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-rw-r--r--arch/ia64/kernel/crash.c83
-rw-r--r--arch/ia64/kernel/head.S6
-rw-r--r--arch/ia64/kernel/machine_kexec.c15
-rw-r--r--arch/ia64/kernel/mca.c15
-rw-r--r--arch/ia64/kernel/mca_asm.S47
-rw-r--r--arch/ia64/kernel/relocate_kernel.S2
-rw-r--r--arch/ia64/kernel/vmlinux.lds.S113
7 files changed, 150 insertions, 131 deletions
diff --git a/arch/ia64/kernel/crash.c b/arch/ia64/kernel/crash.c
index f065093f8e9..6631a9dfafd 100644
--- a/arch/ia64/kernel/crash.c
+++ b/arch/ia64/kernel/crash.c
@@ -23,6 +23,7 @@
int kdump_status[NR_CPUS];
static atomic_t kdump_cpu_frozen;
atomic_t kdump_in_progress;
+static int kdump_freeze_monarch;
static int kdump_on_init = 1;
static int kdump_on_fatal_mca = 1;
@@ -108,10 +109,38 @@ machine_crash_shutdown(struct pt_regs *pt)
*/
kexec_disable_iosapic();
#ifdef CONFIG_SMP
+ /*
+ * If kdump_on_init is set and an INIT is asserted here, kdump will
+ * be started again via INIT monarch.
+ */
+ local_irq_disable();
+ ia64_set_psr_mc(); /* mask MCA/INIT */
+ if (atomic_inc_return(&kdump_in_progress) != 1)
+ unw_init_running(kdump_cpu_freeze, NULL);
+
+ /*
+ * Now this cpu is ready for kdump.
+ * Stop all others by IPI or INIT. They could receive INIT from
+ * outside and might be INIT monarch, but only thing they have to
+ * do is falling into kdump_cpu_freeze().
+ *
+ * If an INIT is asserted here:
+ * - All receivers might be slaves, since some of cpus could already
+ * be frozen and INIT might be masked on monarch. In this case,
+ * all slaves will be frozen soon since kdump_in_progress will let
+ * them into DIE_INIT_SLAVE_LEAVE.
+ * - One might be a monarch, but INIT rendezvous will fail since
+ * at least this cpu already have INIT masked so it never join
+ * to the rendezvous. In this case, all slaves and monarch will
+ * be frozen soon with no wait since the INIT rendezvous is skipped
+ * by kdump_in_progress.
+ */
kdump_smp_send_stop();
/* not all cpu response to IPI, send INIT to freeze them */
- if (kdump_wait_cpu_freeze() && kdump_on_init) {
+ if (kdump_wait_cpu_freeze()) {
kdump_smp_send_init();
+ /* wait again, don't go ahead if possible */
+ kdump_wait_cpu_freeze();
}
#endif
}
@@ -129,17 +158,17 @@ void
kdump_cpu_freeze(struct unw_frame_info *info, void *arg)
{
int cpuid;
+
local_irq_disable();
cpuid = smp_processor_id();
crash_save_this_cpu();
current->thread.ksp = (__u64)info->sw - 16;
+
+ ia64_set_psr_mc(); /* mask MCA/INIT and stop reentrance */
+
atomic_inc(&kdump_cpu_frozen);
kdump_status[cpuid] = 1;
mb();
-#ifdef CONFIG_HOTPLUG_CPU
- if (cpuid != 0)
- ia64_jump_to_sal(&sal_boot_rendez_state[cpuid]);
-#endif
for (;;)
cpu_relax();
}
@@ -150,6 +179,20 @@ kdump_init_notifier(struct notifier_block *self, unsigned long val, void *data)
struct ia64_mca_notify_die *nd;
struct die_args *args = data;
+ if (atomic_read(&kdump_in_progress)) {
+ switch (val) {
+ case DIE_INIT_MONARCH_LEAVE:
+ if (!kdump_freeze_monarch)
+ break;
+ /* fall through */
+ case DIE_INIT_SLAVE_LEAVE:
+ case DIE_INIT_MONARCH_ENTER:
+ case DIE_MCA_RENDZVOUS_LEAVE:
+ unw_init_running(kdump_cpu_freeze, NULL);
+ break;
+ }
+ }
+
if (!kdump_on_init && !kdump_on_fatal_mca)
return NOTIFY_DONE;
@@ -162,43 +205,31 @@ kdump_init_notifier(struct notifier_block *self, unsigned long val, void *data)
}
if (val != DIE_INIT_MONARCH_LEAVE &&
- val != DIE_INIT_SLAVE_LEAVE &&
val != DIE_INIT_MONARCH_PROCESS &&
- val != DIE_MCA_RENDZVOUS_LEAVE &&
val != DIE_MCA_MONARCH_LEAVE)
return NOTIFY_DONE;
nd = (struct ia64_mca_notify_die *)args->err;
- /* Reason code 1 means machine check rendezvous*/
- if ((val == DIE_INIT_MONARCH_LEAVE || val == DIE_INIT_SLAVE_LEAVE
- || val == DIE_INIT_MONARCH_PROCESS) && nd->sos->rv_rc == 1)
- return NOTIFY_DONE;
switch (val) {
case DIE_INIT_MONARCH_PROCESS:
- if (kdump_on_init) {
- atomic_set(&kdump_in_progress, 1);
- *(nd->monarch_cpu) = -1;
+ /* Reason code 1 means machine check rendezvous*/
+ if (kdump_on_init && (nd->sos->rv_rc != 1)) {
+ if (atomic_inc_return(&kdump_in_progress) != 1)
+ kdump_freeze_monarch = 1;
}
break;
case DIE_INIT_MONARCH_LEAVE:
- if (kdump_on_init)
+ /* Reason code 1 means machine check rendezvous*/
+ if (kdump_on_init && (nd->sos->rv_rc != 1))
machine_kdump_on_init();
break;
- case DIE_INIT_SLAVE_LEAVE:
- if (atomic_read(&kdump_in_progress))
- unw_init_running(kdump_cpu_freeze, NULL);
- break;
- case DIE_MCA_RENDZVOUS_LEAVE:
- if (atomic_read(&kdump_in_progress))
- unw_init_running(kdump_cpu_freeze, NULL);
- break;
case DIE_MCA_MONARCH_LEAVE:
/* *(nd->data) indicate if MCA is recoverable */
if (kdump_on_fatal_mca && !(*(nd->data))) {
- atomic_set(&kdump_in_progress, 1);
- *(nd->monarch_cpu) = -1;
- machine_kdump_on_init();
+ if (atomic_inc_return(&kdump_in_progress) == 1)
+ machine_kdump_on_init();
+ /* We got fatal MCA while kdump!? No way!! */
}
break;
}
diff --git a/arch/ia64/kernel/head.S b/arch/ia64/kernel/head.S
index 23f846de62d..1a6e44515eb 100644
--- a/arch/ia64/kernel/head.S
+++ b/arch/ia64/kernel/head.S
@@ -167,7 +167,7 @@ RestRR: \
mov _tmp2=((ia64_rid(IA64_REGION_ID_KERNEL, (num<<61)) << 8) | (pgsize << 2) | vhpt);; \
mov rr[_tmp1]=_tmp2
- .section __special_page_section,"ax"
+ __PAGE_ALIGNED_DATA
.global empty_zero_page
empty_zero_page:
@@ -181,7 +181,7 @@ swapper_pg_dir:
halt_msg:
stringz "Halting kernel\n"
- .section .text.head,"ax"
+ __REF
.global start_ap
@@ -1242,7 +1242,7 @@ GLOBAL_ENTRY(ia64_jump_to_sal)
movl r16=SAL_PSR_BITS_TO_SET;;
mov cr.ipsr=r16
mov cr.ifs=r0;;
- rfi;;
+ rfi;; // note: this unmask MCA/INIT (psr.mc)
1:
/*
* Invalidate all TLB data/inst
diff --git a/arch/ia64/kernel/machine_kexec.c b/arch/ia64/kernel/machine_kexec.c
index 0823de1f6eb..3d3aeef4694 100644
--- a/arch/ia64/kernel/machine_kexec.c
+++ b/arch/ia64/kernel/machine_kexec.c
@@ -24,6 +24,8 @@
#include <asm/delay.h>
#include <asm/meminit.h>
#include <asm/processor.h>
+#include <asm/sal.h>
+#include <asm/mca.h>
typedef NORET_TYPE void (*relocate_new_kernel_t)(
unsigned long indirection_page,
@@ -85,13 +87,26 @@ static void ia64_machine_kexec(struct unw_frame_info *info, void *arg)
void *pal_addr = efi_get_pal_addr();
unsigned long code_addr = (unsigned long)page_address(image->control_code_page);
int ii;
+ u64 fp, gp;
+ ia64_fptr_t *init_handler = (ia64_fptr_t *)ia64_os_init_on_kdump;
BUG_ON(!image);
if (image->type == KEXEC_TYPE_CRASH) {
crash_save_this_cpu();
current->thread.ksp = (__u64)info->sw - 16;
+
+ /* Register noop init handler */
+ fp = ia64_tpa(init_handler->fp);
+ gp = ia64_tpa(ia64_getreg(_IA64_REG_GP));
+ ia64_sal_set_vectors(SAL_VECTOR_OS_INIT, fp, gp, 0, fp, gp, 0);
+ } else {
+ /* Unregister init handlers of current kernel */
+ ia64_sal_set_vectors(SAL_VECTOR_OS_INIT, 0, 0, 0, 0, 0, 0);
}
+ /* Unregister mca handler - No more recovery on current kernel */
+ ia64_sal_set_vectors(SAL_VECTOR_OS_MCA, 0, 0, 0, 0, 0, 0);
+
/* Interrupts aren't acceptable while we reboot */
local_irq_disable();
diff --git a/arch/ia64/kernel/mca.c b/arch/ia64/kernel/mca.c
index 7b30d21c519..d2877a7bfe2 100644
--- a/arch/ia64/kernel/mca.c
+++ b/arch/ia64/kernel/mca.c
@@ -1682,14 +1682,25 @@ ia64_init_handler(struct pt_regs *regs, struct switch_stack *sw,
if (!sos->monarch) {
ia64_mc_info.imi_rendez_checkin[cpu] = IA64_MCA_RENDEZ_CHECKIN_INIT;
+
+#ifdef CONFIG_KEXEC
+ while (monarch_cpu == -1 && !atomic_read(&kdump_in_progress))
+ udelay(1000);
+#else
while (monarch_cpu == -1)
- cpu_relax(); /* spin until monarch enters */
+ cpu_relax(); /* spin until monarch enters */
+#endif
NOTIFY_INIT(DIE_INIT_SLAVE_ENTER, regs, (long)&nd, 1);
NOTIFY_INIT(DIE_INIT_SLAVE_PROCESS, regs, (long)&nd, 1);
+#ifdef CONFIG_KEXEC
+ while (monarch_cpu != -1 && !atomic_read(&kdump_in_progress))
+ udelay(1000);
+#else
while (monarch_cpu != -1)
- cpu_relax(); /* spin until monarch leaves */
+ cpu_relax(); /* spin until monarch leaves */
+#endif
NOTIFY_INIT(DIE_INIT_SLAVE_LEAVE, regs, (long)&nd, 1);
diff --git a/arch/ia64/kernel/mca_asm.S b/arch/ia64/kernel/mca_asm.S
index a06d46548ff..7461d2573d4 100644
--- a/arch/ia64/kernel/mca_asm.S
+++ b/arch/ia64/kernel/mca_asm.S
@@ -40,6 +40,7 @@
.global ia64_do_tlb_purge
.global ia64_os_mca_dispatch
+ .global ia64_os_init_on_kdump
.global ia64_os_init_dispatch_monarch
.global ia64_os_init_dispatch_slave
@@ -299,6 +300,25 @@ END(ia64_os_mca_virtual_begin)
//StartMain////////////////////////////////////////////////////////////////////
//
+// NOP init handler for kdump. In panic situation, we may receive INIT
+// while kernel transition. Since we initialize registers on leave from
+// current kernel, no longer monarch/slave handlers of current kernel in
+// virtual mode are called safely.
+// We can unregister these init handlers from SAL, however then the INIT
+// will result in warmboot by SAL and we cannot retrieve the crashdump.
+// Therefore register this NOP function to SAL, to prevent entering virtual
+// mode and resulting warmboot by SAL.
+//
+ia64_os_init_on_kdump:
+ mov r8=r0 // IA64_INIT_RESUME
+ mov r9=r10 // SAL_GP
+ mov r22=r17 // *minstate
+ ;;
+ mov r10=r0 // return to same context
+ mov b0=r12 // SAL_CHECK return address
+ br b0
+
+//
// SAL to OS entry point for INIT on all processors. This has been defined for
// registration purposes with SAL as a part of ia64_mca_init. Monarch and
// slave INIT have identical processing, except for the value of the
@@ -1073,3 +1093,30 @@ GLOBAL_ENTRY(ia64_get_rnat)
mov ar.rsc=3
br.ret.sptk.many rp
END(ia64_get_rnat)
+
+
+// void ia64_set_psr_mc(void)
+//
+// Set psr.mc bit to mask MCA/INIT.
+GLOBAL_ENTRY(ia64_set_psr_mc)
+ rsm psr.i | psr.ic // disable interrupts
+ ;;
+ srlz.d
+ ;;
+ mov r14 = psr // get psr{36:35,31:0}
+ movl r15 = 1f
+ ;;
+ dep r14 = -1, r14, PSR_MC, 1 // set psr.mc
+ ;;
+ dep r14 = -1, r14, PSR_IC, 1 // set psr.ic
+ ;;
+ dep r14 = -1, r14, PSR_BN, 1 // keep bank1 in use
+ ;;
+ mov cr.ipsr = r14
+ mov cr.ifs = r0
+ mov cr.iip = r15
+ ;;
+ rfi
+1:
+ br.ret.sptk.many rp
+END(ia64_set_psr_mc)
diff --git a/arch/ia64/kernel/relocate_kernel.S b/arch/ia64/kernel/relocate_kernel.S
index 903babd22d6..32f6fc131fb 100644
--- a/arch/ia64/kernel/relocate_kernel.S
+++ b/arch/ia64/kernel/relocate_kernel.S
@@ -52,7 +52,7 @@ GLOBAL_ENTRY(relocate_new_kernel)
srlz.i
;;
mov ar.rnat=r18
- rfi
+ rfi // note: this unmask MCA/INIT (psr.mc)
;;
1:
//physical mode code begin
diff --git a/arch/ia64/kernel/vmlinux.lds.S b/arch/ia64/kernel/vmlinux.lds.S
index eb4214d1c5a..0a0c77b2c98 100644
--- a/arch/ia64/kernel/vmlinux.lds.S
+++ b/arch/ia64/kernel/vmlinux.lds.S
@@ -51,8 +51,6 @@ SECTIONS
KPROBES_TEXT
*(.gnu.linkonce.t*)
}
- .text.head : AT(ADDR(.text.head) - LOAD_OFFSET)
- { *(.text.head) }
.text2 : AT(ADDR(.text2) - LOAD_OFFSET)
{ *(.text2) }
#ifdef CONFIG_SMP
@@ -66,14 +64,7 @@ SECTIONS
NOTES :code :note /* put .notes in text and mark in PT_NOTE */
code_continues : {} :code /* switch back to regular program... */
- /* Exception table */
- . = ALIGN(16);
- __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET)
- {
- __start___ex_table = .;
- *(__ex_table)
- __stop___ex_table = .;
- }
+ EXCEPTION_TABLE(16)
/* MCA table */
. = ALIGN(16);
@@ -115,38 +106,9 @@ SECTIONS
. = ALIGN(PAGE_SIZE);
__init_begin = .;
- .init.text : AT(ADDR(.init.text) - LOAD_OFFSET)
- {
- _sinittext = .;
- INIT_TEXT
- _einittext = .;
- }
-
- .init.data : AT(ADDR(.init.data) - LOAD_OFFSET)
- { INIT_DATA }
-#ifdef CONFIG_BLK_DEV_INITRD
- .init.ramfs : AT(ADDR(.init.ramfs) - LOAD_OFFSET)
- {
- __initramfs_start = .;
- *(.init.ramfs)
- __initramfs_end = .;
- }
-#endif
-
- . = ALIGN(16);
- .init.setup : AT(ADDR(.init.setup) - LOAD_OFFSET)
- {
- __setup_start = .;
- *(.init.setup)
- __setup_end = .;
- }
- .initcall.init : AT(ADDR(.initcall.init) - LOAD_OFFSET)
- {
- __initcall_start = .;
- INITCALLS
- __initcall_end = .;
- }
+ INIT_TEXT_SECTION(PAGE_SIZE)
+ INIT_DATA_SECTION(16)
.data.patch.vtop : AT(ADDR(.data.patch.vtop) - LOAD_OFFSET)
{
@@ -204,24 +166,13 @@ SECTIONS
}
#endif
- . = ALIGN(8);
- __con_initcall_start = .;
- .con_initcall.init : AT(ADDR(.con_initcall.init) - LOAD_OFFSET)
- { *(.con_initcall.init) }
- __con_initcall_end = .;
- __security_initcall_start = .;
- .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET)
- { *(.security_initcall.init) }
- __security_initcall_end = .;
. = ALIGN(PAGE_SIZE);
__init_end = .;
- /* The initial task and kernel stack */
- .data.init_task : AT(ADDR(.data.init_task) - LOAD_OFFSET)
- { *(.data.init_task) }
-
.data.page_aligned : AT(ADDR(.data.page_aligned) - LOAD_OFFSET)
- { *(__special_page_section)
+ {
+ PAGE_ALIGNED_DATA(PAGE_SIZE)
+ . = ALIGN(PAGE_SIZE);
__start_gate_section = .;
*(.data.gate)
__stop_gate_section = .;
@@ -236,12 +187,6 @@ SECTIONS
* kernel data
*/
- .data.read_mostly : AT(ADDR(.data.read_mostly) - LOAD_OFFSET)
- { *(.data.read_mostly) }
-
- .data.cacheline_aligned : AT(ADDR(.data.cacheline_aligned) - LOAD_OFFSET)
- { *(.data.cacheline_aligned) }
-
/* Per-cpu data: */
. = ALIGN(PERCPU_PAGE_SIZE);
PERCPU_VADDR(PERCPU_ADDR, :percpu)
@@ -258,6 +203,9 @@ SECTIONS
__cpu0_per_cpu = .;
. = . + PERCPU_PAGE_SIZE; /* cpu0 per-cpu space */
#endif
+ INIT_TASK_DATA(PAGE_SIZE)
+ CACHELINE_ALIGNED_DATA(SMP_CACHE_BYTES)
+ READ_MOSTLY_DATA(SMP_CACHE_BYTES)
DATA_DATA
*(.data1)
*(.gnu.linkonce.d*)
@@ -274,48 +222,15 @@ SECTIONS
.sdata : AT(ADDR(.sdata) - LOAD_OFFSET)
{ *(.sdata) *(.sdata1) *(.srdata) }
_edata = .;
- __bss_start = .;
- .sbss : AT(ADDR(.sbss) - LOAD_OFFSET)
- { *(.sbss) *(.scommon) }
- .bss : AT(ADDR(.bss) - LOAD_OFFSET)
- { *(.bss) *(COMMON) }
- __bss_stop = .;
+
+ BSS_SECTION(0, 0, 0)
_end = .;
code : { } :code
- /* Stabs debugging sections. */
- .stab 0 : { *(.stab) }
- .stabstr 0 : { *(.stabstr) }
- .stab.excl 0 : { *(.stab.excl) }
- .stab.exclstr 0 : { *(.stab.exclstr) }
- .stab.index 0 : { *(.stab.index) }
- .stab.indexstr 0 : { *(.stab.indexstr) }
- /* DWARF debug sections.
- Symbols in the DWARF debugging sections are relative to the beginning
- of the section so we begin them at 0. */
- /* DWARF 1 */
- .debug 0 : { *(.debug) }
- .line 0 : { *(.line) }
- /* GNU DWARF 1 extensions */
- .debug_srcinfo 0 : { *(.debug_srcinfo) }
- .debug_sfnames 0 : { *(.debug_sfnames) }
- /* DWARF 1.1 and DWARF 2 */
- .debug_aranges 0 : { *(.debug_aranges) }
- .debug_pubnames 0 : { *(.debug_pubnames) }
- /* DWARF 2 */
- .debug_info 0 : { *(.debug_info) }
- .debug_abbrev 0 : { *(.debug_abbrev) }
- .debug_line 0 : { *(.debug_line) }
- .debug_frame 0 : { *(.debug_frame) }
- .debug_str 0 : { *(.debug_str) }
- .debug_loc 0 : { *(.debug_loc) }
- .debug_macinfo 0 : { *(.debug_macinfo) }
- /* SGI/MIPS DWARF 2 extensions */
- .debug_weaknames 0 : { *(.debug_weaknames) }
- .debug_funcnames 0 : { *(.debug_funcnames) }
- .debug_typenames 0 : { *(.debug_typenames) }
- .debug_varnames 0 : { *(.debug_varnames) }
+
+ STABS_DEBUG
+ DWARF_DEBUG
/* Default discards */
DISCARDS
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-21 21:37:37 +0000