device_node *dn, int cpu) return -EOPNOTSUPP; } + if (!ops->init || !ops->suspend) { + pr_warn("cpuidle_ops '%s': no init or suspend callback\n", + enable_method); + return -EOPNOTSUPP; + } + cpuidle_ops[cpu] = *ops; /* structure copy */ pr_notice("cpuidle: enable-method property '%s'" @@ -129,7 +131,8 @@ static int __init arm_cpuidle_read_ops(struct device_node *dn, int cpu) * Returns: * 0 on success, * -ENODEV if it fails to find the cpu node in the device tree, - * -EOPNOTSUPP if it does not find a registered cpuidle_ops for this cpu, + * -EOPNOTSUPP if it does not find a registered and valid cpuidle_ops for + * this cpu, * -ENOENT if it fails to find an 'enable-method' property, * -ENXIO if the HW reports a failure or a misconfiguration, * -ENOMEM if the HW report an memory allocation failure @@ -143,7 +146,7 @@ int __init arm_cpuidle_init(int cpu) return -ENODEV; ret = arm_cpuidle_read_ops(cpu_node, cpu); - if (!ret && cpuidle_ops[cpu].init) + if (!ret) ret = cpuidle_ops[cpu].init(cpu_node, cpu); of_node_put(cpu_node); diff --git a/arch/arm/kernel/devtree.c b/arch/arm/kernel/devtree.c index 2e26016a9..f676febbb 100644 --- a/arch/arm/kernel/devtree.c +++ b/arch/arm/kernel/devtree.c @@ -23,6 +23,7 @@ #include #include #include +#include #include #include #include @@ -87,6 +88,8 @@ void __init arm_dt_init_cpu_maps(void) return; for_each_child_of_node(cpus, cpu) { + const __be32 *cell; + int prop_bytes; u32 hwid; if (of_node_cmp(cpu->type, "cpu")) @@ -98,7 +101,8 @@ void __init arm_dt_init_cpu_maps(void) * properties is considered invalid to build the * cpu_logical_map. */ - if (of_property_read_u32(cpu, "reg", &hwid)) { + cell = of_get_property(cpu, "reg", &prop_bytes); + if (!cell || prop_bytes < sizeof(*cell)) { pr_debug(" * %s missing reg property\n", cpu->full_name); of_node_put(cpu); @@ -106,10 +110,15 @@ void __init arm_dt_init_cpu_maps(void) } /* - * 8 MSBs must be set to 0 in the DT since the reg property + * Bits n:24 must be set to 0 in the DT since the reg property * defines the MPIDR[23:0]. */ - if (hwid & ~MPIDR_HWID_BITMASK) { + do { + hwid = be32_to_cpu(*cell++); + prop_bytes -= sizeof(*cell); + } while (!hwid && prop_bytes > 0); + + if (prop_bytes || (hwid & ~MPIDR_HWID_BITMASK)) { of_node_put(cpu); return; } @@ -213,6 +222,8 @@ const struct machine_desc * __init setup_machine_fdt(unsigned int dt_phys) #if defined(CONFIG_ARCH_MULTIPLATFORM) || defined(CONFIG_ARM_SINGLE_ARMV7M) DT_MACHINE_START(GENERIC_DT, "Generic DT based system") + .l2c_aux_val = 0x0, + .l2c_aux_mask = ~0x0, MACHINE_END mdesc_best = &__mach_desc_GENERIC_DT; diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S index e25505004..9f157e7c5 100644 --- a/arch/arm/kernel/entry-armv.S +++ b/arch/arm/kernel/entry-armv.S @@ -92,7 +92,7 @@ * Invalid mode handlers */ .macro inv_entry, reason - sub sp, sp, #S_FRAME_SIZE + sub sp, sp, #PT_REGS_SIZE ARM( stmib sp, {r1 - lr} ) THUMB( stmia sp, {r0 - r12} ) THUMB( str sp, [sp, #S_SP] ) @@ -152,7 +152,7 @@ ENDPROC(__und_invalid) .macro svc_entry, stack_hole=0, trace=1, uaccess=1 UNWIND(.fnstart ) UNWIND(.save {r0 - pc} ) - sub sp, sp, #(S_FRAME_SIZE + 8 + \stack_hole - 4) + sub sp, sp, #(SVC_REGS_SIZE + \stack_hole - 4) #ifdef CONFIG_THUMB2_KERNEL SPFIX( str r0, [sp] ) @ temporarily saved SPFIX( mov r0, sp ) @@ -167,7 +167,7 @@ ENDPROC(__und_invalid) ldmia r0, {r3 - r5} add r7, sp, #S_SP - 4 @ here for interlock avoidance mov r6, #-1 @ "" "" "" "" - add r2, sp, #(S_FRAME_SIZE + 8 + \stack_hole - 4) + add r2, sp, #(SVC_REGS_SIZE + \stack_hole - 4) SPFIX( addeq r2, r2, #4 ) str r3, [sp, #-4]! @ save the "real" r0 copied @ from the exception stack @@ -185,6 +185,12 @@ ENDPROC(__und_invalid) @ stmia r7, {r2 - r6} + get_thread_info tsk + ldr r0, [tsk, #TI_ADDR_LIMIT] + mov r1, #TASK_SIZE + str r1, [tsk, #TI_ADDR_LIMIT] + str r0, [sp, #SVC_ADDR_LIMIT] + uaccess_save r0 .if \uaccess uaccess_disable r0 @@ -213,7 +219,6 @@ __irq_svc: irq_handler #ifdef CONFIG_PREEMPT - get_thread_info tsk ldr r8, [tsk, #TI_PREEMPT] @ get preempt count ldr r0, [tsk, #TI_FLAGS] @ get flags teq r8, #0 @ if preempt count != 0 @@ -290,6 +295,7 @@ __und_svc_fault: bl __und_fault __und_svc_finish: + get_thread_info tsk ldr r5, [sp, #S_PSR] @ Get SVC cpsr svc_exit r5 @ return from exception UNWIND(.fnend ) @@ -366,17 +372,17 @@ ENDPROC(__fiq_abt) /* * User mode handlers * - * EABI note: sp_svc is always 64-bit aligned here, so should S_FRAME_SIZE + * EABI note: sp_svc is always 64-bit aligned here, so should PT_REGS_SIZE */ -#if defined(CONFIG_AEABI) && (__LINUX_ARM_ARCH__ >= 5) && (S_FRAME_SIZE & 7) +#if defined(CONFIG_AEABI) && (__LINUX_ARM_ARCH__ >= 5) && (PT_REGS_SIZE & 7) #error "sizeof(struct pt_regs) must be a multiple of 8" #endif .macro usr_entry, trace=1, uaccess=1 UNWIND(.fnstart ) UNWIND(.cantunwind ) @ don't unwind the user space - sub sp, sp, #S_FRAME_SIZE + sub sp, sp, #PT_REGS_SIZE ARM( stmib sp, {r1 - r12} ) THUMB( stmia sp, {r0 - r12} ) diff --git a/arch/arm/kernel/entry-common.S b/arch/arm/kernel/entry-common.S index 30a7228ea..10c3283d6 100644 --- a/arch/arm/kernel/entry-common.S +++ b/arch/arm/kernel/entry-common.S @@ -145,7 +145,7 @@ ENTRY(vector_swi) #ifdef CONFIG_CPU_V7M v7m_exception_entry #else - sub sp, sp, #S_FRAME_SIZE + sub sp, sp, #PT_REGS_SIZE stmia sp, {r0 - r12} @ Calling r0 - r12 ARM( add r8, sp, #S_PC ) ARM( stmdb r8, {sp, lr}^ ) @ Calling sp, lr diff --git a/arch/arm/kernel/entry-header.S b/arch/arm/kernel/entry-header.S index 0d22ad206..6391728c8 100644 --- a/arch/arm/kernel/entry-header.S +++ b/arch/arm/kernel/entry-header.S @@ -90,7 +90,7 @@ @ Linux expects to have irqs off. Do it here before taking stack space cpsid i - sub sp, #S_FRAME_SIZE-S_IP + sub sp, #PT_REGS_SIZE-S_IP stmdb sp!, {r0-r11} @ load saved r12, lr, return address and xPSR. @@ -160,7 +160,7 @@ ldmia sp!, {r0-r11} @ restore main sp - add sp, sp, #S_FRAME_SIZE-S_IP + add sp, sp, #PT_REGS_SIZE-S_IP cpsie i bx lr @@ -215,7 +215,9 @@ blne trace_hardirqs_off #endif .endif + ldr r1, [sp, #SVC_ADDR_LIMIT] uaccess_restore + str r1, [tsk, #TI_ADDR_LIMIT] #ifndef CONFIG_THUMB2_KERNEL @ ARM mode SVC restore @@ -259,7 +261,9 @@ @ on the stack remains correct). @ .macro svc_exit_via_fiq + ldr r1, [sp, #SVC_ADDR_LIMIT] uaccess_restore + str r1, [tsk, #TI_ADDR_LIMIT] #ifndef CONFIG_THUMB2_KERNEL @ ARM mode restore mov r0, sp @@ -307,7 +311,7 @@ .endif mov r0, r0 @ ARMv5T and earlier require a nop @ after ldm {}^ - add sp, sp, #\offset + S_FRAME_SIZE + add sp, sp, #\offset + PT_REGS_SIZE movs pc, lr @ return & move spsr_svc into cpsr #elif defined(CONFIG_CPU_V7M) @ V7M restore. @@ -334,7 +338,7 @@ .else ldmdb sp, {r0 - r12} @ get calling r0 - r12 .endif - add sp, sp, #S_FRAME_SIZE - S_SP + add sp, sp, #PT_REGS_SIZE - S_SP movs pc, lr @ return & move spsr_svc into cpsr #endif /* !CONFIG_THUMB2_KERNEL */ .endm diff --git a/arch/arm/kernel/entry-v7m.S b/arch/arm/kernel/entry-v7m.S index 907534f97..abcf47848 100644 --- a/arch/arm/kernel/entry-v7m.S +++ b/arch/arm/kernel/entry-v7m.S @@ -73,7 +73,7 @@ __irq_entry: @ correctness they don't need to be restored. So only r8-r11 must be @ restored here. The easiest way to do so is to restore r0-r7, too. ldmia sp!, {r0-r11} - add sp, #S_FRAME_SIZE-S_IP + add sp, #PT_REGS_SIZE-S_IP cpsie i bx lr ENDPROC(__irq_entry) diff --git a/arch/arm/kernel/hyp-stub.S b/arch/arm/kernel/hyp-stub.S index 0b1e4a93d..15d073ae5 100644 --- a/arch/arm/kernel/hyp-stub.S +++ b/arch/arm/kernel/hyp-stub.S @@ -142,6 +142,19 @@ ARM_BE8(orr r7, r7, #(1 << 25)) @ HSCTLR.EE and r7, #0x1f @ Preserve HPMN mcr p15, 4, r7, c1, c1, 1 @ HDCR + @ Make sure NS-SVC is initialised appropriately + mrc p15, 0, r7, c1, c0, 0 @ SCTLR + orr r7, #(1 << 5) @ CP15 barriers enabled + bic r7, #(3 << 7) @ Clear SED/ITD for v8 (RES0 for v7) + bic r7, #(3 << 19) @ WXN and UWXN disabled + mcr p15, 0, r7, c1, c0, 0 @ SCTLR + + mrc p15, 0, r7, c0, c0, 0 @ MIDR + mcr p15, 4, r7, c0, c0, 0 @ VPIDR + + mrc p15, 0, r7, c0, c0, 5 @ MPIDR + mcr p15, 4, r7, c0, c0, 5 @ VMPIDR + #if !defined(ZIMAGE) && defined(CONFIG_ARM_ARCH_TIMER) @ make CNTP_* and CNTPCT accessible from PL1 mrc p15, 0, r7, c0, c1, 1 @ ID_PFR1 diff --git a/arch/arm/kernel/machine_kexec.c b/arch/arm/kernel/machine_kexec.c index 59fd0e24c..b18c1ea56 100644 --- a/arch/arm/kernel/machine_kexec.c +++ b/arch/arm/kernel/machine_kexec.c @@ -57,7 +57,7 @@ int machine_kexec_prepare(struct kimage *image) for (i = 0; i < image->nr_segments; i++) { current_segment = &image->segment[i]; - if (!memblock_is_region_memory(current_segment->mem, + if (!memblock_is_region_memory(idmap_to_phys(current_segment->mem), current_segment->memsz)) return -EINVAL; diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c index 4a803c5a1..612eb530f 100644 --- a/arch/arm/kernel/process.c +++ b/arch/arm/kernel/process.c @@ -96,19 +96,23 @@ void __show_regs(struct pt_regs *regs) unsigned long flags; char buf[64]; #ifndef CONFIG_CPU_V7M - unsigned int domain; + unsigned int domain, fs; #ifdef CONFIG_CPU_SW_DOMAIN_PAN /* * Get the domain register for the parent context. In user * mode, we don't save the DACR, so lets use what it should * be. For other modes, we place it after the pt_regs struct. */ - if (user_mode(regs)) + if (user_mode(regs)) { domain = DACR_UACCESS_ENABLE; - else - domain = *(unsigned int *)(regs + 1); + fs = get_fs(); + } else { + domain = to_svc_pt_regs(regs)->dacr; + fs = to_svc_pt_regs(regs)->addr_limit; + } #else domain = get_domain(); + fs = get_fs(); #endif #endif @@ -144,7 +148,7 @@ void __show_regs(struct pt_regs *regs) if ((domain & domain_mask(DOMAIN_USER)) == domain_val(DOMAIN_USER, DOMAIN_NOACCESS)) segment = "none"; - else if (get_fs() == get_ds()) + else if (fs == get_ds()) segment = "kernel"; else segment = "user"; diff --git a/arch/arm/kernel/ptrace.c b/arch/arm/kernel/ptrace.c index 4d9375814..ce131ed59 100644 --- a/arch/arm/kernel/ptrace.c +++ b/arch/arm/kernel/ptrace.c @@ -932,18 +932,19 @@ asmlinkage int syscall_trace_enter(struct pt_regs *regs, int scno) { current_thread_info()->syscall = scno; - /* Do the secure computing check first; failures should be fast. */ + if (test_thread_flag(TIF_SYSCALL_TRACE)) + tracehook_report_syscall(regs, PTRACE_SYSCALL_ENTER); + + /* Do seccomp after ptrace; syscall may have changed. */ #ifdef CONFIG_HAVE_ARCH_SECCOMP_FILTER - if (secure_computing() == -1) + if (secure_computing(NULL) == -1) return -1; #else /* XXX: remove this once OABI gets fixed */ - secure_computing_strict(scno); + secure_computing_strict(current_thread_info()->syscall); #endif - if (test_thread_flag(TIF_SYSCALL_TRACE)) - tracehook_report_syscall(regs, PTRACE_SYSCALL_ENTER); - + /* Tracer or seccomp may have changed syscall. */ scno = current_thread_info()->syscall; if (test_thread_flag(TIF_SYSCALL_TRACEPOINT)) diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c index 7b5350060..df7f2a75e 100644 --- a/arch/arm/kernel/setup.c +++ b/arch/arm/kernel/setup.c @@ -19,7 +19,6 @@ #include #include #include -#include #include #include #include @@ -844,15 +843,34 @@ static void __init request_standard_resources(const struct machine_desc *mdesc) struct resource *res; kernel_code.start = virt_to_phys(_text); - kernel_code.end = virt_to_phys(_etext - 1); + kernel_code.end = virt_to_phys(__init_begin - 1); kernel_data.start = virt_to_phys(_sdata); kernel_data.end = virt_to_phys(_end - 1); for_each_memblock(memory, region) { + phys_addr_t start = __pfn_to_phys(memblock_region_memory_base_pfn(region)); + phys_addr_t end = __pfn_to_phys(memblock_region_memory_end_pfn(region)) - 1; + unsigned long boot_alias_start; + + /* + * Some systems have a special memory alias which is only + * used for booting. We need to advertise this region to + * kexec-tools so they know where bootable RAM is located. + */ + boot_alias_start = phys_to_idmap(start); + if (arm_has_idmap_alias() && boot_alias_start != IDMAP_INVALID_ADDR) { + res = memblock_virt_alloc(sizeof(*res), 0); + res->name = "System RAM (boot alias)"; + res->start = boot_alias_start; + res->end = phys_to_idmap(end); + res->flags = IORESOURCE_MEM | IORESOURCE_BUSY; + request_resource(&iomem_resource, res); + } + res = memblock_virt_alloc(sizeof(*res), 0); res->name = "System RAM"; - res->start = __pfn_to_phys(memblock_region_memory_base_pfn(region)); - res->end = __pfn_to_phys(memblock_region_memory_end_pfn(region)) - 1; + res->start = start; + res->end = end; res->flags = IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY; request_resource(&iomem_resource, res); @@ -903,14 +921,9 @@ static int __init customize_machine(void) * machine from the device tree, if no callback is provided, * otherwise we would always need an init_machine callback. */ - of_iommu_init(); if (machine_desc->init_machine) machine_desc->init_machine(); -#ifdef CONFIG_OF - else - of_platform_populate(NULL, of_default_bus_match_table, - NULL, NULL); -#endif + return 0; } arch_initcall(customize_machine); @@ -1006,9 +1019,25 @@ static void __init reserve_crashkernel(void) (unsigned long)(crash_base >> 20), (unsigned long)(total_mem >> 20)); + /* The crashk resource must always be located in normal mem */ crashk_res.start = crash_base; crashk_res.end = crash_base + crash_size - 1; insert_resource(&iomem_resource, &crashk_res); + + if (arm_has_idmap_alias()) { + /* + * If we have a special RAM alias for use at boot, we + * need to advertise to kexec tools where the alias is. + */ + static struct resource crashk_boot_res = { + .name = "Crash kernel (boot alias)", + .flags = IORESOURCE_BUSY | IORESOURCE_MEM, + }; + + crashk_boot_res.start = phys_to_idmap(crash_base); + crashk_boot_res.end = crashk_boot_res.start + crash_size - 1; + insert_resource(&iomem_resource, &crashk_boot_res); + } } #else static inline void reserve_crashkernel(void) {} @@ -1064,6 +1093,7 @@ void __init setup_arch(char **cmdline_p) early_paging_init(mdesc); #endif setup_dma_zone(mdesc); + xen_early_init(); efi_init(); sanity_check_meminfo(); arm_memblock_init(mdesc); @@ -1080,7 +1110,6 @@ void __init setup_arch(char **cmdline_p) arm_dt_init_cpu_maps(); psci_dt_init(); - xen_early_init(); #ifdef CONFIG_SMP if (is_smp()) { if (!mdesc->smp_init || !mdesc->smp_init()) { diff --git a/arch/arm/kernel/smp_tlb.c b/arch/arm/kernel/smp_tlb.c index 2e72be4f6..22313cb53 100644 --- a/arch/arm/kernel/smp_tlb.c +++ b/arch/arm/kernel/smp_tlb.c @@ -93,17 +93,53 @@ void erratum_a15_798181_init(void) unsigned int revidr = read_cpuid(CPUID_REVIDR); /* Brahma-B15 r0p0..r0p2 affected - * Cortex-A15 r0p0..r3p2 w/o ECO fix affected */ - if ((midr & 0xff0ffff0) == 0x420f00f0 && midr <= 0x420f00f2) + * Cortex-A15 r0p0..r3p3 w/o ECO fix affected + * Fixes applied to A15 with respect to the revision and revidr are: + * + * r0p0-r2p1: No fixes applied + * r2p2,r2p3: + * REVIDR[4]: 798181 Moving a virtual page that is being accessed + * by an active process can lead to unexpected behavior + * REVIDR[9]: Not defined + * r2p4,r3p0,r3p1,r3p2: + * REVIDR[4]: 798181 Moving a virtual page that is being accessed + * by an active process can lead to unexpected behavior + * REVIDR[9]: 798181 Moving a virtual page that is being accessed + * by an active process can lead to unexpected behavior + * - This is an update to a previously released ECO. + * r3p3: + * REVIDR[4]: Reserved + * REVIDR[9]: 798181 Moving a virtual page that is being accessed + * by an active process can lead to unexpected behavior + * - This is an update to a previously released ECO. + * + * Handling: + * REVIDR[9] set -> No WA + * REVIDR[4] set, REVIDR[9] cleared -> Partial WA + * Both cleared -> Full WA + */ + if ((midr & 0xff0ffff0) == 0x420f00f0 && midr <= 0x420f00f2) { erratum_a15_798181_handler = erratum_a15_798181_broadcast; - else if ((midr & 0xff0ffff0) == 0x410fc0f0 && midr <= 0x413fc0f2 && - (revidr & 0x210) != 0x210) { + } else if ((midr & 0xff0ffff0) == 0x410fc0f0 && midr < 0x412fc0f2) { + erratum_a15_798181_handler = erratum_a15_798181_broadcast; + } else if ((midr & 0xff0ffff0) == 0x410fc0f0 && midr < 0x412fc0f4) { if (revidr & 0x10) erratum_a15_798181_handler = erratum_a15_798181_partial; else erratum_a15_798181_handler = erratum_a15_798181_broadcast; + } else if ((midr & 0xff0ffff0) == 0x410fc0f0 && midr < 0x413fc0f3) { + if ((revidr & 0x210) == 0) + erratum_a15_798181_handler = + erratum_a15_798181_broadcast; + else if (revidr & 0x10) + erratum_a15_798181_handler = + erratum_a15_798181_partial; + } else if ((midr & 0xff0ffff0) == 0x410fc0f0 && midr < 0x414fc0f0) { + if ((revidr & 0x200) == 0) + erratum_a15_798181_handler = + erratum_a15_798181_partial; } } #endif diff --git a/arch/arm/kernel/smp_twd.c b/arch/arm/kernel/smp_twd.c index 1bfa7a7f5..02d5e5e8d 100644 --- a/arch/arm/kernel/smp_twd.c +++ b/arch/arm/kernel/smp_twd.c @@ -310,24 +310,17 @@ static void twd_timer_setup(void) enable_percpu_irq(clk->irq, 0); } -static int twd_timer_cpu_notify(struct notifier_block *self, - unsigned long action, void *hcpu) +static int twd_timer_starting_cpu(unsigned int cpu) { - switch (action & ~CPU_TASKS_FROZEN) { - case CPU_STARTING: - twd_timer_setup(); - break; - case CPU_DYING: - twd_timer_stop(); - break; - } - - return NOTIFY_OK; + twd_timer_setup(); + return 0; } -static struct notifier_block twd_timer_cpu_nb = { - .notifier_call = twd_timer_cpu_notify, -}; +static int twd_timer_dying_cpu(unsigned int cpu) +{ + twd_timer_stop(); + return 0; +} static int __init twd_local_timer_common_register(struct device_node *np) { @@ -345,9 +338,9 @@ static int __init twd_local_timer_common_register(struct device_node *np) goto out_free; } - err = register_cpu_notifier(&twd_timer_cpu_nb); - if (err) - goto out_irq; + cpuhp_setup_state_nocalls(CPUHP_AP_ARM_TWD_STARTING, + "AP_ARM_TWD_STARTING", + twd_timer_starting_cpu, twd_timer_dying_cpu); twd_get_clock(np); if (!of_property_read_bool(np, "always-on")) @@ -365,8 +358,6 @@ static int __init twd_local_timer_common_register(struct device_node *np) return 0; -out_irq: - free_percpu_irq(twd_ppi, twd_evt); out_free: iounmap(twd_base); twd_base = NULL; @@ -390,7 +381,7 @@ int __init twd_local_timer_register(struct twd_local_timer *tlt) } #ifdef CONFIG_OF -static void __init twd_local_timer_of_register(struct device_node *np) +static int __init twd_local_timer_of_register(struct device_node *np) { int err; @@ -410,6 +401,7 @@ static void __init twd_local_timer_of_register(struct device_node *np) out: WARN(err, "twd_local_timer_of_register failed (%d)\n", err); + return err; } CLOCKSOURCE_OF_DECLARE(arm_twd_a9, "arm,cortex-a9-twd-timer", twd_local_timer_of_register); CLOCKSOURCE_OF_DECLARE(arm_twd_a5, "arm,cortex-a5-twd-timer", twd_local_timer_of_register); diff --git a/arch/arm/kernel/vmlinux.lds.S b/arch/arm/kernel/vmlinux.lds.S index e2c6da096..d24e5dd2a 100644 --- a/arch/arm/kernel/vmlinux.lds.S +++ b/arch/arm/kernel/vmlinux.lds.S @@ -44,7 +44,7 @@ #endif #if (defined(CONFIG_SMP_ON_UP) && !defined(CONFIG_DEBUG_SPINLOCK)) || \ - defined(CONFIG_GENERIC_BUG) + defined(CONFIG_GENERIC_BUG) || defined(CONFIG_JUMP_LABEL) #define ARM_EXIT_KEEP(x) x #define ARM_EXIT_DISCARD(x) #else @@ -125,6 +125,8 @@ SECTIONS #ifdef CONFIG_DEBUG_ALIGN_RODATA . = ALIGN(1<