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-rw-r--r--target/linux/generic/patches-3.0/330-mips-add-crash-and-kdump-support.patch616
1 files changed, 0 insertions, 616 deletions
diff --git a/target/linux/generic/patches-3.0/330-mips-add-crash-and-kdump-support.patch b/target/linux/generic/patches-3.0/330-mips-add-crash-and-kdump-support.patch
deleted file mode 100644
index 28621c4572..0000000000
--- a/target/linux/generic/patches-3.0/330-mips-add-crash-and-kdump-support.patch
+++ /dev/null
@@ -1,616 +0,0 @@
-From eee16330c9de9adf7880cce9f1d32e13f89706bb Mon Sep 17 00:00:00 2001
-From: Wu Zhangjin <wuzhangjin@gmail.com>
-Date: Tue, 11 Jan 2011 13:16:47 +0000
-Subject: MIPS: Add crash and kdump support
-
-From: http://patchwork.linux-mips.org/patch/1025/
-
-Hello folks,
-
-Please find here MIPS crash and kdump patches.
-This is patch set of 3 patches:
-1. generic MIPS changes (kernel);
-2. MIPS Cavium Octeon board kexec/kdump code (kernel);
-3. Kexec user space MIPS changes.
-
-Patches were tested on the latest linux-mips@ git kernel and the latest
-kexec-tools git on Cavium Octeon 50xx board.
-
-I also made the same code working on RMI XLR/XLS boards for both
-mips32 and mips64 kernels.
-
-Best regards,
-Maxim Uvarov.
-
-------
-[ Zhangjin: Several trivial building failure has been fixed.
-
-Note: the 2nd patch can not be cleanly applied, but may be a good
-reference for the other board development:
-
- + MIPS Cavium Octeon board kexec,kdump support
- http://patchwork.linux-mips.org/patch/1026/
-
-And the 3rd patch has already been merged into the mainline kexec-tools:
-
- + some kexec MIPS improvements
- http://patchwork.linux-mips.org/patch/1027/
-
-kexec-tools is available here:
-
- + http://horms.net/projects/kexec/
- git://git.kernel.org/pub/scm/utils/kernel/kexec/kexec-tools.git
-]
-Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
----
-(limited to 'arch/mips/kernel')
-
---- a/arch/mips/kernel/Makefile
-+++ b/arch/mips/kernel/Makefile
-@@ -93,7 +93,8 @@ obj-$(CONFIG_I8253) += i8253.o
-
- obj-$(CONFIG_GPIO_TXX9) += gpio_txx9.o
-
--obj-$(CONFIG_KEXEC) += machine_kexec.o relocate_kernel.o
-+obj-$(CONFIG_KEXEC) += machine_kexec.o relocate_kernel.o crash.o
-+obj-$(CONFIG_CRASH_DUMP) += crash_dump.o
- obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
- obj-$(CONFIG_SPINLOCK_TEST) += spinlock_test.o
- obj-$(CONFIG_MIPS_MACHINE) += mips_machine.o
---- /dev/null
-+++ b/arch/mips/kernel/crash.c
-@@ -0,0 +1,75 @@
-+#include <linux/kernel.h>
-+#include <linux/smp.h>
-+#include <linux/reboot.h>
-+#include <linux/kexec.h>
-+#include <linux/bootmem.h>
-+#include <linux/crash_dump.h>
-+#include <linux/delay.h>
-+#include <linux/init.h>
-+#include <linux/irq.h>
-+#include <linux/types.h>
-+#include <linux/sched.h>
-+
-+#ifdef CONFIG_CRASH_DUMP
-+unsigned long long elfcorehdr_addr = ELFCORE_ADDR_MAX;
-+#endif
-+
-+/* This keeps a track of which one is crashing cpu. */
-+int crashing_cpu = -1;
-+static cpumask_t cpus_in_crash = CPU_MASK_NONE;
-+
-+#ifdef CONFIG_SMP
-+void crash_shutdown_secondary(void *ignore)
-+{
-+ struct pt_regs *regs;
-+ int cpu = smp_processor_id();
-+
-+ regs = task_pt_regs(current);
-+
-+ if (!cpu_online(cpu))
-+ return;
-+
-+ local_irq_disable();
-+ if (!cpu_isset(cpu, cpus_in_crash))
-+ crash_save_cpu(regs, cpu);
-+ cpu_set(cpu, cpus_in_crash);
-+
-+ while (!atomic_read(&kexec_ready_to_reboot))
-+ cpu_relax();
-+ relocated_kexec_smp_wait(NULL);
-+ /* NOTREACHED */
-+}
-+
-+static void crash_kexec_prepare_cpus(void)
-+{
-+ unsigned int msecs;
-+
-+ unsigned int ncpus = num_online_cpus() - 1;/* Excluding the panic cpu */
-+
-+ dump_send_ipi(crash_shutdown_secondary);
-+ smp_wmb();
-+
-+ /*
-+ * The crash CPU sends an IPI and wait for other CPUs to
-+ * respond. Delay of at least 10 seconds.
-+ */
-+ printk(KERN_EMERG "Sending IPI to other cpus...\n");
-+ msecs = 10000;
-+ while ((cpus_weight(cpus_in_crash) < ncpus) && (--msecs > 0)) {
-+ cpu_relax();
-+ mdelay(1);
-+ }
-+}
-+
-+#else
-+static void crash_kexec_prepare_cpus(void) {}
-+#endif
-+
-+void default_machine_crash_shutdown(struct pt_regs *regs)
-+{
-+ local_irq_disable();
-+ crashing_cpu = smp_processor_id();
-+ crash_save_cpu(regs, crashing_cpu);
-+ crash_kexec_prepare_cpus();
-+ cpu_set(crashing_cpu, cpus_in_crash);
-+}
---- /dev/null
-+++ b/arch/mips/kernel/crash_dump.c
-@@ -0,0 +1,86 @@
-+#include <linux/highmem.h>
-+#include <linux/bootmem.h>
-+#include <linux/crash_dump.h>
-+#include <asm/uaccess.h>
-+
-+#ifdef CONFIG_PROC_VMCORE
-+static int __init parse_elfcorehdr(char *p)
-+{
-+ if (p)
-+ elfcorehdr_addr = memparse(p, &p);
-+ return 1;
-+}
-+__setup("elfcorehdr=", parse_elfcorehdr);
-+#endif
-+
-+static int __init parse_savemaxmem(char *p)
-+{
-+ if (p)
-+ saved_max_pfn = (memparse(p, &p) >> PAGE_SHIFT) - 1;
-+
-+ return 1;
-+}
-+__setup("savemaxmem=", parse_savemaxmem);
-+
-+
-+static void *kdump_buf_page;
-+
-+/**
-+ * copy_oldmem_page - copy one page from "oldmem"
-+ * @pfn: page frame number to be copied
-+ * @buf: target memory address for the copy; this can be in kernel address
-+ * space or user address space (see @userbuf)
-+ * @csize: number of bytes to copy
-+ * @offset: offset in bytes into the page (based on pfn) to begin the copy
-+ * @userbuf: if set, @buf is in user address space, use copy_to_user(),
-+ * otherwise @buf is in kernel address space, use memcpy().
-+ *
-+ * Copy a page from "oldmem". For this page, there is no pte mapped
-+ * in the current kernel.
-+ *
-+ * Calling copy_to_user() in atomic context is not desirable. Hence first
-+ * copying the data to a pre-allocated kernel page and then copying to user
-+ * space in non-atomic context.
-+ */
-+ssize_t copy_oldmem_page(unsigned long pfn, char *buf,
-+ size_t csize, unsigned long offset, int userbuf)
-+{
-+ void *vaddr;
-+
-+ if (!csize)
-+ return 0;
-+
-+ vaddr = kmap_atomic_pfn(pfn, KM_PTE0);
-+
-+ if (!userbuf) {
-+ memcpy(buf, (vaddr + offset), csize);
-+ kunmap_atomic(vaddr, KM_PTE0);
-+ } else {
-+ if (!kdump_buf_page) {
-+ printk(KERN_WARNING "Kdump: Kdump buffer page not"
-+ " allocated\n");
-+ return -EFAULT;
-+ }
-+ copy_page(kdump_buf_page, vaddr);
-+ kunmap_atomic(vaddr, KM_PTE0);
-+ if (copy_to_user(buf, (kdump_buf_page + offset), csize))
-+ return -EFAULT;
-+ }
-+
-+ return csize;
-+}
-+
-+static int __init kdump_buf_page_init(void)
-+{
-+ int ret = 0;
-+
-+ kdump_buf_page = kmalloc(PAGE_SIZE, GFP_KERNEL);
-+ if (!kdump_buf_page) {
-+ printk(KERN_WARNING "Kdump: Failed to allocate kdump buffer"
-+ " page\n");
-+ ret = -ENOMEM;
-+ }
-+
-+ return ret;
-+}
-+arch_initcall(kdump_buf_page_init);
---- a/arch/mips/kernel/machine_kexec.c
-+++ b/arch/mips/kernel/machine_kexec.c
-@@ -19,9 +19,19 @@ extern const size_t relocate_new_kernel_
- extern unsigned long kexec_start_address;
- extern unsigned long kexec_indirection_page;
-
-+int (*_machine_kexec_prepare)(struct kimage *) = NULL;
-+void (*_machine_kexec_shutdown)(void) = NULL;
-+void (*_machine_crash_shutdown)(struct pt_regs *regs) = NULL;
-+#ifdef CONFIG_SMP
-+void (*relocated_kexec_smp_wait) (void *);
-+atomic_t kexec_ready_to_reboot = ATOMIC_INIT(0);
-+#endif
-+
- int
- machine_kexec_prepare(struct kimage *kimage)
- {
-+ if (_machine_kexec_prepare)
-+ return _machine_kexec_prepare(kimage);
- return 0;
- }
-
-@@ -33,11 +43,17 @@ machine_kexec_cleanup(struct kimage *kim
- void
- machine_shutdown(void)
- {
-+ if (_machine_kexec_shutdown)
-+ _machine_kexec_shutdown();
- }
-
- void
- machine_crash_shutdown(struct pt_regs *regs)
- {
-+ if (_machine_crash_shutdown)
-+ _machine_crash_shutdown(regs);
-+ else
-+ default_machine_crash_shutdown(regs);
- }
-
- typedef void (*noretfun_t)(void) __attribute__((noreturn));
-@@ -52,7 +68,9 @@ machine_kexec(struct kimage *image)
- reboot_code_buffer =
- (unsigned long)page_address(image->control_code_page);
-
-- kexec_start_address = (unsigned long) phys_to_virt(image->start);
-+ kexec_start_address =
-+ (unsigned long) phys_to_virt(image->start);
-+
- kexec_indirection_page =
- (unsigned long) phys_to_virt(image->head & PAGE_MASK);
-
-@@ -63,7 +81,7 @@ machine_kexec(struct kimage *image)
- * The generic kexec code builds a page list with physical
- * addresses. they are directly accessible through KSEG0 (or
- * CKSEG0 or XPHYS if on 64bit system), hence the
-- * pys_to_virt() call.
-+ * phys_to_virt() call.
- */
- for (ptr = &image->head; (entry = *ptr) && !(entry &IND_DONE);
- ptr = (entry & IND_INDIRECTION) ?
-@@ -81,5 +99,13 @@ machine_kexec(struct kimage *image)
- printk("Will call new kernel at %08lx\n", image->start);
- printk("Bye ...\n");
- __flush_cache_all();
-+#ifdef CONFIG_SMP
-+ /* All secondary cpus now may jump to kexec_wait cycle */
-+ relocated_kexec_smp_wait = reboot_code_buffer +
-+ (void *)(kexec_smp_wait - relocate_new_kernel);
-+ smp_wmb();
-+ atomic_set(&kexec_ready_to_reboot, 1);
-+#endif
- ((noretfun_t) reboot_code_buffer)();
- }
-+
---- a/arch/mips/kernel/relocate_kernel.S
-+++ b/arch/mips/kernel/relocate_kernel.S
-@@ -15,6 +15,11 @@
- #include <asm/addrspace.h>
-
- LEAF(relocate_new_kernel)
-+ PTR_L a0, arg0
-+ PTR_L a1, arg1
-+ PTR_L a2, arg2
-+ PTR_L a3, arg3
-+
- PTR_L s0, kexec_indirection_page
- PTR_L s1, kexec_start_address
-
-@@ -26,7 +31,6 @@ process_entry:
- and s3, s2, 0x1
- beq s3, zero, 1f
- and s4, s2, ~0x1 /* store destination addr in s4 */
-- move a0, s4
- b process_entry
-
- 1:
-@@ -60,23 +64,100 @@ copy_word:
- b process_entry
-
- done:
-+#ifdef CONFIG_SMP
-+ /* kexec_flag reset is signal to other CPUs what kernel
-+ was moved to it's location. Note - we need relocated address
-+ of kexec_flag. */
-+
-+ bal 1f
-+ 1: move t1,ra;
-+ PTR_LA t2,1b
-+ PTR_LA t0,kexec_flag
-+ PTR_SUB t0,t0,t2;
-+ PTR_ADD t0,t1,t0;
-+ LONG_S zero,(t0)
-+#endif
-+
-+ sync
- /* jump to kexec_start_address */
- j s1
- END(relocate_new_kernel)
-
--kexec_start_address:
-- EXPORT(kexec_start_address)
-+#ifdef CONFIG_SMP
-+/*
-+ * Other CPUs should wait until code is relocated and
-+ * then start at entry (?) point.
-+ */
-+LEAF(kexec_smp_wait)
-+ PTR_L a0, s_arg0
-+ PTR_L a1, s_arg1
-+ PTR_L a2, s_arg2
-+ PTR_L a3, s_arg3
-+ PTR_L s1, kexec_start_address
-+
-+ /* Non-relocated address works for args and kexec_start_address ( old
-+ * kernel is not overwritten). But we need relocated address of
-+ * kexec_flag.
-+ */
-+
-+ bal 1f
-+1: move t1,ra;
-+ PTR_LA t2,1b
-+ PTR_LA t0,kexec_flag
-+ PTR_SUB t0,t0,t2;
-+ PTR_ADD t0,t1,t0;
-+
-+1: LONG_L s0, (t0)
-+ bne s0, zero,1b
-+
-+ sync
-+ j s1
-+ END(kexec_smp_wait)
-+#endif
-+
-+#ifdef __mips64
-+ /* all PTR's must be aligned to 8 byte in 64-bit mode */
-+ .align 3
-+#endif
-+
-+/* All parameters to new kernel are passed in registers a0-a3.
-+ * kexec_args[0..3] are uses to prepare register values.
-+ */
-+
-+EXPORT(kexec_args)
-+arg0: PTR 0x0
-+arg1: PTR 0x0
-+arg2: PTR 0x0
-+arg3: PTR 0x0
-+ .size kexec_args,PTRSIZE*4
-+
-+#ifdef CONFIG_SMP
-+/*
-+ * Secondary CPUs may have different kernel parameters in
-+ * their registers a0-a3. secondary_kexec_args[0..3] are used
-+ * to prepare register values.
-+ */
-+EXPORT(secondary_kexec_args)
-+s_arg0: PTR 0x0
-+s_arg1: PTR 0x0
-+s_arg2: PTR 0x0
-+s_arg3: PTR 0x0
-+ .size secondary_kexec_args,PTRSIZE*4
-+kexec_flag:
-+ LONG 0x1
-+
-+#endif
-+
-+EXPORT(kexec_start_address)
- PTR 0x0
- .size kexec_start_address, PTRSIZE
-
--kexec_indirection_page:
-- EXPORT(kexec_indirection_page)
-+EXPORT(kexec_indirection_page)
- PTR 0
- .size kexec_indirection_page, PTRSIZE
-
- relocate_new_kernel_end:
-
--relocate_new_kernel_size:
-- EXPORT(relocate_new_kernel_size)
-+EXPORT(relocate_new_kernel_size)
- PTR relocate_new_kernel_end - relocate_new_kernel
- .size relocate_new_kernel_size, PTRSIZE
---- a/arch/mips/kernel/setup.c
-+++ b/arch/mips/kernel/setup.c
-@@ -21,6 +21,7 @@
- #include <linux/console.h>
- #include <linux/pfn.h>
- #include <linux/debugfs.h>
-+#include <linux/kexec.h>
-
- #include <asm/addrspace.h>
- #include <asm/bootinfo.h>
-@@ -488,12 +489,62 @@ static void __init arch_mem_init(char **
- }
-
- bootmem_init();
-+#ifdef CONFIG_KEXEC
-+ if (crashk_res.start != crashk_res.end)
-+ reserve_bootmem(crashk_res.start,
-+ crashk_res.end - crashk_res.start + 1,
-+ BOOTMEM_DEFAULT);
-+#endif
- device_tree_init();
- sparse_init();
- plat_swiotlb_setup();
- paging_init();
- }
-
-+#ifdef CONFIG_KEXEC
-+static inline unsigned long long get_total_mem(void)
-+{
-+ unsigned long long total;
-+ total = max_pfn - min_low_pfn;
-+ return total << PAGE_SHIFT;
-+}
-+
-+static void __init mips_parse_crashkernel(void)
-+{
-+ unsigned long long total_mem;
-+ unsigned long long crash_size, crash_base;
-+ int ret;
-+
-+ total_mem = get_total_mem();
-+ ret = parse_crashkernel(boot_command_line, total_mem,
-+ &crash_size, &crash_base);
-+ if (ret != 0 || crash_size <= 0)
-+ return;
-+
-+ crashk_res.start = crash_base;
-+ crashk_res.end = crash_base + crash_size - 1;
-+}
-+static void __init request_crashkernel(struct resource *res)
-+{
-+ int ret;
-+
-+ ret = request_resource(res, &crashk_res);
-+ if (!ret)
-+ printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
-+ "for crashkernel\n",
-+ (unsigned long)((crashk_res.end -
-+ crashk_res.start + 1) >> 20),
-+ (unsigned long)(crashk_res.start >> 20));
-+}
-+#else
-+static void __init mips_parse_crashkernel(void)
-+{
-+}
-+static void __init request_crashkernel(struct resource *res)
-+{
-+}
-+#endif
-+
- static void __init resource_init(void)
- {
- int i;
-@@ -509,6 +560,8 @@ static void __init resource_init(void)
- /*
- * Request address space for all standard RAM.
- */
-+ mips_parse_crashkernel();
-+
- for (i = 0; i < boot_mem_map.nr_map; i++) {
- struct resource *res;
- unsigned long start, end;
-@@ -544,6 +597,7 @@ static void __init resource_init(void)
- */
- request_resource(res, &code_resource);
- request_resource(res, &data_resource);
-+ request_crashkernel(res);
- }
- }
-
---- a/arch/mips/kernel/smp.c
-+++ b/arch/mips/kernel/smp.c
-@@ -433,3 +433,21 @@ void flush_tlb_one(unsigned long vaddr)
-
- EXPORT_SYMBOL(flush_tlb_page);
- EXPORT_SYMBOL(flush_tlb_one);
-+
-+#if defined(CONFIG_KEXEC)
-+void (*dump_ipi_function_ptr)(void *) = NULL;
-+void dump_send_ipi(void (*dump_ipi_callback)(void *))
-+{
-+ int i;
-+ int cpu = smp_processor_id();
-+
-+ dump_ipi_function_ptr = dump_ipi_callback;
-+ smp_mb();
-+ for_each_online_cpu(i)
-+ if (i != cpu)
-+ core_send_ipi(i, SMP_DUMP);
-+
-+}
-+EXPORT_SYMBOL(dump_send_ipi);
-+#endif
-+
---- a/arch/mips/include/asm/kexec.h
-+++ b/arch/mips/include/asm/kexec.h
-@@ -9,22 +9,45 @@
- #ifndef _MIPS_KEXEC
- # define _MIPS_KEXEC
-
-+#include <asm/stacktrace.h>
-+
-+extern unsigned long long elfcorehdr_addr;
-+
- /* Maximum physical address we can use pages from */
- #define KEXEC_SOURCE_MEMORY_LIMIT (0x20000000)
- /* Maximum address we can reach in physical address mode */
- #define KEXEC_DESTINATION_MEMORY_LIMIT (0x20000000)
- /* Maximum address we can use for the control code buffer */
- #define KEXEC_CONTROL_MEMORY_LIMIT (0x20000000)
--
--#define KEXEC_CONTROL_PAGE_SIZE 4096
-+/* Reserve 3*4096 bytes for board-specific info */
-+#define KEXEC_CONTROL_PAGE_SIZE (4096 + 3*4096)
-
- /* The native architecture */
- #define KEXEC_ARCH KEXEC_ARCH_MIPS
-+#define MAX_NOTE_BYTES 1024
-
- static inline void crash_setup_regs(struct pt_regs *newregs,
-- struct pt_regs *oldregs)
-+ struct pt_regs *oldregs)
- {
-- /* Dummy implementation for now */
-+ if (oldregs)
-+ memcpy(newregs, oldregs, sizeof(*newregs));
-+ else
-+ prepare_frametrace(newregs);
- }
-
-+#ifdef CONFIG_KEXEC
-+struct kimage;
-+extern unsigned long kexec_args[4];
-+extern int (*_machine_kexec_prepare)(struct kimage *);
-+extern void (*_machine_kexec_shutdown)(void);
-+extern void (*_machine_crash_shutdown)(struct pt_regs *regs);
-+extern void default_machine_crash_shutdown(struct pt_regs *regs);
-+#ifdef CONFIG_SMP
-+extern const unsigned char kexec_smp_wait[];
-+extern unsigned long secondary_kexec_args[4];
-+extern void (*relocated_kexec_smp_wait) (void *);
-+extern atomic_t kexec_ready_to_reboot;
-+#endif
-+#endif
-+
- #endif /* !_MIPS_KEXEC */
---- a/arch/mips/include/asm/smp.h
-+++ b/arch/mips/include/asm/smp.h
-@@ -40,6 +40,8 @@ extern int __cpu_logical_map[NR_CPUS];
- #define SMP_CALL_FUNCTION 0x2
- /* Octeon - Tell another core to flush its icache */
- #define SMP_ICACHE_FLUSH 0x4
-+/* Used by kexec crashdump to save all cpu's state */
-+#define SMP_DUMP 0x8
-
- extern volatile cpumask_t cpu_callin_map;
-
-@@ -91,4 +93,9 @@ static inline void arch_send_call_functi
- mp_ops->send_ipi_mask(mask, SMP_CALL_FUNCTION);
- }
-
-+extern void core_send_ipi(int cpu, unsigned int action);
-+#if defined(CONFIG_KEXEC)
-+extern void (*dump_ipi_function_ptr)(void *);
-+void dump_send_ipi(void (*dump_ipi_callback)(void *));
-+#endif
- #endif /* __ASM_SMP_H */
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