SeaBIOS November 2016

seabios@seabios.org

8 participants
9 discussions

[PATCH 0/3] SeaVGABIOS serial console test
by Kevin O'Connor 05 Sep '17

05 Sep '17

Hi Gerd, I was curious to see what the "sercon" stuff would look like in SeaVGABIOS instead of in SeaBIOS. So, I put together a quick prototype. The code is also at: https://github.com/KevinOConnor/seabios/tree/testing This is just a proof-of-concept thing - I didn't implement any of the useful features you have in your series. Specifically, it doesn't unclutter the serial output, doesn't implement cp437 translations, and doesn't handle multi-byte input. It does does have basic input, output, and split-output handling though. I'm not sure if this is better than a SeaBIOS implementation. I suspect it will be easier to handle vga quirks this way. However, handling exotic serial outputs (eg, mmio and usb based) would be better suited in SeaBIOS. Thoughts? -Kevin Kevin O'Connor (3): sercon: Initial support for VGA emulation over serial port sercon: Add basic keyboard input support sercon: Support "split output" mode Makefile | 2 +- vgasrc/Kconfig | 6 + vgasrc/sercon.c | 356 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ vgasrc/vgabios.c | 15 ++- vgasrc/vgabios.h | 5 + vgasrc/vgaentry.S | 7 ++ vgasrc/vgahw.h | 72 ++++++++++- vgasrc/vgainit.c | 12 +- vgasrc/vgautil.h | 24 ++++ 9 files changed, 482 insertions(+), 17 deletions(-) create mode 100644 vgasrc/sercon.c -- 2.5.5

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[PATCH] tpm: Log TPM 2 digest structure in little endian format
by Stefan Berger 02 Dec '16

02 Dec '16

The parameters for extending the PCRs of a TPM 2 are written in big endian format when sent to the TPM. However, the log needs to be written in little endian format, so we cannot just copy the structure into the log as-is. To support the little endian format in the log, we extend the function writing the TPM 2 digest structure with a parameter that allows us to choose the endianess of a few parameters. We then rewrite the digest structure in little endian format for the log. Signed-off-by: Stefan Berger <stefanb(a)linux.vnet.ibm.com> --- src/tcgbios.c | 25 ++++++++++++++++++------- 1 file changed, 18 insertions(+), 7 deletions(-) diff --git a/src/tcgbios.c b/src/tcgbios.c index 4cff4ce..fea88a6 100644 --- a/src/tcgbios.c +++ b/src/tcgbios.c @@ -311,11 +311,13 @@ tpm20_write_EfiSpecIdEventStruct(void) * * le: the log entry to build the digest in * sha1: the sha1 hash value to use + * bigEndian: whether to build in big endian format for the TPM or + * little endian for the log * * Returns the digest size; -1 on fatal error */ static int -tpm20_build_digest(struct tpm_log_entry *le, const u8 *sha1) +tpm20_build_digest(struct tpm_log_entry *le, const u8 *sha1, int bigEndian) { if (!tpm20_pcr_selection) return -1; @@ -346,7 +348,11 @@ tpm20_build_digest(struct tpm_log_entry *le, const u8 *sha1) return -1; } - v->hashAlg = sel->hashAlg; + if (bigEndian) + v->hashAlg = sel->hashAlg; + else + v->hashAlg = be16_to_cpu(sel->hashAlg); + memset(v->hash, 0, hsize); memcpy(v->hash, sha1, hsize > SHA1_BUFSIZE ? SHA1_BUFSIZE : hsize); @@ -360,7 +366,10 @@ tpm20_build_digest(struct tpm_log_entry *le, const u8 *sha1) } struct tpm2_digest_values *v = (void*)le->hdr.digest; - v->count = cpu_to_be32(count); + if (bigEndian) + v->count = cpu_to_be32(count); + else + v->count = count; return dest - (void*)le->hdr.digest; } @@ -374,13 +383,13 @@ tpm12_build_digest(struct tpm_log_entry *le, const u8 *sha1) } static int -tpm_build_digest(struct tpm_log_entry *le, const u8 *sha1) +tpm_build_digest(struct tpm_log_entry *le, const u8 *sha1, int bigEndian) { switch (TPM_version) { case TPM_VERSION_1_2: return tpm12_build_digest(le, sha1); case TPM_VERSION_2: - return tpm20_build_digest(le, sha1); + return tpm20_build_digest(le, sha1, bigEndian); } return -1; } @@ -709,7 +718,7 @@ tpm_add_measurement_to_log(u32 pcrindex, u32 event_type, .hdr.pcrindex = pcrindex, .hdr.eventtype = event_type, }; - int digest_len = tpm_build_digest(&le, hash); + int digest_len = tpm_build_digest(&le, hash, 1); if (digest_len < 0) return; int ret = tpm_extend(&le, digest_len); @@ -717,6 +726,7 @@ tpm_add_measurement_to_log(u32 pcrindex, u32 event_type, tpm_set_failure(); return; } + tpm_build_digest(&le, hash, 0); tpm_log_event(&le.hdr, digest_len, event, event_length); } @@ -1249,7 +1259,7 @@ hash_log_extend(struct pcpes *pcpes, const void *hashdata, u32 hashdata_length .hdr.pcrindex = pcpes->pcrindex, .hdr.eventtype = pcpes->eventtype, }; - int digest_len = tpm_build_digest(&le, pcpes->digest); + int digest_len = tpm_build_digest(&le, pcpes->digest, 1); if (digest_len < 0) return TCG_GENERAL_ERROR; if (extend) { @@ -1257,6 +1267,7 @@ hash_log_extend(struct pcpes *pcpes, const void *hashdata, u32 hashdata_length if (ret) return TCG_TCG_COMMAND_ERROR; } + tpm_build_digest(&le, pcpes->digest, 0); int ret = tpm_log_event(&le.hdr, digest_len , pcpes->event, pcpes->eventdatasize); if (ret) -- 2.5.5

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[PATCH 0/6] Misc tpm updates
by Kevin O'Connor 02 Dec '16

02 Dec '16

Hi Stefan, I dusted off some TPM patches I had worked on earlier in the year. Mostly just code movement, but the last patch I think helps simplify tpm_build_and_send_cmd(). Do they look okay to you? -Kevin Kevin O'Connor (6): tpm: Add comment banners to tcg.c separating major parts of spec tpm: Don't call tpm_set_failure() from tpm12_get_capability() tpm: Move code around in tcgbios.c to keep like code together acpi: Generalize find_fadt() and find_tcpa_by_rsdp() into find_acpi_table() tpm: Don't call tpm_build_and_send_cmd() from tpm20_stirrandom() tpm: Rework tpm_build_and_send_cmd() into tpm_simple_cmd() src/fw/biostables.c | 18 +- src/std/acpi.h | 7 - src/std/tcg.h | 199 +++++++++-------- src/tcgbios.c | 611 ++++++++++++++++++++++------------------------------ src/util.h | 1 + 5 files changed, 369 insertions(+), 467 deletions(-) -- 2.5.5

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[PATCH for-1.10-stable] drop "etc/boot-cpus" fw_cfg file and reuse legacy QEMU_CFG_NB_CPUS
by Igor Mammedov 21 Nov '16

21 Nov '16

since QEMU_CFG_NB_CPUS not going away anytime soon and serves the same purpose as just added "etc/boot-cpus" fw_cfg drop support for "etc/boot-cpus" while this code is not in use yet (i.e. QEMU with "etc/boot-cpus" hasn't been released) and reuse QEMU_CFG_NB_CPUS instead of it. Signed-off-by: Igor Mammedov <imammedo(a)redhat.com> --- corresponding QEMU part has been posted to qemu-devel [PATCH for-2.8 0/2] pc: remove redundant fw_cfg file "etc/boot-cpus" --- src/fw/paravirt.h | 1 - src/fw/paravirt.c | 37 ++++++------------------------------- src/fw/smp.c | 2 +- 3 files changed, 7 insertions(+), 33 deletions(-) diff --git a/src/fw/paravirt.h b/src/fw/paravirt.h index 6f26fd0..d8eb7c4 100644 --- a/src/fw/paravirt.h +++ b/src/fw/paravirt.h @@ -52,7 +52,6 @@ void qemu_preinit(void); void qemu_platform_setup(void); void qemu_cfg_init(void); -u16 qemu_init_present_cpus_count(void); u16 qemu_get_present_cpus_count(void); #endif diff --git a/src/fw/paravirt.c b/src/fw/paravirt.c index 125066d..a3ea152 100644 --- a/src/fw/paravirt.c +++ b/src/fw/paravirt.c @@ -205,6 +205,7 @@ qemu_platform_setup(void) #define QEMU_CFG_UUID 0x02 #define QEMU_CFG_NUMA 0x0d #define QEMU_CFG_BOOT_MENU 0x0e +#define QEMU_CFG_NB_CPUS 0x05 #define QEMU_CFG_MAX_CPUS 0x0f #define QEMU_CFG_FILE_DIR 0x19 #define QEMU_CFG_ARCH_LOCAL 0x8000 @@ -319,40 +320,14 @@ qemu_romfile_add(char *name, int select, int skip, int size) romfile_add(&qfile->file); } -static int -qemu_romfile_get_fwcfg_entry(char *name, int *select) -{ - struct romfile_s *file = romfile_find(name); - if (!file) - return 0; - struct qemu_romfile_s *qfile; - qfile = container_of(file, struct qemu_romfile_s, file); - if (select) - *select = qfile->select; - return file->size; -} - -static int boot_cpus_sel; -static int boot_cpus_file_sz; - -u16 -qemu_init_present_cpus_count(void) -{ - u16 smp_count = romfile_loadint("etc/boot-cpus", - rtc_read(CMOS_BIOS_SMP_COUNT) + 1); - boot_cpus_file_sz = - qemu_romfile_get_fwcfg_entry("etc/boot-cpus", &boot_cpus_sel); - return smp_count; -} - u16 qemu_get_present_cpus_count(void) { - u16 smp_count; - if (!boot_cpus_file_sz) { - smp_count = rtc_read(CMOS_BIOS_SMP_COUNT) + 1; - } else { - qemu_cfg_read_entry(&smp_count, boot_cpus_sel, boot_cpus_file_sz); + u16 smp_count = 0; + qemu_cfg_read_entry(&smp_count, QEMU_CFG_NB_CPUS, sizeof smp_count); + u16 cmos_cpu_count = rtc_read(CMOS_BIOS_SMP_COUNT) + 1; + if (smp_count < cmos_cpu_count) { + smp_count = cmos_cpu_count; } return smp_count; } diff --git a/src/fw/smp.c b/src/fw/smp.c index bcbad69..46d1da1 100644 --- a/src/fw/smp.c +++ b/src/fw/smp.c @@ -176,7 +176,7 @@ smp_setup(void) return; MaxCountCPUs = romfile_loadint("etc/max-cpus", 0); - u16 smp_count = qemu_init_present_cpus_count(); + u16 smp_count = qemu_get_present_cpus_count(); if (MaxCountCPUs < smp_count) MaxCountCPUs = smp_count; -- 2.7.4

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Patch: Add multiboot-capability to documentation
by Dennis Guse 20 Nov '16

20 Nov '16

Hello, so far the multiboot support is not included in the documentation. This small patch changes docs/Runtime_config.md to include multiboot. I think adding how to use multiboot with Grub would be nice, but this does not seem to fit to the content of Runtime_config.md. Do you have any suggestions where to put it? > This example shows how to start SeaBIOS from Grub2 via multiboot. SeaVGABIOS is passed as a module. ``` set root=(usb0,msdos1) multiboot /bios.elf.bin module /vgabios.bin name=vgaroms/seavgabios.bin boot ``` > Best, --- Dennis Guse

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Re: [SeaBIOS] Starting SEABIOS as Grub payload and NOT loading roms/configuration from CBFS
by Kevin O'Connor 20 Nov '16

20 Nov '16

On Fri, Nov 18, 2016 at 10:48:02AM +0100, Dennis Guse wrote: > I know usually Seabios is loaded by Coreboot and then Seabios loads > its modules from CBFS. > I want to do it slightly different: > * Hardware starts coreboot (actually libreboot flashed to a Lenovo X60) > * Coreboot starts Grub2 > * Grub2 chainloads Seabios from external storage, e.g., USB0: > `chainloader (usb0,msdos1)/bios.bin.elf` > * Seabios starts and loads its roms and configuration NOT from CBFS > > My actual reason for not accessing CBFS is that I want to avoid > flashing the CBFS to hardware for every change of Seabios or its > configuration. > However, I want to have VGA output... The multiboot support should allow one to pass modules from grub2 to SeaBIOS. I've not used multiboot, but this was an example posted in the past: menuentry "SeaBIOS (mb)" --unrestricted { root=ahci0,2 multiboot /bios.bin.elf module /vgabios_x230.rom name=pci8086,0166.rom } > So far, I can chainload Seabios from Grub2 (mostly via USB0). > Then Seabios is accessing the CBFS and automatically loads Grub2 from CBFS. I don't see why SeaBIOS would automatically chainload grub2 unless you asked it to. SeaBIOS only brings in payloads that are stored in the "img/" directory of CBFS - as long as one doesn't put images in that directory, SeaBIOS wont attempt to boot them. > For my case, it would be perfect if the roms (mainly VGA.rom) and > configuration would be compiled into the `bios.bin.elf`. > > I looked into the source and did not find a built in option for this > (I think nobody ever came with such a use case). > What would be a good starting point for me? There's no support for compiling in binaries to SeaBIOS. I'm CC'ing Vladimir as he added the multiboot support. -Kevin

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Starting SEABIOS as Grub payload and NOT loading roms/configuration from CBFS
by Dennis Guse 18 Nov '16

18 Nov '16

Hey, I know usually Seabios is loaded by Coreboot and then Seabios loads its modules from CBFS. I want to do it slightly different: * Hardware starts coreboot (actually libreboot flashed to a Lenovo X60) * Coreboot starts Grub2 * Grub2 chainloads Seabios from external storage, e.g., USB0: `chainloader (usb0,msdos1)/bios.bin.elf` * Seabios starts and loads its roms and configuration NOT from CBFS My actual reason for not accessing CBFS is that I want to avoid flashing the CBFS to hardware for every change of Seabios or its configuration. However, I want to have VGA output... So far, I can chainload Seabios from Grub2 (mostly via USB0). Then Seabios is accessing the CBFS and automatically loads Grub2 from CBFS. For my case, it would be perfect if the roms (mainly VGA.rom) and configuration would be compiled into the `bios.bin.elf`. I looked into the source and did not find a built in option for this (I think nobody ever came with such a use case). What would be a good starting point for me? Best, --- Dennis Guse

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SeaBIOS doesn't boot from secondary hard drive with OS if primary hard drive is empty
by Аладышев Константин 17 Nov '16

17 Nov '16

When I have 2 SATA disks attached to my board, and only second priority device is with OS, SeaBIOS doesn't boot. The "empty" disk doesn't have MBR, so SeaBIOS doesn't stuck on it, it goes to the end message "No bootable device. Retrying in 60 seconds." But if I manually press "ESC" and choose correct disk in interactive promt, system boots successfully. Two logs attached to the message (with and without "ESC" interaction). I use SeaBIOS (d7adf6044a4c772b497e97272adf97426b34a249) as a payload to coreboot.

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Seabios build failure with gcc 6.2.0 in Debian Sid
by Dario Faggioli 06 Nov '16

06 Nov '16

Hi, I'm reporting a build issue that I'm seeing when building Xen's userspace tools, when the build process clones and build Seabios, on Debian Sid, with gcc '6.2.0 20161019 (Debian 6.2.0-9)'. The error looks like this (http://pastebin.com/99cubDZ3): make -C seabios-dir all make[6]: Entering directory '/home/SOURCES/xen/xen.git/tools/firmware/seabios-dir-remote' Compile checking out/src/stacks.o src/stacks.c: Assembler messages: src/stacks.c:567: Error: found `(', expected: `)' src/stacks.c:567: Error: junk `(%ebp))' after expression src/stacks.c:568: Warning: indirect call without `*' Makefile:133: recipe for target 'out/src/stacks.o' failed make[6]: *** [out/src/stacks.o] Error 1 make[6]: Leaving directory '/home/SOURCES/xen/xen.git/tools/firmware/seabios-dir-remote' /home/SOURCES/xen/xen.git/tools/firmware/../../tools/Rules.mk:218: recipe for target 'subdir-all-seabios-dir' failed Seabios folks may be aware of this already, as it looks very similar to this: https://www.mail-archive.com/debian-bugs-dist@lists.debian.org/msg1463516.h… And even more to this: https://lists.debian.org/debian-gcc/2016/10/msg00147.html A colleague of mine (Cc-ed) said in chat that gcc 6.2.1 (don't know on what distro) seems to build all fine. Regards, Dario -- <<This happens because I choose it to happen!>> (Raistlin Majere) ----------------------------------------------------------------- Dario Faggioli, Ph.D, http://about.me/dario.faggioli Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK)

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SeaBIOS November 2016