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Message-Id: <1557219151-32212-2-git-send-email-kernelfans@gmail.com>
Date: Tue, 7 May 2019 16:52:30 +0800
From: Pingfan Liu <kernelfans@...il.com>
To: x86@...nel.org
Cc: Pingfan Liu <kernelfans@...il.com>,
Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
"H. Peter Anvin" <hpa@...or.com>,
"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
Cao jin <caoj.fnst@...fujitsu.com>, Wei Huang <wei@...hat.com>,
Chao Fan <fanc.fnst@...fujitsu.com>,
Nicolai Stange <nstange@...e.de>,
Dou Liyang <douly.fnst@...fujitsu.com>,
linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] x86/idt: split out idt routines
Some idt routines can be reused in early boot stage. Splitting them out.
Signed-off-by: Pingfan Liu <kernelfans@...il.com>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: Borislav Petkov <bp@...en8.de>
Cc: "H. Peter Anvin" <hpa@...or.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Cc: Cao jin <caoj.fnst@...fujitsu.com>
Cc: Wei Huang <wei@...hat.com>
Cc: Chao Fan <fanc.fnst@...fujitsu.com>
Cc: Nicolai Stange <nstange@...e.de>
Cc: Dou Liyang <douly.fnst@...fujitsu.com>
Cc: linux-kernel@...r.kernel.org
---
arch/x86/include/asm/idt.h | 64 ++++++++++++++++++++++++++++++++++++++++++++++
arch/x86/kernel/idt.c | 58 +----------------------------------------
2 files changed, 65 insertions(+), 57 deletions(-)
create mode 100644 arch/x86/include/asm/idt.h
diff --git a/arch/x86/include/asm/idt.h b/arch/x86/include/asm/idt.h
new file mode 100644
index 0000000..147f128
--- /dev/null
+++ b/arch/x86/include/asm/idt.h
@@ -0,0 +1,64 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_X86_IDT_H
+#define _ASM_X86_IDT_H
+
+#include <asm/desc_defs.h>
+
+struct idt_data {
+ unsigned int vector;
+ unsigned int segment;
+ struct idt_bits bits;
+ const void *addr;
+};
+
+#define DPL0 0x0
+#define DPL3 0x3
+
+#define DEFAULT_STACK 0
+
+#define G(_vector, _addr, _ist, _type, _dpl, _segment) \
+ { \
+ .vector = _vector, \
+ .bits.ist = _ist, \
+ .bits.type = _type, \
+ .bits.dpl = _dpl, \
+ .bits.p = 1, \
+ .addr = _addr, \
+ .segment = _segment, \
+ }
+
+/* Interrupt gate */
+#define INTG(_vector, _addr) \
+ G(_vector, _addr, DEFAULT_STACK, GATE_INTERRUPT, DPL0, __KERNEL_CS)
+
+/* System interrupt gate */
+#define SYSG(_vector, _addr) \
+ G(_vector, _addr, DEFAULT_STACK, GATE_INTERRUPT, DPL3, __KERNEL_CS)
+
+/* Interrupt gate with interrupt stack */
+#define ISTG(_vector, _addr, _ist) \
+ G(_vector, _addr, _ist, GATE_INTERRUPT, DPL0, __KERNEL_CS)
+
+/* System interrupt gate with interrupt stack */
+#define SISTG(_vector, _addr, _ist) \
+ G(_vector, _addr, _ist, GATE_INTERRUPT, DPL3, __KERNEL_CS)
+
+/* Task gate */
+#define TSKG(_vector, _gdt) \
+ G(_vector, NULL, DEFAULT_STACK, GATE_TASK, DPL0, _gdt << 3)
+
+static inline void idt_init_desc(gate_desc *gate, const struct idt_data *d)
+{
+ unsigned long addr = (unsigned long) d->addr;
+
+ gate->offset_low = (u16) addr;
+ gate->segment = (u16) d->segment;
+ gate->bits = d->bits;
+ gate->offset_middle = (u16) (addr >> 16);
+#ifdef CONFIG_X86_64
+ gate->offset_high = (u32) (addr >> 32);
+ gate->reserved = 0;
+#endif
+}
+
+#endif
diff --git a/arch/x86/kernel/idt.c b/arch/x86/kernel/idt.c
index 01adea2..80b811a 100644
--- a/arch/x86/kernel/idt.c
+++ b/arch/x86/kernel/idt.c
@@ -9,49 +9,7 @@
#include <asm/proto.h>
#include <asm/desc.h>
#include <asm/hw_irq.h>
-
-struct idt_data {
- unsigned int vector;
- unsigned int segment;
- struct idt_bits bits;
- const void *addr;
-};
-
-#define DPL0 0x0
-#define DPL3 0x3
-
-#define DEFAULT_STACK 0
-
-#define G(_vector, _addr, _ist, _type, _dpl, _segment) \
- { \
- .vector = _vector, \
- .bits.ist = _ist, \
- .bits.type = _type, \
- .bits.dpl = _dpl, \
- .bits.p = 1, \
- .addr = _addr, \
- .segment = _segment, \
- }
-
-/* Interrupt gate */
-#define INTG(_vector, _addr) \
- G(_vector, _addr, DEFAULT_STACK, GATE_INTERRUPT, DPL0, __KERNEL_CS)
-
-/* System interrupt gate */
-#define SYSG(_vector, _addr) \
- G(_vector, _addr, DEFAULT_STACK, GATE_INTERRUPT, DPL3, __KERNEL_CS)
-
-/* Interrupt gate with interrupt stack */
-#define ISTG(_vector, _addr, _ist) \
- G(_vector, _addr, _ist, GATE_INTERRUPT, DPL0, __KERNEL_CS)
-
-/* System interrupt gate with interrupt stack */
-#define SISTG(_vector, _addr, _ist) \
- G(_vector, _addr, _ist, GATE_INTERRUPT, DPL3, __KERNEL_CS)
-
-/* Task gate */
-#define TSKG(_vector, _gdt) \
- G(_vector, NULL, DEFAULT_STACK, GATE_TASK, DPL0, _gdt << 3)
+#include <asm/idt.h>
/*
* Early traps running on the DEFAULT_STACK because the other interrupt
@@ -202,20 +160,6 @@ const struct desc_ptr debug_idt_descr = {
};
#endif
-static inline void idt_init_desc(gate_desc *gate, const struct idt_data *d)
-{
- unsigned long addr = (unsigned long) d->addr;
-
- gate->offset_low = (u16) addr;
- gate->segment = (u16) d->segment;
- gate->bits = d->bits;
- gate->offset_middle = (u16) (addr >> 16);
-#ifdef CONFIG_X86_64
- gate->offset_high = (u32) (addr >> 32);
- gate->reserved = 0;
-#endif
-}
-
static void
idt_setup_from_table(gate_desc *idt, const struct idt_data *t, int size, bool sys)
{
--
2.7.4
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