On 4/9/21 11:53 AM, Borislav Petkov wrote:
> On Wed, Mar 24, 2021 at 11:44:22AM -0500, Brijesh Singh wrote:
>> +/*
>> + * The ROM memory is not part of the E820 system RAM and is not
>> prevalidated by the BIOS.
>> + * The kernel page table maps the ROM region as encrypted memory,
On Wed, Mar 24, 2021 at 11:44:22AM -0500, Brijesh Singh wrote:
> + /*
> + * The ROM memory is not part of the E820 system RAM and is not
> prevalidated by the BIOS.
> + * The kernel page table maps the ROM region as encrypted memory, the
> SEV-SNP requires
> + * the all the
The probe_roms() access the memory range (0xc - 0x1) to probe
various ROMs. The memory range is not part of the E820 system RAM
range. The memory range is mapped as private (i.e encrypted) in page
table.
When SEV-SNP is active, all the private memory must be validated before
the access.
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