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Commit | Line | Data |
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31b3c9d7 | 1 | #include <linux/init.h> |
87e4baac | 2 | |
31b3c9d7 | 3 | #include <asm/x86_init.h> |
ab6ec39a | 4 | #include <asm/apic.h> |
ab6ec39a | 5 | #include <asm/xen/hypercall.h> |
31b3c9d7 | 6 | |
87e4baac IM |
7 | #include <xen/xen.h> |
8 | #include <xen/interface/physdev.h> | |
b8b0f559 | 9 | #include "xen-ops.h" |
feb44f1f | 10 | #include "smp.h" |
87e4baac | 11 | |
b8b0f559 | 12 | static unsigned int xen_io_apic_read(unsigned apic, unsigned reg) |
31b3c9d7 | 13 | { |
ab6ec39a LM |
14 | struct physdev_apic apic_op; |
15 | int ret; | |
16 | ||
17 | apic_op.apic_physbase = mpc_ioapic_addr(apic); | |
18 | apic_op.reg = reg; | |
19 | ret = HYPERVISOR_physdev_op(PHYSDEVOP_apic_read, &apic_op); | |
20 | if (!ret) | |
21 | return apic_op.value; | |
22 | ||
23 | /* fallback to return an emulated IO_APIC values */ | |
31b3c9d7 KRW |
24 | if (reg == 0x1) |
25 | return 0x00170020; | |
26 | else if (reg == 0x0) | |
27 | return apic << 24; | |
28 | ||
29 | return 0xfd; | |
30 | } | |
31 | ||
feb44f1f KRW |
32 | static unsigned long xen_set_apic_id(unsigned int x) |
33 | { | |
34 | WARN_ON(1); | |
35 | return x; | |
36 | } | |
37 | ||
38 | static unsigned int xen_get_apic_id(unsigned long x) | |
39 | { | |
40 | return ((x)>>24) & 0xFFu; | |
41 | } | |
42 | ||
43 | static u32 xen_apic_read(u32 reg) | |
44 | { | |
45 | struct xen_platform_op op = { | |
46 | .cmd = XENPF_get_cpuinfo, | |
47 | .interface_version = XENPF_INTERFACE_VERSION, | |
48 | .u.pcpu_info.xen_cpuid = 0, | |
49 | }; | |
50 | int ret = 0; | |
51 | ||
52 | /* Shouldn't need this as APIC is turned off for PV, and we only | |
53 | * get called on the bootup processor. But just in case. */ | |
54 | if (!xen_initial_domain() || smp_processor_id()) | |
55 | return 0; | |
56 | ||
57 | if (reg == APIC_LVR) | |
58 | return 0x10; | |
59 | #ifdef CONFIG_X86_32 | |
60 | if (reg == APIC_LDR) | |
61 | return SET_APIC_LOGICAL_ID(1UL << smp_processor_id()); | |
62 | #endif | |
63 | if (reg != APIC_ID) | |
64 | return 0; | |
65 | ||
66 | ret = HYPERVISOR_dom0_op(&op); | |
67 | if (ret) | |
68 | return 0; | |
69 | ||
70 | return op.u.pcpu_info.apic_id << 24; | |
71 | } | |
72 | ||
73 | static void xen_apic_write(u32 reg, u32 val) | |
74 | { | |
75 | /* Warn to see if there's any stray references */ | |
b3b06c7e | 76 | WARN(1,"register: %x, value: %x\n", reg, val); |
feb44f1f KRW |
77 | } |
78 | ||
79 | static u64 xen_apic_icr_read(void) | |
80 | { | |
81 | return 0; | |
82 | } | |
83 | ||
84 | static void xen_apic_icr_write(u32 low, u32 id) | |
85 | { | |
86 | /* Warn to see if there's any stray references */ | |
87 | WARN_ON(1); | |
88 | } | |
89 | ||
90 | static u32 xen_safe_apic_wait_icr_idle(void) | |
91 | { | |
92 | return 0; | |
93 | } | |
94 | ||
95 | static int xen_apic_probe_pv(void) | |
96 | { | |
97 | if (xen_pv_domain()) | |
98 | return 1; | |
99 | ||
100 | return 0; | |
101 | } | |
102 | ||
103 | static int xen_madt_oem_check(char *oem_id, char *oem_table_id) | |
104 | { | |
105 | return xen_pv_domain(); | |
106 | } | |
107 | ||
108 | static int xen_id_always_valid(int apicid) | |
109 | { | |
110 | return 1; | |
111 | } | |
112 | ||
113 | static int xen_id_always_registered(void) | |
114 | { | |
115 | return 1; | |
116 | } | |
117 | ||
118 | static int xen_phys_pkg_id(int initial_apic_id, int index_msb) | |
119 | { | |
120 | return initial_apic_id >> index_msb; | |
121 | } | |
122 | ||
123 | #ifdef CONFIG_X86_32 | |
124 | static int xen_x86_32_early_logical_apicid(int cpu) | |
125 | { | |
126 | /* Match with APIC_LDR read. Otherwise setup_local_APIC complains. */ | |
127 | return 1 << cpu; | |
128 | } | |
129 | #endif | |
130 | ||
131 | static void xen_noop(void) | |
132 | { | |
133 | } | |
134 | ||
135 | static void xen_silent_inquire(int apicid) | |
136 | { | |
137 | } | |
138 | ||
139 | static struct apic xen_pv_apic = { | |
140 | .name = "Xen PV", | |
141 | .probe = xen_apic_probe_pv, | |
142 | .acpi_madt_oem_check = xen_madt_oem_check, | |
143 | .apic_id_valid = xen_id_always_valid, | |
144 | .apic_id_registered = xen_id_always_registered, | |
145 | ||
146 | /* .irq_delivery_mode - used in native_compose_msi_msg only */ | |
147 | /* .irq_dest_mode - used in native_compose_msi_msg only */ | |
148 | ||
149 | .target_cpus = default_target_cpus, | |
150 | .disable_esr = 0, | |
151 | /* .dest_logical - default_send_IPI_ use it but we use our own. */ | |
152 | .check_apicid_used = default_check_apicid_used, /* Used on 32-bit */ | |
153 | ||
154 | .vector_allocation_domain = flat_vector_allocation_domain, | |
155 | .init_apic_ldr = xen_noop, /* setup_local_APIC calls it */ | |
156 | ||
157 | .ioapic_phys_id_map = default_ioapic_phys_id_map, /* Used on 32-bit */ | |
158 | .setup_apic_routing = NULL, | |
159 | .cpu_present_to_apicid = default_cpu_present_to_apicid, | |
160 | .apicid_to_cpu_present = physid_set_mask_of_physid, /* Used on 32-bit */ | |
161 | .check_phys_apicid_present = default_check_phys_apicid_present, /* smp_sanity_check needs it */ | |
162 | .phys_pkg_id = xen_phys_pkg_id, /* detect_ht */ | |
163 | ||
164 | .get_apic_id = xen_get_apic_id, | |
165 | .set_apic_id = xen_set_apic_id, /* Can be NULL on 32-bit. */ | |
166 | .apic_id_mask = 0xFF << 24, /* Used by verify_local_APIC. Match with what xen_get_apic_id does. */ | |
167 | ||
168 | .cpu_mask_to_apicid_and = flat_cpu_mask_to_apicid_and, | |
169 | ||
170 | #ifdef CONFIG_SMP | |
171 | .send_IPI_mask = xen_send_IPI_mask, | |
172 | .send_IPI_mask_allbutself = xen_send_IPI_mask_allbutself, | |
173 | .send_IPI_allbutself = xen_send_IPI_allbutself, | |
174 | .send_IPI_all = xen_send_IPI_all, | |
175 | .send_IPI_self = xen_send_IPI_self, | |
176 | #endif | |
177 | /* .wait_for_init_deassert- used by AP bootup - smp_callin which we don't use */ | |
178 | .inquire_remote_apic = xen_silent_inquire, | |
179 | ||
180 | .read = xen_apic_read, | |
181 | .write = xen_apic_write, | |
182 | .eoi_write = xen_apic_write, | |
183 | ||
184 | .icr_read = xen_apic_icr_read, | |
185 | .icr_write = xen_apic_icr_write, | |
186 | .wait_icr_idle = xen_noop, | |
187 | .safe_wait_icr_idle = xen_safe_apic_wait_icr_idle, | |
188 | ||
189 | #ifdef CONFIG_X86_32 | |
190 | /* generic_processor_info and setup_local_APIC. */ | |
191 | .x86_32_early_logical_apicid = xen_x86_32_early_logical_apicid, | |
192 | #endif | |
193 | }; | |
194 | ||
195 | static void __init xen_apic_check(void) | |
196 | { | |
197 | if (apic == &xen_pv_apic) | |
198 | return; | |
199 | ||
200 | pr_info("Switched APIC routing from %s to %s.\n", apic->name, | |
201 | xen_pv_apic.name); | |
202 | apic = &xen_pv_apic; | |
203 | } | |
31b3c9d7 KRW |
204 | void __init xen_init_apic(void) |
205 | { | |
206 | x86_io_apic_ops.read = xen_io_apic_read; | |
feb44f1f KRW |
207 | /* On PV guests the APIC CPUID bit is disabled so none of the |
208 | * routines end up executing. */ | |
209 | if (!xen_initial_domain()) | |
210 | apic = &xen_pv_apic; | |
211 | ||
212 | x86_platform.apic_post_init = xen_apic_check; | |
31b3c9d7 | 213 | } |
feb44f1f | 214 | apic_driver(xen_pv_apic); |