SeaBIOS November 2015

seabios@seabios.org

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48 discussions

Re: [SeaBIOS] SeaBIOS Digest, Vol 72, Issue 33
by Wim Vervoorn 21 Dec '15

21 Dec '15

Hello, I noticed that a lot of work is going on for the TPM support in SeaBIOS. All of this work is TPM 1.2 based. I was wondering if there are any plans to support TPM 2.0 in the future. Best regards, Wim Vervoorn -----Original Message----- From: SeaBIOS [mailto:seabios-bounces@seabios.org] On Behalf Of seabios-request(a)seabios.org Sent: Monday, November 30, 2015 5:50 AM To: seabios(a)seabios.org Subject: SeaBIOS Digest, Vol 72, Issue 33 Send SeaBIOS mailing list submissions to seabios(a)seabios.org To subscribe or unsubscribe via the World Wide Web, visit http://www.seabios.org/mailman/listinfo/seabios or, via email, send a message with subject or body 'help' to seabios-request(a)seabios.org You can reach the person managing the list at seabios-owner(a)seabios.org When replying, please edit your Subject line so it is more specific than "Re: Contents of SeaBIOS digest..." Today's Topics: 1. [PATCH 0/3] tpm: Small fixes and add menu for TPM control (Stefan Berger) 2. [PATCH 3/3] tpm: Add a menu for TPM configuration (Stefan Berger) 3. [PATCH 2/3] tpm: Check length parameter of the array (Stefan Berger) ---------------------------------------------------------------------- Message: 1 Date: Sun, 29 Nov 2015 23:49:40 -0500 From: Stefan Berger <stefanb(a)us.ibm.com> To: seabios(a)seabios.org, kevin(a)koconnor.net Cc: Stefan Berger <stefanb(a)us.ibm.com> Subject: [SeaBIOS] [PATCH 0/3] tpm: Small fixes and add menu for TPM control Message-ID: <1448858983-19505-1-git-send-email-stefanb(a)us.ibm.com> This series provides two small fixes and then adds the menu for TPM control. Regards, Stefan Stefan Berger (3): Remove check for working TPM from TPM interrupt handler Check length parameter of the array tpm: Add a menu for TPM configuration src/boot.c | 9 +- src/std/tcg.h | 41 ++++ src/tcgbios.c | 661 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++- src/tcgbios.h | 2 + src/util.h | 1 + 5 files changed, 708 insertions(+), 6 deletions(-) -- 2.4.3 ------------------------------ Message: 2 Date: Sun, 29 Nov 2015 23:49:43 -0500 From: Stefan Berger <stefanb(a)us.ibm.com> To: seabios(a)seabios.org, kevin(a)koconnor.net Subject: [SeaBIOS] [PATCH 3/3] tpm: Add a menu for TPM configuration Message-ID: <1448858983-19505-4-git-send-email-stefanb(a)us.ibm.com> From: Stefan Berger <stefanb(a)linux.vnet.ibm.com> This patch adds an new menu entry to the main menu. This menu item enables the user to enter a TPM control menu which allows control of those aspects of the TPM's state that can only be controlled while in the firmware and while physical presence can be asserted. If the machine has a TPM, the boot menu will look as follows, with the new menu item accessible by pressing the 't' key. Select boot device: 1. ata0-1: QEMU HARDDISK ATA-7 Hard-Disk (6144 MiBytes) 2. Legacy option rom 3. iPXE (PCI 00:03.0) t. TPM Menu Upon pressing t the TPM submenu will be shown: The Trusted Platform Module (TPM) is a hardware device in this machine. It can help verify the integrity of system software. The current state of the TPM is: Enabled and active Ownership has not been taken A user can take ownership of the TPM Available options are: d. Disable the TPM v. Deactivate the TPM p. Prevent installation of an owner If no change is desired or if this menu was reached by mistake, press ESC to reboot the machine. The TPM menu only shows those options that are currently accessible considering the state of the TPM. The patch adds several functions for sending those messages to the TPM required for supporting those menu items. Signed-off-by: Stefan Berger <stefanb(a)linux.vnet.ibm.com> --- src/boot.c | 9 +- src/std/tcg.h | 41 ++++ src/tcgbios.c | 653 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ src/tcgbios.h | 2 + src/util.h | 1 + 5 files changed, 705 insertions(+), 1 deletion(-) diff --git a/src/boot.c b/src/boot.c index e0f73a3..a251eb4 100644 --- a/src/boot.c +++ b/src/boot.c @@ -427,7 +427,7 @@ get_raw_keystroke(void) } // Read a keystroke - waiting up to 'msec' milliseconds. -static int +int get_keystroke(int msec) { u32 end = irqtimer_calc(msec); @@ -486,6 +486,9 @@ interactive_bootmenu(void) printf("%d. %s\n", maxmenu , strtcpy(desc, pos->description, ARRAY_SIZE(desc))); } + if (tpm_is_working()) { + printf("\nt. TPM Configuration\n"); + } // Get key press. If the menu key is ESC, do not restart boot unless // 1.5 seconds have passed. Otherwise users (trained by years of @@ -496,6 +499,10 @@ interactive_bootmenu(void) scan_code = get_keystroke(1000); if (scan_code == 1 && !irqtimer_check(esc_accepted_time)) continue; + if (tpm_is_working() && scan_code == 20 /* t */) { + printf("\n"); + tpm_menu(); + } if (scan_code >= 1 && scan_code <= maxmenu+1) break; } diff --git a/src/std/tcg.h b/src/std/tcg.h index f6a47c7..d7b3fc4 100644 --- a/src/std/tcg.h +++ b/src/std/tcg.h @@ -292,6 +292,29 @@ struct tpm_res_getcap_perm_flags { struct tpm_permanent_flags perm_flags; } PACKED; +struct tpm_req_getcap_stclear_flags { + TPM_REQ_HEADER + u32 capArea; + u32 subCapSize; + u32 subCap; +} PACKED; + +struct tpm_stclear_flags { + u16 tag; + u8 flags[5]; +} PACKED; + +#define STCLEAR_FLAG_IDX_DEACTIVATED 0 +#define STCLEAR_FLAG_IDX_DISABLE_FORCE_CLEAR 1 +#define STCLEAR_FLAG_IDX_PHYSICAL_PRESENCE 2 +#define STCLEAR_FLAG_IDX_PHYSICAL_PRESENCE_LOCK 3 +#define STCLEAR_FLAG_IDX_GLOBAL_LOCK 4 + +struct tpm_res_getcap_stclear_flags { + TPM_RSP_HEADER + u32 size; + struct tpm_stclear_flags stclear_flags; +} PACKED; struct tpm_res_getcap_ownerauth { TPM_RSP_HEADER @@ -325,4 +348,22 @@ struct tpm_res_sha1complete { u8 hash[20]; } PACKED; +#define TPM_STATE_ENABLED 1 +#define TPM_STATE_ACTIVE 2 +#define TPM_STATE_OWNED 4 +#define TPM_STATE_OWNERINSTALL 8 + +/* + * physical presence interface + */ + +#define TPM_PPI_OP_NOOP 0 +#define TPM_PPI_OP_ENABLE 1 +#define TPM_PPI_OP_DISABLE 2 +#define TPM_PPI_OP_ACTIVATE 3 +#define TPM_PPI_OP_DEACTIVATE 4 +#define TPM_PPI_OP_CLEAR 5 +#define TPM_PPI_OP_SET_OWNERINSTALL_TRUE 8 +#define TPM_PPI_OP_SET_OWNERINSTALL_FALSE 9 + #endif // tcg.h diff --git a/src/tcgbios.c b/src/tcgbios.c index 285723c..e28d3eb 100644 --- a/src/tcgbios.c +++ b/src/tcgbios.c @@ -23,6 +23,8 @@ #include "string.h" // checksum #include "tcgbios.h"// tpm_*, prototypes #include "util.h" // printf, get_keystroke +#include "malloc.h" // malloc_* +#include "stacks.h" // wait_threads static const u8 Startup_ST_CLEAR[] = { 0x00, TPM_ST_CLEAR }; static const u8 Startup_ST_STATE[] = { 0x00, TPM_ST_STATE }; @@ -40,6 +42,11 @@ static const u8 GetCapability_Permanent_Flags[] = { 0x00, 0x00, 0x01, 0x08 }; +static const u8 GetCapability_STClear_Flags[] = { + 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x04, + 0x00, 0x00, 0x01, 0x09 +}; + static const u8 GetCapability_OwnerAuth[] = { 0x00, 0x00, 0x00, 0x05, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x01, 0x11 @@ -88,6 +95,12 @@ tpm_state_t tpm_state VARLOW = { .tpm_driver_to_use = TPM_INVALID_DRIVER, }; +typedef struct { + u8 op; +} tpm_bios_cfg; + +extern void reset_vector(void) __noreturn; + static u32 is_preboot_if_shutdown(void) { @@ -136,6 +149,15 @@ has_working_tpm(void) return tpm_state.tpm_working; } +int +tpm_is_working(void) +{ + if (!CONFIG_TCGBIOS) + return 0; + + return tpm_state.tpm_working; +} + static u32 transmit(u8 locty, struct tpm_req_header *req, void *respbuffer, u32 *respbufferlen, @@ -1169,3 +1191,634 @@ tpm_interrupt_handler32(struct bregs *regs) return; } + +static u32 +read_stclear_flags(char *buf, int buf_len) +{ + u32 rc; + u32 returnCode; + struct tpm_res_getcap_stclear_flags stcf; + + memset(buf, 0, buf_len); + + rc = build_and_send_cmd(0, TPM_ORD_GetCapability, + GetCapability_STClear_Flags, + sizeof(GetCapability_STClear_Flags), + (u8 *)&stcf, sizeof(stcf), + &returnCode, TPM_DURATION_TYPE_SHORT); + + dprintf(DEBUG_tcg, "TCGBIOS: Return code from TPM_GetCapability() " + "= 0x%08x\n", returnCode); + + if (rc || returnCode) + goto err_exit; + + memcpy(buf, &stcf.stclear_flags, buf_len); + + return 0; + +err_exit: + dprintf(DEBUG_tcg, "TCGBIOS: TPM malfunctioning (line %d).\n", __LINE__); + + tpm_set_failure(); + if (rc) + return rc; + return TCG_TCG_COMMAND_ERROR; +} + +static u32 +assert_physical_presence(int verbose) +{ + u32 rc = 0; + u32 returnCode; + struct tpm_stclear_flags stcf; + + rc = read_stclear_flags((char *)&stcf, sizeof(stcf)); + if (rc) { + dprintf(DEBUG_tcg, + "Error reading STClear flags: 0x%08x\n", rc); + return rc; + } + + if (stcf.flags[STCLEAR_FLAG_IDX_PHYSICAL_PRESENCE]) + /* physical presence already asserted */ + return 0; + + rc = build_and_send_cmd(0, TPM_ORD_PhysicalPresence, + PhysicalPresence_CMD_ENABLE, + sizeof(PhysicalPresence_CMD_ENABLE), + NULL, 0, &returnCode, TPM_DURATION_TYPE_SHORT); + + dprintf(DEBUG_tcg, + "Return code from TSC_PhysicalPresence(CMD_ENABLE) = 0x%08x\n", + returnCode); + + if (rc || returnCode) { + if (verbose) + printf("Error: Could not enable physical presence.\n\n"); + goto err_exit; + } + + rc = build_and_send_cmd(0, TPM_ORD_PhysicalPresence, + PhysicalPresence_PRESENT, + sizeof(PhysicalPresence_PRESENT), + NULL, 0, &returnCode, TPM_DURATION_TYPE_SHORT); + + dprintf(DEBUG_tcg, + "Return code from TSC_PhysicalPresence(PRESENT) = 0x%08x\n", + returnCode); + + if (rc || returnCode) { + if (verbose) + printf("Error: Could not set presence flag.\n\n"); + goto err_exit; + } + + return 0; + +err_exit: + dprintf(DEBUG_tcg, "TCGBIOS: TPM malfunctioning (line %d).\n", __LINE__); + + tpm_set_failure(); + if (rc) + return rc; + return TCG_TCG_COMMAND_ERROR; +} + +static u32 +read_permanent_flags(char *buf, int buf_len) +{ + u32 rc; + u32 returnCode; + struct tpm_res_getcap_perm_flags pf; + + memset(buf, 0, buf_len); + + rc = build_and_send_cmd(0, TPM_ORD_GetCapability, + GetCapability_Permanent_Flags, + sizeof(GetCapability_Permanent_Flags), + (u8 *)&pf, sizeof(pf), + &returnCode, TPM_DURATION_TYPE_SHORT); + + dprintf(DEBUG_tcg, "TCGBIOS: Return code from TPM_GetCapability() " + "= 0x%08x\n", returnCode); + + if (rc || returnCode) + goto err_exit; + + memcpy(buf, &pf.perm_flags, buf_len); + + return 0; + +err_exit: + dprintf(DEBUG_tcg, "TCGBIOS: TPM malfunctioning (line %d).\n", __LINE__); + + tpm_set_failure(); + if (rc) + return rc; + return TCG_TCG_COMMAND_ERROR; +} + +static u32 +read_has_owner(int *has_owner) +{ + u32 rc; + u32 returnCode; + struct tpm_res_getcap_ownerauth oauth; + + rc = build_and_send_cmd(0, TPM_ORD_GetCapability, + GetCapability_OwnerAuth, + sizeof(GetCapability_OwnerAuth), + (u8 *)&oauth, sizeof(oauth), + &returnCode, TPM_DURATION_TYPE_SHORT); + + dprintf(DEBUG_tcg, "TCGBIOS: Return code from TPM_GetCapability() " + "= 0x%08x\n", returnCode); + + if (rc || returnCode) + goto err_exit; + + *has_owner = oauth.flag; + + return 0; + +err_exit: + dprintf(DEBUG_tcg,"TCGBIOS: TPM malfunctioning (line %d).\n", __LINE__); + + tpm_set_failure(); + if (rc) + return rc; + return TCG_TCG_COMMAND_ERROR; +} + +static u32 +enable_tpm(int enable, u32 *returnCode, int verbose) +{ + u32 rc; + struct tpm_permanent_flags pf; + + rc = read_permanent_flags((char *)&pf, sizeof(pf)); + if (rc) + return rc; + + if (pf.flags[PERM_FLAG_IDX_DISABLE] && !enable) + return 0; + + rc = assert_physical_presence(verbose); + if (rc) { + dprintf(DEBUG_tcg, "TCGBIOS: Asserting physical presence failed.\n"); + return rc; + } + + rc = build_and_send_cmd(0, enable ? TPM_ORD_PhysicalEnable + : TPM_ORD_PhysicalDisable, + NULL, 0, NULL, 0, returnCode, + TPM_DURATION_TYPE_SHORT); + if (enable) + dprintf(DEBUG_tcg, "Return code from TPM_PhysicalEnable = 0x%08x\n", + *returnCode); + else + dprintf(DEBUG_tcg, "Return code from TPM_PhysicalDisable = 0x%08x\n", + *returnCode); + + if (rc || *returnCode) + goto err_exit; + + return 0; + +err_exit: + if (enable) + dprintf(DEBUG_tcg, "TCGBIOS: Enabling the TPM failed.\n"); + else + dprintf(DEBUG_tcg, "TCGBIOS: Disabling the TPM failed.\n"); + + dprintf(DEBUG_tcg, "TCGBIOS: TPM malfunctioning (line %d).\n", __LINE__); + + tpm_set_failure(); + if (rc) + return rc; + return TCG_TCG_COMMAND_ERROR; +} + +static u32 +activate_tpm(int activate, int allow_reset, u32 *returnCode, int verbose) +{ + u32 rc; + struct tpm_permanent_flags pf; + + rc = read_permanent_flags((char *)&pf, sizeof(pf)); + if (rc) + return rc; + + if (pf.flags[PERM_FLAG_IDX_DEACTIVATED] && !activate) + return 0; + + if (pf.flags[PERM_FLAG_IDX_DISABLE]) + return 0; + + rc = assert_physical_presence(verbose); + if (rc) { + dprintf(DEBUG_tcg, "TCGBIOS: Asserting physical presence failed.\n"); + return rc; + } + + rc = build_and_send_cmd(0, TPM_ORD_PhysicalSetDeactivated, + activate ? CommandFlag_FALSE + : CommandFlag_TRUE, + activate ? sizeof(CommandFlag_FALSE) + : sizeof(CommandFlag_TRUE), + NULL, 0, returnCode, TPM_DURATION_TYPE_SHORT); + + dprintf(DEBUG_tcg, + "Return code from PhysicalSetDeactivated(%d) = 0x%08x\n", + activate ? 0 : 1, *returnCode); + + if (rc || *returnCode) + goto err_exit; + + if (activate && allow_reset) { + if (verbose) { + printf("Requiring a reboot to activate the TPM.\n"); + + msleep(2000); + } + reset_vector(); + } + + return 0; + +err_exit: + dprintf(DEBUG_tcg, "TCGBIOS: TPM malfunctioning (line %d).\n", __LINE__); + + tpm_set_failure(); + if (rc) + return rc; + return TCG_TCG_COMMAND_ERROR; +} + +static u32 +enable_activate(int allow_reset, u32 *returnCode, int verbose) +{ + u32 rc; + + rc = enable_tpm(1, returnCode, verbose); + if (rc) + return rc; + + rc = activate_tpm(1, allow_reset, returnCode, verbose); + + return rc; +} + +static u32 +force_clear(int enable_activate_before, int enable_activate_after, + u32 *returnCode, int verbose) +{ + u32 rc; + int has_owner; + + rc = read_has_owner(&has_owner); + if (rc) + return rc; + if (!has_owner) { + if (verbose) + printf("TPM does not have an owner.\n"); + return 0; + } + + if (enable_activate_before) { + rc = enable_activate(0, returnCode, verbose); + if (rc) { + dprintf(DEBUG_tcg, + "TCGBIOS: Enabling/activating the TPM failed.\n"); + return rc; + } + } + + rc = assert_physical_presence(verbose); + if (rc) { + dprintf(DEBUG_tcg, "TCGBIOS: Asserting physical presence failed.\n"); + return rc; + } + + rc = build_and_send_cmd(0, TPM_ORD_ForceClear, + NULL, 0, NULL, 0, returnCode, + TPM_DURATION_TYPE_SHORT); + + dprintf(DEBUG_tcg, "Return code from TPM_ForceClear() = 0x%08x\n", + *returnCode); + + if (rc || *returnCode) + goto err_exit; + + if (!enable_activate_after) { + if (verbose) + printf("Owner successfully cleared.\n" + "You will need to enable/activate the TPM again.\n\n"); + return 0; + } + + enable_activate(1, returnCode, verbose); + + return 0; + +err_exit: + dprintf(DEBUG_tcg, "TCGBIOS: TPM malfunctioning (line %d).\n", __LINE__); + + tpm_set_failure(); + if (rc) + return rc; + return TCG_TCG_COMMAND_ERROR; +} + +static u32 +set_owner_install(int allow, u32 *returnCode, int verbose) +{ + u32 rc; + int has_owner; + struct tpm_permanent_flags pf; + + rc = read_has_owner(&has_owner); + if (rc) + return rc; + if (has_owner) { + if (verbose) + printf("Must first remove owner.\n"); + return 0; + } + + rc = read_permanent_flags((char *)&pf, sizeof(pf)); + if (rc) + return rc; + + if (pf.flags[PERM_FLAG_IDX_DISABLE]) { + if (verbose) + printf("TPM must first be enable.\n"); + return 0; + } + + rc = assert_physical_presence(verbose); + if (rc) { + dprintf(DEBUG_tcg, "TCGBIOS: Asserting physical presence failed.\n"); + return rc; + } + + rc = build_and_send_cmd(0, TPM_ORD_SetOwnerInstall, + (allow) ? CommandFlag_TRUE : + CommandFlag_FALSE, + sizeof(CommandFlag_TRUE), + NULL, 0, returnCode, TPM_DURATION_TYPE_SHORT); + + dprintf(DEBUG_tcg, "Return code from TPM_SetOwnerInstall() = 0x%08x\n", + *returnCode); + + if (rc || *returnCode) + goto err_exit; + + if (verbose) + printf("Installation of owner %s.\n", allow ? "enabled" : "disabled"); + + return 0; + +err_exit: + dprintf(DEBUG_tcg, "TCGBIOS: TPM malfunctioning (line %d).\n", __LINE__); + tpm_set_failure(); + if (rc) + return rc; + return TCG_TCG_COMMAND_ERROR; +} + +static u32 +tpm_process_cfg(const tpm_bios_cfg *cfg, int verbose, u32 *returnCode) +{ + u32 rc = 0; + + switch (cfg->op) { + case TPM_PPI_OP_NOOP: /* no-op */ + break; + + case TPM_PPI_OP_ENABLE: + rc = enable_tpm(1, returnCode, verbose); + break; + + case TPM_PPI_OP_DISABLE: + rc = enable_tpm(0, returnCode, verbose); + break; + + case TPM_PPI_OP_ACTIVATE: + rc = activate_tpm(1, 1, returnCode, verbose); + break; + + case TPM_PPI_OP_DEACTIVATE: + rc = activate_tpm(0, 1, returnCode, verbose); + break; + + case TPM_PPI_OP_CLEAR: + rc = force_clear(1, 0, returnCode, verbose); + break; + + case TPM_PPI_OP_SET_OWNERINSTALL_TRUE: + rc = set_owner_install(1, returnCode, verbose); + break; + + case TPM_PPI_OP_SET_OWNERINSTALL_FALSE: + rc = set_owner_install(0, returnCode, verbose); + break; + + default: + break; + } + + if (rc) + printf("Op %d: An error occurred: 0x%x TPM return code: 0x%x\n", + cfg->op, rc, *returnCode); + + return rc; +} + +static int +get_tpm_state(void) +{ + int state = 0; + struct tpm_permanent_flags pf; + int has_owner; + + if (read_permanent_flags((char *)&pf, sizeof(pf)) || + read_has_owner(&has_owner)) + return ~0; + + if (!pf.flags[PERM_FLAG_IDX_DISABLE]) + state |= TPM_STATE_ENABLED; + + if (!pf.flags[PERM_FLAG_IDX_DEACTIVATED]) + state |= TPM_STATE_ACTIVE; + + if (has_owner) { + state |= TPM_STATE_OWNED; + } else { + if (pf.flags[PERM_FLAG_IDX_OWNERSHIP]) + state |= TPM_STATE_OWNERINSTALL; + } + + return state; +} + +static void +show_tpm_menu(int state, int next_scancodes[7]) +{ + int i = 0; + + printf("\nThe current state of the TPM is:\n"); + + if (state & TPM_STATE_ENABLED) + printf(" Enabled"); + else + printf(" Disabled"); + + if (state & TPM_STATE_ACTIVE) + printf(" and active\n"); + else + printf(" and deactivated\n"); + + if (state & TPM_STATE_OWNED) + printf(" Ownership has been taken\n"); + else { + printf(" Ownership has not been taken\n"); + if (state & TPM_STATE_OWNERINSTALL) + printf(" A user can take ownership of the TPM\n"); + else + printf(" Taking ownership of the TPM has been disabled\n"); + } + + if ((state & (TPM_STATE_ENABLED | TPM_STATE_ACTIVE)) != + (TPM_STATE_ENABLED | TPM_STATE_ACTIVE)) { + printf("\nNote: To make use of all functionality, the TPM must be " + "enabled and active.\n"); + } + + printf("\nAvailable options are:\n"); + if (state & TPM_STATE_ENABLED) { + printf(" d. Disable the TPM\n"); + next_scancodes[i++] = 32; + + if (state & TPM_STATE_ACTIVE) { + printf(" v. Deactivate the TPM\n"); + next_scancodes[i++] = 47; + + if (state & TPM_STATE_OWNERINSTALL) { + printf(" p. Prevent installation of an owner\n"); + next_scancodes[i++] = 25; + } else { + printf(" s. Allow installation of an owner\n"); + next_scancodes[i++] = 31; + } + } else { + printf(" a. Activate the TPM\n"); + next_scancodes[i++] = 30; + } + + } else { + printf(" e. Enable the TPM\n"); + next_scancodes[i++] = 18; + } + + if (state & TPM_STATE_OWNED) { + printf(" c. Clear ownership\n"); + next_scancodes[i++] = 46; + } + + next_scancodes[i++] = 0; +} + +void +tpm_menu(void) +{ + if (!CONFIG_TCGBIOS) + return; + + int scancode, next_scancodes[7]; + u32 rc, returnCode; + tpm_bios_cfg cfg = { + .op = TPM_PPI_OP_NOOP, + }; + int state = 0, i; + int waitkey; + + while (get_keystroke(0) >= 0) + ; + wait_threads(); + + printf("The Trusted Platform Module (TPM) is a hardware device in " + "this machine.\n" + "It can help verify the integrity of system software.\n\n"); + + for (;;) { + if ((state = get_tpm_state()) != ~0) { + show_tpm_menu(state, next_scancodes); + } else { + printf("TPM is not working correctly.\n"); + return; + } + + printf("\nIf no change is desired or if this menu was reached by " + "mistake, press ESC to\n" + "reboot the machine.\n"); + + cfg.op = TPM_PPI_OP_NOOP; + + waitkey = 1; + + while (waitkey) { + while ((scancode = get_keystroke(1000)) == ~0) + ; + + switch (scancode) { + case 1: + // ESC + reset_vector(); + break; + case 18: /* e. enable */ + cfg.op = TPM_PPI_OP_ENABLE; + break; + case 32: /* d. disable */ + cfg.op = TPM_PPI_OP_DISABLE; + break; + case 30: /* a. activate */ + cfg.op = TPM_PPI_OP_ACTIVATE; + break; + case 47: /* v. deactivate */ + cfg.op = TPM_PPI_OP_DEACTIVATE; + break; + case 46: /* c. clear owner */ + cfg.op = TPM_PPI_OP_CLEAR; + break; + case 25: /* p. prevent ownerinstall */ + cfg.op = TPM_PPI_OP_SET_OWNERINSTALL_FALSE; + break; + case 31: /* s. allow ownerinstall */ + cfg.op = TPM_PPI_OP_SET_OWNERINSTALL_TRUE; + break; + default: + continue; + } + + /* + * Using the next_scancodes array, check whether the + * pressed key is currently a valid option. + */ + for (i = 0; i < sizeof(next_scancodes); i++) { + if (next_scancodes[i] == 0) + break; + + if (next_scancodes[i] == scancode) { + rc = tpm_process_cfg(&cfg, 1, &returnCode); + + if (rc) + printf("An error occurred: 0x%x\n", rc); + waitkey = 0; + break; + } + } + } + } +} diff --git a/src/tcgbios.h b/src/tcgbios.h index 4d69b1e..7934fc3 100644 --- a/src/tcgbios.h +++ b/src/tcgbios.h @@ -13,5 +13,7 @@ u32 tpm_add_bcv(u32 bootdrv, const u8 *addr, u32 length); u32 tpm_add_cdrom(u32 bootdrv, const u8 *addr, u32 length); u32 tpm_add_cdrom_catalog(const u8 *addr, u32 length); u32 tpm_option_rom(const void *addr, u32 len); +int tpm_is_working(void); +void tpm_menu(void); #endif /* TCGBIOS_H */ diff --git a/src/util.h b/src/util.h index 7fcd6dc..76db57f 100644 --- a/src/util.h +++ b/src/util.h @@ -36,6 +36,7 @@ int bootprio_find_pci_rom(struct pci_device *pci, int instance); int bootprio_find_named_rom(const char *name, int instance); struct usbdevice_s; int bootprio_find_usb(struct usbdevice_s *usbdev, int lun); +int get_keystroke(int msec); // bootsplash.c void enable_vga_console(void); -- 2.4.3 ------------------------------ Message: 3 Date: Sun, 29 Nov 2015 23:49:42 -0500 From: Stefan Berger <stefanb(a)us.ibm.com> To: seabios(a)seabios.org, kevin(a)koconnor.net Subject: [SeaBIOS] [PATCH 2/3] tpm: Check length parameter of the array Message-ID: <1448858983-19505-3-git-send-email-stefanb(a)us.ibm.com> From: Stefan Berger <stefanb(a)linux.vnet.ibm.com> Check the length parameter that indicates the length of the array for whether it has a minimum value of 0x200. Signed-off-by: Stefan Berger <stefanb(a)linux.vnet.ibm.com> --- src/tcgbios.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/src/tcgbios.c b/src/tcgbios.c index c17d80d..285723c 100644 --- a/src/tcgbios.c +++ b/src/tcgbios.c @@ -766,6 +766,9 @@ tpm_add_bcv(u32 bootdrv, const u8 *addr, u32 length) if (!has_working_tpm()) return TCG_GENERAL_ERROR; + if (length < 0x200) + return TCG_INVALID_INPUT_PARA; + const char *string = "Booting BCV device 00h (Floppy)"; if (bootdrv == 0x80) string = "Booting BCV device 80h (HDD)"; -- 2.4.3 ------------------------------ Subject: Digest Footer _______________________________________________ SeaBIOS mailing list SeaBIOS(a)seabios.org http://www.seabios.org/mailman/listinfo/seabios ------------------------------ End of SeaBIOS Digest, Vol 72, Issue 33 ***************************************

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[PATCH 0/3] tpm: Small fixes and add menu for TPM control
by Stefan Berger 20 Dec '15

20 Dec '15

This series provides two small fixes and then adds the menu for TPM control. Regards, Stefan Stefan Berger (3): Remove check for working TPM from TPM interrupt handler Check length parameter of the array tpm: Add a menu for TPM configuration src/boot.c | 9 +- src/std/tcg.h | 41 ++++ src/tcgbios.c | 661 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++- src/tcgbios.h | 2 + src/util.h | 1 + 5 files changed, 708 insertions(+), 6 deletions(-) -- 2.4.3

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[PATCH v2 0/3] tpm: Small fixes and add menu for TPM control
by Stefan Berger 20 Dec '15

20 Dec '15

This series provides two small fixes and then adds the menu for TPM control. Regards, Stefan v1->v2: - using 'typedef u8 tpm_ppi_code' for storing the TPM menu's 'message codes' in. Stefan Berger (3): tpm: Remove check for working TPM from TPM interrupt handler tpm: Check length parameter of the array tpm: Add a menu for TPM configuration src/boot.c | 9 +- src/std/tcg.h | 41 ++++ src/tcgbios.c | 654 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++- src/tcgbios.h | 2 + src/util.h | 1 + 5 files changed, 701 insertions(+), 6 deletions(-) -- 2.4.3

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Re: [SeaBIOS] [Qemu-devel] [PATCH] SeaBios: Fix reset procedure reentrancy problem on qemu-kvm platform
by Kevin O'Connor 19 Dec '15

19 Dec '15

On Thu, Nov 19, 2015 at 12:42:50PM +0000, Xulei (Stone) wrote: > Kevin, > > After deeply analyzing, i think there may be 3 possible reasons: > 1)wrong CountCPUs value. It seems CountCPUs++ in handle_smp() has no > lock to protect. So, sometimes, 2 or more vcpu may get the same > current value of CountCPUs. Then we'll get a single incrementation > instead of 2 or more and "while (cmos_smp_count != CountCPUs)" will > loop forever; The handle_smp() code is called from romlayout.S:entry_smp() which does take a lock. So, all of handle_smp() should run synchronous. > 2)wrong cmos_smp_count value. SeaBIOS rtc reads an incorrect number? Not sure - the last time there were problems in this area of the code others used kvmtrace to try and track this down. Since you are getting dprintf statements, you could also try outputting cmos_smp_count prior to the loop (see patch below). > 3)yield() stuck. Is it possible that SeaBIOS is stuck during yield? > I've tested, when yield() is running, SeaBIOS seems has not created > some other threads except the main thread. So I don't know what's > the function of yield() here.? The yield() allows hardware interrupts to occur. But note that yield() isn't called in the loop - is is only called after the loop completes. If you are only getting this on massive repetitive reboot requests, there are some other possible explanations: - perhaps the SIPI is getting lost because one of the CPUs is still resetting or still processing a SIPI from the last reboot? - the seabios code itself may have been corrupted if the memcpy() in qemu_prep_reset() got far enough along to clear HaveRunPost, but did not get far enough along to fully complete the memcpy(). If the failure is reproducible, the patch below could help narrow the possibilities. -Kevin --- a/src/fw/smp.c +++ b/src/fw/smp.c @@ -125,6 +125,7 @@ smp_setup(void) // Wait for other CPUs to process the SIPI. u8 cmos_smp_count = rtc_read(CMOS_BIOS_SMP_COUNT) + 1; + dprintf(1, "cmos_smp_count=%d\n", cmos_smp_count); while (cmos_smp_count != CountCPUs) asm volatile( // Release lock and allow other processors to use the stack. @@ -136,6 +137,7 @@ smp_setup(void) " jc 1b\n" : "+m" (SMPLock), "+m" (SMPStack) : : "cc", "memory"); + dprintf(1, "finish smp\n"); yield(); // Restore memory.

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Re: [SeaBIOS] Qemu-kvm VM halt at allocate VGA stack when continuously reset VM
by Kevin O'Connor 01 Dec '15

01 Dec '15

On Sat, Nov 28, 2015 at 07:12:47AM +0000, Xulei (Stone) wrote: > Hi, > Recently, i use a script to continuously reset a VM and > i found my VM frequently halts at "Attempting to allocate > VGA stack via pmm call". After analyzing, i think it may > be a problem of SeaBIOS. > > From the log(attached below), we can see handle_post() > executes twice and this makes the destination address of > "Relocating init" change when the 2nd reset command comes. > This also influences on the source address of "Copying MPTABLE". > At last, the VM will be stuck at attempting to allocate VGA > stack via pmm call. > > Could you offer me a solution to fix this problem? > > ==============bad SeaBIOS log====== > SeaBIOS (version rel-1.8.1-0-g4adadbd-20151127_220019-UVP) > No Xen hypervisor found. > Running on QEMU (i440fx) > Running on KVM > RamSize: 0xc0000000 [cmos] > Now vcpu cpu_id = 0 <<========= i add > Static seabios entry times =1 <<========= i add > Relocating init from 0x000dbb30 to 0xbffad2c0 (size 76928) > Found QEMU fw_cfg > SeaBIOS (version rel-1.8.1-0-g4adadbd-20151127_220019-UVP) <<========= handle_post() execute again? If seabios resets before it sets HaveRunPost then it probably wont work well, as it will rerun the POST code without resetting the global variables it has modified. Unfortunately, it's not clear to me that we can simply move the setting of HaveRunPost to an earlier point, as the handle_resume() code would need to be audited to ensure it can run even if POST hasn't completed. So, it looks like a fix for this will take some further analysis. -Kevin

2 1

[PATCH 0/7] Some TPM code reorganization
by Kevin O'Connor 30 Nov '15

30 Nov '15

Hi Stefan, As part of trying to better understand the TPM code, I found some changes to tcgbios.c were helpful. It's mostly code movement. I've only compile tested these changes, but I think they are safe. I don't want to conflict with any changes you may have pending. So, let me know if this is a problem. The series is on top of your latest patches. (FYI, I made a minor change to a comment in your patch 2.) I've also put this series (and your series) up at: https://github.com/KevinOConnor/seabios/tree/testing -Kevin Kevin O'Connor (7): tpm: Add "static" declaration to functions not used outside tcgbios.c tpm: Move code around in tcgbios.c tpm: Move error recovery from tpm_extend_acpi_log() to only caller tpm: Open code tpm_ipl() into callers tpm: Change tpm_add_measurement() to tpm_add_action() tpm: Move tpm_add_bootdevice() into callers tpm: Move tpm_start_option_rom_scan() and tpm_calling_int19h() into callers src/tcgbios.c | 1258 +++++++++++++++++++++++++-------------------------------- 1 file changed, 556 insertions(+), 702 deletions(-) -- 2.5.0

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Re: [SeaBIOS] SeaBIOS recognising USB 3.0 on boot works - partly
by Kevin O'Connor 30 Nov '15

30 Nov '15

On Mon, Nov 30, 2015 at 04:47:29PM +0000, edward wandasiewicz wrote: > I started over, as I forgot which device was in which port. > > It seem's like a race condition, as I managed to get a USB device > detected twice with JohnLewis RW_LEGACY as well now, although it > doesn't happen very frequently. I pressed Ctrl-L and ESC with not much > pause and got a double device detection. To confirm, the "double device" is an error right - there aren't actually two of these devices in the machine? Looks like two separate issues are occurring - the Philips drive is being detected as both a high speed device and as a super speed device. I need a log with CONFIG_DEBUG_LEVEL=5 to diagnose that. The second issue appears to be a USB_TRANSACTION_ERROR response from the set_address command. I think the controller may just be a bit too picky on stall responses from devices in that situation. I've put up a patch to try and work around that in the repo at: https://github.com/KevinOConnor/seabios/tree/testing Are you able to compile SeaBIOS from source and install it on your Samus? -Kevin

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Re: [SeaBIOS] SeaBIOS recognising USB 3.0 on boot works - partly
by Kevin O'Connor 30 Nov '15

30 Nov '15

On Mon, Nov 30, 2015 at 03:22:38PM +0000, edward wandasiewicz wrote: > Booting with 1 x Phillips USB and 1 x Ventura Ultra attached to the Pixel 2015 > > I've attached the cbmem -c from Pixel Samus, after a cold boot into > Arch Linux and also following a reboot immediately after. > > After a reboot, following a boot, the Philips USB now only appears > just the once, and not twice as on a cold boot. > > I've attached a third cbmem -c, from John Lewis 11.11.15 SeaBIOS > RW_LEGACY for the Pixel Samus. [...] > ********************************** > * J.LEWIS 11.11.15 cold boot > ********************************** > > - same behaviour with JLEWIS on a cold boot and a reboot - no different > > $ cbmem -c > > http://pastebin.com/6XhANLkR Thanks. Can you boot to linux with the USB devices in the same ports as they were for the above boot and post the output from "lsusb -t" and "lsusb -v". Please just directly include or attach the output in your email. (pastebin doesn't work well for those using email archives.) -Kevin

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Re: [SeaBIOS] [PATCH 3/3] tpm: Add a menu for TPM configuration
by Kevin O'Connor 30 Nov '15

30 Nov '15

On Mon, Nov 30, 2015 at 10:23:28AM -0500, Stefan Berger wrote: > "Kevin O'Connor" <kevin(a)koconnor.net> wrote on 11/30/2015 10:05:22 AM: > > Are the above definitions part of the standard, or internal to the > > implementation? If the latter, they should go into tcgbios.[ch] > > These are actually the 'message codes' from the physical presence > interface spec that can be sent from the OS > to the BIOS and on which the BIOS is supposed to act upon reboot. You may > remember the ACPI patches I had for QEMU > where ACPI would write one of the above number into an allocated memory > area for the BIOS to find. I also built > the menu using those 'message codes'. Okay, thanks. > > > +typedef struct { > > > + u8 op; > > > +} tpm_bios_cfg; > > > > What is the purpose of this struct? > > > > This datatype is used to send messages from menu item selections to the > part that processes above 'message codes'. Right, but why does it pass a pointer to the struct instead of just passing the u8 directly? > > > +extern void reset_vector(void) __noreturn; > > > > The code should use reset() (defined in stacks.h). Directly calling > > reset_vector() in 32bit mode isn't strictly correct. > > Ok, will change it. (Worked so far...) It works because it likely causes a machine exception which also ends up in a reboot. So, not as nice. Thanks, -Kevin

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Re: [SeaBIOS] SeaBIOS recognising USB 3.0 on boot works - partly
by Kevin O'Connor 30 Nov '15

30 Nov '15

On Sun, Nov 29, 2015 at 01:40:08AM +0000, edward wandasiewicz wrote: > Running SeaBIOS on a Chromebook Pixel 2015, by default, does not > recognise a plugged in USB 3.0 device attached to a USB 3.0 port or > Type C port. In order for us to investigate an issue, we need to see the debug log. For chromebooks, this is normally obtained by booting a Linux OS from SeaBIOS and running "cbmem -c". It will likely be necessary to download and compile the cbmem utility from the coreboot source code. Once you have the log, please email both a success and failure case to this mail list. There is also some info at: http://www.seabios.org/Debugging -Kevin

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SeaBIOS November 2015