Adding upstream version 4.19.249.upstream/4.19.249

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

1 files changed, 64 insertions, 0 deletions

diff --git a/arch/x86/include/asm/suspend_64.h b/arch/x86/include/asm/suspend_64.h
new file mode 100644
index 000000000..b2861400c
--- /dev/null
+++ b/arch/x86/include/asm/suspend_64.h
@@ -0,0 +1,64 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright 2001-2003 Pavel Machek <pavel@suse.cz>
+ * Based on code
+ * Copyright 2001 Patrick Mochel <mochel@osdl.org>
+ */
+#ifndef _ASM_X86_SUSPEND_64_H
+#define _ASM_X86_SUSPEND_64_H
+
+#include <asm/desc.h>
+#include <asm/fpu/api.h>
+
+/*
+ * Image of the saved processor state, used by the low level ACPI suspend to
+ * RAM code and by the low level hibernation code.
+ *
+ * If you modify it, check how it is used in arch/x86/kernel/acpi/wakeup_64.S
+ * and make sure that __save/__restore_processor_state(), defined in
+ * arch/x86/power/cpu.c, still work as required.
+ *
+ * Because the structure is packed, make sure to avoid unaligned members. For
+ * optimisation purposes but also because tools like kmemleak only search for
+ * pointers that are aligned.
+ */
+struct saved_context {
+	struct pt_regs regs;
+
+	/*
+	 * User CS and SS are saved in current_pt_regs().  The rest of the
+	 * segment selectors need to be saved and restored here.
+	 */
+	u16 ds, es, fs, gs;
+
+	/*
+	 * Usermode FSBASE and GSBASE may not match the fs and gs selectors,
+	 * so we save them separately.  We save the kernelmode GSBASE to
+	 * restore percpu access after resume.
+	 */
+	unsigned long kernelmode_gs_base, usermode_gs_base, fs_base;
+
+	unsigned long cr0, cr2, cr3, cr4, cr8;
+	u64 misc_enable;
+	struct saved_msrs saved_msrs;
+	unsigned long efer;
+	u16 gdt_pad; /* Unused */
+	struct desc_ptr gdt_desc;
+	u16 idt_pad;
+	struct desc_ptr idt;
+	u16 ldt;
+	u16 tss;
+	unsigned long tr;
+	unsigned long safety;
+	unsigned long return_address;
+	bool misc_enable_saved;
+} __attribute__((packed));
+
+#define loaddebug(thread,register) \
+	set_debugreg((thread)->debugreg##register, register)
+
+/* routines for saving/restoring kernel state */
+extern char core_restore_code[];
+extern char restore_registers[];
+
+#endif /* _ASM_X86_SUSPEND_64_H */