// SPDX-License-Identifier: GPL-2.0-only #include <asm/trap_pf.h> #include <asm/segment.h> #include <asm/trapnr.h> #include "misc.h" static void set_idt_entry(int vector, void (*handler)(void)) { unsigned long address = (unsigned long)handler; gate_desc entry; memset(&entry, 0, sizeof(entry)); entry.offset_low = (u16)(address & 0xffff); entry.segment = __KERNEL_CS; entry.bits.type = GATE_TRAP; entry.bits.p = 1; entry.offset_middle = (u16)((address >> 16) & 0xffff); entry.offset_high = (u32)(address >> 32); memcpy(&boot_idt[vector], &entry, sizeof(entry)); } /* Have this here so we don't need to include <asm/desc.h> */ static void load_boot_idt(const struct desc_ptr *dtr) { asm volatile("lidt %0"::"m" (*dtr)); } /* Setup IDT before kernel jumping to .Lrelocated */ void load_stage1_idt(void) { boot_idt_desc.address = (unsigned long)boot_idt; if (IS_ENABLED(CONFIG_AMD_MEM_ENCRYPT)) set_idt_entry(X86_TRAP_VC, boot_stage1_vc); load_boot_idt(&boot_idt_desc); } /* Setup IDT after kernel jumping to .Lrelocated */ void load_stage2_idt(void) { boot_idt_desc.address = (unsigned long)boot_idt; set_idt_entry(X86_TRAP_PF, boot_page_fault); #ifdef CONFIG_AMD_MEM_ENCRYPT set_idt_entry(X86_TRAP_VC, boot_stage2_vc); #endif load_boot_idt(&boot_idt_desc); }