1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * tools/testing/selftests/kvm/include/x86_64/apic.h
4  *
5  * Copyright (C) 2021, Google LLC.
6  */
7 
8 #ifndef SELFTEST_KVM_APIC_H
9 #define SELFTEST_KVM_APIC_H
10 
11 #include <stdint.h>
12 
13 #include "processor.h"
14 
15 #define APIC_DEFAULT_GPA		0xfee00000ULL
16 
17 /* APIC base address MSR and fields */
18 #define MSR_IA32_APICBASE		0x0000001b
19 #define MSR_IA32_APICBASE_BSP		(1<<8)
20 #define MSR_IA32_APICBASE_EXTD		(1<<10)
21 #define MSR_IA32_APICBASE_ENABLE	(1<<11)
22 #define MSR_IA32_APICBASE_BASE		(0xfffff<<12)
23 #define		GET_APIC_BASE(x)	(((x) >> 12) << 12)
24 
25 #define APIC_BASE_MSR	0x800
26 #define X2APIC_ENABLE	(1UL << 10)
27 #define	APIC_ID		0x20
28 #define	APIC_LVR	0x30
29 #define		GET_APIC_ID_FIELD(x)	(((x) >> 24) & 0xFF)
30 #define	APIC_TASKPRI	0x80
31 #define	APIC_PROCPRI	0xA0
32 #define	APIC_EOI	0xB0
33 #define	APIC_SPIV	0xF0
34 #define		APIC_SPIV_FOCUS_DISABLED	(1 << 9)
35 #define		APIC_SPIV_APIC_ENABLED		(1 << 8)
36 #define APIC_IRR	0x200
37 #define	APIC_ICR	0x300
38 #define	APIC_LVTCMCI	0x2f0
39 #define		APIC_DEST_SELF		0x40000
40 #define		APIC_DEST_ALLINC	0x80000
41 #define		APIC_DEST_ALLBUT	0xC0000
42 #define		APIC_ICR_RR_MASK	0x30000
43 #define		APIC_ICR_RR_INVALID	0x00000
44 #define		APIC_ICR_RR_INPROG	0x10000
45 #define		APIC_ICR_RR_VALID	0x20000
46 #define		APIC_INT_LEVELTRIG	0x08000
47 #define		APIC_INT_ASSERT		0x04000
48 #define		APIC_ICR_BUSY		0x01000
49 #define		APIC_DEST_LOGICAL	0x00800
50 #define		APIC_DEST_PHYSICAL	0x00000
51 #define		APIC_DM_FIXED		0x00000
52 #define		APIC_DM_FIXED_MASK	0x00700
53 #define		APIC_DM_LOWEST		0x00100
54 #define		APIC_DM_SMI		0x00200
55 #define		APIC_DM_REMRD		0x00300
56 #define		APIC_DM_NMI		0x00400
57 #define		APIC_DM_INIT		0x00500
58 #define		APIC_DM_STARTUP		0x00600
59 #define		APIC_DM_EXTINT		0x00700
60 #define		APIC_VECTOR_MASK	0x000FF
61 #define	APIC_ICR2	0x310
62 #define		SET_APIC_DEST_FIELD(x)	((x) << 24)
63 
64 void apic_disable(void);
65 void xapic_enable(void);
66 void x2apic_enable(void);
67 
68 static inline uint32_t get_bsp_flag(void)
69 {
70 	return rdmsr(MSR_IA32_APICBASE) & MSR_IA32_APICBASE_BSP;
71 }
72 
73 static inline uint32_t xapic_read_reg(unsigned int reg)
74 {
75 	return ((volatile uint32_t *)APIC_DEFAULT_GPA)[reg >> 2];
76 }
77 
78 static inline void xapic_write_reg(unsigned int reg, uint32_t val)
79 {
80 	((volatile uint32_t *)APIC_DEFAULT_GPA)[reg >> 2] = val;
81 }
82 
83 static inline uint64_t x2apic_read_reg(unsigned int reg)
84 {
85 	return rdmsr(APIC_BASE_MSR + (reg >> 4));
86 }
87 
88 static inline void x2apic_write_reg(unsigned int reg, uint64_t value)
89 {
90 	wrmsr(APIC_BASE_MSR + (reg >> 4), value);
91 }
92 
93 #endif /* SELFTEST_KVM_APIC_H */
94