Re: [PATCH Part2 v6 09/49] x86/fault: Add support to handle the RMP fault for user address

Jarkko Sakkinen
2022-07-12T11:58:28Z

On Mon, Jun 20, 2022 at 11:03:43PM +0000, Ashish Kalra wrote:
> +/*
> + * Return 1 if the caller need to retry, 0 if it the address need to be split
> + * in order to resolve the fault.
> + */
> +static int handle_user_rmp_page_fault(struct pt_regs *regs, unsigned long error_code,
> + unsigned long address)
> +{
> + int rmp_level, level;
> + pte_t *pte;
> + u64 pfn;
> +
> + pte = lookup_address_in_mm(current->mm, address, &level);

As discussed in [1], the lookup should be done in kvm->mm, along the
lines of host_pfn_mapping_level().

[1] https://lore.kernel.org/kvm/YmwIi3bXr%2F1yhYV%2F@google.com/
|
BR, Jarkko