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Diffstat (limited to 'arch/s390/boot/physmem_info.c')
-rw-r--r--arch/s390/boot/physmem_info.c189
1 files changed, 99 insertions, 90 deletions
diff --git a/arch/s390/boot/physmem_info.c b/arch/s390/boot/physmem_info.c
index 7617aa2d2f7e..45e3d057cfaa 100644
--- a/arch/s390/boot/physmem_info.c
+++ b/arch/s390/boot/physmem_info.c
@@ -1,4 +1,5 @@
// SPDX-License-Identifier: GPL-2.0
+#define boot_fmt(fmt) "physmem: " fmt
#include <linux/processor.h>
#include <linux/errno.h>
#include <linux/init.h>
@@ -28,7 +29,7 @@ static struct physmem_range *__get_physmem_range_ptr(u32 n)
return &physmem_info.online[n];
if (unlikely(!physmem_info.online_extended)) {
physmem_info.online_extended = (struct physmem_range *)physmem_alloc_range(
- RR_MEM_DETECT_EXTENDED, ENTRIES_EXTENDED_MAX, sizeof(long), 0,
+ RR_MEM_DETECT_EXT, ENTRIES_EXTENDED_MAX, sizeof(long), 0,
physmem_alloc_pos, true);
}
return &physmem_info.online_extended[n - MEM_INLINED_ENTRIES];
@@ -58,36 +59,22 @@ void add_physmem_online_range(u64 start, u64 end)
static int __diag260(unsigned long rx1, unsigned long rx2)
{
- unsigned long reg1, reg2, ry;
union register_pair rx;
int cc, exception;
- psw_t old;
+ unsigned long ry;
rx.even = rx1;
rx.odd = rx2;
ry = 0x10; /* storage configuration */
exception = 1;
- asm volatile(
- " mvc 0(16,%[psw_old]),0(%[psw_pgm])\n"
- " epsw %[reg1],%[reg2]\n"
- " st %[reg1],0(%[psw_pgm])\n"
- " st %[reg2],4(%[psw_pgm])\n"
- " larl %[reg1],1f\n"
- " stg %[reg1],8(%[psw_pgm])\n"
+ asm_inline volatile(
" diag %[rx],%[ry],0x260\n"
- " lhi %[exc],0\n"
- "1: mvc 0(16,%[psw_pgm]),0(%[psw_old])\n"
+ "0: lhi %[exc],0\n"
+ "1:\n"
CC_IPM(cc)
- : CC_OUT(cc, cc),
- [exc] "+d" (exception),
- [reg1] "=&d" (reg1),
- [reg2] "=&a" (reg2),
- [ry] "+&d" (ry),
- "+Q" (get_lowcore()->program_new_psw),
- "=Q" (old)
- : [rx] "d" (rx.pair),
- [psw_old] "a" (&old),
- [psw_pgm] "a" (&get_lowcore()->program_new_psw)
+ EX_TABLE(0b, 1b)
+ : CC_OUT(cc, cc), [exc] "+d" (exception), [ry] "+d" (ry)
+ : [rx] "d" (rx.pair)
: CC_CLOBBER_LIST("memory"));
cc = exception ? -1 : CC_TRANSFORM(cc);
return cc == 0 ? ry : -1;
@@ -117,29 +104,15 @@ static int diag260(void)
static int diag500_storage_limit(unsigned long *max_physmem_end)
{
unsigned long storage_limit;
- unsigned long reg1, reg2;
- psw_t old;
-
- asm volatile(
- " mvc 0(16,%[psw_old]),0(%[psw_pgm])\n"
- " epsw %[reg1],%[reg2]\n"
- " st %[reg1],0(%[psw_pgm])\n"
- " st %[reg2],4(%[psw_pgm])\n"
- " larl %[reg1],1f\n"
- " stg %[reg1],8(%[psw_pgm])\n"
- " lghi 1,%[subcode]\n"
- " lghi 2,0\n"
- " diag 2,4,0x500\n"
- "1: mvc 0(16,%[psw_pgm]),0(%[psw_old])\n"
- " lgr %[slimit],2\n"
- : [reg1] "=&d" (reg1),
- [reg2] "=&a" (reg2),
- [slimit] "=d" (storage_limit),
- "=Q" (get_lowcore()->program_new_psw),
- "=Q" (old)
- : [psw_old] "a" (&old),
- [psw_pgm] "a" (&get_lowcore()->program_new_psw),
- [subcode] "i" (DIAG500_SC_STOR_LIMIT)
+
+ asm_inline volatile(
+ " lghi %%r1,%[subcode]\n"
+ " lghi %%r2,0\n"
+ " diag %%r2,%%r4,0x500\n"
+ "0: lgr %[slimit],%%r2\n"
+ EX_TABLE(0b, 0b)
+ : [slimit] "=d" (storage_limit)
+ : [subcode] "i" (DIAG500_SC_STOR_LIMIT)
: "memory", "1", "2");
if (!storage_limit)
return -EINVAL;
@@ -150,31 +123,17 @@ static int diag500_storage_limit(unsigned long *max_physmem_end)
static int tprot(unsigned long addr)
{
- unsigned long reg1, reg2;
int cc, exception;
- psw_t old;
exception = 1;
- asm volatile(
- " mvc 0(16,%[psw_old]),0(%[psw_pgm])\n"
- " epsw %[reg1],%[reg2]\n"
- " st %[reg1],0(%[psw_pgm])\n"
- " st %[reg2],4(%[psw_pgm])\n"
- " larl %[reg1],1f\n"
- " stg %[reg1],8(%[psw_pgm])\n"
+ asm_inline volatile(
" tprot 0(%[addr]),0\n"
- " lhi %[exc],0\n"
- "1: mvc 0(16,%[psw_pgm]),0(%[psw_old])\n"
+ "0: lhi %[exc],0\n"
+ "1:\n"
CC_IPM(cc)
- : CC_OUT(cc, cc),
- [exc] "+d" (exception),
- [reg1] "=&d" (reg1),
- [reg2] "=&a" (reg2),
- "=Q" (get_lowcore()->program_new_psw.addr),
- "=Q" (old)
- : [psw_old] "a" (&old),
- [psw_pgm] "a" (&get_lowcore()->program_new_psw),
- [addr] "a" (addr)
+ EX_TABLE(0b, 1b)
+ : CC_OUT(cc, cc), [exc] "+d" (exception)
+ : [addr] "a" (addr)
: CC_CLOBBER_LIST("memory"));
cc = exception ? -EFAULT : CC_TRANSFORM(cc);
return cc;
@@ -207,11 +166,16 @@ unsigned long detect_max_physmem_end(void)
max_physmem_end = search_mem_end();
physmem_info.info_source = MEM_DETECT_BIN_SEARCH;
}
+ boot_debug("Max physical memory: 0x%016lx (info source: %s)\n", max_physmem_end,
+ get_physmem_info_source());
return max_physmem_end;
}
void detect_physmem_online_ranges(unsigned long max_physmem_end)
{
+ unsigned long start, end;
+ int i;
+
if (!sclp_early_read_storage_info()) {
physmem_info.info_source = MEM_DETECT_SCLP_STOR_INFO;
} else if (physmem_info.info_source == MEM_DETECT_DIAG500_STOR_LIMIT) {
@@ -226,12 +190,16 @@ void detect_physmem_online_ranges(unsigned long max_physmem_end)
} else if (max_physmem_end) {
add_physmem_online_range(0, max_physmem_end);
}
+ boot_debug("Online memory ranges (info source: %s):\n", get_physmem_info_source());
+ for_each_physmem_online_range(i, &start, &end)
+ boot_debug(" online [%d]: 0x%016lx-0x%016lx\n", i, start, end);
}
void physmem_set_usable_limit(unsigned long limit)
{
physmem_info.usable = limit;
physmem_alloc_pos = limit;
+ boot_debug("Usable memory limit: 0x%016lx\n", limit);
}
static void die_oom(unsigned long size, unsigned long align, unsigned long min, unsigned long max)
@@ -241,38 +209,47 @@ static void die_oom(unsigned long size, unsigned long align, unsigned long min,
enum reserved_range_type t;
int i;
- boot_printk("Linux version %s\n", kernel_version);
+ boot_emerg("Linux version %s\n", kernel_version);
if (!is_prot_virt_guest() && early_command_line[0])
- boot_printk("Kernel command line: %s\n", early_command_line);
- boot_printk("Out of memory allocating %lx bytes %lx aligned in range %lx:%lx\n",
- size, align, min, max);
- boot_printk("Reserved memory ranges:\n");
+ boot_emerg("Kernel command line: %s\n", early_command_line);
+ boot_emerg("Out of memory allocating %lu bytes 0x%lx aligned in range %lx:%lx\n",
+ size, align, min, max);
+ boot_emerg("Reserved memory ranges:\n");
for_each_physmem_reserved_range(t, range, &start, &end) {
- boot_printk("%016lx %016lx %s\n", start, end, get_rr_type_name(t));
+ boot_emerg("%016lx %016lx %s\n", start, end, get_rr_type_name(t));
total_reserved_mem += end - start;
}
- boot_printk("Usable online memory ranges (info source: %s [%x]):\n",
- get_physmem_info_source(), physmem_info.info_source);
+ boot_emerg("Usable online memory ranges (info source: %s [%d]):\n",
+ get_physmem_info_source(), physmem_info.info_source);
for_each_physmem_usable_range(i, &start, &end) {
- boot_printk("%016lx %016lx\n", start, end);
+ boot_emerg("%016lx %016lx\n", start, end);
total_mem += end - start;
}
- boot_printk("Usable online memory total: %lx Reserved: %lx Free: %lx\n",
- total_mem, total_reserved_mem,
- total_mem > total_reserved_mem ? total_mem - total_reserved_mem : 0);
+ boot_emerg("Usable online memory total: %lu Reserved: %lu Free: %lu\n",
+ total_mem, total_reserved_mem,
+ total_mem > total_reserved_mem ? total_mem - total_reserved_mem : 0);
print_stacktrace(current_frame_address());
- boot_printk("\n\n -- System halted\n");
+ boot_emerg(" -- System halted\n");
disabled_wait();
}
-void physmem_reserve(enum reserved_range_type type, unsigned long addr, unsigned long size)
+static void _physmem_reserve(enum reserved_range_type type, unsigned long addr, unsigned long size)
{
physmem_info.reserved[type].start = addr;
physmem_info.reserved[type].end = addr + size;
}
+void physmem_reserve(enum reserved_range_type type, unsigned long addr, unsigned long size)
+{
+ _physmem_reserve(type, addr, size);
+ boot_debug("%-14s 0x%016lx-0x%016lx %s\n", "Reserve:", addr, addr + size,
+ get_rr_type_name(type));
+}
+
void physmem_free(enum reserved_range_type type)
{
+ boot_debug("%-14s 0x%016lx-0x%016lx %s\n", "Free:", physmem_info.reserved[type].start,
+ physmem_info.reserved[type].end, get_rr_type_name(type));
physmem_info.reserved[type].start = 0;
physmem_info.reserved[type].end = 0;
}
@@ -339,41 +316,73 @@ unsigned long physmem_alloc_range(enum reserved_range_type type, unsigned long s
max = min(max, physmem_alloc_pos);
addr = __physmem_alloc_range(size, align, min, max, 0, NULL, die_on_oom);
if (addr)
- physmem_reserve(type, addr, size);
+ _physmem_reserve(type, addr, size);
+ boot_debug("%-14s 0x%016lx-0x%016lx %s\n", "Alloc range:", addr, addr + size,
+ get_rr_type_name(type));
return addr;
}
-unsigned long physmem_alloc_top_down(enum reserved_range_type type, unsigned long size,
- unsigned long align)
+unsigned long physmem_alloc(enum reserved_range_type type, unsigned long size,
+ unsigned long align, bool die_on_oom)
{
struct reserved_range *range = &physmem_info.reserved[type];
- struct reserved_range *new_range;
+ struct reserved_range *new_range = NULL;
unsigned int ranges_left;
unsigned long addr;
addr = __physmem_alloc_range(size, align, 0, physmem_alloc_pos, physmem_alloc_ranges,
- &ranges_left, true);
+ &ranges_left, die_on_oom);
+ if (!addr)
+ return 0;
/* if not a consecutive allocation of the same type or first allocation */
if (range->start != addr + size) {
if (range->end) {
- physmem_alloc_pos = __physmem_alloc_range(
- sizeof(struct reserved_range), 0, 0, physmem_alloc_pos,
- physmem_alloc_ranges, &ranges_left, true);
- new_range = (struct reserved_range *)physmem_alloc_pos;
+ addr = __physmem_alloc_range(sizeof(struct reserved_range), 0, 0,
+ physmem_alloc_pos, physmem_alloc_ranges,
+ &ranges_left, true);
+ new_range = (struct reserved_range *)addr;
+ addr = __physmem_alloc_range(size, align, 0, addr, ranges_left,
+ &ranges_left, die_on_oom);
+ if (!addr)
+ return 0;
*new_range = *range;
range->chain = new_range;
- addr = __physmem_alloc_range(size, align, 0, physmem_alloc_pos,
- ranges_left, &ranges_left, true);
}
range->end = addr + size;
}
+ if (type != RR_VMEM) {
+ boot_debug("%-14s 0x%016lx-0x%016lx %-20s align 0x%lx split %d\n", "Alloc topdown:",
+ addr, addr + size, get_rr_type_name(type), align, !!new_range);
+ }
range->start = addr;
physmem_alloc_pos = addr;
physmem_alloc_ranges = ranges_left;
return addr;
}
+unsigned long physmem_alloc_or_die(enum reserved_range_type type, unsigned long size,
+ unsigned long align)
+{
+ return physmem_alloc(type, size, align, true);
+}
+
unsigned long get_physmem_alloc_pos(void)
{
return physmem_alloc_pos;
}
+
+void dump_physmem_reserved(void)
+{
+ struct reserved_range *range;
+ enum reserved_range_type t;
+ unsigned long start, end;
+
+ boot_debug("Reserved memory ranges:\n");
+ for_each_physmem_reserved_range(t, range, &start, &end) {
+ if (end) {
+ boot_debug("%-14s 0x%016lx-0x%016lx @%012lx chain %012lx\n",
+ get_rr_type_name(t), start, end, (unsigned long)range,
+ (unsigned long)range->chain);
+ }
+ }
+}
generated by cgit v1.2.3 (git 2.39.0) at 2025-07-14 09:16:55 +0300