diff options
Diffstat (limited to 'arch/x86')
-rw-r--r-- | arch/x86/Kconfig | 4 | ||||
-rw-r--r-- | arch/x86/include/asm/bootparam.h | 3 | ||||
-rw-r--r-- | arch/x86/include/asm/fixmap.h | 3 | ||||
-rw-r--r-- | arch/x86/kernel/Makefile | 1 | ||||
-rw-r--r-- | arch/x86/kernel/reboot.c | 7 | ||||
-rw-r--r-- | arch/x86/kernel/setup.c | 3 | ||||
-rw-r--r-- | arch/x86/kernel/smpboot.c | 2 | ||||
-rw-r--r-- | arch/x86/kernel/tboot.c | 447 |
8 files changed, 469 insertions, 1 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index fc20fdc0f7f2..74bf3e30ce75 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig | |||
@@ -179,6 +179,10 @@ config ARCH_SUPPORTS_OPTIMIZED_INLINING | |||
179 | config ARCH_SUPPORTS_DEBUG_PAGEALLOC | 179 | config ARCH_SUPPORTS_DEBUG_PAGEALLOC |
180 | def_bool y | 180 | def_bool y |
181 | 181 | ||
182 | config HAVE_INTEL_TXT | ||
183 | def_bool y | ||
184 | depends on EXPERIMENTAL && DMAR && ACPI | ||
185 | |||
182 | # Use the generic interrupt handling code in kernel/irq/: | 186 | # Use the generic interrupt handling code in kernel/irq/: |
183 | config GENERIC_HARDIRQS | 187 | config GENERIC_HARDIRQS |
184 | bool | 188 | bool |
diff --git a/arch/x86/include/asm/bootparam.h b/arch/x86/include/asm/bootparam.h index 1724e8de317c..6ca20218dd72 100644 --- a/arch/x86/include/asm/bootparam.h +++ b/arch/x86/include/asm/bootparam.h | |||
@@ -85,7 +85,8 @@ struct efi_info { | |||
85 | struct boot_params { | 85 | struct boot_params { |
86 | struct screen_info screen_info; /* 0x000 */ | 86 | struct screen_info screen_info; /* 0x000 */ |
87 | struct apm_bios_info apm_bios_info; /* 0x040 */ | 87 | struct apm_bios_info apm_bios_info; /* 0x040 */ |
88 | __u8 _pad2[12]; /* 0x054 */ | 88 | __u8 _pad2[4]; /* 0x054 */ |
89 | __u64 tboot_addr; /* 0x058 */ | ||
89 | struct ist_info ist_info; /* 0x060 */ | 90 | struct ist_info ist_info; /* 0x060 */ |
90 | __u8 _pad3[16]; /* 0x070 */ | 91 | __u8 _pad3[16]; /* 0x070 */ |
91 | __u8 hd0_info[16]; /* obsolete! */ /* 0x080 */ | 92 | __u8 hd0_info[16]; /* obsolete! */ /* 0x080 */ |
diff --git a/arch/x86/include/asm/fixmap.h b/arch/x86/include/asm/fixmap.h index 7b2d71df39a6..14f9890eb495 100644 --- a/arch/x86/include/asm/fixmap.h +++ b/arch/x86/include/asm/fixmap.h | |||
@@ -132,6 +132,9 @@ enum fixed_addresses { | |||
132 | #ifdef CONFIG_X86_32 | 132 | #ifdef CONFIG_X86_32 |
133 | FIX_WP_TEST, | 133 | FIX_WP_TEST, |
134 | #endif | 134 | #endif |
135 | #ifdef CONFIG_INTEL_TXT | ||
136 | FIX_TBOOT_BASE, | ||
137 | #endif | ||
135 | __end_of_fixed_addresses | 138 | __end_of_fixed_addresses |
136 | }; | 139 | }; |
137 | 140 | ||
diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile index 430d5b24af7b..832cb838cb48 100644 --- a/arch/x86/kernel/Makefile +++ b/arch/x86/kernel/Makefile | |||
@@ -52,6 +52,7 @@ obj-$(CONFIG_X86_DS_SELFTEST) += ds_selftest.o | |||
52 | obj-$(CONFIG_X86_32) += tls.o | 52 | obj-$(CONFIG_X86_32) += tls.o |
53 | obj-$(CONFIG_IA32_EMULATION) += tls.o | 53 | obj-$(CONFIG_IA32_EMULATION) += tls.o |
54 | obj-y += step.o | 54 | obj-y += step.o |
55 | obj-$(CONFIG_INTEL_TXT) += tboot.o | ||
55 | obj-$(CONFIG_STACKTRACE) += stacktrace.o | 56 | obj-$(CONFIG_STACKTRACE) += stacktrace.o |
56 | obj-y += cpu/ | 57 | obj-y += cpu/ |
57 | obj-y += acpi/ | 58 | obj-y += acpi/ |
diff --git a/arch/x86/kernel/reboot.c b/arch/x86/kernel/reboot.c index a06e8d101844..27349f92a6d7 100644 --- a/arch/x86/kernel/reboot.c +++ b/arch/x86/kernel/reboot.c | |||
@@ -4,6 +4,7 @@ | |||
4 | #include <linux/pm.h> | 4 | #include <linux/pm.h> |
5 | #include <linux/efi.h> | 5 | #include <linux/efi.h> |
6 | #include <linux/dmi.h> | 6 | #include <linux/dmi.h> |
7 | #include <linux/tboot.h> | ||
7 | #include <acpi/reboot.h> | 8 | #include <acpi/reboot.h> |
8 | #include <asm/io.h> | 9 | #include <asm/io.h> |
9 | #include <asm/apic.h> | 10 | #include <asm/apic.h> |
@@ -508,6 +509,8 @@ static void native_machine_emergency_restart(void) | |||
508 | if (reboot_emergency) | 509 | if (reboot_emergency) |
509 | emergency_vmx_disable_all(); | 510 | emergency_vmx_disable_all(); |
510 | 511 | ||
512 | tboot_shutdown(TB_SHUTDOWN_REBOOT); | ||
513 | |||
511 | /* Tell the BIOS if we want cold or warm reboot */ | 514 | /* Tell the BIOS if we want cold or warm reboot */ |
512 | *((unsigned short *)__va(0x472)) = reboot_mode; | 515 | *((unsigned short *)__va(0x472)) = reboot_mode; |
513 | 516 | ||
@@ -634,6 +637,8 @@ static void native_machine_halt(void) | |||
634 | /* stop other cpus and apics */ | 637 | /* stop other cpus and apics */ |
635 | machine_shutdown(); | 638 | machine_shutdown(); |
636 | 639 | ||
640 | tboot_shutdown(TB_SHUTDOWN_HALT); | ||
641 | |||
637 | /* stop this cpu */ | 642 | /* stop this cpu */ |
638 | stop_this_cpu(NULL); | 643 | stop_this_cpu(NULL); |
639 | } | 644 | } |
@@ -645,6 +650,8 @@ static void native_machine_power_off(void) | |||
645 | machine_shutdown(); | 650 | machine_shutdown(); |
646 | pm_power_off(); | 651 | pm_power_off(); |
647 | } | 652 | } |
653 | /* a fallback in case there is no PM info available */ | ||
654 | tboot_shutdown(TB_SHUTDOWN_HALT); | ||
648 | } | 655 | } |
649 | 656 | ||
650 | struct machine_ops machine_ops = { | 657 | struct machine_ops machine_ops = { |
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c index 63f32d220ef2..61f86f241420 100644 --- a/arch/x86/kernel/setup.c +++ b/arch/x86/kernel/setup.c | |||
@@ -66,6 +66,7 @@ | |||
66 | 66 | ||
67 | #include <linux/percpu.h> | 67 | #include <linux/percpu.h> |
68 | #include <linux/crash_dump.h> | 68 | #include <linux/crash_dump.h> |
69 | #include <linux/tboot.h> | ||
69 | 70 | ||
70 | #include <video/edid.h> | 71 | #include <video/edid.h> |
71 | 72 | ||
@@ -977,6 +978,8 @@ void __init setup_arch(char **cmdline_p) | |||
977 | paravirt_pagetable_setup_done(swapper_pg_dir); | 978 | paravirt_pagetable_setup_done(swapper_pg_dir); |
978 | paravirt_post_allocator_init(); | 979 | paravirt_post_allocator_init(); |
979 | 980 | ||
981 | tboot_probe(); | ||
982 | |||
980 | #ifdef CONFIG_X86_64 | 983 | #ifdef CONFIG_X86_64 |
981 | map_vsyscall(); | 984 | map_vsyscall(); |
982 | #endif | 985 | #endif |
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c index c36cc1452cdc..9d8319183aae 100644 --- a/arch/x86/kernel/smpboot.c +++ b/arch/x86/kernel/smpboot.c | |||
@@ -47,6 +47,7 @@ | |||
47 | #include <linux/bootmem.h> | 47 | #include <linux/bootmem.h> |
48 | #include <linux/err.h> | 48 | #include <linux/err.h> |
49 | #include <linux/nmi.h> | 49 | #include <linux/nmi.h> |
50 | #include <linux/tboot.h> | ||
50 | 51 | ||
51 | #include <asm/acpi.h> | 52 | #include <asm/acpi.h> |
52 | #include <asm/desc.h> | 53 | #include <asm/desc.h> |
@@ -1318,6 +1319,7 @@ void play_dead_common(void) | |||
1318 | void native_play_dead(void) | 1319 | void native_play_dead(void) |
1319 | { | 1320 | { |
1320 | play_dead_common(); | 1321 | play_dead_common(); |
1322 | tboot_shutdown(TB_SHUTDOWN_WFS); | ||
1321 | wbinvd_halt(); | 1323 | wbinvd_halt(); |
1322 | } | 1324 | } |
1323 | 1325 | ||
diff --git a/arch/x86/kernel/tboot.c b/arch/x86/kernel/tboot.c new file mode 100644 index 000000000000..86c9f91b48ae --- /dev/null +++ b/arch/x86/kernel/tboot.c | |||
@@ -0,0 +1,447 @@ | |||
1 | /* | ||
2 | * tboot.c: main implementation of helper functions used by kernel for | ||
3 | * runtime support of Intel(R) Trusted Execution Technology | ||
4 | * | ||
5 | * Copyright (c) 2006-2009, Intel Corporation | ||
6 | * | ||
7 | * This program is free software; you can redistribute it and/or modify it | ||
8 | * under the terms and conditions of the GNU General Public License, | ||
9 | * version 2, as published by the Free Software Foundation. | ||
10 | * | ||
11 | * This program is distributed in the hope it will be useful, but WITHOUT | ||
12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | ||
14 | * more details. | ||
15 | * | ||
16 | * You should have received a copy of the GNU General Public License along with | ||
17 | * this program; if not, write to the Free Software Foundation, Inc., | ||
18 | * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. | ||
19 | * | ||
20 | */ | ||
21 | |||
22 | #include <linux/dma_remapping.h> | ||
23 | #include <linux/init_task.h> | ||
24 | #include <linux/spinlock.h> | ||
25 | #include <linux/delay.h> | ||
26 | #include <linux/sched.h> | ||
27 | #include <linux/init.h> | ||
28 | #include <linux/dmar.h> | ||
29 | #include <linux/cpu.h> | ||
30 | #include <linux/pfn.h> | ||
31 | #include <linux/mm.h> | ||
32 | #include <linux/tboot.h> | ||
33 | |||
34 | #include <asm/trampoline.h> | ||
35 | #include <asm/processor.h> | ||
36 | #include <asm/bootparam.h> | ||
37 | #include <asm/pgtable.h> | ||
38 | #include <asm/pgalloc.h> | ||
39 | #include <asm/fixmap.h> | ||
40 | #include <asm/proto.h> | ||
41 | #include <asm/setup.h> | ||
42 | #include <asm/e820.h> | ||
43 | #include <asm/io.h> | ||
44 | |||
45 | #include "acpi/realmode/wakeup.h" | ||
46 | |||
47 | /* Global pointer to shared data; NULL means no measured launch. */ | ||
48 | struct tboot *tboot __read_mostly; | ||
49 | |||
50 | /* timeout for APs (in secs) to enter wait-for-SIPI state during shutdown */ | ||
51 | #define AP_WAIT_TIMEOUT 1 | ||
52 | |||
53 | #undef pr_fmt | ||
54 | #define pr_fmt(fmt) "tboot: " fmt | ||
55 | |||
56 | static u8 tboot_uuid[16] __initdata = TBOOT_UUID; | ||
57 | |||
58 | void __init tboot_probe(void) | ||
59 | { | ||
60 | /* Look for valid page-aligned address for shared page. */ | ||
61 | if (!boot_params.tboot_addr) | ||
62 | return; | ||
63 | /* | ||
64 | * also verify that it is mapped as we expect it before calling | ||
65 | * set_fixmap(), to reduce chance of garbage value causing crash | ||
66 | */ | ||
67 | if (!e820_any_mapped(boot_params.tboot_addr, | ||
68 | boot_params.tboot_addr, E820_RESERVED)) { | ||
69 | pr_warning("non-0 tboot_addr but it is not of type E820_RESERVED\n"); | ||
70 | return; | ||
71 | } | ||
72 | |||
73 | /* only a natively booted kernel should be using TXT */ | ||
74 | if (paravirt_enabled()) { | ||
75 | pr_warning("non-0 tboot_addr but pv_ops is enabled\n"); | ||
76 | return; | ||
77 | } | ||
78 | |||
79 | /* Map and check for tboot UUID. */ | ||
80 | set_fixmap(FIX_TBOOT_BASE, boot_params.tboot_addr); | ||
81 | tboot = (struct tboot *)fix_to_virt(FIX_TBOOT_BASE); | ||
82 | if (memcmp(&tboot_uuid, &tboot->uuid, sizeof(tboot->uuid))) { | ||
83 | pr_warning("tboot at 0x%llx is invalid\n", | ||
84 | boot_params.tboot_addr); | ||
85 | tboot = NULL; | ||
86 | return; | ||
87 | } | ||
88 | if (tboot->version < 5) { | ||
89 | pr_warning("tboot version is invalid: %u\n", tboot->version); | ||
90 | tboot = NULL; | ||
91 | return; | ||
92 | } | ||
93 | |||
94 | pr_info("found shared page at phys addr 0x%llx:\n", | ||
95 | boot_params.tboot_addr); | ||
96 | pr_debug("version: %d\n", tboot->version); | ||
97 | pr_debug("log_addr: 0x%08x\n", tboot->log_addr); | ||
98 | pr_debug("shutdown_entry: 0x%x\n", tboot->shutdown_entry); | ||
99 | pr_debug("tboot_base: 0x%08x\n", tboot->tboot_base); | ||
100 | pr_debug("tboot_size: 0x%x\n", tboot->tboot_size); | ||
101 | } | ||
102 | |||
103 | static pgd_t *tboot_pg_dir; | ||
104 | static struct mm_struct tboot_mm = { | ||
105 | .mm_rb = RB_ROOT, | ||
106 | .pgd = swapper_pg_dir, | ||
107 | .mm_users = ATOMIC_INIT(2), | ||
108 | .mm_count = ATOMIC_INIT(1), | ||
109 | .mmap_sem = __RWSEM_INITIALIZER(init_mm.mmap_sem), | ||
110 | .page_table_lock = __SPIN_LOCK_UNLOCKED(init_mm.page_table_lock), | ||
111 | .mmlist = LIST_HEAD_INIT(init_mm.mmlist), | ||
112 | .cpu_vm_mask = CPU_MASK_ALL, | ||
113 | }; | ||
114 | |||
115 | static inline void switch_to_tboot_pt(void) | ||
116 | { | ||
117 | write_cr3(virt_to_phys(tboot_pg_dir)); | ||
118 | } | ||
119 | |||
120 | static int map_tboot_page(unsigned long vaddr, unsigned long pfn, | ||
121 | pgprot_t prot) | ||
122 | { | ||
123 | pgd_t *pgd; | ||
124 | pud_t *pud; | ||
125 | pmd_t *pmd; | ||
126 | pte_t *pte; | ||
127 | |||
128 | pgd = pgd_offset(&tboot_mm, vaddr); | ||
129 | pud = pud_alloc(&tboot_mm, pgd, vaddr); | ||
130 | if (!pud) | ||
131 | return -1; | ||
132 | pmd = pmd_alloc(&tboot_mm, pud, vaddr); | ||
133 | if (!pmd) | ||
134 | return -1; | ||
135 | pte = pte_alloc_map(&tboot_mm, pmd, vaddr); | ||
136 | if (!pte) | ||
137 | return -1; | ||
138 | set_pte_at(&tboot_mm, vaddr, pte, pfn_pte(pfn, prot)); | ||
139 | pte_unmap(pte); | ||
140 | return 0; | ||
141 | } | ||
142 | |||
143 | static int map_tboot_pages(unsigned long vaddr, unsigned long start_pfn, | ||
144 | unsigned long nr) | ||
145 | { | ||
146 | /* Reuse the original kernel mapping */ | ||
147 | tboot_pg_dir = pgd_alloc(&tboot_mm); | ||
148 | if (!tboot_pg_dir) | ||
149 | return -1; | ||
150 | |||
151 | for (; nr > 0; nr--, vaddr += PAGE_SIZE, start_pfn++) { | ||
152 | if (map_tboot_page(vaddr, start_pfn, PAGE_KERNEL_EXEC)) | ||
153 | return -1; | ||
154 | } | ||
155 | |||
156 | return 0; | ||
157 | } | ||
158 | |||
159 | static void tboot_create_trampoline(void) | ||
160 | { | ||
161 | u32 map_base, map_size; | ||
162 | |||
163 | /* Create identity map for tboot shutdown code. */ | ||
164 | map_base = PFN_DOWN(tboot->tboot_base); | ||
165 | map_size = PFN_UP(tboot->tboot_size); | ||
166 | if (map_tboot_pages(map_base << PAGE_SHIFT, map_base, map_size)) | ||
167 | panic("tboot: Error mapping tboot pages (mfns) @ 0x%x, 0x%x\n", | ||
168 | map_base, map_size); | ||
169 | } | ||
170 | |||
171 | #ifdef CONFIG_ACPI_SLEEP | ||
172 | |||
173 | static void add_mac_region(phys_addr_t start, unsigned long size) | ||
174 | { | ||
175 | struct tboot_mac_region *mr; | ||
176 | phys_addr_t end = start + size; | ||
177 | |||
178 | if (start && size) { | ||
179 | mr = &tboot->mac_regions[tboot->num_mac_regions++]; | ||
180 | mr->start = round_down(start, PAGE_SIZE); | ||
181 | mr->size = round_up(end, PAGE_SIZE) - mr->start; | ||
182 | } | ||
183 | } | ||
184 | |||
185 | static int tboot_setup_sleep(void) | ||
186 | { | ||
187 | tboot->num_mac_regions = 0; | ||
188 | |||
189 | /* S3 resume code */ | ||
190 | add_mac_region(acpi_wakeup_address, WAKEUP_SIZE); | ||
191 | |||
192 | #ifdef CONFIG_X86_TRAMPOLINE | ||
193 | /* AP trampoline code */ | ||
194 | add_mac_region(virt_to_phys(trampoline_base), TRAMPOLINE_SIZE); | ||
195 | #endif | ||
196 | |||
197 | /* kernel code + data + bss */ | ||
198 | add_mac_region(virt_to_phys(_text), _end - _text); | ||
199 | |||
200 | tboot->acpi_sinfo.kernel_s3_resume_vector = acpi_wakeup_address; | ||
201 | |||
202 | return 0; | ||
203 | } | ||
204 | |||
205 | #else /* no CONFIG_ACPI_SLEEP */ | ||
206 | |||
207 | static int tboot_setup_sleep(void) | ||
208 | { | ||
209 | /* S3 shutdown requested, but S3 not supported by the kernel... */ | ||
210 | BUG(); | ||
211 | return -1; | ||
212 | } | ||
213 | |||
214 | #endif | ||
215 | |||
216 | void tboot_shutdown(u32 shutdown_type) | ||
217 | { | ||
218 | void (*shutdown)(void); | ||
219 | |||
220 | if (!tboot_enabled()) | ||
221 | return; | ||
222 | |||
223 | /* | ||
224 | * if we're being called before the 1:1 mapping is set up then just | ||
225 | * return and let the normal shutdown happen; this should only be | ||
226 | * due to very early panic() | ||
227 | */ | ||
228 | if (!tboot_pg_dir) | ||
229 | return; | ||
230 | |||
231 | /* if this is S3 then set regions to MAC */ | ||
232 | if (shutdown_type == TB_SHUTDOWN_S3) | ||
233 | if (tboot_setup_sleep()) | ||
234 | return; | ||
235 | |||
236 | tboot->shutdown_type = shutdown_type; | ||
237 | |||
238 | switch_to_tboot_pt(); | ||
239 | |||
240 | shutdown = (void(*)(void))(unsigned long)tboot->shutdown_entry; | ||
241 | shutdown(); | ||
242 | |||
243 | /* should not reach here */ | ||
244 | while (1) | ||
245 | halt(); | ||
246 | } | ||
247 | |||
248 | static void tboot_copy_fadt(const struct acpi_table_fadt *fadt) | ||
249 | { | ||
250 | #define TB_COPY_GAS(tbg, g) \ | ||
251 | tbg.space_id = g.space_id; \ | ||
252 | tbg.bit_width = g.bit_width; \ | ||
253 | tbg.bit_offset = g.bit_offset; \ | ||
254 | tbg.access_width = g.access_width; \ | ||
255 | tbg.address = g.address; | ||
256 | |||
257 | TB_COPY_GAS(tboot->acpi_sinfo.pm1a_cnt_blk, fadt->xpm1a_control_block); | ||
258 | TB_COPY_GAS(tboot->acpi_sinfo.pm1b_cnt_blk, fadt->xpm1b_control_block); | ||
259 | TB_COPY_GAS(tboot->acpi_sinfo.pm1a_evt_blk, fadt->xpm1a_event_block); | ||
260 | TB_COPY_GAS(tboot->acpi_sinfo.pm1b_evt_blk, fadt->xpm1b_event_block); | ||
261 | |||
262 | /* | ||
263 | * We need phys addr of waking vector, but can't use virt_to_phys() on | ||
264 | * &acpi_gbl_FACS because it is ioremap'ed, so calc from FACS phys | ||
265 | * addr. | ||
266 | */ | ||
267 | tboot->acpi_sinfo.wakeup_vector = fadt->facs + | ||
268 | offsetof(struct acpi_table_facs, firmware_waking_vector); | ||
269 | } | ||
270 | |||
271 | void tboot_sleep(u8 sleep_state, u32 pm1a_control, u32 pm1b_control) | ||
272 | { | ||
273 | static u32 acpi_shutdown_map[ACPI_S_STATE_COUNT] = { | ||
274 | /* S0,1,2: */ -1, -1, -1, | ||
275 | /* S3: */ TB_SHUTDOWN_S3, | ||
276 | /* S4: */ TB_SHUTDOWN_S4, | ||
277 | /* S5: */ TB_SHUTDOWN_S5 }; | ||
278 | |||
279 | if (!tboot_enabled()) | ||
280 | return; | ||
281 | |||
282 | tboot_copy_fadt(&acpi_gbl_FADT); | ||
283 | tboot->acpi_sinfo.pm1a_cnt_val = pm1a_control; | ||
284 | tboot->acpi_sinfo.pm1b_cnt_val = pm1b_control; | ||
285 | /* we always use the 32b wakeup vector */ | ||
286 | tboot->acpi_sinfo.vector_width = 32; | ||
287 | |||
288 | if (sleep_state >= ACPI_S_STATE_COUNT || | ||
289 | acpi_shutdown_map[sleep_state] == -1) { | ||
290 | pr_warning("unsupported sleep state 0x%x\n", sleep_state); | ||
291 | return; | ||
292 | } | ||
293 | |||
294 | tboot_shutdown(acpi_shutdown_map[sleep_state]); | ||
295 | } | ||
296 | |||
297 | static atomic_t ap_wfs_count; | ||
298 | |||
299 | static int tboot_wait_for_aps(int num_aps) | ||
300 | { | ||
301 | unsigned long timeout; | ||
302 | |||
303 | timeout = AP_WAIT_TIMEOUT*HZ; | ||
304 | while (atomic_read((atomic_t *)&tboot->num_in_wfs) != num_aps && | ||
305 | timeout) { | ||
306 | mdelay(1); | ||
307 | timeout--; | ||
308 | } | ||
309 | |||
310 | if (timeout) | ||
311 | pr_warning("tboot wait for APs timeout\n"); | ||
312 | |||
313 | return !(atomic_read((atomic_t *)&tboot->num_in_wfs) == num_aps); | ||
314 | } | ||
315 | |||
316 | static int __cpuinit tboot_cpu_callback(struct notifier_block *nfb, | ||
317 | unsigned long action, void *hcpu) | ||
318 | { | ||
319 | switch (action) { | ||
320 | case CPU_DYING: | ||
321 | atomic_inc(&ap_wfs_count); | ||
322 | if (num_online_cpus() == 1) | ||
323 | if (tboot_wait_for_aps(atomic_read(&ap_wfs_count))) | ||
324 | return NOTIFY_BAD; | ||
325 | break; | ||
326 | } | ||
327 | return NOTIFY_OK; | ||
328 | } | ||
329 | |||
330 | static struct notifier_block tboot_cpu_notifier __cpuinitdata = | ||
331 | { | ||
332 | .notifier_call = tboot_cpu_callback, | ||
333 | }; | ||
334 | |||
335 | static __init int tboot_late_init(void) | ||
336 | { | ||
337 | if (!tboot_enabled()) | ||
338 | return 0; | ||
339 | |||
340 | tboot_create_trampoline(); | ||
341 | |||
342 | atomic_set(&ap_wfs_count, 0); | ||
343 | register_hotcpu_notifier(&tboot_cpu_notifier); | ||
344 | return 0; | ||
345 | } | ||
346 | |||
347 | late_initcall(tboot_late_init); | ||
348 | |||
349 | /* | ||
350 | * TXT configuration registers (offsets from TXT_{PUB, PRIV}_CONFIG_REGS_BASE) | ||
351 | */ | ||
352 | |||
353 | #define TXT_PUB_CONFIG_REGS_BASE 0xfed30000 | ||
354 | #define TXT_PRIV_CONFIG_REGS_BASE 0xfed20000 | ||
355 | |||
356 | /* # pages for each config regs space - used by fixmap */ | ||
357 | #define NR_TXT_CONFIG_PAGES ((TXT_PUB_CONFIG_REGS_BASE - \ | ||
358 | TXT_PRIV_CONFIG_REGS_BASE) >> PAGE_SHIFT) | ||
359 | |||
360 | /* offsets from pub/priv config space */ | ||
361 | #define TXTCR_HEAP_BASE 0x0300 | ||
362 | #define TXTCR_HEAP_SIZE 0x0308 | ||
363 | |||
364 | #define SHA1_SIZE 20 | ||
365 | |||
366 | struct sha1_hash { | ||
367 | u8 hash[SHA1_SIZE]; | ||
368 | }; | ||
369 | |||
370 | struct sinit_mle_data { | ||
371 | u32 version; /* currently 6 */ | ||
372 | struct sha1_hash bios_acm_id; | ||
373 | u32 edx_senter_flags; | ||
374 | u64 mseg_valid; | ||
375 | struct sha1_hash sinit_hash; | ||
376 | struct sha1_hash mle_hash; | ||
377 | struct sha1_hash stm_hash; | ||
378 | struct sha1_hash lcp_policy_hash; | ||
379 | u32 lcp_policy_control; | ||
380 | u32 rlp_wakeup_addr; | ||
381 | u32 reserved; | ||
382 | u32 num_mdrs; | ||
383 | u32 mdrs_off; | ||
384 | u32 num_vtd_dmars; | ||
385 | u32 vtd_dmars_off; | ||
386 | } __packed; | ||
387 | |||
388 | struct acpi_table_header *tboot_get_dmar_table(struct acpi_table_header *dmar_tbl) | ||
389 | { | ||
390 | void *heap_base, *heap_ptr, *config; | ||
391 | |||
392 | if (!tboot_enabled()) | ||
393 | return dmar_tbl; | ||
394 | |||
395 | /* | ||
396 | * ACPI tables may not be DMA protected by tboot, so use DMAR copy | ||
397 | * SINIT saved in SinitMleData in TXT heap (which is DMA protected) | ||
398 | */ | ||
399 | |||
400 | /* map config space in order to get heap addr */ | ||
401 | config = ioremap(TXT_PUB_CONFIG_REGS_BASE, NR_TXT_CONFIG_PAGES * | ||
402 | PAGE_SIZE); | ||
403 | if (!config) | ||
404 | return NULL; | ||
405 | |||
406 | /* now map TXT heap */ | ||
407 | heap_base = ioremap(*(u64 *)(config + TXTCR_HEAP_BASE), | ||
408 | *(u64 *)(config + TXTCR_HEAP_SIZE)); | ||
409 | iounmap(config); | ||
410 | if (!heap_base) | ||
411 | return NULL; | ||
412 | |||
413 | /* walk heap to SinitMleData */ | ||
414 | /* skip BiosData */ | ||
415 | heap_ptr = heap_base + *(u64 *)heap_base; | ||
416 | /* skip OsMleData */ | ||
417 | heap_ptr += *(u64 *)heap_ptr; | ||
418 | /* skip OsSinitData */ | ||
419 | heap_ptr += *(u64 *)heap_ptr; | ||
420 | /* now points to SinitMleDataSize; set to SinitMleData */ | ||
421 | heap_ptr += sizeof(u64); | ||
422 | /* get addr of DMAR table */ | ||
423 | dmar_tbl = (struct acpi_table_header *)(heap_ptr + | ||
424 | ((struct sinit_mle_data *)heap_ptr)->vtd_dmars_off - | ||
425 | sizeof(u64)); | ||
426 | |||
427 | /* don't unmap heap because dmar.c needs access to this */ | ||
428 | |||
429 | return dmar_tbl; | ||
430 | } | ||
431 | |||
432 | int tboot_force_iommu(void) | ||
433 | { | ||
434 | if (!tboot_enabled()) | ||
435 | return 0; | ||
436 | |||
437 | if (no_iommu || swiotlb || dmar_disabled) | ||
438 | pr_warning("Forcing Intel-IOMMU to enabled\n"); | ||
439 | |||
440 | dmar_disabled = 0; | ||
441 | #ifdef CONFIG_SWIOTLB | ||
442 | swiotlb = 0; | ||
443 | #endif | ||
444 | no_iommu = 0; | ||
445 | |||
446 | return 1; | ||
447 | } | ||