Re: [BUG] Fault during memory acceptance for TDX VMs with certain memory sizes

[Moritz Sanft]

> Any chance you can throw
> a bunch of printk()'s in the kernel and see what all the fields in here are:
>
> struct efi_unaccepted_memory {
>         u32 version;
>         u32 unit_size;
>         u64 phys_base;
>         u64 size;
>         unsigned long bitmap[];
> };
>
> Along with the address of bitmap[] and all the calls to: bitmap_clear()?

Thanks for the guidance. I've added this logging via the patch in [1], 
which produced the following output:

```
[    0.033292] accept_memory(start=0x0000000000099000 size=0x6000)
[    0.037860]   unaccepted: version=1 unit_size=2097152 
phys_base=0x100000000 size=0xfdc bitmap=ff1100007d624030
[    0.041469] Using GB pages for direct mapping
[    0.043090] accept_memory(start=0x00000010db600000 size=0x200000)
[    0.045311]   unaccepted: version=1 unit_size=2097152 
phys_base=0x100000000 size=0xfdc bitmap=ff1100007d624030
[    0.058123]   bitmap_clear(bitmap=ff1100007d624030, start=32475, len=1)
[    0.060921] accept_memory(start=0x00000010db7ff000 size=0x1000)
[    0.063142]   unaccepted: version=1 unit_size=2097152 
phys_base=0x100000000 size=0xfdc bitmap=ff1100007d624030
[    0.066865] accept_memory(start=0x00000010db7fe000 size=0x1000)
[    0.069096]   unaccepted: version=1 unit_size=2097152 
phys_base=0x100000000 size=0xfdc bitmap=ff1100007d624030
[    0.073705] accept_memory(start=0x00000010db7fd000 size=0x1000)
[    0.075908]   unaccepted: version=1 unit_size=2097152 
phys_base=0x100000000 size=0xfdc bitmap=ff1100007d624030
// unrelated logs omitted here
[    0.134988] accept_memory(start=0x00000010db7fcf40 size=0x83)
[    0.137152]   unaccepted: version=1 unit_size=2097152 
phys_base=0x100000000 size=0xfdc bitmap=ff1100007d624030
[    0.140828] BUG: unable to handle page fault for address: 
ff1100007d625008
```

Find a full log attached in [2].

Please let me know if we need to gather any further logs - we're happy 
to do so.

Best Regards,
Moritz Sanft

[1]: https://gist.github.com/msanft/13709e1ec9976a1b4b2723b98163a04b
[2]: https://gist.github.com/msanft/d102475bb28baa4b7958ed35e001e962