Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 180 insertions, 0 deletions

diff --git a/arch/s390/boot/pgm_check_info.c b/arch/s390/boot/pgm_check_info.c
new file mode 100644
index 000000000..c2a1defc7
--- /dev/null
+++ b/arch/s390/boot/pgm_check_info.c
@@ -0,0 +1,180 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/kernel.h>
+#include <linux/stdarg.h>
+#include <linux/string.h>
+#include <linux/ctype.h>
+#include <asm/stacktrace.h>
+#include <asm/boot_data.h>
+#include <asm/lowcore.h>
+#include <asm/setup.h>
+#include <asm/sclp.h>
+#include <asm/uv.h>
+#include "boot.h"
+
+const char hex_asc[] = "0123456789abcdef";
+
+static char *as_hex(char *dst, unsigned long val, int pad)
+{
+	char *p, *end = p = dst + max(pad, (int)__fls(val | 1) / 4 + 1);
+
+	for (*p-- = 0; p >= dst; val >>= 4)
+		*p-- = hex_asc[val & 0x0f];
+	return end;
+}
+
+static char *symstart(char *p)
+{
+	while (*p)
+		p--;
+	return p + 1;
+}
+
+static noinline char *findsym(unsigned long ip, unsigned short *off, unsigned short *len)
+{
+	/* symbol entries are in a form "10000 c4 startup\0" */
+	char *a = _decompressor_syms_start;
+	char *b = _decompressor_syms_end;
+	unsigned long start;
+	unsigned long size;
+	char *pivot;
+	char *endp;
+
+	while (a < b) {
+		pivot = symstart(a + (b - a) / 2);
+		start = simple_strtoull(pivot, &endp, 16);
+		size = simple_strtoull(endp + 1, &endp, 16);
+		if (ip < start) {
+			b = pivot;
+			continue;
+		}
+		if (ip > start + size) {
+			a = pivot + strlen(pivot) + 1;
+			continue;
+		}
+		*off = ip - start;
+		*len = size;
+		return endp + 1;
+	}
+	return NULL;
+}
+
+static noinline char *strsym(void *ip)
+{
+	static char buf[64];
+	unsigned short off;
+	unsigned short len;
+	char *p;
+
+	p = findsym((unsigned long)ip, &off, &len);
+	if (p) {
+		strncpy(buf, p, sizeof(buf));
+		/* reserve 15 bytes for offset/len in symbol+0x1234/0x1234 */
+		p = buf + strnlen(buf, sizeof(buf) - 15);
+		strcpy(p, "+0x");
+		p = as_hex(p + 3, off, 0);
+		strcpy(p, "/0x");
+		as_hex(p + 3, len, 0);
+	} else {
+		as_hex(buf, (unsigned long)ip, 16);
+	}
+	return buf;
+}
+
+void decompressor_printk(const char *fmt, ...)
+{
+	char buf[1024] = { 0 };
+	char *end = buf + sizeof(buf) - 1; /* make sure buf is 0 terminated */
+	unsigned long pad;
+	char *p = buf;
+	va_list args;
+
+	va_start(args, fmt);
+	for (; p < end && *fmt; fmt++) {
+		if (*fmt != '%') {
+			*p++ = *fmt;
+			continue;
+		}
+		pad = isdigit(*++fmt) ? simple_strtol(fmt, (char **)&fmt, 10) : 0;
+		switch (*fmt) {
+		case 's':
+			p = buf + strlcat(buf, va_arg(args, char *), sizeof(buf));
+			break;
+		case 'p':
+			if (*++fmt != 'S')
+				goto out;
+			p = buf + strlcat(buf, strsym(va_arg(args, void *)), sizeof(buf));
+			break;
+		case 'l':
+			if (*++fmt != 'x' || end - p <= max(sizeof(long) * 2, pad))
+				goto out;
+			p = as_hex(p, va_arg(args, unsigned long), pad);
+			break;
+		case 'x':
+			if (end - p <= max(sizeof(int) * 2, pad))
+				goto out;
+			p = as_hex(p, va_arg(args, unsigned int), pad);
+			break;
+		default:
+			goto out;
+		}
+	}
+out:
+	va_end(args);
+	sclp_early_printk(buf);
+}
+
+static noinline void print_stacktrace(void)
+{
+	struct stack_info boot_stack = { STACK_TYPE_TASK, (unsigned long)_stack_start,
+					 (unsigned long)_stack_end };
+	unsigned long sp = S390_lowcore.gpregs_save_area[15];
+	bool first = true;
+
+	decompressor_printk("Call Trace:\n");
+	while (!(sp & 0x7) && on_stack(&boot_stack, sp, sizeof(struct stack_frame))) {
+		struct stack_frame *sf = (struct stack_frame *)sp;
+
+		decompressor_printk(first ? "(sp:%016lx [<%016lx>] %pS)\n" :
+					    " sp:%016lx [<%016lx>] %pS\n",
+				    sp, sf->gprs[8], (void *)sf->gprs[8]);
+		if (sf->back_chain <= sp)
+			break;
+		sp = sf->back_chain;
+		first = false;
+	}
+}
+
+void print_pgm_check_info(void)
+{
+	unsigned long *gpregs = (unsigned long *)S390_lowcore.gpregs_save_area;
+	struct psw_bits *psw = &psw_bits(S390_lowcore.psw_save_area);
+
+	decompressor_printk("Linux version %s\n", kernel_version);
+	if (!is_prot_virt_guest() && early_command_line[0])
+		decompressor_printk("Kernel command line: %s\n", early_command_line);
+	decompressor_printk("Kernel fault: interruption code %04x ilc:%x\n",
+			    S390_lowcore.pgm_code, S390_lowcore.pgm_ilc >> 1);
+	if (kaslr_enabled)
+		decompressor_printk("Kernel random base: %lx\n", __kaslr_offset);
+	decompressor_printk("PSW : %016lx %016lx (%pS)\n",
+			    S390_lowcore.psw_save_area.mask,
+			    S390_lowcore.psw_save_area.addr,
+			    (void *)S390_lowcore.psw_save_area.addr);
+	decompressor_printk(
+		"      R:%x T:%x IO:%x EX:%x Key:%x M:%x W:%x P:%x AS:%x CC:%x PM:%x RI:%x EA:%x\n",
+		psw->per, psw->dat, psw->io, psw->ext, psw->key, psw->mcheck,
+		psw->wait, psw->pstate, psw->as, psw->cc, psw->pm, psw->ri,
+		psw->eaba);
+	decompressor_printk("GPRS: %016lx %016lx %016lx %016lx\n",
+			    gpregs[0], gpregs[1], gpregs[2], gpregs[3]);
+	decompressor_printk("      %016lx %016lx %016lx %016lx\n",
+			    gpregs[4], gpregs[5], gpregs[6], gpregs[7]);
+	decompressor_printk("      %016lx %016lx %016lx %016lx\n",
+			    gpregs[8], gpregs[9], gpregs[10], gpregs[11]);
+	decompressor_printk("      %016lx %016lx %016lx %016lx\n",
+			    gpregs[12], gpregs[13], gpregs[14], gpregs[15]);
+	print_stacktrace();
+	decompressor_printk("Last Breaking-Event-Address:\n");
+	decompressor_printk(" [<%016lx>] %pS\n", (unsigned long)S390_lowcore.pgm_last_break,
+			    (void *)S390_lowcore.pgm_last_break);
+}