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 #include "ucall_common.h" 15 16 #define APIC_DEFAULT_GPA 0xfee00000ULL 17 18 /* APIC base address MSR and fields */ 19 #define MSR_IA32_APICBASE 0x0000001b 20 #define MSR_IA32_APICBASE_BSP (1<<8) 21 #define MSR_IA32_APICBASE_EXTD (1<<10) 22 #define MSR_IA32_APICBASE_ENABLE (1<<11) 23 #define MSR_IA32_APICBASE_BASE (0xfffff<<12) 24 #define GET_APIC_BASE(x) (((x) >> 12) << 12) 25 26 #define APIC_BASE_MSR 0x800 27 #define X2APIC_ENABLE (1UL << 10) 28 #define APIC_ID 0x20 29 #define APIC_LVR 0x30 30 #define GET_APIC_ID_FIELD(x) (((x) >> 24) & 0xFF) 31 #define APIC_TASKPRI 0x80 32 #define APIC_PROCPRI 0xA0 33 #define APIC_EOI 0xB0 34 #define APIC_SPIV 0xF0 35 #define APIC_SPIV_FOCUS_DISABLED (1 << 9) 36 #define APIC_SPIV_APIC_ENABLED (1 << 8) 37 #define APIC_IRR 0x200 38 #define APIC_ICR 0x300 39 #define APIC_LVTCMCI 0x2f0 40 #define APIC_DEST_SELF 0x40000 41 #define APIC_DEST_ALLINC 0x80000 42 #define APIC_DEST_ALLBUT 0xC0000 43 #define APIC_ICR_RR_MASK 0x30000 44 #define APIC_ICR_RR_INVALID 0x00000 45 #define APIC_ICR_RR_INPROG 0x10000 46 #define APIC_ICR_RR_VALID 0x20000 47 #define APIC_INT_LEVELTRIG 0x08000 48 #define APIC_INT_ASSERT 0x04000 49 #define APIC_ICR_BUSY 0x01000 50 #define APIC_DEST_LOGICAL 0x00800 51 #define APIC_DEST_PHYSICAL 0x00000 52 #define APIC_DM_FIXED 0x00000 53 #define APIC_DM_FIXED_MASK 0x00700 54 #define APIC_DM_LOWEST 0x00100 55 #define APIC_DM_SMI 0x00200 56 #define APIC_DM_REMRD 0x00300 57 #define APIC_DM_NMI 0x00400 58 #define APIC_DM_INIT 0x00500 59 #define APIC_DM_STARTUP 0x00600 60 #define APIC_DM_EXTINT 0x00700 61 #define APIC_VECTOR_MASK 0x000FF 62 #define APIC_ICR2 0x310 63 #define SET_APIC_DEST_FIELD(x) ((x) << 24) 64 #define APIC_LVTT 0x320 65 #define APIC_LVT_TIMER_ONESHOT (0 << 17) 66 #define APIC_LVT_TIMER_PERIODIC (1 << 17) 67 #define APIC_LVT_TIMER_TSCDEADLINE (2 << 17) 68 #define APIC_LVT_MASKED (1 << 16) 69 #define APIC_TMICT 0x380 70 #define APIC_TMCCT 0x390 71 #define APIC_TDCR 0x3E0 72 73 void apic_disable(void); 74 void xapic_enable(void); 75 void x2apic_enable(void); 76 77 static inline uint32_t get_bsp_flag(void) 78 { 79 return rdmsr(MSR_IA32_APICBASE) & MSR_IA32_APICBASE_BSP; 80 } 81 82 static inline uint32_t xapic_read_reg(unsigned int reg) 83 { 84 return ((volatile uint32_t *)APIC_DEFAULT_GPA)[reg >> 2]; 85 } 86 87 static inline void xapic_write_reg(unsigned int reg, uint32_t val) 88 { 89 ((volatile uint32_t *)APIC_DEFAULT_GPA)[reg >> 2] = val; 90 } 91 92 static inline uint64_t x2apic_read_reg(unsigned int reg) 93 { 94 return rdmsr(APIC_BASE_MSR + (reg >> 4)); 95 } 96 97 static inline uint8_t x2apic_write_reg_safe(unsigned int reg, uint64_t value) 98 { 99 return wrmsr_safe(APIC_BASE_MSR + (reg >> 4), value); 100 } 101 102 static inline void x2apic_write_reg(unsigned int reg, uint64_t value) 103 { 104 uint8_t fault = x2apic_write_reg_safe(reg, value); 105 106 __GUEST_ASSERT(!fault, "Unexpected fault 0x%x on WRMSR(%x) = %lx\n", 107 fault, APIC_BASE_MSR + (reg >> 4), value); 108 } 109 110 static inline void x2apic_write_reg_fault(unsigned int reg, uint64_t value) 111 { 112 uint8_t fault = x2apic_write_reg_safe(reg, value); 113 114 __GUEST_ASSERT(fault == GP_VECTOR, 115 "Wanted #GP on WRMSR(%x) = %lx, got 0x%x\n", 116 APIC_BASE_MSR + (reg >> 4), value, fault); 117 } 118 119 120 #endif /* SELFTEST_KVM_APIC_H */ 121