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* [PATCH RFC/RFT 0/3] efi/libstub: arm32: Remove dependency on dram_base
@ 2020-09-09 15:16 Ard Biesheuvel
  2020-09-09 15:16 ` [PATCH RFC/RFT 1/3] efi/libstub: Export efi_low_alloc_above() to other units Ard Biesheuvel
                   ` (4 more replies)
  0 siblings, 5 replies; 20+ messages in thread
From: Ard Biesheuvel @ 2020-09-09 15:16 UTC (permalink / raw)
  To: linux-efi
  Cc: Etienne CARRIERE, Francois Ozog, Maxim Uvarov, Rouven Czerwinski,
	Takahiro Akashi, Heinrich Schuchardt, Ilias Apalodimas,
	Patrice CHOTARD, Patrick DELAUNAY, Jens Wiklander, Atish Patra,
	Grant Likely, Palmer Dabbelt, Christophe Priouzeau,
	Ard Biesheuvel, linux-arm-kernel, Sumit Garg

Maxim reports boot failures on platforms that describe reserved memory
regions in DT that are disjoint from system DRAM, and which are converted
to EfiReservedMemory regions by the EFI subsystem in u-boot.

As it turns out, the whole notion of discovering the base of DRAM is
problematic, and it would be better to simply rely on the EFI memory
allocation routines instead, and derive the FDT and initrd allocation
limits from the actual placement of the kernel (which is what defines
the start of the linear region anyway)

Finally, we should be able to get rid of get_dram_base() entirely.
However, as RISC-V only just started using it, we will need to address
that at a later time.

Cc: Maxim Uvarov <maxim.uvarov@linaro.org>
Cc: Heinrich Schuchardt <xypron.glpk@gmx.de>
Cc: Atish Patra <atish.patra@wdc.com>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Jens Wiklander <jens.wiklander@linaro.org>
Cc: Francois Ozog <francois.ozog@linaro.org>
Cc: Etienne CARRIERE <etienne.carriere@st.com>
Cc: Takahiro Akashi <takahiro.akashi@linaro.org>
Cc: Patrice CHOTARD <patrice.chotard@st.com>
Cc: Sumit Garg <sumit.garg@linaro.org>
Cc: Grant Likely <Grant.Likely@arm.com>
Cc: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Cc: Christophe Priouzeau <christophe.priouzeau@linaro.org>
Cc: Rouven Czerwinski <r.czerwinski@pengutronix.de>
Cc: Patrick DELAUNAY <patrick.delaunay@st.com>

Ard Biesheuvel (3):
  efi/libstub: Export efi_low_alloc_above() to other units
  efi/libstub: Use low allocation for the uncompressed kernel
  efi/libstub: base FDT and initrd placement on image address not DRAM
    base

 arch/arm/include/asm/efi.h                |   6 +-
 arch/arm64/include/asm/efi.h              |   2 +-
 drivers/firmware/efi/libstub/arm32-stub.c | 177 ++++----------------
 drivers/firmware/efi/libstub/efi-stub.c   |   2 +-
 drivers/firmware/efi/libstub/efistub.h    |   3 +
 drivers/firmware/efi/libstub/relocate.c   |   4 +-
 6 files changed, 47 insertions(+), 147 deletions(-)

-- 
2.17.1


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^ permalink raw reply	[flat|nested] 20+ messages in thread

end of thread, other threads:[~2020-09-16 22:03 UTC | newest]

Thread overview: 20+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-09-09 15:16 [PATCH RFC/RFT 0/3] efi/libstub: arm32: Remove dependency on dram_base Ard Biesheuvel
2020-09-09 15:16 ` [PATCH RFC/RFT 1/3] efi/libstub: Export efi_low_alloc_above() to other units Ard Biesheuvel
2020-09-09 15:16 ` [PATCH RFC/RFT 2/3] efi/libstub: Use low allocation for the uncompressed kernel Ard Biesheuvel
2020-09-09 15:16 ` [PATCH RFC/RFT 3/3] efi/libstub: base FDT and initrd placement on image address not DRAM base Ard Biesheuvel
2020-09-09 15:25 ` [PATCH RFC/RFT 0/3] efi/libstub: arm32: Remove dependency on dram_base Grant Likely
2020-09-09 15:30   ` Ard Biesheuvel
2020-09-09 20:52 ` Palmer Dabbelt
2020-09-09 21:44   ` Atish Patra
2020-09-10  1:34     ` Atish Patra
2020-09-10 10:04       ` Ard Biesheuvel
2020-09-10 14:08         ` Ard Biesheuvel
2020-09-10 23:32           ` Atish Patra
2020-09-11  2:16           ` Palmer Dabbelt
2020-09-11  7:56             ` Ard Biesheuvel
2020-09-11 10:27               ` Maxim Uvarov
2020-09-11 18:45                 ` Ard Biesheuvel
2020-09-16 15:43                   ` Maxim Uvarov
2020-09-16 15:58                     ` Ard Biesheuvel
2020-09-16 16:02               ` Ard Biesheuvel
2020-09-16 22:01                 ` Atish Patra

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