From: Sai Praneeth
Use helper function (efi_switch_mm()) to switch to/from efi_mm. We
switch to efi_mm before calling
1. efi_set_virtual_address_map() and
2. Invoking any efi_runtime_service()
Likewise, we need to switch back to previous mm (mm context stolen by
efi_mm) after the above calls ret
From: Sai Praneeth
Presently, only ARM uses mm_struct to manage efi page tables and efi
runtime region mappings. As this is the preferred approach, let's make
this data structure common across architectures. Specially, for
x86, using this data structure improves code maintainability and
readabili
From: Sai Praneeth
Since the previous patch added support for efi_mm, let's handle efi_pgd
through efi_mm and remove global variable efi_pgd.
Signed-off-by: Sai Praneeth Prakhya
Cc: Lee, Chun-Yi
Cc: Borislav Petkov
Cc: Tony Luck
Cc: Andy Lutomirski
Cc: Michael S. Tsirkin
Cc: Ricardo Neri
From: Sai Praneeth
Presently, in x86, to invoke any efi function like
efi_set_virtual_address_map() or any efi_runtime_service() the code path
typically involves read_cr3() (save previous pgd), write_cr3()
(write efi_pgd) and calling efi function. Likewise after returning from
efi function the co
Hi Boris,
On 8/28/17 5:51 AM, Borislav Petkov wrote:
[..]
> +static int __init early_set_memory_enc_dec(resource_size_t paddr,
>> + unsigned long size, bool enc)
>> +{
>> +unsigned long vaddr, vaddr_end, vaddr_next;
>> +unsigned long psize, pmask;
>
On Mon, Jul 24, 2017 at 02:07:55PM -0500, Brijesh Singh wrote:
> Some KVM-specific custom MSRs shares the guest physical address with
s/shares/share/
> hypervisor.
"the hypervisor."
> When SEV is active, the shared physical address must be mapped
> with encryption attribute cleared so that both
