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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [PATCH 01/21] x86/include/asm/intel_txt.h: constants and accessors for TXT registers and heap
From: Krystian Hebel <krystian.hebel@xxxxxxxxx>
The file contains TXT register spaces base address, registers offsets,
error codes and inline functions for accessing structures stored on
TXT heap.
Signed-off-by: Krystian Hebel <krystian.hebel@xxxxxxxxx>
Signed-off-by: Sergii Dmytruk <sergii.dmytruk@xxxxxxxxx>
---
xen/arch/x86/include/asm/intel_txt.h | 272 +++++++++++++++++++++++++++
xen/arch/x86/tboot.c | 20 +-
2 files changed, 274 insertions(+), 18 deletions(-)
create mode 100644 xen/arch/x86/include/asm/intel_txt.h
diff --git a/xen/arch/x86/include/asm/intel_txt.h
b/xen/arch/x86/include/asm/intel_txt.h
new file mode 100644
index 0000000000..2cc6eb5be9
--- /dev/null
+++ b/xen/arch/x86/include/asm/intel_txt.h
@@ -0,0 +1,272 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+/*
+ * TXT configuration registers (offsets from TXT_{PUB, PRIV}_CONFIG_REGS_BASE)
+ */
+#define TXT_PUB_CONFIG_REGS_BASE 0xfed30000
+#define TXT_PRIV_CONFIG_REGS_BASE 0xfed20000
+
+/*
+ * The same set of registers is exposed twice (with different permissions) and
+ * they are allocated continuously with page alignment.
+ */
+#define NR_TXT_CONFIG_SIZE \
+ (TXT_PUB_CONFIG_REGS_BASE - TXT_PRIV_CONFIG_REGS_BASE)
+
+/* Offsets from pub/priv config space. */
+#define TXTCR_STS 0x0000
+#define TXTCR_ESTS 0x0008
+#define TXTCR_ERRORCODE 0x0030
+#define TXTCR_CMD_RESET 0x0038
+#define TXTCR_CMD_CLOSE_PRIVATE 0x0048
+#define TXTCR_DIDVID 0x0110
+#define TXTCR_VER_EMIF 0x0200
+#define TXTCR_CMD_UNLOCK_MEM_CONFIG 0x0218
+#define TXTCR_SINIT_BASE 0x0270
+#define TXTCR_SINIT_SIZE 0x0278
+#define TXTCR_MLE_JOIN 0x0290
+#define TXTCR_HEAP_BASE 0x0300
+#define TXTCR_HEAP_SIZE 0x0308
+#define TXTCR_SCRATCHPAD 0x0378
+#define TXTCR_CMD_OPEN_LOCALITY1 0x0380
+#define TXTCR_CMD_CLOSE_LOCALITY1 0x0388
+#define TXTCR_CMD_OPEN_LOCALITY2 0x0390
+#define TXTCR_CMD_CLOSE_LOCALITY2 0x0398
+#define TXTCR_CMD_SECRETS 0x08e0
+#define TXTCR_CMD_NO_SECRETS 0x08e8
+#define TXTCR_E2STS 0x08f0
+
+/*
+ * Secure Launch Defined Error Codes used in MLE-initiated TXT resets.
+ *
+ * TXT Specification
+ * Appendix I ACM Error Codes
+ */
+#define SLAUNCH_ERROR_GENERIC 0xc0008001
+#define SLAUNCH_ERROR_TPM_INIT 0xc0008002
+#define SLAUNCH_ERROR_TPM_INVALID_LOG20 0xc0008003
+#define SLAUNCH_ERROR_TPM_LOGGING_FAILED 0xc0008004
+#define SLAUNCH_ERROR_REGION_STRADDLE_4GB 0xc0008005
+#define SLAUNCH_ERROR_TPM_EXTEND 0xc0008006
+#define SLAUNCH_ERROR_MTRR_INV_VCNT 0xc0008007
+#define SLAUNCH_ERROR_MTRR_INV_DEF_TYPE 0xc0008008
+#define SLAUNCH_ERROR_MTRR_INV_BASE 0xc0008009
+#define SLAUNCH_ERROR_MTRR_INV_MASK 0xc000800a
+#define SLAUNCH_ERROR_MSR_INV_MISC_EN 0xc000800b
+#define SLAUNCH_ERROR_INV_AP_INTERRUPT 0xc000800c
+#define SLAUNCH_ERROR_INTEGER_OVERFLOW 0xc000800d
+#define SLAUNCH_ERROR_HEAP_WALK 0xc000800e
+#define SLAUNCH_ERROR_HEAP_MAP 0xc000800f
+#define SLAUNCH_ERROR_REGION_ABOVE_4GB 0xc0008010
+#define SLAUNCH_ERROR_HEAP_INVALID_DMAR 0xc0008011
+#define SLAUNCH_ERROR_HEAP_DMAR_SIZE 0xc0008012
+#define SLAUNCH_ERROR_HEAP_DMAR_MAP 0xc0008013
+#define SLAUNCH_ERROR_HI_PMR_BASE 0xc0008014
+#define SLAUNCH_ERROR_HI_PMR_SIZE 0xc0008015
+#define SLAUNCH_ERROR_LO_PMR_BASE 0xc0008016
+#define SLAUNCH_ERROR_LO_PMR_SIZE 0xc0008017
+#define SLAUNCH_ERROR_LO_PMR_MLE 0xc0008018
+#define SLAUNCH_ERROR_INITRD_TOO_BIG 0xc0008019
+#define SLAUNCH_ERROR_HEAP_ZERO_OFFSET 0xc000801a
+#define SLAUNCH_ERROR_WAKE_BLOCK_TOO_SMALL 0xc000801b
+#define SLAUNCH_ERROR_MLE_BUFFER_OVERLAP 0xc000801c
+#define SLAUNCH_ERROR_BUFFER_BEYOND_PMR 0xc000801d
+#define SLAUNCH_ERROR_OS_SINIT_BAD_VERSION 0xc000801e
+#define SLAUNCH_ERROR_EVENTLOG_MAP 0xc000801f
+#define SLAUNCH_ERROR_TPM_NUMBER_ALGS 0xc0008020
+#define SLAUNCH_ERROR_TPM_UNKNOWN_DIGEST 0xc0008021
+#define SLAUNCH_ERROR_TPM_INVALID_EVENT 0xc0008022
+
+#define SLAUNCH_BOOTLOADER_MAGIC 0x4c534254
+
+#ifndef __ASSEMBLY__
+
+/* Need to differentiate between pre- and post paging enabled. */
+#ifdef __EARLY_SLAUNCH__
+#include <xen/macros.h>
+#define _txt(x) _p(x)
+#else
+#include <xen/types.h>
+#include <asm/page.h> // __va()
+#define _txt(x) __va(x)
+#endif
+
+/*
+ * Always use private space as some of registers are either read-only or not
+ * present in public space.
+ */
+static inline uint64_t read_txt_reg(int reg_no)
+{
+ volatile uint64_t *reg = _txt(TXT_PRIV_CONFIG_REGS_BASE + reg_no);
+ return *reg;
+}
+
+static inline void write_txt_reg(int reg_no, uint64_t val)
+{
+ volatile uint64_t *reg = _txt(TXT_PRIV_CONFIG_REGS_BASE + reg_no);
+ *reg = val;
+ /* This serves as TXT register barrier */
+ (void)read_txt_reg(TXTCR_ESTS);
+}
+
+static inline void txt_reset(uint32_t error)
+{
+ write_txt_reg(TXTCR_ERRORCODE, error);
+ write_txt_reg(TXTCR_CMD_NO_SECRETS, 1);
+ write_txt_reg(TXTCR_CMD_UNLOCK_MEM_CONFIG, 1);
+ write_txt_reg(TXTCR_CMD_RESET, 1);
+ while (1);
+}
+
+/*
+ * Secure Launch defined OS/MLE TXT Heap table
+ */
+struct txt_os_mle_data {
+ uint32_t version;
+ uint32_t reserved;
+ uint64_t slrt;
+ uint64_t txt_info;
+ uint32_t ap_wake_block;
+ uint32_t ap_wake_block_size;
+ uint8_t mle_scratch[64];
+} __packed;
+
+/*
+ * TXT specification defined BIOS data TXT Heap table
+ */
+struct txt_bios_data {
+ uint32_t version; /* Currently 5 for TPM 1.2 and 6 for TPM 2.0 */
+ uint32_t bios_sinit_size;
+ uint64_t reserved1;
+ uint64_t reserved2;
+ uint32_t num_logical_procs;
+ /* Versions >= 3 && < 5 */
+ uint32_t sinit_flags;
+ /* Versions >= 5 with updates in version 6 */
+ uint32_t mle_flags;
+ /* Versions >= 4 */
+ /* Ext Data Elements */
+} __packed;
+
+/*
+ * TXT specification defined OS/SINIT TXT Heap table
+ */
+struct txt_os_sinit_data {
+ uint32_t version; /* Currently 6 for TPM 1.2 and 7 for TPM 2.0 */
+ uint32_t flags; /* Reserved in version 6 */
+ uint64_t mle_ptab;
+ uint64_t mle_size;
+ uint64_t mle_hdr_base;
+ uint64_t vtd_pmr_lo_base;
+ uint64_t vtd_pmr_lo_size;
+ uint64_t vtd_pmr_hi_base;
+ uint64_t vtd_pmr_hi_size;
+ uint64_t lcp_po_base;
+ uint64_t lcp_po_size;
+ uint32_t capabilities;
+ /* Version = 5 */
+ uint64_t efi_rsdt_ptr; /* RSD*P* in versions >= 6 */
+ /* Versions >= 6 */
+ /* Ext Data Elements */
+} __packed;
+
+/*
+ * TXT specification defined SINIT/MLE TXT Heap table
+ */
+struct txt_sinit_mle_data {
+ uint32_t version; /* Current values are 6 through 9 */
+ /* Versions <= 8, fields until lcp_policy_control must be 0 for >= 9 */
+ uint8_t bios_acm_id[20];
+ uint32_t edx_senter_flags;
+ uint64_t mseg_valid;
+ uint8_t sinit_hash[20];
+ uint8_t mle_hash[20];
+ uint8_t stm_hash[20];
+ uint8_t lcp_policy_hash[20];
+ uint32_t lcp_policy_control;
+ /* Versions >= 7 */
+ uint32_t rlp_wakeup_addr;
+ uint32_t reserved;
+ uint32_t num_of_sinit_mdrs;
+ uint32_t sinit_mdrs_table_offset;
+ uint32_t sinit_vtd_dmar_table_size;
+ uint32_t sinit_vtd_dmar_table_offset;
+ /* Versions >= 8 */
+ uint32_t processor_scrtm_status;
+ /* Versions >= 9 */
+ /* Ext Data Elements */
+} __packed;
+
+/*
+ * Functions to extract data from the Intel TXT Heap Memory. The layout
+ * of the heap is as follows:
+ * +------------------------------------+
+ * | Size of Bios Data table (uint64_t) |
+ * +------------------------------------+
+ * | Bios Data table |
+ * +------------------------------------+
+ * | Size of OS MLE table (uint64_t) |
+ * +------------------------------------+
+ * | OS MLE table |
+ * +-------------------------------- +
+ * | Size of OS SINIT table (uint64_t) |
+ * +------------------------------------+
+ * | OS SINIT table |
+ * +------------------------------------+
+ * | Size of SINIT MLE table (uint64_t) |
+ * +------------------------------------+
+ * | SINIT MLE table |
+ * +------------------------------------+
+ *
+ * NOTE: the table size fields include the 8 byte size field itself.
+ */
+static inline uint64_t txt_bios_data_size(void *heap)
+{
+ return *((uint64_t *)heap) - sizeof(uint64_t);
+}
+
+static inline void *txt_bios_data_start(void *heap)
+{
+ return heap + sizeof(uint64_t);
+}
+
+static inline uint64_t txt_os_mle_data_size(void *heap)
+{
+ return *((uint64_t *)(txt_bios_data_start(heap) +
+ txt_bios_data_size(heap))) -
+ sizeof(uint64_t);
+}
+
+static inline void *txt_os_mle_data_start(void *heap)
+{
+ return txt_bios_data_start(heap) + txt_bios_data_size(heap) +
+ sizeof(uint64_t);
+}
+
+static inline uint64_t txt_os_sinit_data_size(void *heap)
+{
+ return *((uint64_t *)(txt_os_mle_data_start(heap) +
+ txt_os_mle_data_size(heap))) -
+ sizeof(uint64_t);
+}
+
+static inline void *txt_os_sinit_data_start(void *heap)
+{
+ return txt_os_mle_data_start(heap) + txt_os_mle_data_size(heap) +
+ sizeof(uint64_t);
+}
+
+static inline uint64_t txt_sinit_mle_data_size(void *heap)
+{
+ return *((uint64_t *)(txt_os_sinit_data_start(heap) +
+ txt_os_sinit_data_size(heap))) -
+ sizeof(uint64_t);
+}
+
+static inline void *txt_sinit_mle_data_start(void *heap)
+{
+ return txt_os_sinit_data_start(heap) + txt_os_sinit_data_size(heap) +
+ sizeof(uint64_t);
+}
+
+#endif /* __ASSEMBLY__ */
diff --git a/xen/arch/x86/tboot.c b/xen/arch/x86/tboot.c
index d5db60d335..f68354c374 100644
--- a/xen/arch/x86/tboot.c
+++ b/xen/arch/x86/tboot.c
@@ -15,6 +15,7 @@
#include <asm/tboot.h>
#include <asm/setup.h>
#include <asm/trampoline.h>
+#include <asm/intel_txt.h>
#include <crypto/vmac.h>
@@ -35,23 +36,6 @@ static uint64_t __initdata sinit_base, __initdata sinit_size;
static bool __ro_after_init is_vtd;
-/*
- * TXT configuration registers (offsets from TXT_{PUB, PRIV}_CONFIG_REGS_BASE)
- */
-
-#define TXT_PUB_CONFIG_REGS_BASE 0xfed30000
-#define TXT_PRIV_CONFIG_REGS_BASE 0xfed20000
-
-/* # pages for each config regs space - used by fixmap */
-#define NR_TXT_CONFIG_PAGES ((TXT_PUB_CONFIG_REGS_BASE - \
- TXT_PRIV_CONFIG_REGS_BASE) >> PAGE_SHIFT)
-
-/* offsets from pub/priv config space */
-#define TXTCR_SINIT_BASE 0x0270
-#define TXTCR_SINIT_SIZE 0x0278
-#define TXTCR_HEAP_BASE 0x0300
-#define TXTCR_HEAP_SIZE 0x0308
-
#define SHA1_SIZE 20
typedef uint8_t sha1_hash_t[SHA1_SIZE];
@@ -409,7 +393,7 @@ int __init tboot_protect_mem_regions(void)
/* TXT Private Space */
rc = e820_change_range_type(&e820, TXT_PRIV_CONFIG_REGS_BASE,
- TXT_PRIV_CONFIG_REGS_BASE + NR_TXT_CONFIG_PAGES * PAGE_SIZE,
+ TXT_PRIV_CONFIG_REGS_BASE + NR_TXT_CONFIG_SIZE,
E820_RESERVED, E820_UNUSABLE);
if ( !rc )
return 0;
--
2.49.0
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