On Fri, Mar 20, 2020 at 03:26:09PM -0700, Dave Hansen wrote:
> In any case, I thought this all came through initialize_identity_maps(),
> which does, for instance:
>
> mapping_info.page_flag = __PAGE_KERNEL_LARGE_EXEC | sme_me_mask;
>
> Where:
>
> #define __PAGE_KERNEL_LARGE_EXEC
On 3/20/20 3:12 PM, Joerg Roedel wrote:
> On Fri, Mar 20, 2020 at 02:02:13PM -0700, Dave Hansen wrote:
>> It *never* flushes global pages. For a generic function like this, that
>> seems pretty dangerous because the PTEs it goes after could quite easily
>> be Global. It's also not _obviously_
On Fri, Mar 20, 2020 at 02:02:13PM -0700, Dave Hansen wrote:
> It *never* flushes global pages. For a generic function like this, that
> seems pretty dangerous because the PTEs it goes after could quite easily
> be Global. It's also not _obviously_ correct if PCIDs are in play
> (which I don't
On 3/20/20 1:53 PM, David Rientjes wrote:
>> +
>> +/* Clear encryption flag and write new pte */
>> +pte = pte_clear_flags(*ptep, _PAGE_ENC);
>> +set_pte(ptep, pte);
>> +
>> +/* Flush TLB to map the page unencrypted */
>> +write_cr3(top_level_pgt);
>> +
> Is there a guarantee
On Thu, 19 Mar 2020, Joerg Roedel wrote:
> From: Joerg Roedel
>
> This function is needed to map the GHCB for SEV-ES guests. The GHCB is
> used for communication with the hypervisor, so its content must not be
> encrypted.
>
> Signed-off-by: Joerg Roedel
> ---
>
From: Joerg Roedel
This function is needed to map the GHCB for SEV-ES guests. The GHCB is
used for communication with the hypervisor, so its content must not be
encrypted.
Signed-off-by: Joerg Roedel
---
arch/x86/boot/compressed/ident_map_64.c | 125
