Add detailed SMBIOS information as following:
1. Missing fields in Type smaeul#3 and smaeul#4
2. Type smaeul#7

Add support to dynamic length of contained object handles and
elements.

As SMBIOS is a fundamental feature which is enabled for all
boards, in order to avoid increasing rom size, all detailed SMBIOS
information is under kconfig GENERATE_SMBIOS_TABLE_VERBOSE.
Board maintainers can determine whether to select this feature.

Signed-off-by: Raymond Mao <[email protected]>

Raymond Mao <[email protected]> says:

Motivations for changes:
Current SMBIOS library and command-line tool is not fully matching with
the requirements:
1. Missing support for other mandatory types (smaeul#7, u-boot#9, u-boot#16, u-boot#17, u-boot#19).
2. Only a few platforms support SMBIOS node from the device tree.
3. Values of some fields are hardcoded in the library other than fetching
   from the device hardware.
4. Embedded data with dynamic length is not supported (E.g. Contained
   Object Handles in Type smaeul#2 and Contained Elements in Type smaeul#3)

Changes:
1. Refactor the SMBIOS library and command-line tool to better align with
   the SMBIOS spec.
2. Create an arch-specific driver for all aarch64-based platforms to fetch
   SMBIOS private data from the device hardware (processor and cache).
3. Create a sysinfo driver to poppulate platform SMBIOS private data.
4. Add generic SMBIOS DTS file for arm64 platforms for those common strings
   and values which cannot be retrieved from the system registers.
   Vendors can create their own SMBIOS node using this as an example.
   For those boards without SMBIOS nodes, this DTS file can be included to
   have a generic SMBIOS information of the system.
5. Add support for Type smaeul#7 (Cache Information) and link its handles to
   Type smaeul#4.
6. To minimize size-growth for those platforms which have not sufficient
   ROM spaces or the platforms which don't need detailed SMBIOS
   information, new added fields are only being built when kconfig
   GENERATE_SMBIOS_TABLE_VERBOSE is selected.

Once this patch is acceptted, subsequent patch sets will add other missing
types (u-boot#9, u-boot#16, u-boot#17, u-boot#19).

Tests:
To test this with QEMU arm64, please follow the guide on dt_qemu.rst to
get a merged DT to run with.
```
qemu-system-aarch64 -machine virt -machine dumpdtb=qemu.dtb
cat  <(dtc -I dtb qemu.dtb) <(dtc -I dtb ./dts/dt.dtb | grep -v /dts-v1/) \
  | dtc - -o merged.dtb
qemu-system-aarch64 -machine virt -nographic -bios u-boot.bin \
  -dtb merged.dtb
```

Link: https://lore.kernel.org/r/[email protected]

commit 2e2c2a5 ("arm: qemu: override flash accessors to use virtualizable instructions")
explains why we can't have instructions with multiple output registers
when running under QEMU + KVM and the instruction leads to an exception
to the hypervisor.

USB XHCI is such a case (MMIO) where a ldr w1, [x0], smaeul#4 is emitted for
xhci_start() which works fine with QEMU but crashes for QEMU + KVM.

These instructions cannot be emulated by KVM as they do not produce
syndrome information data that KVM can use to infer the destination
register, the faulting address, whether it was a load or store, or
if it's a 32 or 64 bit general-purpose register.
As a result an external abort is injected from QEMU, via ext_dabt_pending
to KVM and we end up throwing an exception that looks like

 U-Boot 2025.07-rc4 (Jun 10 2025 - 12:00:15 +0000)
 [...]
 Register 8001040 NbrPorts 8
 Starting the controller
 "Synchronous Abort" handler, esr 0x96000010, far 0x10100040
 elr: 000000000005b1c8 lr : 000000000005b1ac (reloc)
 elr: 00000000476fc1c8 lr : 00000000476fc1ac
 x0 : 0000000010100040 x1 : 0000000000000001
 x2 : 0000000000000000 x3 : 0000000000003e80
 x4 : 0000000000000000 x5 : 00000000477a5694
 x6 : 0000000000000038 x7 : 000000004666f360
 x8 : 0000000000000000 x9 : 00000000ffffffd8
 x10: 000000000000000d x11: 0000000000000006
 x12: 0000000046560a78 x13: 0000000046560dd0
 x14: 00000000ffffffff x15: 000000004666eed2
 x16: 00000000476ee2f0 x17: 0000000000000000
 x18: 0000000046660dd0 x19: 000000004666f480
 x20: 0000000000000000 x21: 0000000010100040
 x22: 0000000010100000 x23: 0000000000000000
 x24: 0000000000000000 x25: 0000000000000000
 x26: 0000000000000000 x27: 0000000000000000
 x28: 0000000000000000 x29: 000000004666f360

 Code: d5033fbf aa1503e0 5287d003 52800002 (b8004401)
 Resetting CPU ...

There are two problems making this the default.
- It will emit ldr + add or str + add instead of ldr/str(post increment)
  in somne cases
- Some platforms that depend on TPL/SPL grow in size enough so that the
  binary doesn't fit anymore.

So let's add proper I/O accessors add a Kconfig option
to turn it off by default apart from our QEMU builds.

Reported-by: Mikko Rapeli <[email protected]>
Tested-by: Mikko Rapeli <[email protected]>
Signed-off-by: Ilias Apalodimas <[email protected]>