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Re: [Resend RFC PATCH V4 13/13] x86/HV: Not set memory decrypted/encrypted during kexec alloc/free page in IVM
- To: Tianyu Lan <ltykernel@xxxxxxxxx>, kys@xxxxxxxxxxxxx, haiyangz@xxxxxxxxxxxxx, sthemmin@xxxxxxxxxxxxx, wei.liu@xxxxxxxxxx, decui@xxxxxxxxxxxxx, tglx@xxxxxxxxxxxxx, mingo@xxxxxxxxxx, bp@xxxxxxxxx, x86@xxxxxxxxxx, hpa@xxxxxxxxx, dave.hansen@xxxxxxxxxxxxxxx, luto@xxxxxxxxxx, peterz@xxxxxxxxxxxxx, konrad.wilk@xxxxxxxxxx, boris.ostrovsky@xxxxxxxxxx, jgross@xxxxxxxx, sstabellini@xxxxxxxxxx, joro@xxxxxxxxxx, will@xxxxxxxxxx, davem@xxxxxxxxxxxxx, kuba@xxxxxxxxxx, jejb@xxxxxxxxxxxxx, martin.petersen@xxxxxxxxxx, arnd@xxxxxxxx, hch@xxxxxx, m.szyprowski@xxxxxxxxxxx, robin.murphy@xxxxxxx, kirill.shutemov@xxxxxxxxxxxxxxx, akpm@xxxxxxxxxxxxxxxxxxxx, rppt@xxxxxxxxxx, Tianyu.Lan@xxxxxxxxxxxxx, thomas.lendacky@xxxxxxx, ardb@xxxxxxxxxx, robh@xxxxxxxxxx, nramas@xxxxxxxxxxxxxxxxxxx, pgonda@xxxxxxxxxx, martin.b.radev@xxxxxxxxx, david@xxxxxxxxxx, krish.sadhukhan@xxxxxxxxxx, saravanand@xxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx, keescook@xxxxxxxxxxxx, rientjes@xxxxxxxxxx, hannes@xxxxxxxxxxx, michael.h.kelley@xxxxxxxxxxxxx
- From: Dave Hansen <dave.hansen@xxxxxxxxx>
- Date: Wed, 7 Jul 2021 09:14:28 -0700
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- Cc: iommu@xxxxxxxxxxxxxxxxxxxxxxxxxx, linux-arch@xxxxxxxxxxxxxxx, linux-hyperv@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux-scsi@xxxxxxxxxxxxxxx, netdev@xxxxxxxxxxxxxxx, vkuznets@xxxxxxxxxx, brijesh.singh@xxxxxxx, anparri@xxxxxxxxxxxxx
- Delivery-date: Wed, 07 Jul 2021 16:14:45 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
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/
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