Re: [Resend RFC PATCH V4 13/13] x86/HV: Not set memory decrypted/encrypted during kexec alloc/free page in IVM

[Dave Hansen]

On 7/7/21 8:46 AM, Tianyu Lan wrote:
> @@ -598,7 +599,7 @@ void arch_kexec_unprotect_crashkres(void)
>   */
>  int arch_kexec_post_alloc_pages(void *vaddr, unsigned int pages, gfp_t gfp)
>  {
> -	if (sev_active())
> +	if (sev_active() || hv_is_isolation_supported())
>  		return 0;
>  
>  	/*
> @@ -611,7 +612,7 @@ int arch_kexec_post_alloc_pages(void *vaddr, unsigned int pages, gfp_t gfp)
>  
>  void arch_kexec_pre_free_pages(void *vaddr, unsigned int pages)
>  {
> -	if (sev_active())
> +	if (sev_active() || hv_is_isolation_supported())
>  		return;

You might want to take a look through the "protected guest" patches.  I
think this series is touching a few of the same locations that TDX and
recent SEV work touch.

https://lore.kernel.org/lkml/20210618225755.662725-5-sathyanarayanan.kuppuswamy@xxxxxxxxxxxxxxx/