^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * tboot.c: main implementation of helper functions used by kernel for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * runtime support of Intel(R) Trusted Execution Technology
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (c) 2006-2009, Intel Corporation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/intel-iommu.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/init_task.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/spinlock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/dmar.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/cpu.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/pfn.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/tboot.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/debugfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <asm/realmode.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <asm/processor.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <asm/bootparam.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <asm/pgalloc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <asm/swiotlb.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <asm/fixmap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <asm/proto.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include <asm/setup.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include <asm/e820/api.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include <asm/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #include "../realmode/rm/wakeup.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) /* Global pointer to shared data; NULL means no measured launch. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) static struct tboot *tboot __read_mostly;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) /* timeout for APs (in secs) to enter wait-for-SIPI state during shutdown */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #define AP_WAIT_TIMEOUT 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #undef pr_fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #define pr_fmt(fmt) "tboot: " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) static u8 tboot_uuid[16] __initdata = TBOOT_UUID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) bool tboot_enabled(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) return tboot != NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) void __init tboot_probe(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) /* Look for valid page-aligned address for shared page. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) if (!boot_params.tboot_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) * also verify that it is mapped as we expect it before calling
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) * set_fixmap(), to reduce chance of garbage value causing crash
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) if (!e820__mapped_any(boot_params.tboot_addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) boot_params.tboot_addr, E820_TYPE_RESERVED)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) pr_warn("non-0 tboot_addr but it is not of type E820_TYPE_RESERVED\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) /* Map and check for tboot UUID. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) set_fixmap(FIX_TBOOT_BASE, boot_params.tboot_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) tboot = (struct tboot *)fix_to_virt(FIX_TBOOT_BASE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) if (memcmp(&tboot_uuid, &tboot->uuid, sizeof(tboot->uuid))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) pr_warn("tboot at 0x%llx is invalid\n", boot_params.tboot_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) tboot = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) if (tboot->version < 5) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) pr_warn("tboot version is invalid: %u\n", tboot->version);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) tboot = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) pr_info("found shared page at phys addr 0x%llx:\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) boot_params.tboot_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) pr_debug("version: %d\n", tboot->version);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) pr_debug("log_addr: 0x%08x\n", tboot->log_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) pr_debug("shutdown_entry: 0x%x\n", tboot->shutdown_entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) pr_debug("tboot_base: 0x%08x\n", tboot->tboot_base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) pr_debug("tboot_size: 0x%x\n", tboot->tboot_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) static pgd_t *tboot_pg_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) static struct mm_struct tboot_mm = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) .mm_rb = RB_ROOT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) .pgd = swapper_pg_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) .mm_users = ATOMIC_INIT(2),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) .mm_count = ATOMIC_INIT(1),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) .write_protect_seq = SEQCNT_ZERO(tboot_mm.write_protect_seq),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) MMAP_LOCK_INITIALIZER(init_mm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) .page_table_lock = __SPIN_LOCK_UNLOCKED(init_mm.page_table_lock),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) .mmlist = LIST_HEAD_INIT(init_mm.mmlist),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) static inline void switch_to_tboot_pt(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) write_cr3(virt_to_phys(tboot_pg_dir));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) static int map_tboot_page(unsigned long vaddr, unsigned long pfn,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) pgprot_t prot)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) pgd_t *pgd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) p4d_t *p4d;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) pud_t *pud;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) pmd_t *pmd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) pte_t *pte;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) pgd = pgd_offset(&tboot_mm, vaddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) p4d = p4d_alloc(&tboot_mm, pgd, vaddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) if (!p4d)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) pud = pud_alloc(&tboot_mm, p4d, vaddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) if (!pud)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) pmd = pmd_alloc(&tboot_mm, pud, vaddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) if (!pmd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) pte = pte_alloc_map(&tboot_mm, pmd, vaddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) if (!pte)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) set_pte_at(&tboot_mm, vaddr, pte, pfn_pte(pfn, prot));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) pte_unmap(pte);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) * PTI poisons low addresses in the kernel page tables in the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) * name of making them unusable for userspace. To execute
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) * code at such a low address, the poison must be cleared.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) * Note: 'pgd' actually gets set in p4d_alloc() _or_
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) * pud_alloc() depending on 4/5-level paging.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) pgd->pgd &= ~_PAGE_NX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) static int map_tboot_pages(unsigned long vaddr, unsigned long start_pfn,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) unsigned long nr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) /* Reuse the original kernel mapping */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) tboot_pg_dir = pgd_alloc(&tboot_mm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) if (!tboot_pg_dir)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) for (; nr > 0; nr--, vaddr += PAGE_SIZE, start_pfn++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) if (map_tboot_page(vaddr, start_pfn, PAGE_KERNEL_EXEC))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) static void tboot_create_trampoline(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) u32 map_base, map_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) /* Create identity map for tboot shutdown code. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) map_base = PFN_DOWN(tboot->tboot_base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) map_size = PFN_UP(tboot->tboot_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) if (map_tboot_pages(map_base << PAGE_SHIFT, map_base, map_size))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) panic("tboot: Error mapping tboot pages (mfns) @ 0x%x, 0x%x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) map_base, map_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) #ifdef CONFIG_ACPI_SLEEP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) static void add_mac_region(phys_addr_t start, unsigned long size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) struct tboot_mac_region *mr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) phys_addr_t end = start + size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) if (tboot->num_mac_regions >= MAX_TB_MAC_REGIONS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) panic("tboot: Too many MAC regions\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) if (start && size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) mr = &tboot->mac_regions[tboot->num_mac_regions++];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) mr->start = round_down(start, PAGE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) mr->size = round_up(end, PAGE_SIZE) - mr->start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) static int tboot_setup_sleep(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) tboot->num_mac_regions = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) for (i = 0; i < e820_table->nr_entries; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) if ((e820_table->entries[i].type != E820_TYPE_RAM)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) && (e820_table->entries[i].type != E820_TYPE_RESERVED_KERN))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) add_mac_region(e820_table->entries[i].addr, e820_table->entries[i].size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) tboot->acpi_sinfo.kernel_s3_resume_vector =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) real_mode_header->wakeup_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) #else /* no CONFIG_ACPI_SLEEP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) static int tboot_setup_sleep(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) /* S3 shutdown requested, but S3 not supported by the kernel... */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) BUG();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) void tboot_shutdown(u32 shutdown_type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) void (*shutdown)(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) if (!tboot_enabled())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) * if we're being called before the 1:1 mapping is set up then just
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) * return and let the normal shutdown happen; this should only be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) * due to very early panic()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) if (!tboot_pg_dir)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) /* if this is S3 then set regions to MAC */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) if (shutdown_type == TB_SHUTDOWN_S3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) if (tboot_setup_sleep())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) tboot->shutdown_type = shutdown_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) switch_to_tboot_pt();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) shutdown = (void(*)(void))(unsigned long)tboot->shutdown_entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) shutdown();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) /* should not reach here */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) while (1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) halt();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) static void tboot_copy_fadt(const struct acpi_table_fadt *fadt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) #define TB_COPY_GAS(tbg, g) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) tbg.space_id = g.space_id; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) tbg.bit_width = g.bit_width; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) tbg.bit_offset = g.bit_offset; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) tbg.access_width = g.access_width; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) tbg.address = g.address;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) TB_COPY_GAS(tboot->acpi_sinfo.pm1a_cnt_blk, fadt->xpm1a_control_block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) TB_COPY_GAS(tboot->acpi_sinfo.pm1b_cnt_blk, fadt->xpm1b_control_block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) TB_COPY_GAS(tboot->acpi_sinfo.pm1a_evt_blk, fadt->xpm1a_event_block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) TB_COPY_GAS(tboot->acpi_sinfo.pm1b_evt_blk, fadt->xpm1b_event_block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) * We need phys addr of waking vector, but can't use virt_to_phys() on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) * &acpi_gbl_FACS because it is ioremap'ed, so calc from FACS phys
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) * addr.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) tboot->acpi_sinfo.wakeup_vector = fadt->facs +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) offsetof(struct acpi_table_facs, firmware_waking_vector);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) static int tboot_sleep(u8 sleep_state, u32 pm1a_control, u32 pm1b_control)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) static u32 acpi_shutdown_map[ACPI_S_STATE_COUNT] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) /* S0,1,2: */ -1, -1, -1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) /* S3: */ TB_SHUTDOWN_S3,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) /* S4: */ TB_SHUTDOWN_S4,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) /* S5: */ TB_SHUTDOWN_S5 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) if (!tboot_enabled())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) tboot_copy_fadt(&acpi_gbl_FADT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) tboot->acpi_sinfo.pm1a_cnt_val = pm1a_control;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) tboot->acpi_sinfo.pm1b_cnt_val = pm1b_control;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) /* we always use the 32b wakeup vector */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) tboot->acpi_sinfo.vector_width = 32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) if (sleep_state >= ACPI_S_STATE_COUNT ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) acpi_shutdown_map[sleep_state] == -1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) pr_warn("unsupported sleep state 0x%x\n", sleep_state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) tboot_shutdown(acpi_shutdown_map[sleep_state]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) static int tboot_extended_sleep(u8 sleep_state, u32 val_a, u32 val_b)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) if (!tboot_enabled())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) pr_warn("tboot is not able to suspend on platforms with reduced hardware sleep (ACPIv5)");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) static atomic_t ap_wfs_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) static int tboot_wait_for_aps(int num_aps)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) unsigned long timeout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) timeout = AP_WAIT_TIMEOUT*HZ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) while (atomic_read((atomic_t *)&tboot->num_in_wfs) != num_aps &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) timeout) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) mdelay(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) timeout--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) if (timeout)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) pr_warn("tboot wait for APs timeout\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) return !(atomic_read((atomic_t *)&tboot->num_in_wfs) == num_aps);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) static int tboot_dying_cpu(unsigned int cpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) atomic_inc(&ap_wfs_count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) if (num_online_cpus() == 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) if (tboot_wait_for_aps(atomic_read(&ap_wfs_count)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) #ifdef CONFIG_DEBUG_FS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) #define TBOOT_LOG_UUID { 0x26, 0x25, 0x19, 0xc0, 0x30, 0x6b, 0xb4, 0x4d, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 0x4c, 0x84, 0xa3, 0xe9, 0x53, 0xb8, 0x81, 0x74 }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) #define TBOOT_SERIAL_LOG_ADDR 0x60000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) #define TBOOT_SERIAL_LOG_SIZE 0x08000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) #define LOG_MAX_SIZE_OFF 16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) #define LOG_BUF_OFF 24
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) static uint8_t tboot_log_uuid[16] = TBOOT_LOG_UUID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) static ssize_t tboot_log_read(struct file *file, char __user *user_buf, size_t count, loff_t *ppos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) void __iomem *log_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) u8 log_uuid[16];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) u32 max_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) void *kbuf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) int ret = -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) log_base = ioremap(TBOOT_SERIAL_LOG_ADDR, TBOOT_SERIAL_LOG_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) if (!log_base)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) memcpy_fromio(log_uuid, log_base, sizeof(log_uuid));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) if (memcmp(&tboot_log_uuid, log_uuid, sizeof(log_uuid)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) goto err_iounmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) max_size = readl(log_base + LOG_MAX_SIZE_OFF);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) if (*ppos >= max_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) goto err_iounmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) if (*ppos + count > max_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) count = max_size - *ppos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) kbuf = kmalloc(count, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) if (!kbuf) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) goto err_iounmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) memcpy_fromio(kbuf, log_base + LOG_BUF_OFF + *ppos, count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) if (copy_to_user(user_buf, kbuf, count))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) goto err_kfree;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) *ppos += count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) ret = count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) err_kfree:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) kfree(kbuf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) err_iounmap:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) iounmap(log_base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) static const struct file_operations tboot_log_fops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) .read = tboot_log_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) .llseek = default_llseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) #endif /* CONFIG_DEBUG_FS */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) static __init int tboot_late_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) if (!tboot_enabled())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) tboot_create_trampoline();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) atomic_set(&ap_wfs_count, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) cpuhp_setup_state(CPUHP_AP_X86_TBOOT_DYING, "x86/tboot:dying", NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) tboot_dying_cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) #ifdef CONFIG_DEBUG_FS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) debugfs_create_file("tboot_log", S_IRUSR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) arch_debugfs_dir, NULL, &tboot_log_fops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) acpi_os_set_prepare_sleep(&tboot_sleep);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) acpi_os_set_prepare_extended_sleep(&tboot_extended_sleep);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) late_initcall(tboot_late_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) * TXT configuration registers (offsets from TXT_{PUB, PRIV}_CONFIG_REGS_BASE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) #define TXT_PUB_CONFIG_REGS_BASE 0xfed30000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) #define TXT_PRIV_CONFIG_REGS_BASE 0xfed20000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) /* # pages for each config regs space - used by fixmap */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) #define NR_TXT_CONFIG_PAGES ((TXT_PUB_CONFIG_REGS_BASE - \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) TXT_PRIV_CONFIG_REGS_BASE) >> PAGE_SHIFT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) /* offsets from pub/priv config space */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) #define TXTCR_HEAP_BASE 0x0300
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) #define TXTCR_HEAP_SIZE 0x0308
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) #define SHA1_SIZE 20
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) struct sha1_hash {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) u8 hash[SHA1_SIZE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) struct sinit_mle_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) u32 version; /* currently 6 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) struct sha1_hash bios_acm_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) u32 edx_senter_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) u64 mseg_valid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) struct sha1_hash sinit_hash;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) struct sha1_hash mle_hash;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) struct sha1_hash stm_hash;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) struct sha1_hash lcp_policy_hash;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) u32 lcp_policy_control;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) u32 rlp_wakeup_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) u32 reserved;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) u32 num_mdrs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) u32 mdrs_off;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) u32 num_vtd_dmars;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) u32 vtd_dmars_off;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) struct acpi_table_header *tboot_get_dmar_table(struct acpi_table_header *dmar_tbl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) void *heap_base, *heap_ptr, *config;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) if (!tboot_enabled())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) return dmar_tbl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) * ACPI tables may not be DMA protected by tboot, so use DMAR copy
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) * SINIT saved in SinitMleData in TXT heap (which is DMA protected)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) /* map config space in order to get heap addr */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) config = ioremap(TXT_PUB_CONFIG_REGS_BASE, NR_TXT_CONFIG_PAGES *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) PAGE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) if (!config)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) /* now map TXT heap */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) heap_base = ioremap(*(u64 *)(config + TXTCR_HEAP_BASE),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) *(u64 *)(config + TXTCR_HEAP_SIZE));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) iounmap(config);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) if (!heap_base)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) /* walk heap to SinitMleData */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) /* skip BiosData */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) heap_ptr = heap_base + *(u64 *)heap_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) /* skip OsMleData */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) heap_ptr += *(u64 *)heap_ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) /* skip OsSinitData */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) heap_ptr += *(u64 *)heap_ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) /* now points to SinitMleDataSize; set to SinitMleData */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) heap_ptr += sizeof(u64);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) /* get addr of DMAR table */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) dmar_tbl = (struct acpi_table_header *)(heap_ptr +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) ((struct sinit_mle_data *)heap_ptr)->vtd_dmars_off -
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) sizeof(u64));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) /* don't unmap heap because dmar.c needs access to this */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) return dmar_tbl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) int tboot_force_iommu(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) if (!tboot_enabled())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) if (no_iommu || dmar_disabled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) pr_warn("Forcing Intel-IOMMU to enabled\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) dmar_disabled = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) no_iommu = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
3 Commits
0 Branches
0 Tags