This source file includes following definitions.
- xen_io_apic_read
- xen_set_apic_id
- xen_get_apic_id
- xen_apic_read
- xen_apic_write
- xen_apic_icr_read
- xen_apic_icr_write
- xen_safe_apic_wait_icr_idle
- xen_apic_probe_pv
- xen_madt_oem_check
- xen_id_always_valid
- xen_id_always_registered
- xen_phys_pkg_id
- xen_x86_32_early_logical_apicid
- xen_noop
- xen_silent_inquire
- xen_cpu_present_to_apicid
- xen_apic_check
- xen_init_apic
1
2 #include <linux/init.h>
3
4 #include <asm/x86_init.h>
5 #include <asm/apic.h>
6 #include <asm/xen/hypercall.h>
7
8 #include <xen/xen.h>
9 #include <xen/interface/physdev.h>
10 #include "xen-ops.h"
11 #include "pmu.h"
12 #include "smp.h"
13
14 static unsigned int xen_io_apic_read(unsigned apic, unsigned reg)
15 {
16 struct physdev_apic apic_op;
17 int ret;
18
19 apic_op.apic_physbase = mpc_ioapic_addr(apic);
20 apic_op.reg = reg;
21 ret = HYPERVISOR_physdev_op(PHYSDEVOP_apic_read, &apic_op);
22 if (!ret)
23 return apic_op.value;
24
25
26 if (reg == 0x1)
27 return 0x00170020;
28 else if (reg == 0x0)
29 return apic << 24;
30
31 return 0xfd;
32 }
33
34 static u32 xen_set_apic_id(unsigned int x)
35 {
36 WARN_ON(1);
37 return x;
38 }
39
40 static unsigned int xen_get_apic_id(unsigned long x)
41 {
42 return ((x)>>24) & 0xFFu;
43 }
44
45 static u32 xen_apic_read(u32 reg)
46 {
47 struct xen_platform_op op = {
48 .cmd = XENPF_get_cpuinfo,
49 .interface_version = XENPF_INTERFACE_VERSION,
50 .u.pcpu_info.xen_cpuid = 0,
51 };
52 int ret = 0;
53
54
55
56 if (!xen_initial_domain() || smp_processor_id())
57 return 0;
58
59 if (reg == APIC_LVR)
60 return 0x14;
61 #ifdef CONFIG_X86_32
62 if (reg == APIC_LDR)
63 return SET_APIC_LOGICAL_ID(1UL << smp_processor_id());
64 #endif
65 if (reg != APIC_ID)
66 return 0;
67
68 ret = HYPERVISOR_platform_op(&op);
69 if (ret)
70 op.u.pcpu_info.apic_id = BAD_APICID;
71
72 return op.u.pcpu_info.apic_id << 24;
73 }
74
75 static void xen_apic_write(u32 reg, u32 val)
76 {
77 if (reg == APIC_LVTPC) {
78 (void)pmu_apic_update(reg);
79 return;
80 }
81
82
83 WARN(1,"register: %x, value: %x\n", reg, val);
84 }
85
86 static u64 xen_apic_icr_read(void)
87 {
88 return 0;
89 }
90
91 static void xen_apic_icr_write(u32 low, u32 id)
92 {
93
94 WARN_ON(1);
95 }
96
97 static u32 xen_safe_apic_wait_icr_idle(void)
98 {
99 return 0;
100 }
101
102 static int xen_apic_probe_pv(void)
103 {
104 if (xen_pv_domain())
105 return 1;
106
107 return 0;
108 }
109
110 static int xen_madt_oem_check(char *oem_id, char *oem_table_id)
111 {
112 return xen_pv_domain();
113 }
114
115 static int xen_id_always_valid(u32 apicid)
116 {
117 return 1;
118 }
119
120 static int xen_id_always_registered(void)
121 {
122 return 1;
123 }
124
125 static int xen_phys_pkg_id(int initial_apic_id, int index_msb)
126 {
127 return initial_apic_id >> index_msb;
128 }
129
130 #ifdef CONFIG_X86_32
131 static int xen_x86_32_early_logical_apicid(int cpu)
132 {
133
134 return 1 << cpu;
135 }
136 #endif
137
138 static void xen_noop(void)
139 {
140 }
141
142 static void xen_silent_inquire(int apicid)
143 {
144 }
145
146 static int xen_cpu_present_to_apicid(int cpu)
147 {
148 if (cpu_present(cpu))
149 return cpu_data(cpu).apicid;
150 else
151 return BAD_APICID;
152 }
153
154 static struct apic xen_pv_apic = {
155 .name = "Xen PV",
156 .probe = xen_apic_probe_pv,
157 .acpi_madt_oem_check = xen_madt_oem_check,
158 .apic_id_valid = xen_id_always_valid,
159 .apic_id_registered = xen_id_always_registered,
160
161
162
163
164 .disable_esr = 0,
165
166 .check_apicid_used = default_check_apicid_used,
167
168 .init_apic_ldr = xen_noop,
169
170 .ioapic_phys_id_map = default_ioapic_phys_id_map,
171 .setup_apic_routing = NULL,
172 .cpu_present_to_apicid = xen_cpu_present_to_apicid,
173 .apicid_to_cpu_present = physid_set_mask_of_physid,
174 .check_phys_apicid_present = default_check_phys_apicid_present,
175 .phys_pkg_id = xen_phys_pkg_id,
176
177 .get_apic_id = xen_get_apic_id,
178 .set_apic_id = xen_set_apic_id,
179
180 .calc_dest_apicid = apic_flat_calc_apicid,
181
182 #ifdef CONFIG_SMP
183 .send_IPI_mask = xen_send_IPI_mask,
184 .send_IPI_mask_allbutself = xen_send_IPI_mask_allbutself,
185 .send_IPI_allbutself = xen_send_IPI_allbutself,
186 .send_IPI_all = xen_send_IPI_all,
187 .send_IPI_self = xen_send_IPI_self,
188 #endif
189
190 .inquire_remote_apic = xen_silent_inquire,
191
192 .read = xen_apic_read,
193 .write = xen_apic_write,
194 .eoi_write = xen_apic_write,
195
196 .icr_read = xen_apic_icr_read,
197 .icr_write = xen_apic_icr_write,
198 .wait_icr_idle = xen_noop,
199 .safe_wait_icr_idle = xen_safe_apic_wait_icr_idle,
200
201 #ifdef CONFIG_X86_32
202
203 .x86_32_early_logical_apicid = xen_x86_32_early_logical_apicid,
204 #endif
205 };
206
207 static void __init xen_apic_check(void)
208 {
209 if (apic == &xen_pv_apic)
210 return;
211
212 pr_info("Switched APIC routing from %s to %s.\n", apic->name,
213 xen_pv_apic.name);
214 apic = &xen_pv_apic;
215 }
216 void __init xen_init_apic(void)
217 {
218 x86_apic_ops.io_apic_read = xen_io_apic_read;
219
220
221 if (!xen_initial_domain())
222 apic = &xen_pv_apic;
223
224 x86_platform.apic_post_init = xen_apic_check;
225 }
226 apic_driver(xen_pv_apic);