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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux

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Pull powerpc fixes from Michael Ellerman:
 "Some more powerpc fixes if you please"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux:
  powerpc: use device_online/offline() instead of cpu_up/down()
  powerpc/powernv: Properly fix LPC debugfs endianness
  powerpc: do_notify_resume can be called with bad thread_info flags argument
  powerpc/fadump: Fix endianess issues in firmware assisted dump handling
  powerpc: Fix section mismatch warning
This commit is contained in:
Linus Torvalds 2014-11-04 11:18:29 -08:00
commit 8a97577a59
7 changed files with 163 additions and 88 deletions
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52
arch/powerpc/include/asm/fadump.h
View File

@ -70,39 +70,39 @@
#define CPU_UNKNOWN (~((u32)0))
/* Utility macros */
#define SKIP_TO_NEXT_CPU(reg_entry) \
({ \
while (reg_entry->reg_id != REG_ID("CPUEND")) \
reg_entry++; \
reg_entry++; \
#define SKIP_TO_NEXT_CPU(reg_entry) \
({ \
while (be64_to_cpu(reg_entry->reg_id) != REG_ID("CPUEND")) \
reg_entry++; \
reg_entry++; \
})
/* Kernel Dump section info */
struct fadump_section {
u32 request_flag;
u16 source_data_type;
u16 error_flags;
u64 source_address;
u64 source_len;
u64 bytes_dumped;
u64 destination_address;
__be32 request_flag;
__be16 source_data_type;
__be16 error_flags;
__be64 source_address;
__be64 source_len;
__be64 bytes_dumped;
__be64 destination_address;
};
/* ibm,configure-kernel-dump header. */
struct fadump_section_header {
u32 dump_format_version;
u16 dump_num_sections;
u16 dump_status_flag;
u32 offset_first_dump_section;
__be32 dump_format_version;
__be16 dump_num_sections;
__be16 dump_status_flag;
__be32 offset_first_dump_section;
/* Fields for disk dump option. */
u32 dd_block_size;
u64 dd_block_offset;
u64 dd_num_blocks;
u32 dd_offset_disk_path;
__be32 dd_block_size;
__be64 dd_block_offset;
__be64 dd_num_blocks;
__be32 dd_offset_disk_path;
/* Maximum time allowed to prevent an automatic dump-reboot. */
u32 max_time_auto;
__be32 max_time_auto;
};
/*
@ -174,15 +174,15 @@ static inline u64 str_to_u64(const char *str)
/* Register save area header. */
struct fadump_reg_save_area_header {
u64 magic_number;
u32 version;
u32 num_cpu_offset;
__be64 magic_number;
__be32 version;
__be32 num_cpu_offset;
};
/* Register entry. */
struct fadump_reg_entry {
u64 reg_id;
u64 reg_value;
__be64 reg_id;
__be64 reg_value;
};
/* fadump crash info structure */

6
arch/powerpc/kernel/entry_64.S
View File

@ -659,7 +659,13 @@ _GLOBAL(ret_from_except_lite)
3:
#endif
bl save_nvgprs
/*
* Use a non volatile GPR to save and restore our thread_info flags
* across the call to restore_interrupts.
*/
mr r30,r4
bl restore_interrupts
mr r4,r30
addi r3,r1,STACK_FRAME_OVERHEAD
bl do_notify_resume
b ret_from_except

114
arch/powerpc/kernel/fadump.c
View File

@ -58,7 +58,7 @@ int __init early_init_dt_scan_fw_dump(unsigned long node,
const __be32 *sections;
int i, num_sections;
int size;
const int *token;
const __be32 *token;
if (depth != 1 || strcmp(uname, "rtas") != 0)
return 0;
@ -72,7 +72,7 @@ int __init early_init_dt_scan_fw_dump(unsigned long node,
return 1;
fw_dump.fadump_supported = 1;
fw_dump.ibm_configure_kernel_dump = *token;
fw_dump.ibm_configure_kernel_dump = be32_to_cpu(*token);
/*
* The 'ibm,kernel-dump' rtas node is present only if there is
@ -147,11 +147,11 @@ static unsigned long init_fadump_mem_struct(struct fadump_mem_struct *fdm,
memset(fdm, 0, sizeof(struct fadump_mem_struct));
addr = addr & PAGE_MASK;
fdm->header.dump_format_version = 0x00000001;
fdm->header.dump_num_sections = 3;
fdm->header.dump_format_version = cpu_to_be32(0x00000001);
fdm->header.dump_num_sections = cpu_to_be16(3);
fdm->header.dump_status_flag = 0;
fdm->header.offset_first_dump_section =
(u32)offsetof(struct fadump_mem_struct, cpu_state_data);
cpu_to_be32((u32)offsetof(struct fadump_mem_struct, cpu_state_data));
/*
* Fields for disk dump option.
@ -167,27 +167,27 @@ static unsigned long init_fadump_mem_struct(struct fadump_mem_struct *fdm,
/* Kernel dump sections */
/* cpu state data section. */
fdm->cpu_state_data.request_flag = FADUMP_REQUEST_FLAG;
fdm->cpu_state_data.source_data_type = FADUMP_CPU_STATE_DATA;
fdm->cpu_state_data.request_flag = cpu_to_be32(FADUMP_REQUEST_FLAG);
fdm->cpu_state_data.source_data_type = cpu_to_be16(FADUMP_CPU_STATE_DATA);
fdm->cpu_state_data.source_address = 0;
fdm->cpu_state_data.source_len = fw_dump.cpu_state_data_size;
fdm->cpu_state_data.destination_address = addr;
fdm->cpu_state_data.source_len = cpu_to_be64(fw_dump.cpu_state_data_size);
fdm->cpu_state_data.destination_address = cpu_to_be64(addr);
addr += fw_dump.cpu_state_data_size;
/* hpte region section */
fdm->hpte_region.request_flag = FADUMP_REQUEST_FLAG;
fdm->hpte_region.source_data_type = FADUMP_HPTE_REGION;
fdm->hpte_region.request_flag = cpu_to_be32(FADUMP_REQUEST_FLAG);
fdm->hpte_region.source_data_type = cpu_to_be16(FADUMP_HPTE_REGION);
fdm->hpte_region.source_address = 0;
fdm->hpte_region.source_len = fw_dump.hpte_region_size;
fdm->hpte_region.destination_address = addr;
fdm->hpte_region.source_len = cpu_to_be64(fw_dump.hpte_region_size);
fdm->hpte_region.destination_address = cpu_to_be64(addr);
addr += fw_dump.hpte_region_size;
/* RMA region section */
fdm->rmr_region.request_flag = FADUMP_REQUEST_FLAG;
fdm->rmr_region.source_data_type = FADUMP_REAL_MODE_REGION;
fdm->rmr_region.source_address = RMA_START;
fdm->rmr_region.source_len = fw_dump.boot_memory_size;
fdm->rmr_region.destination_address = addr;
fdm->rmr_region.request_flag = cpu_to_be32(FADUMP_REQUEST_FLAG);
fdm->rmr_region.source_data_type = cpu_to_be16(FADUMP_REAL_MODE_REGION);
fdm->rmr_region.source_address = cpu_to_be64(RMA_START);
fdm->rmr_region.source_len = cpu_to_be64(fw_dump.boot_memory_size);
fdm->rmr_region.destination_address = cpu_to_be64(addr);
addr += fw_dump.boot_memory_size;
return addr;
@ -272,7 +272,7 @@ int __init fadump_reserve_mem(void)
* first kernel.
*/
if (fdm_active)
fw_dump.boot_memory_size = fdm_active->rmr_region.source_len;
fw_dump.boot_memory_size = be64_to_cpu(fdm_active->rmr_region.source_len);
else
fw_dump.boot_memory_size = fadump_calculate_reserve_size();
@ -314,8 +314,8 @@ int __init fadump_reserve_mem(void)
(unsigned long)(base >> 20));
fw_dump.fadumphdr_addr =
fdm_active->rmr_region.destination_address +
fdm_active->rmr_region.source_len;
be64_to_cpu(fdm_active->rmr_region.destination_address) +
be64_to_cpu(fdm_active->rmr_region.source_len);
pr_debug("fadumphdr_addr = %p\n",
(void *) fw_dump.fadumphdr_addr);
} else {
@ -472,9 +472,9 @@ fadump_read_registers(struct fadump_reg_entry *reg_entry, struct pt_regs *regs)
{
memset(regs, 0, sizeof(struct pt_regs));
while (reg_entry->reg_id != REG_ID("CPUEND")) {
fadump_set_regval(regs, reg_entry->reg_id,
reg_entry->reg_value);
while (be64_to_cpu(reg_entry->reg_id) != REG_ID("CPUEND")) {
fadump_set_regval(regs, be64_to_cpu(reg_entry->reg_id),
be64_to_cpu(reg_entry->reg_value));
reg_entry++;
}
reg_entry++;
@ -603,20 +603,20 @@ static int __init fadump_build_cpu_notes(const struct fadump_mem_struct *fdm)
if (!fdm->cpu_state_data.bytes_dumped)
return -EINVAL;
addr = fdm->cpu_state_data.destination_address;
addr = be64_to_cpu(fdm->cpu_state_data.destination_address);
vaddr = __va(addr);
reg_header = vaddr;
if (reg_header->magic_number != REGSAVE_AREA_MAGIC) {
if (be64_to_cpu(reg_header->magic_number) != REGSAVE_AREA_MAGIC) {
printk(KERN_ERR "Unable to read register save area.\n");
return -ENOENT;
}
pr_debug("--------CPU State Data------------\n");
pr_debug("Magic Number: %llx\n", reg_header->magic_number);
pr_debug("NumCpuOffset: %x\n", reg_header->num_cpu_offset);
pr_debug("Magic Number: %llx\n", be64_to_cpu(reg_header->magic_number));
pr_debug("NumCpuOffset: %x\n", be32_to_cpu(reg_header->num_cpu_offset));
vaddr += reg_header->num_cpu_offset;
num_cpus = *((u32 *)(vaddr));
vaddr += be32_to_cpu(reg_header->num_cpu_offset);
num_cpus = be32_to_cpu(*((__be32 *)(vaddr)));
pr_debug("NumCpus : %u\n", num_cpus);
vaddr += sizeof(u32);
reg_entry = (struct fadump_reg_entry *)vaddr;
@ -639,13 +639,13 @@ static int __init fadump_build_cpu_notes(const struct fadump_mem_struct *fdm)
fdh = __va(fw_dump.fadumphdr_addr);
for (i = 0; i < num_cpus; i++) {
if (reg_entry->reg_id != REG_ID("CPUSTRT")) {
if (be64_to_cpu(reg_entry->reg_id) != REG_ID("CPUSTRT")) {
printk(KERN_ERR "Unable to read CPU state data\n");
rc = -ENOENT;
goto error_out;
}
/* Lower 4 bytes of reg_value contains logical cpu id */
cpu = reg_entry->reg_value & FADUMP_CPU_ID_MASK;
cpu = be64_to_cpu(reg_entry->reg_value) & FADUMP_CPU_ID_MASK;
if (fdh && !cpumask_test_cpu(cpu, &fdh->cpu_online_mask)) {
SKIP_TO_NEXT_CPU(reg_entry);
continue;
@ -692,7 +692,7 @@ static int __init process_fadump(const struct fadump_mem_struct *fdm_active)
return -EINVAL;
/* Check if the dump data is valid. */
if ((fdm_active->header.dump_status_flag == FADUMP_ERROR_FLAG) ||
if ((be16_to_cpu(fdm_active->header.dump_status_flag) == FADUMP_ERROR_FLAG) ||
(fdm_active->cpu_state_data.error_flags != 0) ||
(fdm_active->rmr_region.error_flags != 0)) {
printk(KERN_ERR "Dump taken by platform is not valid\n");
@ -828,7 +828,7 @@ static void fadump_setup_crash_memory_ranges(void)
static inline unsigned long fadump_relocate(unsigned long paddr)
{
if (paddr > RMA_START && paddr < fw_dump.boot_memory_size)
return fdm.rmr_region.destination_address + paddr;
return be64_to_cpu(fdm.rmr_region.destination_address) + paddr;
else
return paddr;
}
@ -902,7 +902,7 @@ static int fadump_create_elfcore_headers(char *bufp)
* to the specified destination_address. Hence set
* the correct offset.
*/
phdr->p_offset = fdm.rmr_region.destination_address;
phdr->p_offset = be64_to_cpu(fdm.rmr_region.destination_address);
}
phdr->p_paddr = mbase;
@ -951,7 +951,7 @@ static void register_fadump(void)
fadump_setup_crash_memory_ranges();
addr = fdm.rmr_region.destination_address + fdm.rmr_region.source_len;
addr = be64_to_cpu(fdm.rmr_region.destination_address) + be64_to_cpu(fdm.rmr_region.source_len);
/* Initialize fadump crash info header. */
addr = init_fadump_header(addr);
vaddr = __va(addr);
@ -1023,7 +1023,7 @@ void fadump_cleanup(void)
/* Invalidate the registration only if dump is active. */
if (fw_dump.dump_active) {
init_fadump_mem_struct(&fdm,
fdm_active->cpu_state_data.destination_address);
be64_to_cpu(fdm_active->cpu_state_data.destination_address));
fadump_invalidate_dump(&fdm);
}
}
@ -1063,7 +1063,7 @@ static void fadump_invalidate_release_mem(void)
return;
}
destination_address = fdm_active->cpu_state_data.destination_address;
destination_address = be64_to_cpu(fdm_active->cpu_state_data.destination_address);
fadump_cleanup();
mutex_unlock(&fadump_mutex);
@ -1183,31 +1183,31 @@ static int fadump_region_show(struct seq_file *m, void *private)
seq_printf(m,
"CPU : [%#016llx-%#016llx] %#llx bytes, "
"Dumped: %#llx\n",
fdm_ptr->cpu_state_data.destination_address,
fdm_ptr->cpu_state_data.destination_address +
fdm_ptr->cpu_state_data.source_len - 1,
fdm_ptr->cpu_state_data.source_len,
fdm_ptr->cpu_state_data.bytes_dumped);
be64_to_cpu(fdm_ptr->cpu_state_data.destination_address),
be64_to_cpu(fdm_ptr->cpu_state_data.destination_address) +
be64_to_cpu(fdm_ptr->cpu_state_data.source_len) - 1,
be64_to_cpu(fdm_ptr->cpu_state_data.source_len),
be64_to_cpu(fdm_ptr->cpu_state_data.bytes_dumped));
seq_printf(m,
"HPTE: [%#016llx-%#016llx] %#llx bytes, "
"Dumped: %#llx\n",
fdm_ptr->hpte_region.destination_address,
fdm_ptr->hpte_region.destination_address +
fdm_ptr->hpte_region.source_len - 1,
fdm_ptr->hpte_region.source_len,
fdm_ptr->hpte_region.bytes_dumped);
be64_to_cpu(fdm_ptr->hpte_region.destination_address),
be64_to_cpu(fdm_ptr->hpte_region.destination_address) +
be64_to_cpu(fdm_ptr->hpte_region.source_len) - 1,
be64_to_cpu(fdm_ptr->hpte_region.source_len),
be64_to_cpu(fdm_ptr->hpte_region.bytes_dumped));
seq_printf(m,
"DUMP: [%#016llx-%#016llx] %#llx bytes, "
"Dumped: %#llx\n",
fdm_ptr->rmr_region.destination_address,
fdm_ptr->rmr_region.destination_address +
fdm_ptr->rmr_region.source_len - 1,
fdm_ptr->rmr_region.source_len,
fdm_ptr->rmr_region.bytes_dumped);
be64_to_cpu(fdm_ptr->rmr_region.destination_address),
be64_to_cpu(fdm_ptr->rmr_region.destination_address) +
be64_to_cpu(fdm_ptr->rmr_region.source_len) - 1,
be64_to_cpu(fdm_ptr->rmr_region.source_len),
be64_to_cpu(fdm_ptr->rmr_region.bytes_dumped));
if (!fdm_active ||
(fw_dump.reserve_dump_area_start ==
fdm_ptr->cpu_state_data.destination_address))
be64_to_cpu(fdm_ptr->cpu_state_data.destination_address)))
goto out;
/* Dump is active. Show reserved memory region. */
@ -1215,10 +1215,10 @@ static int fadump_region_show(struct seq_file *m, void *private)
" : [%#016llx-%#016llx] %#llx bytes, "
"Dumped: %#llx\n",
(unsigned long long)fw_dump.reserve_dump_area_start,
fdm_ptr->cpu_state_data.destination_address - 1,
fdm_ptr->cpu_state_data.destination_address -
be64_to_cpu(fdm_ptr->cpu_state_data.destination_address) - 1,
be64_to_cpu(fdm_ptr->cpu_state_data.destination_address) -
fw_dump.reserve_dump_area_start,
fdm_ptr->cpu_state_data.destination_address -
be64_to_cpu(fdm_ptr->cpu_state_data.destination_address) -
fw_dump.reserve_dump_area_start);
out:
if (fdm_active)

2
arch/powerpc/mm/init_32.c
View File

@ -103,7 +103,7 @@ unsigned long __max_low_memory = MAX_LOW_MEM;
/*
* Check for command-line options that affect what MMU_init will do.
*/
void MMU_setup(void)
void __init MMU_setup(void)
{
/* Check for nobats option (used in mapin_ram). */
if (strstr(boot_command_line, "nobats")) {

59
arch/powerpc/platforms/powernv/opal-lpc.c
View File

@ -216,14 +216,54 @@ static ssize_t lpc_debug_read(struct file *filp, char __user *ubuf,
&data, len);
if (rc)
return -ENXIO;
/*
* Now there is some trickery with the data returned by OPAL
* as it's the desired data right justified in a 32-bit BE
* word.
*
* This is a very bad interface and I'm to blame for it :-(
*
* So we can't just apply a 32-bit swap to what comes from OPAL,
* because user space expects the *bytes* to be in their proper
* respective positions (ie, LPC position).
*
* So what we really want to do here is to shift data right
* appropriately on a LE kernel.
*
* IE. If the LPC transaction has bytes B0, B1, B2 and B3 in that
* order, we have in memory written to by OPAL at the "data"
* pointer:
*
* Bytes: OPAL "data" LE "data"
* 32-bit: B0 B1 B2 B3 B0B1B2B3 B3B2B1B0
* 16-bit: B0 B1 0000B0B1 B1B00000
* 8-bit: B0 000000B0 B0000000
*
* So a BE kernel will have the leftmost of the above in the MSB
* and rightmost in the LSB and can just then "cast" the u32 "data"
* down to the appropriate quantity and write it.
*
* However, an LE kernel can't. It doesn't need to swap because a
* load from data followed by a store to user are going to preserve
* the byte ordering which is the wire byte order which is what the
* user wants, but in order to "crop" to the right size, we need to
* shift right first.
*/
switch(len) {
case 4:
rc = __put_user((u32)data, (u32 __user *)ubuf);
break;
case 2:
#ifdef __LITTLE_ENDIAN__
data >>= 16;
#endif
rc = __put_user((u16)data, (u16 __user *)ubuf);
break;
default:
#ifdef __LITTLE_ENDIAN__
data >>= 24;
#endif
rc = __put_user((u8)data, (u8 __user *)ubuf);
break;
}
@ -263,12 +303,31 @@ static ssize_t lpc_debug_write(struct file *filp, const char __user *ubuf,
else if (todo > 1 && (pos & 1) == 0)
len = 2;
}
/*
* Similarly to the read case, we have some trickery here but
* it's different to handle. We need to pass the value to OPAL in
* a register whose layout depends on the access size. We want
* to reproduce the memory layout of the user, however we aren't
* doing a load from user and a store to another memory location
* which would achieve that. Here we pass the value to OPAL via
* a register which is expected to contain the "BE" interpretation
* of the byte sequence. IE: for a 32-bit access, byte 0 should be
* in the MSB. So here we *do* need to byteswap on LE.
*
* User bytes: LE "data" OPAL "data"
* 32-bit: B0 B1 B2 B3 B3B2B1B0 B0B1B2B3
* 16-bit: B0 B1 0000B1B0 0000B0B1
* 8-bit: B0 000000B0 000000B0
*/
switch(len) {
case 4:
rc = __get_user(data, (u32 __user *)ubuf);
data = cpu_to_be32(data);
break;
case 2:
rc = __get_user(data, (u16 __user *)ubuf);
data = cpu_to_be16(data);
break;
default:
rc = __get_user(data, (u8 __user *)ubuf);

4
arch/powerpc/platforms/pseries/dlpar.c
View File

@ -382,7 +382,7 @@ static int dlpar_online_cpu(struct device_node *dn)
BUG_ON(get_cpu_current_state(cpu)
!= CPU_STATE_OFFLINE);
cpu_maps_update_done();
rc = cpu_up(cpu);
rc = device_online(get_cpu_device(cpu));
if (rc)
goto out;
cpu_maps_update_begin();
@ -467,7 +467,7 @@ static int dlpar_offline_cpu(struct device_node *dn)
if (get_cpu_current_state(cpu) == CPU_STATE_ONLINE) {
set_preferred_offline_state(cpu, CPU_STATE_OFFLINE);
cpu_maps_update_done();
rc = cpu_down(cpu);
rc = device_offline(get_cpu_device(cpu));
if (rc)
goto out;
cpu_maps_update_begin();

14
arch/powerpc/platforms/pseries/lpar.c
View File

@ -43,6 +43,7 @@
#include <asm/trace.h>
#include <asm/firmware.h>
#include <asm/plpar_wrappers.h>
#include <asm/fadump.h>
#include "pseries.h"
@ -247,8 +248,17 @@ static void pSeries_lpar_hptab_clear(void)
}
#ifdef __LITTLE_ENDIAN__
/* Reset exceptions to big endian */
if (firmware_has_feature(FW_FEATURE_SET_MODE)) {
/*
* Reset exceptions to big endian.
*
* FIXME this is a hack for kexec, we need to reset the exception
* endian before starting the new kernel and this is a convenient place
* to do it.
*
* This is also called on boot when a fadump happens. In that case we
* must not change the exception endian mode.
*/
if (firmware_has_feature(FW_FEATURE_SET_MODE) && !is_fadump_active()) {
long rc;
rc = pseries_big_endian_exceptions();