> From: Andrew Cooper
> Sent: Monday, April 20, 2020 10:59 PM
>
> This will cause all SYSCALL/SYSRET instructions to suffer #UD rather than
> following the MSR_{L,C}STAR pointers, allowing us to drop the star_enter()
> panic helper, allowing us to clean up the IST stacks in a subsequent patch.
>
On 20.04.2020 16:59, Andrew Cooper wrote:
> --- a/xen/arch/x86/efi/efi-boot.h
> +++ b/xen/arch/x86/efi/efi-boot.h
> @@ -238,7 +238,8 @@ static void __init noreturn efi_arch_post_exit_boot(void)
> /* Set system registers and transfer control. */
> asm volatile("pushq $0\n\tpopfq");
>
