Add SMBIOS OEM Strings support (aarch64 only) #187
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This edk2 firmware will search for the SMBIOS data in address 0x4000_F000. Signed-off-by: German Maglione <gmaglione@redhat.com>
This crate will build and write in memory all the required tables for SMBIOS. It build tables type 0, 1 and 11 if provided. It's not SMBIOS compliant, since it only set 2 of the 10 required tables. It also doesn't set the UUID in type 1 table (i.e., system information), that is not clear it's required in the spec (QEMU set a 0 UUID if not provided). The type 0 characteristics bits follow the example in QEMU and EDK2 Signed-off-by: German Maglione <gmaglione@redhat.com>
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|
The EDK2 firmware was created using slp/edk2#1 |
include/libkrun.h
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| * Returns: | ||
| * Zero on success or a negative error number on failure. | ||
| */ | ||
| int32_t krun_set_smbios_oem_strings(uint32_t ctx_id, const char *const oem_strings[], char count); |
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It's a bit weird passing count as char. And, while I agree this strategy is better than using from_raw_parts with MAX_ARGS, please use it and drop count for consistency with other functions in the API. We'll change all of them at once in v2.0.
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Ok, should I explicitly ask for a NULL ptr terminator of the array?, like:
/**
* Sets the SMBIOS OEM Strings.
*
* Arguments:
* "ctx_id" - the configuration context ID.
* "oem_strings" - an array of string pointers. Is terminated with an additional NULL pointer.
*
* Returns:
* Zero on success or a negative error number on failure.
*/
int32_t krun_set_smbios_oem_strings(uint32_t ctx_id, const char *const oem_strings[]);
I used char (btw it should be unsigned char) because the SMBIOS use a u8 to define the number of strings, and I think it's better to have these restriction in the type system than as a runtime check.
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I just tested it more, and I got a segfault, we need to explicitly ask for a NULL terminator (but the from_raw_part is still UB)
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I just realized that inttypes.h is included... instead of unsigned char I could have use uint8_t
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Add a new API `krun_set_smbios_oem_strings()` to set SMBIOS OEM Strings (type 11), and all the internal machinery to provide them to the firmware. The EDK2 firmware expect the SMBIOS tables on address 0x4000_F000. Currently, this is only supported on aarch64 architectures. Signed-off-by: German Maglione <gmaglione@redhat.com>
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This PR adds support for SMBIOS, specifically to be able to set
SMBIOS OEM Strings. The main use case is to pass credentials to
systemd[0], this is a requirement to support krunkit on podman-bootc[1].
It adds a new API
krun_set_smbios_oem_strings()to set SMBIOS OEMStrings (type 11), and all the internal machinery to provide them to
the firmware. The included EDK2 firmware expects the SMBIOS tables on
address 0x4000_F000. This is only supported on aarch64 architectures.
[0] https://systemd.io/CREDENTIALS/
[1] https://github.com/containers/podman-bootc/