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-rw-r--r--arch/s390/include/asm/ipl.h11
-rw-r--r--arch/s390/include/asm/lowcore.h21
-rw-r--r--arch/s390/kernel/crash_dump.c263
-rw-r--r--arch/s390/kernel/smp.c37
4 files changed, 140 insertions, 192 deletions
diff --git a/arch/s390/include/asm/ipl.h b/arch/s390/include/asm/ipl.h
index 1dc55db8cd81..6fc44dca193e 100644
--- a/arch/s390/include/asm/ipl.h
+++ b/arch/s390/include/asm/ipl.h
@@ -88,12 +88,11 @@ struct ipl_parameter_block {
*/
extern u32 ipl_flags;
-struct dump_save_areas {
- struct save_area_ext **areas;
- int count;
-};
-
-extern struct dump_save_areas dump_save_areas;
+struct save_area;
+struct save_area * __init save_area_alloc(bool is_boot_cpu);
+struct save_area * __init save_area_boot_cpu(void);
+void __init save_area_add_regs(struct save_area *, void *regs);
+void __init save_area_add_vxrs(struct save_area *, __vector128 *vxrs);
extern void do_reipl(void);
extern void do_halt(void);
diff --git a/arch/s390/include/asm/lowcore.h b/arch/s390/include/asm/lowcore.h
index afe1cfebf1a4..5dbbf199ba2e 100644
--- a/arch/s390/include/asm/lowcore.h
+++ b/arch/s390/include/asm/lowcore.h
@@ -16,27 +16,6 @@
#define LC_ORDER 1
#define LC_PAGES 2
-struct save_area {
- u64 fp_regs[16];
- u64 gp_regs[16];
- u8 psw[16];
- u8 pad1[8];
- u32 pref_reg;
- u32 fp_ctrl_reg;
- u8 pad2[4];
- u32 tod_reg;
- u64 timer;
- u64 clk_cmp;
- u8 pad3[8];
- u32 acc_regs[16];
- u64 ctrl_regs[16];
-} __packed;
-
-struct save_area_ext {
- struct save_area sa;
- __vector128 vx_regs[32];
-};
-
struct _lowcore {
__u8 pad_0x0000[0x0014-0x0000]; /* 0x0000 */
__u32 ipl_parmblock_ptr; /* 0x0014 */
diff --git a/arch/s390/kernel/crash_dump.c b/arch/s390/kernel/crash_dump.c
index 0d59c0705c4f..823ed6ab53c8 100644
--- a/arch/s390/kernel/crash_dump.c
+++ b/arch/s390/kernel/crash_dump.c
@@ -13,6 +13,7 @@
#include <linux/slab.h>
#include <linux/bootmem.h>
#include <linux/elf.h>
+#include <asm/asm-offsets.h>
#include <linux/memblock.h>
#include <asm/os_info.h>
#include <asm/elf.h>
@@ -32,7 +33,84 @@ static struct memblock_type oldmem_type = {
.regions = &oldmem_region,
};
-struct dump_save_areas dump_save_areas;
+struct save_area {
+ struct list_head list;
+ u64 psw[2];
+ u64 ctrs[16];
+ u64 gprs[16];
+ u32 acrs[16];
+ u64 fprs[16];
+ u32 fpc;
+ u32 prefix;
+ u64 todpreg;
+ u64 timer;
+ u64 todcmp;
+ u64 vxrs_low[16];
+ __vector128 vxrs_high[16];
+};
+
+static LIST_HEAD(dump_save_areas);
+
+/*
+ * Allocate a save area
+ */
+struct save_area * __init save_area_alloc(bool is_boot_cpu)
+{
+ struct save_area *sa;
+
+ sa = (void *) memblock_alloc(sizeof(*sa), 8);
+ if (!sa)
+ return NULL;
+ if (is_boot_cpu)
+ list_add(&sa->list, &dump_save_areas);
+ else
+ list_add_tail(&sa->list, &dump_save_areas);
+ return sa;
+}
+
+/*
+ * Return the address of the save area for the boot CPU
+ */
+struct save_area * __init save_area_boot_cpu(void)
+{
+ if (list_empty(&dump_save_areas))
+ return NULL;
+ return list_first_entry(&dump_save_areas, struct save_area, list);
+}
+
+/*
+ * Copy CPU registers into the save area
+ */
+void __init save_area_add_regs(struct save_area *sa, void *regs)
+{
+ struct _lowcore *lc;
+
+ lc = (struct _lowcore *)(regs - __LC_FPREGS_SAVE_AREA);
+ memcpy(&sa->psw, &lc->psw_save_area, sizeof(sa->psw));
+ memcpy(&sa->ctrs, &lc->cregs_save_area, sizeof(sa->ctrs));
+ memcpy(&sa->gprs, &lc->gpregs_save_area, sizeof(sa->gprs));
+ memcpy(&sa->acrs, &lc->access_regs_save_area, sizeof(sa->acrs));
+ memcpy(&sa->fprs, &lc->floating_pt_save_area, sizeof(sa->fprs));
+ memcpy(&sa->fpc, &lc->fpt_creg_save_area, sizeof(sa->fpc));
+ memcpy(&sa->prefix, &lc->prefixreg_save_area, sizeof(sa->prefix));
+ memcpy(&sa->todpreg, &lc->tod_progreg_save_area, sizeof(sa->todpreg));
+ memcpy(&sa->timer, &lc->cpu_timer_save_area, sizeof(sa->timer));
+ memcpy(&sa->todcmp, &lc->clock_comp_save_area, sizeof(sa->todcmp));
+}
+
+/*
+ * Copy vector registers into the save area
+ */
+void __init save_area_add_vxrs(struct save_area *sa, __vector128 *vxrs)
+{
+ int i;
+
+ /* Copy lower halves of vector registers 0-15 */
+ for (i = 0; i < 16; i++)
+ memcpy(&sa->vxrs_low[i], &vxrs[i].u[2], 8);
+ /* Copy vector registers 16-31 */
+ memcpy(sa->vxrs_high, vxrs + 16, 16 * sizeof(__vector128));
+}
/*
* Return physical address for virtual address
@@ -232,8 +310,8 @@ static void *kzalloc_panic(int len)
/*
* Initialize ELF note
*/
-static void *nt_init(void *buf, Elf64_Word type, void *desc, int d_len,
- const char *name)
+static void *nt_init_name(void *buf, Elf64_Word type, void *desc, int d_len,
+ const char *name)
{
Elf64_Nhdr *note;
u64 len;
@@ -253,137 +331,42 @@ static void *nt_init(void *buf, Elf64_Word type, void *desc, int d_len,
return PTR_ADD(buf, len);
}
-/*
- * Initialize prstatus note
- */
-static void *nt_prstatus(void *ptr, struct save_area *sa)
+static inline void *nt_init(void *buf, Elf64_Word type, void *desc, int d_len)
{
- struct elf_prstatus nt_prstatus;
- static int cpu_nr = 1;
-
- memset(&nt_prstatus, 0, sizeof(nt_prstatus));
- memcpy(&nt_prstatus.pr_reg.gprs, sa->gp_regs, sizeof(sa->gp_regs));
- memcpy(&nt_prstatus.pr_reg.psw, sa->psw, sizeof(sa->psw));
- memcpy(&nt_prstatus.pr_reg.acrs, sa->acc_regs, sizeof(sa->acc_regs));
- nt_prstatus.pr_pid = cpu_nr;
- cpu_nr++;
-
- return nt_init(ptr, NT_PRSTATUS, &nt_prstatus, sizeof(nt_prstatus),
- "CORE");
+ return nt_init_name(buf, type, desc, d_len, KEXEC_CORE_NOTE_NAME);
}
/*
- * Initialize fpregset (floating point) note
+ * Fill ELF notes for one CPU with save area registers
*/
-static void *nt_fpregset(void *ptr, struct save_area *sa)
+static void *fill_cpu_elf_notes(void *ptr, int cpu, struct save_area *sa)
{
+ struct elf_prstatus nt_prstatus;
elf_fpregset_t nt_fpregset;
+ /* Prepare prstatus note */
+ memset(&nt_prstatus, 0, sizeof(nt_prstatus));
+ memcpy(&nt_prstatus.pr_reg.gprs, sa->gprs, sizeof(sa->gprs));
+ memcpy(&nt_prstatus.pr_reg.psw, sa->psw, sizeof(sa->psw));
+ memcpy(&nt_prstatus.pr_reg.acrs, sa->acrs, sizeof(sa->acrs));
+ nt_prstatus.pr_pid = cpu;
+ /* Prepare fpregset (floating point) note */
memset(&nt_fpregset, 0, sizeof(nt_fpregset));
- memcpy(&nt_fpregset.fpc, &sa->fp_ctrl_reg, sizeof(sa->fp_ctrl_reg));
- memcpy(&nt_fpregset.fprs, &sa->fp_regs, sizeof(sa->fp_regs));
-
- return nt_init(ptr, NT_PRFPREG, &nt_fpregset, sizeof(nt_fpregset),
- "CORE");
-}
-
-/*
- * Initialize timer note
- */
-static void *nt_s390_timer(void *ptr, struct save_area *sa)
-{
- return nt_init(ptr, NT_S390_TIMER, &sa->timer, sizeof(sa->timer),
- KEXEC_CORE_NOTE_NAME);
-}
-
-/*
- * Initialize TOD clock comparator note
- */
-static void *nt_s390_tod_cmp(void *ptr, struct save_area *sa)
-{
- return nt_init(ptr, NT_S390_TODCMP, &sa->clk_cmp,
- sizeof(sa->clk_cmp), KEXEC_CORE_NOTE_NAME);
-}
-
-/*
- * Initialize TOD programmable register note
- */
-static void *nt_s390_tod_preg(void *ptr, struct save_area *sa)
-{
- return nt_init(ptr, NT_S390_TODPREG, &sa->tod_reg,
- sizeof(sa->tod_reg), KEXEC_CORE_NOTE_NAME);
-}
-
-/*
- * Initialize control register note
- */
-static void *nt_s390_ctrs(void *ptr, struct save_area *sa)
-{
- return nt_init(ptr, NT_S390_CTRS, &sa->ctrl_regs,
- sizeof(sa->ctrl_regs), KEXEC_CORE_NOTE_NAME);
-}
-
-/*
- * Initialize prefix register note
- */
-static void *nt_s390_prefix(void *ptr, struct save_area *sa)
-{
- return nt_init(ptr, NT_S390_PREFIX, &sa->pref_reg,
- sizeof(sa->pref_reg), KEXEC_CORE_NOTE_NAME);
-}
-
-/*
- * Initialize vxrs high note (full 128 bit VX registers 16-31)
- */
-static void *nt_s390_vx_high(void *ptr, __vector128 *vx_regs)
-{
- return nt_init(ptr, NT_S390_VXRS_HIGH, &vx_regs[16],
- 16 * sizeof(__vector128), KEXEC_CORE_NOTE_NAME);
-}
-
-/*
- * Initialize vxrs low note (lower halves of VX registers 0-15)
- */
-static void *nt_s390_vx_low(void *ptr, __vector128 *vx_regs)
-{
- Elf64_Nhdr *note;
- u64 len;
- int i;
-
- note = (Elf64_Nhdr *)ptr;
- note->n_namesz = strlen(KEXEC_CORE_NOTE_NAME) + 1;
- note->n_descsz = 16 * 8;
- note->n_type = NT_S390_VXRS_LOW;
- len = sizeof(Elf64_Nhdr);
-
- memcpy(ptr + len, KEXEC_CORE_NOTE_NAME, note->n_namesz);
- len = roundup(len + note->n_namesz, 4);
-
- ptr += len;
- /* Copy lower halves of SIMD registers 0-15 */
- for (i = 0; i < 16; i++) {
- memcpy(ptr, &vx_regs[i].u[2], 8);
- ptr += 8;
- }
- return ptr;
-}
-
-/*
- * Fill ELF notes for one CPU with save area registers
- */
-static void *fill_cpu_elf_notes(void *ptr, struct save_area *sa,
- __vector128 *vx_regs)
-{
- ptr = nt_prstatus(ptr, sa);
- ptr = nt_fpregset(ptr, sa);
- ptr = nt_s390_timer(ptr, sa);
- ptr = nt_s390_tod_cmp(ptr, sa);
- ptr = nt_s390_tod_preg(ptr, sa);
- ptr = nt_s390_ctrs(ptr, sa);
- ptr = nt_s390_prefix(ptr, sa);
- if (MACHINE_HAS_VX && vx_regs) {
- ptr = nt_s390_vx_low(ptr, vx_regs);
- ptr = nt_s390_vx_high(ptr, vx_regs);
+ memcpy(&nt_fpregset.fpc, &sa->fpc, sizeof(sa->fpc));
+ memcpy(&nt_fpregset.fprs, &sa->fprs, sizeof(sa->fprs));
+ /* Create ELF notes for the CPU */
+ ptr = nt_init(ptr, NT_PRSTATUS, &nt_prstatus, sizeof(nt_prstatus));
+ ptr = nt_init(ptr, NT_PRFPREG, &nt_fpregset, sizeof(nt_fpregset));
+ ptr = nt_init(ptr, NT_S390_TIMER, &sa->timer, sizeof(sa->timer));
+ ptr = nt_init(ptr, NT_S390_TODCMP, &sa->todcmp, sizeof(sa->todcmp));
+ ptr = nt_init(ptr, NT_S390_TODPREG, &sa->todpreg, sizeof(sa->todpreg));
+ ptr = nt_init(ptr, NT_S390_CTRS, &sa->ctrs, sizeof(sa->ctrs));
+ ptr = nt_init(ptr, NT_S390_PREFIX, &sa->prefix, sizeof(sa->prefix));
+ if (MACHINE_HAS_VX) {
+ ptr = nt_init(ptr, NT_S390_VXRS_HIGH,
+ &sa->vxrs_high, sizeof(sa->vxrs_high));
+ ptr = nt_init(ptr, NT_S390_VXRS_LOW,
+ &sa->vxrs_low, sizeof(sa->vxrs_low));
}
return ptr;
}
@@ -398,8 +381,7 @@ static void *nt_prpsinfo(void *ptr)
memset(&prpsinfo, 0, sizeof(prpsinfo));
prpsinfo.pr_sname = 'R';
strcpy(prpsinfo.pr_fname, "vmlinux");
- return nt_init(ptr, NT_PRPSINFO, &prpsinfo, sizeof(prpsinfo),
- KEXEC_CORE_NOTE_NAME);
+ return nt_init(ptr, NT_PRPSINFO, &prpsinfo, sizeof(prpsinfo));
}
/*
@@ -441,7 +423,7 @@ static void *nt_vmcoreinfo(void *ptr)
vmcoreinfo = get_vmcoreinfo_old(&size);
if (!vmcoreinfo)
return ptr;
- return nt_init(ptr, 0, vmcoreinfo, size, "VMCOREINFO");
+ return nt_init_name(ptr, 0, vmcoreinfo, size, "VMCOREINFO");
}
/*
@@ -470,13 +452,12 @@ static void *ehdr_init(Elf64_Ehdr *ehdr, int mem_chunk_cnt)
*/
static int get_cpu_cnt(void)
{
- int i, cpus = 0;
+ struct save_area *sa;
+ int cpus = 0;
- for (i = 0; i < dump_save_areas.count; i++) {
- if (dump_save_areas.areas[i]->sa.pref_reg == 0)
- continue;
- cpus++;
- }
+ list_for_each_entry(sa, &dump_save_areas, list)
+ if (sa->prefix != 0)
+ cpus++;
return cpus;
}
@@ -521,18 +502,16 @@ static void loads_init(Elf64_Phdr *phdr, u64 loads_offset)
*/
static void *notes_init(Elf64_Phdr *phdr, void *ptr, u64 notes_offset)
{
- struct save_area_ext *sa_ext;
+ struct save_area *sa;
void *ptr_start = ptr;
- int i;
+ int cpu;
ptr = nt_prpsinfo(ptr);
- for (i = 0; i < dump_save_areas.count; i++) {
- sa_ext = dump_save_areas.areas[i];
- if (sa_ext->sa.pref_reg == 0)
- continue;
- ptr = fill_cpu_elf_notes(ptr, &sa_ext->sa, sa_ext->vx_regs);
- }
+ cpu = 1;
+ list_for_each_entry(sa, &dump_save_areas, list)
+ if (sa->prefix != 0)
+ ptr = fill_cpu_elf_notes(ptr, cpu++, sa);
ptr = nt_vmcoreinfo(ptr);
memset(phdr, 0, sizeof(*phdr));
phdr->p_type = PT_NOTE;
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index 2a69077d482c..9da95d8dfc62 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -585,7 +585,7 @@ int smp_store_status(int cpu)
* This case does not exist for s390 anymore, setup_arch explicitly
* deactivates the elfcorehdr= kernel parameter
*/
-static __init void smp_save_cpu_vxrs(struct save_area_ext *sa_ext, u16 addr,
+static __init void smp_save_cpu_vxrs(struct save_area *sa, u16 addr,
bool is_boot_cpu, unsigned long page)
{
__vector128 *vxrs = (__vector128 *) page;
@@ -594,10 +594,10 @@ static __init void smp_save_cpu_vxrs(struct save_area_ext *sa_ext, u16 addr,
vxrs = boot_cpu_vector_save_area;
else
__pcpu_sigp_relax(addr, SIGP_STORE_ADDITIONAL_STATUS, page);
- memcpy(&sa_ext->vx_regs, vxrs, sizeof(sa_ext->vx_regs));
+ save_area_add_vxrs(sa, vxrs);
}
-static __init void smp_save_cpu_regs(struct save_area_ext *sa_ext, u16 addr,
+static __init void smp_save_cpu_regs(struct save_area *sa, u16 addr,
bool is_boot_cpu, unsigned long page)
{
void *regs = (void *) page;
@@ -606,13 +606,13 @@ static __init void smp_save_cpu_regs(struct save_area_ext *sa_ext, u16 addr,
copy_oldmem_kernel(regs, (void *) __LC_FPREGS_SAVE_AREA, 512);
else
__pcpu_sigp_relax(addr, SIGP_STORE_STATUS_AT_ADDRESS, page);
- memcpy(&sa_ext->sa, regs, sizeof(sa_ext->sa));
+ save_area_add_regs(sa, regs);
}
void __init smp_save_dump_cpus(void)
{
- int addr, cpu, boot_cpu_addr, max_cpu_addr;
- struct save_area_ext *sa_ext;
+ int addr, boot_cpu_addr, max_cpu_addr;
+ struct save_area *sa;
unsigned long page;
bool is_boot_cpu;
@@ -625,29 +625,20 @@ void __init smp_save_dump_cpus(void)
panic("could not allocate memory for save area\n");
/* Set multi-threading state to the previous system. */
pcpu_set_smt(sclp.mtid_prev);
- max_cpu_addr = SCLP_MAX_CORES << sclp.mtid_prev;
- for (cpu = 0, addr = 0; addr <= max_cpu_addr; addr++) {
- if (__pcpu_sigp_relax(addr, SIGP_SENSE, 0) ==
- SIGP_CC_NOT_OPERATIONAL)
- continue;
- cpu += 1;
- }
- dump_save_areas.areas = (void *)memblock_alloc(sizeof(void *) * cpu, 8);
- dump_save_areas.count = cpu;
boot_cpu_addr = stap();
- for (cpu = 0, addr = 0; addr <= max_cpu_addr; addr++) {
+ max_cpu_addr = SCLP_MAX_CORES << sclp.mtid_prev;
+ for (addr = 0; addr <= max_cpu_addr; addr++) {
if (__pcpu_sigp_relax(addr, SIGP_SENSE, 0) ==
SIGP_CC_NOT_OPERATIONAL)
continue;
- sa_ext = (void *) memblock_alloc(sizeof(*sa_ext), 8);
- dump_save_areas.areas[cpu] = sa_ext;
- if (!sa_ext)
- panic("could not allocate memory for save area\n");
is_boot_cpu = (addr == boot_cpu_addr);
- cpu += 1;
+ /* Allocate save area */
+ sa = save_area_alloc(is_boot_cpu);
+ if (!sa)
+ panic("could not allocate memory for save area\n");
if (MACHINE_HAS_VX)
/* Get the vector registers */
- smp_save_cpu_vxrs(sa_ext, addr, is_boot_cpu, page);
+ smp_save_cpu_vxrs(sa, addr, is_boot_cpu, page);
/*
* For a zfcp dump OLDMEM_BASE == NULL and the registers
* of the boot CPU are stored in the HSA. To retrieve
@@ -656,7 +647,7 @@ void __init smp_save_dump_cpus(void)
*/
if (!is_boot_cpu || OLDMEM_BASE)
/* Get the CPU registers */
- smp_save_cpu_regs(sa_ext, addr, is_boot_cpu, page);
+ smp_save_cpu_regs(sa, addr, is_boot_cpu, page);
}
memblock_free(page, PAGE_SIZE);
diag308_reset();
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-30 15:13:54 +0000