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2020-08-14arch/x86/postcar: Add x86_64 supportPatrick Rudolph
* Add support for loading GDT on x86_64. * Add x86_64 assembly code to do the same as the x86_32 code. * Separate x86_32 and x86_64 code. Tested on qemu x86_32 and x86_64 using additional MTRRs. Tested on Lenovo T410 with additional x86_64 patches. Change-Id: I1c190627f5f0ed6f82738cb99423892382899d7b Signed-off-by: Patrick Rudolph <siro@das-labor.org> Reviewed-on: https://review.coreboot.org/c/coreboot/+/30500 Reviewed-by: Arthur Heymans <arthur@aheymans.xyz> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2020-07-08cpu/x86/smm: Add support for long modePatrick Rudolph
Enable long mode in SMM handler. x86_32 isn't affected by this change. As the rsm instruction used to leave SMM doesn't restore MSR registers, drop back to protected mode after running the smi_handler and restore IA32_EFER MSR (which enables long mode support) to previous value. NOTE: This commit does NOT introduce a new security model. It uses the same page tables as the remaining firmware does. This can be a security risk if someone is able to manipulate the page tables stored in ROM at runtime. USE FOR TESTING ONLY! Tested on Qemu Q35. Change-Id: I8bba4af4688c723fc079ae905dac95f57ea956f8 Signed-off-by: Patrick Rudolph <siro@das-labor.org> Reviewed-on: https://review.coreboot.org/c/coreboot/+/35681 Reviewed-by: Raul Rangel <rrangel@chromium.org> Reviewed-by: Angel Pons <th3fanbus@gmail.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2020-07-08Documentation: Add TODOs for secure SMM when using x86_64Patrick Rudolph
Change-Id: I157238f18bc1c2eba0adc0b87caa9adaf3fc5d38 Signed-off-by: Patrick Rudolph <siro@das-labor.org> Reviewed-on: https://review.coreboot.org/c/coreboot/+/42982 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-by: Raul Rangel <rrangel@chromium.org>
2020-07-05arch/x86: Support x86_64 exceptionsPaul Menzel
* Doesn't affect existing x86_32 code. Tested on qemu using division by zero. Tested on Lenovo T410 with additional x86_64 patches. Change-Id: Idd12c90a95cc2989eb9b2a718740a84222193f48 Signed-off-by: Patrick Rudolph <siro@das-labor.org> Reviewed-on: https://review.coreboot.org/c/coreboot/+/30117 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Raul Rangel <rrangel@chromium.org>
2019-11-10arch/riscv: Pass cbmem_top to ramstage via calling argumentArthur Heymans
Tested on the Qemu-Virt target both 32 and 64 bit. Change-Id: I5c74cd5d3ee292931c5bbd2e4075f88381429f72 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/c/coreboot/+/36558 Reviewed-by: Nico Huber <nico.h@gmx.de> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2019-11-04cpu/qemu-x86: Add x86_64 bootblock supportPatrick Rudolph
Add support for x86_64 bootblock on qemu. Introduce a new approach to long mode support. The previous patch set generated page tables at runtime and placed them in heap. The new approach places the page tables in memory mapped ROM. Introduce a new tool called pgtblgen that creates x86 long mode compatible page tables and writes those to a file. The file is included into the CBFS and placed at a predefined offset. Add assembly code to load the page tables, based on a Kconfig symbol and enter long in bootblock. The code can be easily ported to real hardware bootblock. Tested on qemu q35. Change-Id: Iec92c6cea464c97c18a0811e2e91bc22133ace42 Signed-off-by: Patrick Rudolph <siro@das-labor.org> Reviewed-on: https://review.coreboot.org/c/coreboot/+/35680 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2019-08-06Documentation: Advertise support for OpenSBIPatrick Rudolph
Change-Id: Ie990bb95fcdcfab0246e8c694704022d9b8b5195 Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/34690 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-by: Philipp Hug <philipp@hug.cx> Reviewed-by: Xiang Wang <merle@hardenedlinux.org>
2019-07-02cpu/x86/pae/pgtbl: Add memset with PAEPatrick Rudolph
To clear all DRAM on x86_32, add a new method that uses PAE to access more than 32bit of address space. Add Documentation as well. Required for clearing all system memory as part of security API. Tested on wedge100s: Takes less than 2 seconds to clear 8GiB of DRAM. Tested on P8H61M-Pro: Takes less than 1 second to clear 4GiB of DRAM. Change-Id: I00f7ecf87b5c9227a9d58a0b61eecc38007e1a57 Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/31549 Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2019-06-21Documentatioan: update stage handoff protocolXiang Wang
Change-Id: I170fc16675c2701f6ea133cfce6e5fabdfb0e8d3 Signed-off-by: Xiang Wang <wxjstz@126.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/33460 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Patrick Rudolph <siro@das-labor.org> Reviewed-by: Philipp Hug <philipp@hug.cx>
2018-12-19Documentation: Add arch x86Patrick Rudolph
Describe state and assuptions made about x86_64 support. Change-Id: I308a09b0eac269afd30df95ed3ea195238a6cfbe Signed-off-by: Patrick Rudolph <siro@das-labor.org> Reviewed-on: https://review.coreboot.org/c/30056 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Patrick Georgi <pgeorgi@google.com>
2018-10-30Documentation/riscv: Improve `index.md`Paul Menzel
1. Add dot/period to the end of sentences 2. Remove blank line at the end of the file 3. Break lines after 75 characters 4. Use RISC-V spelling 5. Add comma for clarity Change-Id: Icbe803dfbe92ca7850204a1a9f7175befe9c8bcf Signed-off-by: Paul Menzel <pmenzel@molgen.mpg.de> Reviewed-on: https://review.coreboot.org/28654 Reviewed-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-by: Philipp Hug <philipp@hug.cx> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2018-10-11Documentation: Add and link the arch directoryJonathan Neuschäfer
Fixes: b159d5ba8f ("riscv: add documentation for stages and payloads") Change-Id: I5ca8ed094c9b6d115da707375205872e782a66b2 Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-on: https://review.coreboot.org/28991 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Martin Roth <martinroth@google.com>
2018-09-15riscv: add documentation for stages and payloadsRonald G. Minnich
Change-Id: Iff522e309e9cf9a31c1c79c24047d83d7fd0b00a Signed-off-by: Ronald G. Minnich <rminnich@gmail.com> Reviewed-on: https://review.coreboot.org/28619 Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
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