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

Dave Hansen
2021-07-07T16:14:36Z

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.