On 3/25/21 8:24 AM, Brijesh Singh wrote:
> On 3/25/21 9:48 AM, Dave Hansen wrote:
>> On 3/24/21 10:04 AM, Brijesh Singh wrote:
>>> When SEV-SNP is enabled globally in the system, a write from the hypervisor
>>> can raise an RMP violation. We can resolve the RMP violation by splitting
>>> the virtua
On 3/25/21 9:48 AM, Dave Hansen wrote:
> On 3/24/21 10:04 AM, Brijesh Singh wrote:
>> When SEV-SNP is enabled globally in the system, a write from the hypervisor
>> can raise an RMP violation. We can resolve the RMP violation by splitting
>> the virtual address to a lower page level.
>>
>> e.g
>>
On 3/24/21 10:04 AM, Brijesh Singh wrote:
> When SEV-SNP is enabled globally in the system, a write from the hypervisor
> can raise an RMP violation. We can resolve the RMP violation by splitting
> the virtual address to a lower page level.
>
> e.g
> - guest made a page shared in the RMP entry so
On 3/24/21 10:04 AM, Brijesh Singh wrote:
> @@ -1377,6 +1442,22 @@ void do_user_addr_fault(struct pt_regs *regs,
> if (hw_error_code & X86_PF_INSTR)
> flags |= FAULT_FLAG_INSTRUCTION;
>
> + /*
> + * If its an RMP violation, see if we can resolve it.
> + */
> +
When SEV-SNP is enabled globally in the system, a write from the hypervisor
can raise an RMP violation. We can resolve the RMP violation by splitting
the virtual address to a lower page level.
e.g
- guest made a page shared in the RMP entry so that the hypervisor
can write to it.
- the hyperviso
