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Fri, 27 Aug 2021 13:20:47 +0000 From: Ross Philipson To: linux-kernel@vger.kernel.org, x86@kernel.org, iommu@lists.linux-foundation.org, linux-integrity@vger.kernel.org, linux-doc@vger.kernel.org Cc: ross.philipson@oracle.com, dpsmith@apertussolutions.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, hpa@zytor.com, luto@amacapital.net, kanth.ghatraju@oracle.com, trenchboot-devel@googlegroups.com Subject: [PATCH v4 06/14] x86: Secure Launch main header file Date: Fri, 27 Aug 2021 09:28:29 -0400 Message-Id: <1630070917-9896-7-git-send-email-ross.philipson@oracle.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1630070917-9896-1-git-send-email-ross.philipson@oracle.com> References: <1630070917-9896-1-git-send-email-ross.philipson@oracle.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-ClientProxiedBy: SN6PR05CA0011.namprd05.prod.outlook.com (2603:10b6:805:de::24) To BY5PR10MB3793.namprd10.prod.outlook.com (2603:10b6:a03:1f6::14) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from lateralus.us.oracle.com (209.17.40.45) by SN6PR05CA0011.namprd05.prod.outlook.com (2603:10b6:805:de::24) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4478.8 via Frontend Transport; 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Signed-off-by: Ross Philipson --- include/linux/slaunch.h | 532 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 532 insertions(+) create mode 100644 include/linux/slaunch.h diff --git a/include/linux/slaunch.h b/include/linux/slaunch.h new file mode 100644 index 0000000..c125b67 --- /dev/null +++ b/include/linux/slaunch.h @@ -0,0 +1,532 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Main Secure Launch header file. + * + * Copyright (c) 2021, Oracle and/or its affiliates. + */ + +#ifndef _LINUX_SLAUNCH_H +#define _LINUX_SLAUNCH_H + +/* + * Secure Launch Defined State Flags + */ +#define SL_FLAG_ACTIVE 0x00000001 +#define SL_FLAG_ARCH_SKINIT 0x00000002 +#define SL_FLAG_ARCH_TXT 0x00000004 + +/* + * Secure Launch CPU Type + */ +#define SL_CPU_AMD 1 +#define SL_CPU_INTEL 2 + +#if IS_ENABLED(CONFIG_SECURE_LAUNCH) + +#define __SL32_CS 0x0008 +#define __SL32_DS 0x0010 + +/* + * Intel Safer Mode Extensions (SMX) + * + * Intel SMX provides a programming interface to establish a Measured Launched + * Environment (MLE). The measurement and protection mechanisms supported by the + * capabilities of an Intel Trusted Execution Technology (TXT) platform. SMX is + * the processor’s programming interface in an Intel TXT platform. + * + * See Intel SDM Volume 2 - 6.1 "Safer Mode Extensions Reference" + */ + +/* + * SMX GETSEC Leaf Functions + */ +#define SMX_X86_GETSEC_SEXIT 5 +#define SMX_X86_GETSEC_SMCTRL 7 +#define SMX_X86_GETSEC_WAKEUP 8 + +/* + * Intel Trusted Execution Technology MMIO Registers Banks + */ +#define TXT_PUB_CONFIG_REGS_BASE 0xfed30000 +#define TXT_PRIV_CONFIG_REGS_BASE 0xfed20000 +#define TXT_NR_CONFIG_PAGES ((TXT_PUB_CONFIG_REGS_BASE - \ + TXT_PRIV_CONFIG_REGS_BASE) >> PAGE_SHIFT) + +/* + * Intel Trusted Execution Technology (TXT) Registers + */ +#define TXT_CR_STS 0x0000 +#define TXT_CR_ESTS 0x0008 +#define TXT_CR_ERRORCODE 0x0030 +#define TXT_CR_CMD_RESET 0x0038 +#define TXT_CR_CMD_CLOSE_PRIVATE 0x0048 +#define TXT_CR_DIDVID 0x0110 +#define TXT_CR_VER_EMIF 0x0200 +#define TXT_CR_CMD_UNLOCK_MEM_CONFIG 0x0218 +#define TXT_CR_SINIT_BASE 0x0270 +#define TXT_CR_SINIT_SIZE 0x0278 +#define TXT_CR_MLE_JOIN 0x0290 +#define TXT_CR_HEAP_BASE 0x0300 +#define TXT_CR_HEAP_SIZE 0x0308 +#define TXT_CR_SCRATCHPAD 0x0378 +#define TXT_CR_CMD_OPEN_LOCALITY1 0x0380 +#define TXT_CR_CMD_CLOSE_LOCALITY1 0x0388 +#define TXT_CR_CMD_OPEN_LOCALITY2 0x0390 +#define TXT_CR_CMD_CLOSE_LOCALITY2 0x0398 +#define TXT_CR_CMD_SECRETS 0x08e0 +#define TXT_CR_CMD_NO_SECRETS 0x08e8 +#define TXT_CR_E2STS 0x08f0 + +/* TXT default register value */ +#define TXT_REGVALUE_ONE 0x1ULL + +/* TXTCR_STS status bits */ +#define TXT_SENTER_DONE_STS (1<<0) +#define TXT_SEXIT_DONE_STS (1<<1) + +/* + * SINIT/MLE Capabilities Field Bit Definitions + */ +#define TXT_SINIT_MLE_CAP_WAKE_GETSEC 0 +#define TXT_SINIT_MLE_CAP_WAKE_MONITOR 1 + +/* + * OS/MLE Secure Launch Specific Definitions + */ +#define TXT_OS_MLE_STRUCT_VERSION 1 +#define TXT_OS_MLE_MAX_VARIABLE_MTRRS 32 + +/* + * TXT Heap Table Enumeration + */ +#define TXT_BIOS_DATA_TABLE 1 +#define TXT_OS_MLE_DATA_TABLE 2 +#define TXT_OS_SINIT_DATA_TABLE 3 +#define TXT_SINIT_MLE_DATA_TABLE 4 +#define TXT_SINIT_TABLE_MAX TXT_SINIT_MLE_DATA_TABLE + +/* + * Secure Launch Defined Error Codes used in MLE-initiated TXT resets. + * + * TXT Specification + * Appendix I ACM Error Codes + */ +#define SL_ERROR_GENERIC 0xc0008001 +#define SL_ERROR_TPM_INIT 0xc0008002 +#define SL_ERROR_TPM_INVALID_LOG20 0xc0008003 +#define SL_ERROR_TPM_LOGGING_FAILED 0xc0008004 +#define SL_ERROR_REGION_STRADDLE_4GB 0xc0008005 +#define SL_ERROR_TPM_EXTEND 0xc0008006 +#define SL_ERROR_MTRR_INV_VCNT 0xc0008007 +#define SL_ERROR_MTRR_INV_DEF_TYPE 0xc0008008 +#define SL_ERROR_MTRR_INV_BASE 0xc0008009 +#define SL_ERROR_MTRR_INV_MASK 0xc000800a +#define SL_ERROR_MSR_INV_MISC_EN 0xc000800b +#define SL_ERROR_INV_AP_INTERRUPT 0xc000800c +#define SL_ERROR_INTEGER_OVERFLOW 0xc000800d +#define SL_ERROR_HEAP_WALK 0xc000800e +#define SL_ERROR_HEAP_MAP 0xc000800f +#define SL_ERROR_REGION_ABOVE_4GB 0xc0008010 +#define SL_ERROR_HEAP_INVALID_DMAR 0xc0008011 +#define SL_ERROR_HEAP_DMAR_SIZE 0xc0008012 +#define SL_ERROR_HEAP_DMAR_MAP 0xc0008013 +#define SL_ERROR_HI_PMR_BASE 0xc0008014 +#define SL_ERROR_HI_PMR_SIZE 0xc0008015 +#define SL_ERROR_LO_PMR_BASE 0xc0008016 +#define SL_ERROR_LO_PMR_MLE 0xc0008017 +#define SL_ERROR_INITRD_TOO_BIG 0xc0008018 +#define SL_ERROR_HEAP_ZERO_OFFSET 0xc0008019 +#define SL_ERROR_WAKE_BLOCK_TOO_SMALL 0xc000801a +#define SL_ERROR_MLE_BUFFER_OVERLAP 0xc000801b +#define SL_ERROR_BUFFER_BEYOND_PMR 0xc000801c +#define SL_ERROR_OS_SINIT_BAD_VERSION 0xc000801d +#define SL_ERROR_EVENTLOG_MAP 0xc000801e +#define SL_ERROR_TPM_NUMBER_ALGS 0xc000801f +#define SL_ERROR_TPM_UNKNOWN_DIGEST 0xc0008020 +#define SL_ERROR_TPM_INVALID_EVENT 0xc0008021 + +/* + * Secure Launch Defined Limits + */ +#define TXT_MAX_CPUS 512 +#define TXT_BOOT_STACK_SIZE 24 + +/* + * Secure Launch event log entry type. The TXT specification defines the + * base event value as 0x400 for DRTM values. + */ +#define TXT_EVTYPE_BASE 0x400 +#define TXT_EVTYPE_SLAUNCH (TXT_EVTYPE_BASE + 0x102) +#define TXT_EVTYPE_SLAUNCH_START (TXT_EVTYPE_BASE + 0x103) +#define TXT_EVTYPE_SLAUNCH_END (TXT_EVTYPE_BASE + 0x104) + +/* + * Measured Launch PCRs + */ +#define SL_DEF_IMAGE_PCR17 17 /* TCG Details PCR */ +#define SL_DEF_CONFIG_PCR18 18 /* TCG Authorities PCR */ +#define SL_ALT_CONFIG_PCR19 19 +#define SL_ALT_IMAGE_PCR20 20 + +/* + * MLE scratch area offsets + */ +#define SL_SCRATCH_AP_EBX 0 +#define SL_SCRATCH_AP_JMP_OFFSET 4 +#define SL_SCRATCH_AP_PAUSE 8 + +#ifndef __ASSEMBLY__ + +#include +#include +#include + +/* + * Secure Launch AP wakeup information fetched in SMP boot code. + */ +struct sl_ap_wake_info { + u32 ap_wake_block; + u32 ap_wake_block_size; + u32 ap_jmp_offset; +}; + +/* + * TXT heap extended data elements. + */ +struct txt_heap_ext_data_element { + u32 type; + u32 size; + /* Data */ +} __packed; + +#define TXT_HEAP_EXTDATA_TYPE_END 0 + +struct txt_heap_end_element { + u32 type; + u32 size; +} __packed; + +#define TXT_HEAP_EXTDATA_TYPE_TPM_EVENT_LOG_PTR 5 + +struct txt_heap_event_log_element { + u64 event_log_phys_addr; +} __packed; + +#define TXT_HEAP_EXTDATA_TYPE_EVENT_LOG_POINTER2_1 8 + +struct txt_heap_event_log_pointer2_1_element { + u64 phys_addr; + u32 allocated_event_container_size; + u32 first_record_offset; + u32 next_record_offset; +} __packed; + +/* + * Secure Launch defined MTRR saving structures + */ +struct txt_mtrr_pair { + u64 mtrr_physbase; + u64 mtrr_physmask; +} __packed; + +struct txt_mtrr_state { + u64 default_mem_type; + u64 mtrr_vcnt; + struct txt_mtrr_pair mtrr_pair[TXT_OS_MLE_MAX_VARIABLE_MTRRS]; +} __packed; + +/* + * Secure Launch defined OS/MLE TXT Heap table + */ +struct txt_os_mle_data { + u32 version; + u32 boot_params_addr; + u64 saved_misc_enable_msr; + struct txt_mtrr_state saved_bsp_mtrrs; + u32 ap_wake_block; + u32 ap_wake_block_size; + u64 evtlog_addr; + u32 evtlog_size; + u8 mle_scratch[64]; +} __packed; + +/* + * TXT specification defined BIOS data TXT Heap table + */ +struct txt_bios_data { + u32 version; /* Currently 5 for TPM 1.2 and 6 for TPM 2.0 */ + u32 bios_sinit_size; + u64 reserved1; + u64 reserved2; + u32 num_logical_procs; + /* Versions >= 5 with updates in version 6 */ + u32 sinit_flags; + u32 mle_flags; + /* Versions >= 4 */ + /* Ext Data Elements */ +} __packed; + +/* + * TXT specification defined OS/SINIT TXT Heap table + */ +struct txt_os_sinit_data { + u32 version; /* Currently 6 for TPM 1.2 and 7 for TPM 2.0 */ + u32 flags; + u64 mle_ptab; + u64 mle_size; + u64 mle_hdr_base; + u64 vtd_pmr_lo_base; + u64 vtd_pmr_lo_size; + u64 vtd_pmr_hi_base; + u64 vtd_pmr_hi_size; + u64 lcp_po_base; + u64 lcp_po_size; + u32 capabilities; + /* Version = 5 */ + u64 efi_rsdt_ptr; + /* Versions >= 6 */ + /* Ext Data Elements */ +} __packed; + +/* + * TXT specification defined SINIT/MLE TXT Heap table + */ +struct txt_sinit_mle_data { + u32 version; /* Current values are 6 through 9 */ + /* Versions <= 8 */ + u8 bios_acm_id[20]; + u32 edx_senter_flags; + u64 mseg_valid; + u8 sinit_hash[20]; + u8 mle_hash[20]; + u8 stm_hash[20]; + u8 lcp_policy_hash[20]; + u32 lcp_policy_control; + /* Versions >= 7 */ + u32 rlp_wakeup_addr; + u32 reserved; + u32 num_of_sinit_mdrs; + u32 sinit_mdrs_table_offset; + u32 sinit_vtd_dmar_table_size; + u32 sinit_vtd_dmar_table_offset; + /* Versions >= 8 */ + u32 processor_scrtm_status; + /* Versions >= 9 */ + /* Ext Data Elements */ +} __packed; + +/* + * TXT data reporting structure for memory types + */ +struct txt_sinit_memory_descriptor_record { + u64 address; + u64 length; + u8 type; + u8 reserved[7]; +} __packed; + +/* + * TXT data structure used by a responsive local processor (RLP) to start + * execution in response to a GETSEC[WAKEUP]. + */ +struct smx_rlp_mle_join { + u32 rlp_gdt_limit; + u32 rlp_gdt_base; + u32 rlp_seg_sel; /* cs (ds, es, ss are seg_sel+8) */ + u32 rlp_entry_point; /* phys addr */ +} __packed; + +/* + * TPM event log structures defined in both the TXT specification and + * the TCG documentation. + */ +#define TPM12_EVTLOG_SIGNATURE "TXT Event Container" + +struct tpm12_event_log_header { + char signature[20]; + char reserved[12]; + u8 container_ver_major; + u8 container_ver_minor; + u8 pcr_event_ver_major; + u8 pcr_event_ver_minor; + u32 container_size; + u32 pcr_events_offset; + u32 next_event_offset; + /* PCREvents[] */ +} __packed; + +/* + * Functions to extract data from the Intel TXT Heap Memory. The layout + * of the heap is as follows: + * +----------------------------+ + * | Size Bios Data table (u64) | + * +----------------------------+ + * | Bios Data table | + * +----------------------------+ + * | Size OS MLE table (u64) | + * +----------------------------+ + * | OS MLE table | + * +--------------------------- + + * | Size OS SINIT table (u64) | + * +----------------------------+ + * | OS SINIT table | + * +----------------------------+ + * | Size SINIT MLE table (u64) | + * +----------------------------+ + * | SINIT MLE table | + * +----------------------------+ + * + * NOTE: the table size fields include the 8 byte size field itself. + */ +static inline u64 txt_bios_data_size(void *heap) +{ + return *((u64 *)heap); +} + +static inline void *txt_bios_data_start(void *heap) +{ + return heap + sizeof(u64); +} + +static inline u64 txt_os_mle_data_size(void *heap) +{ + return *((u64 *)(heap + txt_bios_data_size(heap))); +} + +static inline void *txt_os_mle_data_start(void *heap) +{ + return heap + txt_bios_data_size(heap) + sizeof(u64); +} + +static inline u64 txt_os_sinit_data_size(void *heap) +{ + return *((u64 *)(heap + txt_bios_data_size(heap) + + txt_os_mle_data_size(heap))); +} + +static inline void *txt_os_sinit_data_start(void *heap) +{ + return heap + txt_bios_data_size(heap) + + txt_os_mle_data_size(heap) + sizeof(u64); +} + +static inline u64 txt_sinit_mle_data_size(void *heap) +{ + return *((u64 *)(heap + txt_bios_data_size(heap) + + txt_os_mle_data_size(heap) + + txt_os_sinit_data_size(heap))); +} + +static inline void *txt_sinit_mle_data_start(void *heap) +{ + return heap + txt_bios_data_size(heap) + + txt_os_mle_data_size(heap) + + txt_sinit_mle_data_size(heap) + sizeof(u64); +} + +/* + * TPM event logging functions. + */ +static inline struct txt_heap_event_log_pointer2_1_element* +tpm20_find_log2_1_element(struct txt_os_sinit_data *os_sinit_data) +{ + struct txt_heap_ext_data_element *ext_elem; + + /* The extended element array as at the end of this table */ + ext_elem = (struct txt_heap_ext_data_element *) + ((u8 *)os_sinit_data + sizeof(struct txt_os_sinit_data)); + + while (ext_elem->type != TXT_HEAP_EXTDATA_TYPE_END) { + if (ext_elem->type == + TXT_HEAP_EXTDATA_TYPE_EVENT_LOG_POINTER2_1) { + return (struct txt_heap_event_log_pointer2_1_element *) + ((u8 *)ext_elem + + sizeof(struct txt_heap_ext_data_element)); + } + ext_elem = + (struct txt_heap_ext_data_element *) + ((u8 *)ext_elem + ext_elem->size); + } + + return NULL; +} + +static inline int tpm12_log_event(void *evtlog_base, u32 evtlog_size, + u32 event_size, void *event) +{ + struct tpm12_event_log_header *evtlog = + (struct tpm12_event_log_header *)evtlog_base; + + if (memcmp(evtlog->signature, TPM12_EVTLOG_SIGNATURE, + sizeof(TPM12_EVTLOG_SIGNATURE))) + return -EINVAL; + + if (evtlog->container_size > evtlog_size) + return -EINVAL; + + if (evtlog->next_event_offset + event_size > evtlog->container_size) + return -E2BIG; + + memcpy(evtlog_base + evtlog->next_event_offset, event, event_size); + evtlog->next_event_offset += event_size; + + return 0; +} + +static inline int tpm20_log_event(struct txt_heap_event_log_pointer2_1_element *elem, + void *evtlog_base, u32 evtlog_size, + u32 event_size, void *event) +{ + struct tcg_pcr_event *header = + (struct tcg_pcr_event *)evtlog_base; + + /* Has to be at least big enough for the signature */ + if (header->event_size < sizeof(TCG_SPECID_SIG)) + return -EINVAL; + + if (memcmp((u8 *)header + sizeof(struct tcg_pcr_event), + TCG_SPECID_SIG, sizeof(TCG_SPECID_SIG))) + return -EINVAL; + + if (elem->allocated_event_container_size > evtlog_size) + return -EINVAL; + + if (elem->next_record_offset + event_size > + elem->allocated_event_container_size) + return -E2BIG; + + memcpy(evtlog_base + elem->next_record_offset, event, event_size); + elem->next_record_offset += event_size; + + return 0; +} + +/* + * External functions avalailable in compressed kernel. + */ +extern u32 slaunch_get_cpu_type(void); + +/* + * External functions avalailable in mainline kernel. + */ +extern void slaunch_setup_txt(void); +extern u32 slaunch_get_flags(void); +extern struct sl_ap_wake_info *slaunch_get_ap_wake_info(void); +extern struct acpi_table_header *slaunch_get_dmar_table(struct acpi_table_header *dmar); +extern void __noreturn slaunch_txt_reset(void __iomem *txt, + const char *msg, u64 error); +extern void slaunch_finalize(int do_sexit); + +#endif /* !__ASSEMBLY */ + +#else + +#define slaunch_get_cpu_type() 0 +#define slaunch_setup_txt() do { } while (0) +#define slaunch_get_flags() 0 +#define slaunch_get_dmar_table(d) (d) +#define slaunch_finalize(d) do { } while (0) + +#endif /* !IS_ENABLED(CONFIG_SECURE_LAUNCH) */ + +#endif /* _LINUX_SLAUNCH_H */ -- 1.8.3.1