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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /arch/x86/include/asm/desc_defs.h
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/x86/include/asm/desc_defs.h')
-rw-r--r--arch/x86/include/asm/desc_defs.h145
1 files changed, 145 insertions, 0 deletions
diff --git a/arch/x86/include/asm/desc_defs.h b/arch/x86/include/asm/desc_defs.h
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+++ b/arch/x86/include/asm/desc_defs.h
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+/* SPDX-License-Identifier: GPL-2.0 */
+/* Written 2000 by Andi Kleen */
+#ifndef _ASM_X86_DESC_DEFS_H
+#define _ASM_X86_DESC_DEFS_H
+
+/*
+ * Segment descriptor structure definitions, usable from both x86_64 and i386
+ * archs.
+ */
+
+#ifndef __ASSEMBLY__
+
+#include <linux/types.h>
+
+/* 8 byte segment descriptor */
+struct desc_struct {
+ u16 limit0;
+ u16 base0;
+ u16 base1: 8, type: 4, s: 1, dpl: 2, p: 1;
+ u16 limit1: 4, avl: 1, l: 1, d: 1, g: 1, base2: 8;
+} __attribute__((packed));
+
+#define GDT_ENTRY_INIT(flags, base, limit) \
+ { \
+ .limit0 = (u16) (limit), \
+ .limit1 = ((limit) >> 16) & 0x0F, \
+ .base0 = (u16) (base), \
+ .base1 = ((base) >> 16) & 0xFF, \
+ .base2 = ((base) >> 24) & 0xFF, \
+ .type = (flags & 0x0f), \
+ .s = (flags >> 4) & 0x01, \
+ .dpl = (flags >> 5) & 0x03, \
+ .p = (flags >> 7) & 0x01, \
+ .avl = (flags >> 12) & 0x01, \
+ .l = (flags >> 13) & 0x01, \
+ .d = (flags >> 14) & 0x01, \
+ .g = (flags >> 15) & 0x01, \
+ }
+
+enum {
+ GATE_INTERRUPT = 0xE,
+ GATE_TRAP = 0xF,
+ GATE_CALL = 0xC,
+ GATE_TASK = 0x5,
+};
+
+enum {
+ DESC_TSS = 0x9,
+ DESC_LDT = 0x2,
+ DESCTYPE_S = 0x10, /* !system */
+};
+
+/* LDT or TSS descriptor in the GDT. */
+struct ldttss_desc {
+ u16 limit0;
+ u16 base0;
+
+ u16 base1 : 8, type : 5, dpl : 2, p : 1;
+ u16 limit1 : 4, zero0 : 3, g : 1, base2 : 8;
+#ifdef CONFIG_X86_64
+ u32 base3;
+ u32 zero1;
+#endif
+} __attribute__((packed));
+
+typedef struct ldttss_desc ldt_desc;
+typedef struct ldttss_desc tss_desc;
+
+struct idt_bits {
+ u16 ist : 3,
+ zero : 5,
+ type : 5,
+ dpl : 2,
+ p : 1;
+} __attribute__((packed));
+
+struct idt_data {
+ unsigned int vector;
+ unsigned int segment;
+ struct idt_bits bits;
+ const void *addr;
+};
+
+struct gate_struct {
+ u16 offset_low;
+ u16 segment;
+ struct idt_bits bits;
+ u16 offset_middle;
+#ifdef CONFIG_X86_64
+ u32 offset_high;
+ u32 reserved;
+#endif
+} __attribute__((packed));
+
+typedef struct gate_struct gate_desc;
+
+static inline unsigned long gate_offset(const gate_desc *g)
+{
+#ifdef CONFIG_X86_64
+ return g->offset_low | ((unsigned long)g->offset_middle << 16) |
+ ((unsigned long) g->offset_high << 32);
+#else
+ return g->offset_low | ((unsigned long)g->offset_middle << 16);
+#endif
+}
+
+static inline unsigned long gate_segment(const gate_desc *g)
+{
+ return g->segment;
+}
+
+struct desc_ptr {
+ unsigned short size;
+ unsigned long address;
+} __attribute__((packed)) ;
+
+#endif /* !__ASSEMBLY__ */
+
+/* Boot IDT definitions */
+#define BOOT_IDT_ENTRIES 32
+
+/* Access rights as returned by LAR */
+#define AR_TYPE_RODATA (0 * (1 << 9))
+#define AR_TYPE_RWDATA (1 * (1 << 9))
+#define AR_TYPE_RODATA_EXPDOWN (2 * (1 << 9))
+#define AR_TYPE_RWDATA_EXPDOWN (3 * (1 << 9))
+#define AR_TYPE_XOCODE (4 * (1 << 9))
+#define AR_TYPE_XRCODE (5 * (1 << 9))
+#define AR_TYPE_XOCODE_CONF (6 * (1 << 9))
+#define AR_TYPE_XRCODE_CONF (7 * (1 << 9))
+#define AR_TYPE_MASK (7 * (1 << 9))
+
+#define AR_DPL0 (0 * (1 << 13))
+#define AR_DPL3 (3 * (1 << 13))
+#define AR_DPL_MASK (3 * (1 << 13))
+
+#define AR_A (1 << 8) /* "Accessed" */
+#define AR_S (1 << 12) /* If clear, "System" segment */
+#define AR_P (1 << 15) /* "Present" */
+#define AR_AVL (1 << 20) /* "AVaiLable" (no HW effect) */
+#define AR_L (1 << 21) /* "Long mode" for code segments */
+#define AR_DB (1 << 22) /* D/B, effect depends on type */
+#define AR_G (1 << 23) /* "Granularity" (limit in pages) */
+
+#endif /* _ASM_X86_DESC_DEFS_H */