On Mon, Aug 31, 2020 at 07:09:37PM +0200, Borislav Petkov wrote:
> On Mon, Aug 24, 2020 at 10:55:04AM +0200, Joerg Roedel wrote:
> > + /* Check if AP Jump Table is non-zero and page-aligned */
> > + if (!jump_table_addr || jump_table_addr & ~PAGE_MASK)
> > + return 0;
>
> I think
On Mon, Aug 24, 2020 at 10:55:04AM +0200, Joerg Roedel wrote:
> diff --git a/arch/x86/include/uapi/asm/svm.h b/arch/x86/include/uapi/asm/svm.h
> index 8f36ae021a7f..a19ce9681ec2 100644
> --- a/arch/x86/include/uapi/asm/svm.h
> +++ b/arch/x86/include/uapi/asm/svm.h
> @@ -84,6 +84,9 @@
> /* SEV-ES
From: Tom Lendacky
As part of the GHCB specification, the booting of APs under SEV-ES
requires an AP jump table when transitioning from one layer of code to
another (e.g. when going from UEFI to the OS). As a result, each layer
that parks an AP must provide the physical address of an AP jump
