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| author | James Morris <james.l.morris@oracle.com> | 2017-12-11 17:01:08 +1100 |
|---|---|---|
| committer | James Morris <james.l.morris@oracle.com> | 2017-12-11 17:01:08 +1100 |
| commit | d21bd6898336a7892914d308d5e0868f0b863571 (patch) | |
| tree | f5f756c25348b5a6c1ce9ddbaa7d1ecd1bef40b0 /arch/x86/include/asm/segment.h | |
| parent | 34d8751fd4ffa34e85ee7e85d34168b3f3f62b42 (diff) | |
| parent | 50c4c4e268a2d7a3e58ebb698ac74da0de40ae36 (diff) | |
Sync to v4.15-rc3 for security subsystem developers to work against.
Diffstat (limited to 'arch/x86/include/asm/segment.h')
| -rw-r--r-- | arch/x86/include/asm/segment.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/x86/include/asm/segment.h b/arch/x86/include/asm/segment.h index 066aaf813141..8f09012b92e7 100644 --- a/arch/x86/include/asm/segment.h +++ b/arch/x86/include/asm/segment.h @@ -1,3 +1,4 @@ +/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _ASM_X86_SEGMENT_H #define _ASM_X86_SEGMENT_H @@ -235,11 +236,23 @@ */ #define EARLY_IDT_HANDLER_SIZE 9 +/* + * xen_early_idt_handler_array is for Xen pv guests: for each entry in + * early_idt_handler_array it contains a prequel in the form of + * pop %rcx; pop %r11; jmp early_idt_handler_array[i]; summing up to + * max 8 bytes. + */ +#define XEN_EARLY_IDT_HANDLER_SIZE 8 + #ifndef __ASSEMBLY__ extern const char early_idt_handler_array[NUM_EXCEPTION_VECTORS][EARLY_IDT_HANDLER_SIZE]; extern void early_ignore_irq(void); +#if defined(CONFIG_X86_64) && defined(CONFIG_XEN_PV) +extern const char xen_early_idt_handler_array[NUM_EXCEPTION_VECTORS][XEN_EARLY_IDT_HANDLER_SIZE]; +#endif + /* * Load a segment. Fall back on loading the zero segment if something goes * wrong. This variant assumes that loading zero fully clears the segment. |