diff options
Diffstat (limited to 'arch/powerpc/platforms/pseries')
| -rw-r--r-- | arch/powerpc/platforms/pseries/Makefile | 1 | ||||
| -rw-r--r-- | arch/powerpc/platforms/pseries/eeh.c | 5 | ||||
| -rw-r--r-- | arch/powerpc/platforms/pseries/lpar.c | 15 | ||||
| -rw-r--r-- | arch/powerpc/platforms/pseries/pci_dlpar.c | 2 | ||||
| -rw-r--r-- | arch/powerpc/platforms/pseries/phyp_dump.c | 498 | ||||
| -rw-r--r-- | arch/powerpc/platforms/pseries/reconfig.c | 12 | ||||
| -rw-r--r-- | arch/powerpc/platforms/pseries/scanlog.c | 37 | ||||
| -rw-r--r-- | arch/powerpc/platforms/pseries/setup.c | 4 |
8 files changed, 545 insertions, 29 deletions
diff --git a/arch/powerpc/platforms/pseries/Makefile b/arch/powerpc/platforms/pseries/Makefile index 992ba67..bdae04b 100644 --- a/arch/powerpc/platforms/pseries/Makefile +++ b/arch/powerpc/platforms/pseries/Makefile @@ -18,3 +18,4 @@ obj-$(CONFIG_HOTPLUG_CPU) += hotplug-cpu.o obj-$(CONFIG_HVC_CONSOLE) += hvconsole.o obj-$(CONFIG_HVCS) += hvcserver.o obj-$(CONFIG_HCALL_STATS) += hvCall_inst.o +obj-$(CONFIG_PHYP_DUMP) += phyp_dump.o diff --git a/arch/powerpc/platforms/pseries/eeh.c b/arch/powerpc/platforms/pseries/eeh.c index 9eb539e..550b2f7d 100644 --- a/arch/powerpc/platforms/pseries/eeh.c +++ b/arch/powerpc/platforms/pseries/eeh.c @@ -945,7 +945,6 @@ static void *early_enable_eeh(struct device_node *dn, void *data) unsigned int rets[3]; struct eeh_early_enable_info *info = data; int ret; - const char *status = of_get_property(dn, "status", NULL); const u32 *class_code = of_get_property(dn, "class-code", NULL); const u32 *vendor_id = of_get_property(dn, "vendor-id", NULL); const u32 *device_id = of_get_property(dn, "device-id", NULL); @@ -959,8 +958,8 @@ static void *early_enable_eeh(struct device_node *dn, void *data) pdn->eeh_freeze_count = 0; pdn->eeh_false_positives = 0; - if (status && strncmp(status, "ok", 2) != 0) - return NULL; /* ignore devices with bad status */ + if (!of_device_is_available(dn)) + return NULL; /* Ignore bad nodes. */ if (!class_code || !vendor_id || !device_id) diff --git a/arch/powerpc/platforms/pseries/lpar.c b/arch/powerpc/platforms/pseries/lpar.c index 9a455d4..233d9be 100644 --- a/arch/powerpc/platforms/pseries/lpar.c +++ b/arch/powerpc/platforms/pseries/lpar.c @@ -520,6 +520,20 @@ static void pSeries_lpar_hpte_invalidate(unsigned long slot, unsigned long va, BUG_ON(lpar_rc != H_SUCCESS); } +static void pSeries_lpar_hpte_removebolted(unsigned long ea, + int psize, int ssize) +{ + unsigned long slot, vsid, va; + + vsid = get_kernel_vsid(ea, ssize); + va = hpt_va(ea, vsid, ssize); + + slot = pSeries_lpar_hpte_find(va, psize, ssize); + BUG_ON(slot == -1); + + pSeries_lpar_hpte_invalidate(slot, va, psize, ssize, 0); +} + /* Flag bits for H_BULK_REMOVE */ #define HBR_REQUEST 0x4000000000000000UL #define HBR_RESPONSE 0x8000000000000000UL @@ -597,6 +611,7 @@ void __init hpte_init_lpar(void) ppc_md.hpte_updateboltedpp = pSeries_lpar_hpte_updateboltedpp; ppc_md.hpte_insert = pSeries_lpar_hpte_insert; ppc_md.hpte_remove = pSeries_lpar_hpte_remove; + ppc_md.hpte_removebolted = pSeries_lpar_hpte_removebolted; ppc_md.flush_hash_range = pSeries_lpar_flush_hash_range; ppc_md.hpte_clear_all = pSeries_lpar_hptab_clear; } diff --git a/arch/powerpc/platforms/pseries/pci_dlpar.c b/arch/powerpc/platforms/pseries/pci_dlpar.c index 5a5a19e..0d7229c 100644 --- a/arch/powerpc/platforms/pseries/pci_dlpar.c +++ b/arch/powerpc/platforms/pseries/pci_dlpar.c @@ -123,7 +123,7 @@ pcibios_pci_config_bridge(struct pci_dev *dev) /* Add to children of PCI bridge dev->bus */ child_bus = pci_add_new_bus(dev->bus, dev, sec_busno); if (!child_bus) { - printk (KERN_ERR "%s: could not add second bus\n", __FUNCTION__); + printk (KERN_ERR "%s: could not add second bus\n", __func__); return -EIO; } sprintf(child_bus->name, "PCI Bus #%02x", child_bus->number); diff --git a/arch/powerpc/platforms/pseries/phyp_dump.c b/arch/powerpc/platforms/pseries/phyp_dump.c new file mode 100644 index 0000000..7ddd105 --- /dev/null +++ b/arch/powerpc/platforms/pseries/phyp_dump.c @@ -0,0 +1,498 @@ +/* + * Hypervisor-assisted dump + * + * Linas Vepstas, Manish Ahuja 2008 + * Copyright 2008 IBM Corp. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + * + */ + +#include <linux/init.h> +#include <linux/kobject.h> +#include <linux/mm.h> +#include <linux/of.h> +#include <linux/pfn.h> +#include <linux/swap.h> +#include <linux/sysfs.h> + +#include <asm/page.h> +#include <asm/phyp_dump.h> +#include <asm/machdep.h> +#include <asm/prom.h> +#include <asm/rtas.h> + +/* Variables, used to communicate data between early boot and late boot */ +static struct phyp_dump phyp_dump_vars; +struct phyp_dump *phyp_dump_info = &phyp_dump_vars; + +static int ibm_configure_kernel_dump; +/* ------------------------------------------------- */ +/* RTAS interfaces to declare the dump regions */ + +struct dump_section { + u32 dump_flags; + u16 source_type; + u16 error_flags; + u64 source_address; + u64 source_length; + u64 length_copied; + u64 destination_address; +}; + +struct phyp_dump_header { + u32 version; + u16 num_of_sections; + u16 status; + + u32 first_offset_section; + u32 dump_disk_section; + u64 block_num_dd; + u64 num_of_blocks_dd; + u32 offset_dd; + u32 maxtime_to_auto; + /* No dump disk path string used */ + + struct dump_section cpu_data; + struct dump_section hpte_data; + struct dump_section kernel_data; +}; + +/* The dump header *must be* in low memory, so .bss it */ +static struct phyp_dump_header phdr; + +#define NUM_DUMP_SECTIONS 3 +#define DUMP_HEADER_VERSION 0x1 +#define DUMP_REQUEST_FLAG 0x1 +#define DUMP_SOURCE_CPU 0x0001 +#define DUMP_SOURCE_HPTE 0x0002 +#define DUMP_SOURCE_RMO 0x0011 +#define DUMP_ERROR_FLAG 0x2000 +#define DUMP_TRIGGERED 0x4000 +#define DUMP_PERFORMED 0x8000 + + +/** + * init_dump_header() - initialize the header declaring a dump + * Returns: length of dump save area. + * + * When the hypervisor saves crashed state, it needs to put + * it somewhere. The dump header tells the hypervisor where + * the data can be saved. + */ +static unsigned long init_dump_header(struct phyp_dump_header *ph) +{ + unsigned long addr_offset = 0; + + /* Set up the dump header */ + ph->version = DUMP_HEADER_VERSION; + ph->num_of_sections = NUM_DUMP_SECTIONS; + ph->status = 0; + + ph->first_offset_section = + (u32)offsetof(struct phyp_dump_header, cpu_data); + ph->dump_disk_section = 0; + ph->block_num_dd = 0; + ph->num_of_blocks_dd = 0; + ph->offset_dd = 0; + + ph->maxtime_to_auto = 0; /* disabled */ + + /* The first two sections are mandatory */ + ph->cpu_data.dump_flags = DUMP_REQUEST_FLAG; + ph->cpu_data.source_type = DUMP_SOURCE_CPU; + ph->cpu_data.source_address = 0; + ph->cpu_data.source_length = phyp_dump_info->cpu_state_size; + ph->cpu_data.destination_address = addr_offset; + addr_offset += phyp_dump_info->cpu_state_size; + + ph->hpte_data.dump_flags = DUMP_REQUEST_FLAG; + ph->hpte_data.source_type = DUMP_SOURCE_HPTE; + ph->hpte_data.source_address = 0; + ph->hpte_data.source_length = phyp_dump_info->hpte_region_size; + ph->hpte_data.destination_address = addr_offset; + addr_offset += phyp_dump_info->hpte_region_size; + + /* This section describes the low kernel region */ + ph->kernel_data.dump_flags = DUMP_REQUEST_FLAG; + ph->kernel_data.source_type = DUMP_SOURCE_RMO; + ph->kernel_data.source_address = PHYP_DUMP_RMR_START; + ph->kernel_data.source_length = PHYP_DUMP_RMR_END; + ph->kernel_data.destination_address = addr_offset; + addr_offset += ph->kernel_data.source_length; + + return addr_offset; +} + +static void print_dump_header(const struct phyp_dump_header *ph) +{ +#ifdef DEBUG + printk(KERN_INFO "dump header:\n"); + /* setup some ph->sections required */ + printk(KERN_INFO "version = %d\n", ph->version); + printk(KERN_INFO "Sections = %d\n", ph->num_of_sections); + printk(KERN_INFO "Status = 0x%x\n", ph->status); + + /* No ph->disk, so all should be set to 0 */ + printk(KERN_INFO "Offset to first section 0x%x\n", + ph->first_offset_section); + printk(KERN_INFO "dump disk sections should be zero\n"); + printk(KERN_INFO "dump disk section = %d\n", ph->dump_disk_section); + printk(KERN_INFO "block num = %ld\n", ph->block_num_dd); + printk(KERN_INFO "number of blocks = %ld\n", ph->num_of_blocks_dd); + printk(KERN_INFO "dump disk offset = %d\n", ph->offset_dd); + printk(KERN_INFO "Max auto time= %d\n", ph->maxtime_to_auto); + + /*set cpu state and hpte states as well scratch pad area */ + printk(KERN_INFO " CPU AREA \n"); + printk(KERN_INFO "cpu dump_flags =%d\n", ph->cpu_data.dump_flags); + printk(KERN_INFO "cpu source_type =%d\n", ph->cpu_data.source_type); + printk(KERN_INFO "cpu error_flags =%d\n", ph->cpu_data.error_flags); + printk(KERN_INFO "cpu source_address =%lx\n", + ph->cpu_data.source_address); + printk(KERN_INFO "cpu source_length =%lx\n", + ph->cpu_data.source_length); + printk(KERN_INFO "cpu length_copied =%lx\n", + ph->cpu_data.length_copied); + + printk(KERN_INFO " HPTE AREA \n"); + printk(KERN_INFO "HPTE dump_flags =%d\n", ph->hpte_data.dump_flags); + printk(KERN_INFO "HPTE source_type =%d\n", ph->hpte_data.source_type); + printk(KERN_INFO "HPTE error_flags =%d\n", ph->hpte_data.error_flags); + printk(KERN_INFO "HPTE source_address =%lx\n", + ph->hpte_data.source_address); + printk(KERN_INFO "HPTE source_length =%lx\n", + ph->hpte_data.source_length); + printk(KERN_INFO "HPTE length_copied =%lx\n", + ph->hpte_data.length_copied); + + printk(KERN_INFO " SRSD AREA \n"); + printk(KERN_INFO "SRSD dump_flags =%d\n", ph->kernel_data.dump_flags); + printk(KERN_INFO "SRSD source_type =%d\n", ph->kernel_data.source_type); + printk(KERN_INFO "SRSD error_flags =%d\n", ph->kernel_data.error_flags); + printk(KERN_INFO "SRSD source_address =%lx\n", + ph->kernel_data.source_address); + printk(KERN_INFO "SRSD source_length =%lx\n", + ph->kernel_data.source_length); + printk(KERN_INFO "SRSD length_copied =%lx\n", + ph->kernel_data.length_copied); +#endif +} + +static ssize_t show_phyp_dump_active(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + + /* create filesystem entry so kdump is phyp-dump aware */ + return sprintf(buf, "%lx\n", phyp_dump_info->phyp_dump_at_boot); +} + +static struct kobj_attribute pdl = __ATTR(phyp_dump_active, 0600, + show_phyp_dump_active, + NULL); + +static void register_dump_area(struct phyp_dump_header *ph, unsigned long addr) +{ + int rc; + + /* Add addr value if not initialized before */ + if (ph->cpu_data.destination_address == 0) { + ph->cpu_data.destination_address += addr; + ph->hpte_data.destination_address += addr; + ph->kernel_data.destination_address += addr; + } + + /* ToDo Invalidate kdump and free memory range. */ + + do { + rc = rtas_call(ibm_configure_kernel_dump, 3, 1, NULL, + 1, ph, sizeof(struct phyp_dump_header)); + } while (rtas_busy_delay(rc)); + + if (rc) { + printk(KERN_ERR "phyp-dump: unexpected error (%d) on " + "register\n", rc); + print_dump_header(ph); + return; + } + + rc = sysfs_create_file(kernel_kobj, &pdl.attr); + if (rc) + printk(KERN_ERR "phyp-dump: unable to create sysfs" + " file (%d)\n", rc); +} + +static +void invalidate_last_dump(struct phyp_dump_header *ph, unsigned long addr) +{ + int rc; + + /* Add addr value if not initialized before */ + if (ph->cpu_data.destination_address == 0) { + ph->cpu_data.destination_address += addr; + ph->hpte_data.destination_address += addr; + ph->kernel_data.destination_address += addr; + } + + do { + rc = rtas_call(ibm_configure_kernel_dump, 3, 1, NULL, + 2, ph, sizeof(struct phyp_dump_header)); + } while (rtas_busy_delay(rc)); + + if (rc) { + printk(KERN_ERR "phyp-dump: unexpected error (%d) " + "on invalidate\n", rc); + print_dump_header(ph); + } +} + +/* ------------------------------------------------- */ +/** + * release_memory_range -- release memory previously lmb_reserved + * @start_pfn: starting physical frame number + * @nr_pages: number of pages to free. + * + * This routine will release memory that had been previously + * lmb_reserved in early boot. The released memory becomes + * available for genreal use. + */ +static void release_memory_range(unsigned long start_pfn, + unsigned long nr_pages) +{ + struct page *rpage; + unsigned long end_pfn; + long i; + + end_pfn = start_pfn + nr_pages; + + for (i = start_pfn; i <= end_pfn; i++) { + rpage = pfn_to_page(i); + if (PageReserved(rpage)) { + ClearPageReserved(rpage); + init_page_count(rpage); + __free_page(rpage); + totalram_pages++; + } + } +} + +/** + * track_freed_range -- Counts the range being freed. + * Once the counter goes to zero, it re-registers dump for + * future use. + */ +static void +track_freed_range(unsigned long addr, unsigned long length) +{ + static unsigned long scratch_area_size, reserved_area_size; + + if (addr < phyp_dump_info->init_reserve_start) + return; + + if ((addr >= phyp_dump_info->init_reserve_start) && + (addr <= phyp_dump_info->init_reserve_start + + phyp_dump_info->init_reserve_size)) + reserved_area_size += length; + + if ((addr >= phyp_dump_info->reserved_scratch_addr) && + (addr <= phyp_dump_info->reserved_scratch_addr + + phyp_dump_info->reserved_scratch_size)) + scratch_area_size += length; + + if ((reserved_area_size == phyp_dump_info->init_reserve_size) && + (scratch_area_size == phyp_dump_info->reserved_scratch_size)) { + + invalidate_last_dump(&phdr, + phyp_dump_info->reserved_scratch_addr); + register_dump_area(&phdr, + phyp_dump_info->reserved_scratch_addr); + } +} + +/* ------------------------------------------------- */ +/** + * sysfs_release_region -- sysfs interface to release memory range. + * + * Usage: + * "echo <start addr> <length> > /sys/kernel/release_region" + * + * Example: + * "echo 0x40000000 0x10000000 > /sys/kernel/release_region" + * + * will release 256MB starting at 1GB. + */ +static ssize_t store_release_region(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t count) +{ + unsigned long start_addr, length, end_addr; + unsigned long start_pfn, nr_pages; + ssize_t ret; + + ret = sscanf(buf, "%lx %lx", &start_addr, &length); + if (ret != 2) + return -EINVAL; + + track_freed_range(start_addr, length); + + /* Range-check - don't free any reserved memory that + * wasn't reserved for phyp-dump */ + if (start_addr < phyp_dump_info->init_reserve_start) + start_addr = phyp_dump_info->init_reserve_start; + + end_addr = phyp_dump_info->init_reserve_start + + phyp_dump_info->init_reserve_size; + if (start_addr+length > end_addr) + length = end_addr - start_addr; + + /* Release the region of memory assed in by user */ + start_pfn = PFN_DOWN(start_addr); + nr_pages = PFN_DOWN(length); + release_memory_range(start_pfn, nr_pages); + + return count; +} + +static ssize_t show_release_region(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + u64 second_addr_range; + + /* total reserved size - start of scratch area */ + second_addr_range = phyp_dump_info->init_reserve_size - + phyp_dump_info->reserved_scratch_size; + return sprintf(buf, "CPU:0x%lx-0x%lx: HPTE:0x%lx-0x%lx:" + " DUMP:0x%lx-0x%lx, 0x%lx-0x%lx:\n", + phdr.cpu_data.destination_address, + phdr.cpu_data.length_copied, + phdr.hpte_data.destination_address, + phdr.hpte_data.length_copied, + phdr.kernel_data.destination_address, + phdr.kernel_data.length_copied, + phyp_dump_info->init_reserve_start, + second_addr_range); +} + +static struct kobj_attribute rr = __ATTR(release_region, 0600, + show_release_region, + store_release_region); + +static int __init phyp_dump_setup(void) +{ + struct device_node *rtas; + const struct phyp_dump_header *dump_header = NULL; + unsigned long dump_area_start; + unsigned long dump_area_length; + int header_len = 0; + int rc; + + /* If no memory was reserved in early boot, there is nothing to do */ + if (phyp_dump_info->init_reserve_size == 0) + return 0; + + /* Return if phyp dump not supported */ + if (!phyp_dump_info->phyp_dump_configured) + return -ENOSYS; + + /* Is there dump data waiting for us? If there isn't, + * then register a new dump area, and release all of + * the rest of the reserved ram. + * + * The /rtas/ibm,kernel-dump rtas node is present only + * if there is dump data waiting for us. + */ + rtas = of_find_node_by_path("/rtas"); + if (rtas) { + dump_header = of_get_property(rtas, "ibm,kernel-dump", + &header_len); + of_node_put(rtas); + } + + print_dump_header(dump_header); + dump_area_length = init_dump_header(&phdr); + /* align down */ + dump_area_start = phyp_dump_info->init_reserve_start & PAGE_MASK; + + if (dump_header == NULL) { + register_dump_area(&phdr, dump_area_start); + return 0; + } + + /* re-register the dump area, if old dump was invalid */ + if ((dump_header) && (dump_header->status & DUMP_ERROR_FLAG)) { + invalidate_last_dump(&phdr, dump_area_start); + register_dump_area(&phdr, dump_area_start); + return 0; + } + + if (dump_header) { + phyp_dump_info->reserved_scratch_addr = + dump_header->cpu_data.destination_address; + phyp_dump_info->reserved_scratch_size = + dump_header->cpu_data.source_length + + dump_header->hpte_data.source_length + + dump_header->kernel_data.source_length; + } + + /* Should we create a dump_subsys, analogous to s390/ipl.c ? */ + rc = sysfs_create_file(kernel_kobj, &rr.attr); + if (rc) + printk(KERN_ERR "phyp-dump: unable to create sysfs file (%d)\n", + rc); + + /* ToDo: re-register the dump area, for next time. */ + return 0; +} +machine_subsys_initcall(pseries, phyp_dump_setup); + +int __init early_init_dt_scan_phyp_dump(unsigned long node, + const char *uname, int depth, void *data) +{ + const unsigned int *sizes; + + phyp_dump_info->phyp_dump_configured = 0; + phyp_dump_info->phyp_dump_is_active = 0; + + if (depth != 1 || strcmp(uname, "rtas") != 0) + return 0; + + if (of_get_flat_dt_prop(node, "ibm,configure-kernel-dump", NULL)) + phyp_dump_info->phyp_dump_configured++; + + if (of_get_flat_dt_prop(node, "ibm,dump-kernel", NULL)) + phyp_dump_info->phyp_dump_is_active++; + + sizes = of_get_flat_dt_prop(node, "ibm,configure-kernel-dump-sizes", + NULL); + if (!sizes) + return 0; + + if (sizes[0] == 1) + phyp_dump_info->cpu_state_size = *((unsigned long *)&sizes[1]); + + if (sizes[3] == 2) + phyp_dump_info->hpte_region_size = + *((unsigned long *)&sizes[4]); + return 1; +} + +/* Look for phyp_dump= cmdline option */ +static int __init early_phyp_dump_enabled(char *p) +{ + phyp_dump_info->phyp_dump_at_boot = 1; + + if (!p) + return 0; + + if (strncmp(p, "1", 1) == 0) + phyp_dump_info->phyp_dump_at_boot = 1; + else if (strncmp(p, "0", 1) == 0) + phyp_dump_info->phyp_dump_at_boot = 0; + + return 0; +} +early_param("phyp_dump", early_phyp_dump_enabled); + diff --git a/arch/powerpc/platforms/pseries/reconfig.c b/arch/powerpc/platforms/pseries/reconfig.c index 2800fce..ac75c10 100644 --- a/arch/powerpc/platforms/pseries/reconfig.c +++ b/arch/powerpc/platforms/pseries/reconfig.c @@ -222,14 +222,14 @@ static char * parse_next_property(char *buf, char *end, char **name, int *length tmp = strchr(buf, ' '); if (!tmp) { printk(KERN_ERR "property parse failed in %s at line %d\n", - __FUNCTION__, __LINE__); + __func__, __LINE__); return NULL; } *tmp = '\0'; if (++tmp >= end) { printk(KERN_ERR "property parse failed in %s at line %d\n", - __FUNCTION__, __LINE__); + __func__, __LINE__); return NULL; } @@ -238,12 +238,12 @@ static char * parse_next_property(char *buf, char *end, char **name, int *length *length = simple_strtoul(tmp, &tmp, 10); if (*length == -1) { printk(KERN_ERR "property parse failed in %s at line %d\n", - __FUNCTION__, __LINE__); + __func__, __LINE__); return NULL; } if (*tmp != ' ' || ++tmp >= end) { printk(KERN_ERR "property parse failed in %s at line %d\n", - __FUNCTION__, __LINE__); + __func__, __LINE__); return NULL; } @@ -252,12 +252,12 @@ static char * parse_next_property(char *buf, char *end, char **name, int *length tmp += *length; if (tmp > end) { printk(KERN_ERR "property parse failed in %s at line %d\n", - __FUNCTION__, __LINE__); + __func__, __LINE__); return NULL; } else if (tmp < end && *tmp != ' ' && *tmp != '\0') { printk(KERN_ERR "property parse failed in %s at line %d\n", - __FUNCTION__, __LINE__); + __func__, __LINE__); return NULL; } tmp++; diff --git a/arch/powerpc/platforms/pseries/scanlog.c b/arch/powerpc/platforms/pseries/scanlog.c index 8e1ef16..e5b0ea8 100644 --- a/arch/powerpc/platforms/pseries/scanlog.c +++ b/arch/powerpc/platforms/pseries/scanlog.c @@ -195,31 +195,30 @@ const struct file_operations scanlog_fops = { static int __init scanlog_init(void) { struct proc_dir_entry *ent; + void *data; + int err = -ENOMEM; ibm_scan_log_dump = rtas_token("ibm,scan-log-dump"); - if (ibm_scan_log_dump == RTAS_UNKNOWN_SERVICE) { - printk(KERN_ERR "scan-log-dump not implemented on this system\n"); - return -EIO; - } + if (ibm_scan_log_dump == RTAS_UNKNOWN_SERVICE) + return -ENODEV; - ent = create_proc_entry("ppc64/rtas/scan-log-dump", S_IRUSR, NULL); - if (ent) { - ent->proc_fops = &scanlog_fops; - /* Ideally we could allocate a buffer < 4G */ - ent->data = kmalloc(RTAS_DATA_BUF_SIZE, GFP_KERNEL); - if (!ent->data) { - printk(KERN_ERR "Failed to allocate a buffer\n"); - remove_proc_entry("scan-log-dump", ent->parent); - return -ENOMEM; - } - ((unsigned int *)ent->data)[0] = 0; - } else { - printk(KERN_ERR "Failed to create ppc64/scan-log-dump proc entry\n"); - return -EIO; - } + /* Ideally we could allocate a buffer < 4G */ + data = kzalloc(RTAS_DATA_BUF_SIZE, GFP_KERNEL); + if (!data) + goto err; + + ent = proc_create("ppc64/rtas/scan-log-dump", S_IRUSR, NULL, + &scanlog_fops); + if (!ent) + goto err; + + ent->data = data; proc_ppc64_scan_log_dump = ent; return 0; +err: + kfree(data); + return err; } static void __exit scanlog_cleanup(void) diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c index fdb9b1c..90555a3 100644 --- a/arch/powerpc/platforms/pseries/setup.c +++ b/arch/powerpc/platforms/pseries/setup.c @@ -393,6 +393,7 @@ static void pseries_dedicated_idle_sleep(void) { unsigned int cpu = smp_processor_id(); unsigned long start_snooze; + unsigned long in_purr, out_purr; /* * Indicate to the HV that we are idle. Now would be @@ -400,6 +401,7 @@ static void pseries_dedicated_idle_sleep(void) */ get_lppaca()->idle = 1; get_lppaca()->donate_dedicated_cpu = 1; + in_purr = mfspr(SPRN_PURR); /* * We come in with interrupts disabled, and need_resched() @@ -432,6 +434,8 @@ static void pseries_dedicated_idle_sleep(void) out: HMT_medium(); + out_purr = mfspr(SPRN_PURR); + get_lppaca()->wait_state_cycles += out_purr - in_purr; get_lppaca()->donate_dedicated_cpu = 0; get_lppaca()->idle = 0; } |