Adding upstream version 6.6.15.upstream/6.6.15

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

1 files changed, 163 insertions, 0 deletions

diff --git a/arch/ia64/kernel/machine_kexec.c b/arch/ia64/kernel/machine_kexec.c
new file mode 100644
index 0000000000..4db9ca144f
--- /dev/null
+++ b/arch/ia64/kernel/machine_kexec.c
@@ -0,0 +1,163 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * arch/ia64/kernel/machine_kexec.c
+ *
+ * Handle transition of Linux booting another kernel
+ * Copyright (C) 2005 Hewlett-Packard Development Comapny, L.P.
+ * Copyright (C) 2005 Khalid Aziz <khalid.aziz@hp.com>
+ * Copyright (C) 2006 Intel Corp, Zou Nan hai <nanhai.zou@intel.com>
+ */
+
+#include <linux/mm.h>
+#include <linux/kexec.h>
+#include <linux/cpu.h>
+#include <linux/irq.h>
+#include <linux/efi.h>
+#include <linux/numa.h>
+#include <linux/mmzone.h>
+
+#include <asm/efi.h>
+#include <asm/numa.h>
+#include <asm/mmu_context.h>
+#include <asm/setup.h>
+#include <asm/delay.h>
+#include <asm/meminit.h>
+#include <asm/processor.h>
+#include <asm/sal.h>
+#include <asm/mca.h>
+
+typedef void (*relocate_new_kernel_t)(
+					unsigned long indirection_page,
+					unsigned long start_address,
+					struct ia64_boot_param *boot_param,
+					unsigned long pal_addr) __noreturn;
+
+struct kimage *ia64_kimage;
+
+struct resource efi_memmap_res = {
+        .name  = "EFI Memory Map",
+        .start = 0,
+        .end   = 0,
+        .flags = IORESOURCE_BUSY | IORESOURCE_MEM
+};
+
+struct resource boot_param_res = {
+        .name  = "Boot parameter",
+        .start = 0,
+        .end   = 0,
+        .flags = IORESOURCE_BUSY | IORESOURCE_MEM
+};
+
+
+/*
+ * Do what every setup is needed on image and the
+ * reboot code buffer to allow us to avoid allocations
+ * later.
+ */
+int machine_kexec_prepare(struct kimage *image)
+{
+	void *control_code_buffer;
+	const unsigned long *func;
+
+	func = (unsigned long *)&relocate_new_kernel;
+	/* Pre-load control code buffer to minimize work in kexec path */
+	control_code_buffer = page_address(image->control_code_page);
+	memcpy((void *)control_code_buffer, (const void *)func[0],
+			relocate_new_kernel_size);
+	flush_icache_range((unsigned long)control_code_buffer,
+			(unsigned long)control_code_buffer + relocate_new_kernel_size);
+	ia64_kimage = image;
+
+	return 0;
+}
+
+void machine_kexec_cleanup(struct kimage *image)
+{
+}
+
+/*
+ * Do not allocate memory (or fail in any way) in machine_kexec().
+ * We are past the point of no return, committed to rebooting now.
+ */
+static void ia64_machine_kexec(struct unw_frame_info *info, void *arg)
+{
+	struct kimage *image = arg;
+	relocate_new_kernel_t rnk;
+	void *pal_addr = efi_get_pal_addr();
+	unsigned long code_addr;
+	int ii;
+	u64 fp, gp;
+	ia64_fptr_t *init_handler = (ia64_fptr_t *)ia64_os_init_on_kdump;
+
+	BUG_ON(!image);
+	code_addr = (unsigned long)page_address(image->control_code_page);
+	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();
+
+	/* Mask CMC and Performance Monitor interrupts */
+	ia64_setreg(_IA64_REG_CR_PMV, 1 << 16);
+	ia64_setreg(_IA64_REG_CR_CMCV, 1 << 16);
+
+	/* Mask ITV and Local Redirect Registers */
+	ia64_set_itv(1 << 16);
+	ia64_set_lrr0(1 << 16);
+	ia64_set_lrr1(1 << 16);
+
+	/* terminate possible nested in-service interrupts */
+	for (ii = 0; ii < 16; ii++)
+		ia64_eoi();
+
+	/* unmask TPR and clear any pending interrupts */
+	ia64_setreg(_IA64_REG_CR_TPR, 0);
+	ia64_srlz_d();
+	while (ia64_get_ivr() != IA64_SPURIOUS_INT_VECTOR)
+		ia64_eoi();
+	rnk = (relocate_new_kernel_t)&code_addr;
+	(*rnk)(image->head, image->start, ia64_boot_param,
+		     GRANULEROUNDDOWN((unsigned long) pal_addr));
+	BUG();
+}
+
+void machine_kexec(struct kimage *image)
+{
+	BUG_ON(!image);
+	unw_init_running(ia64_machine_kexec, image);
+	for(;;);
+}
+
+void arch_crash_save_vmcoreinfo(void)
+{
+#if defined(CONFIG_SPARSEMEM)
+	VMCOREINFO_SYMBOL(pgdat_list);
+	VMCOREINFO_LENGTH(pgdat_list, MAX_NUMNODES);
+#endif
+#ifdef CONFIG_NUMA
+	VMCOREINFO_SYMBOL(node_memblk);
+	VMCOREINFO_LENGTH(node_memblk, NR_NODE_MEMBLKS);
+	VMCOREINFO_STRUCT_SIZE(node_memblk_s);
+	VMCOREINFO_OFFSET(node_memblk_s, start_paddr);
+	VMCOREINFO_OFFSET(node_memblk_s, size);
+#endif
+#if CONFIG_PGTABLE_LEVELS == 3
+	VMCOREINFO_CONFIG(PGTABLE_3);
+#elif CONFIG_PGTABLE_LEVELS == 4
+	VMCOREINFO_CONFIG(PGTABLE_4);
+#endif
+}
+