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Enable the dmi driver for riscv which would allow access the
SMBIOS info through some userspace file(/sys/firmware/dmi/*).
The change was based on that of arm64 and has been verified
by dmidecode tool.
Signed-off-by: Haibo Xu <[email protected]>
Reviewed-by: Ard Biesheuvel <[email protected]>
Reviewed-by: Atish Patra <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Palmer Dabbelt <[email protected]>
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md_size will have been narrowed if we have >= 4GB worth of pages in a
soft-reserved region.
Signed-off-by: Andrew Bresticker <[email protected]>
Signed-off-by: Ard Biesheuvel <[email protected]>
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Only the arch_efi_call_virt() macro that some architectures override
needs to be a macro, given that it is variadic and encapsulates calls
via function pointers that have different prototypes.
The associated setup and teardown code are not special in this regard,
and don't need to be instantiated at each call site. So turn them into
ordinary C functions and move them out of line.
Cc: Paul Walmsley <[email protected]>
Cc: Palmer Dabbelt <[email protected]>
Cc: Albert Ou <[email protected]>
Signed-off-by: Ard Biesheuvel <[email protected]>
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The generic EFI stub can be instructed to avoid SetVirtualAddressMap(),
and simply run with the firmware's 1:1 mapping. In this case, it
populates the virtual address fields of the runtime regions in the
memory map with the physical address of each region, so that the mapping
code has to be none the wiser. Only if SetVirtualAddressMap() fails, the
virtual addresses are wiped and the kernel code knows that the regions
cannot be mapped.
However, wiping amounts to setting it to zero, and if a runtime region
happens to live at physical address 0, its valid 1:1 mapped virtual
address could be mistaken for a wiped field, resulting on loss of access
to the EFI services at runtime.
So let's only assume that VA == 0 means 'no runtime services' if the
region in question does not live at PA 0x0.
Signed-off-by: Ard Biesheuvel <[email protected]>
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This patch adds EFI runtime service support for RISC-V.
Signed-off-by: Atish Patra <[email protected]>
[ardb: - Remove the page check]
Signed-off-by: Ard Biesheuvel <[email protected]>
Acked-by: Ard Biesheuvel <[email protected]>
Signed-off-by: Palmer Dabbelt <[email protected]>
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