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Re: [PATCH V4 2/5] x86/hyper-v: Add hyperv Isolation VM check in the cc_platform_has()
- To: Tianyu Lan <ltykernel@xxxxxxxxx>
- From: Christoph Hellwig <hch@xxxxxx>
- Date: Mon, 6 Dec 2021 15:06:51 +0100
- Cc: kys@xxxxxxxxxxxxx, haiyangz@xxxxxxxxxxxxx, sthemmin@xxxxxxxxxxxxx, wei.liu@xxxxxxxxxx, decui@xxxxxxxxxxxxx, tglx@xxxxxxxxxxxxx, mingo@xxxxxxxxxx, bp@xxxxxxxxx, dave.hansen@xxxxxxxxxxxxxxx, x86@xxxxxxxxxx, hpa@xxxxxxxxx, jgross@xxxxxxxx, sstabellini@xxxxxxxxxx, boris.ostrovsky@xxxxxxxxxx, joro@xxxxxxxxxx, will@xxxxxxxxxx, davem@xxxxxxxxxxxxx, kuba@xxxxxxxxxx, jejb@xxxxxxxxxxxxx, martin.petersen@xxxxxxxxxx, arnd@xxxxxxxx, hch@xxxxxxxxxxxxx, m.szyprowski@xxxxxxxxxxx, robin.murphy@xxxxxxx, thomas.lendacky@xxxxxxx, Tianyu.Lan@xxxxxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx, michael.h.kelley@xxxxxxxxxxxxx, iommu@xxxxxxxxxxxxxxxxxxxxxxxxxx, linux-arch@xxxxxxxxxxxxxxx, linux-hyperv@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux-scsi@xxxxxxxxxxxxxxx, netdev@xxxxxxxxxxxxxxx, vkuznets@xxxxxxxxxx, brijesh.singh@xxxxxxx, konrad.wilk@xxxxxxxxxx, hch@xxxxxx, parri.andrea@xxxxxxxxx, dave.hansen@xxxxxxxxx
- Delivery-date: Mon, 06 Dec 2021 14:07:07 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On Sun, Dec 05, 2021 at 03:18:10AM -0500, Tianyu Lan wrote:
> +static bool hyperv_cc_platform_has(enum cc_attr attr)
> +{
> +#ifdef CONFIG_HYPERV
> + return attr == CC_ATTR_GUEST_MEM_ENCRYPT;
> +#else
> + return false;
> +#endif
> +}
Can we even end up here without CONFIG_HYPERV?
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