1 files changed, 74 insertions, 0 deletions
diff --git a/arch/x86/kvm/tss.h b/arch/x86/kvm/tss.h
new file mode 100644
index 000000000..55ced8975
--- /dev/null
+++ b/arch/x86/kvm/tss.h
@@ -0,0 +1,74 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __TSS_SEGMENT_H
+#define __TSS_SEGMENT_H
+
+#include <linux/build_bug.h>
+#include <linux/stddef.h>
+#include <linux/types.h>
+
+struct tss_segment_32 {
+	u32 prev_task_link;
+	u32 esp0;
+	u32 ss0;
+	u32 esp1;
+	u32 ss1;
+	u32 esp2;
+	u32 ss2;
+	u32 cr3;
+	u32 eip;
+	u32 eflags;
+	u32 eax;
+	u32 ecx;
+	u32 edx;
+	u32 ebx;
+	u32 esp;
+	u32 ebp;
+	u32 esi;
+	u32 edi;
+	u32 es;
+	u32 cs;
+	u32 ss;
+	u32 ds;
+	u32 fs;
+	u32 gs;
+	u32 ldt_selector;
+	u16 t;
+	u16 io_map;
+};
+
+struct tss_segment_16 {
+	u16 prev_task_link;
+	u16 sp0;
+	u16 ss0;
+	u16 sp1;
+	u16 ss1;
+	u16 sp2;
+	u16 ss2;
+	u16 ip;
+	u16 flag;
+	u16 ax;
+	u16 cx;
+	u16 dx;
+	u16 bx;
+	u16 sp;
+	u16 bp;
+	u16 si;
+	u16 di;
+	u16 es;
+	u16 cs;
+	u16 ss;
+	u16 ds;
+	u16 ldt;
+};
+
+#define TSS_IOPB_BASE_OFFSET 0x66
+#define TSS_BASE_SIZE 0x68
+#define TSS_IOPB_SIZE (65536 / 8)
+#define TSS_REDIRECTION_SIZE (256 / 8)
+#define RMODE_TSS_SIZE							\
+	(TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1)
+
+static_assert(offsetof(struct tss_segment_32, io_map) == TSS_IOPB_BASE_OFFSET);
+static_assert(sizeof(struct tss_segment_32) == TSS_BASE_SIZE);
+
+#endif