From: Wei Liu <wei.liu@kernel.org>
To: Tianyu Lan <ltykernel@gmail.com>
Cc: kys@microsoft.com, haiyangz@microsoft.com,
sthemmin@microsoft.com, wei.liu@kernel.org, decui@microsoft.com,
tglx@linutronix.de, mingo@redhat.com, bp@alien8.de,
dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com,
davem@davemloft.net, kuba@kernel.org, jejb@linux.ibm.com,
martin.petersen@oracle.com, arnd@arndb.de, hch@infradead.org,
m.szyprowski@samsung.com, robin.murphy@arm.com,
thomas.lendacky@amd.com, Tianyu.Lan@microsoft.com,
michael.h.kelley@microsoft.com, iommu@lists.linux-foundation.org,
linux-arch@vger.kernel.org, linux-hyperv@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org,
netdev@vger.kernel.org, vkuznets@redhat.com,
brijesh.singh@amd.com, konrad.wilk@oracle.com, hch@lst.de,
joro@8bytes.org, parri.andrea@gmail.com, dave.hansen@intel.com
Subject: Re: [PATCH V7 2/5] x86/hyper-v: Add hyperv Isolation VM check in the cc_platform_has()
Date: Tue, 14 Dec 2021 15:33:03 +0000 [thread overview]
Message-ID: <20211214153303.qmhowu4lfpcp4gej@liuwe-devbox-debian-v2> (raw)
In-Reply-To: <20211213071407.314309-3-ltykernel@gmail.com>
On Mon, Dec 13, 2021 at 02:14:03AM -0500, Tianyu Lan wrote:
> From: Tianyu Lan <Tianyu.Lan@microsoft.com>
>
> Hyper-V provides Isolation VM for confidential computing support and
> guest memory is encrypted in it. Places checking cc_platform_has()
> with GUEST_MEM_ENCRYPT attr should return "True" in Isolation vm. e.g,
> swiotlb bounce buffer size needs to adjust according to memory size
> in the sev_setup_arch(). Add GUEST_MEM_ENCRYPT check for Hyper-V Isolation
> VM.
>
> Signed-off-by: Tianyu Lan <Tianyu.Lan@microsoft.com>
x86 maintainers, any comment on this patch?
> ---
> Change since v6:
> * Change the order in the cc_platform_has() and check sev first.
>
> Change since v3:
> * Change code style of checking GUEST_MEM attribute in the
> hyperv_cc_platform_has().
> ---
> arch/x86/kernel/cc_platform.c | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/arch/x86/kernel/cc_platform.c b/arch/x86/kernel/cc_platform.c
> index 03bb2f343ddb..6cb3a675e686 100644
> --- a/arch/x86/kernel/cc_platform.c
> +++ b/arch/x86/kernel/cc_platform.c
> @@ -11,6 +11,7 @@
> #include <linux/cc_platform.h>
> #include <linux/mem_encrypt.h>
>
> +#include <asm/mshyperv.h>
> #include <asm/processor.h>
>
> static bool __maybe_unused intel_cc_platform_has(enum cc_attr attr)
> @@ -58,12 +59,19 @@ static bool amd_cc_platform_has(enum cc_attr attr)
> #endif
> }
>
> +static bool hyperv_cc_platform_has(enum cc_attr attr)
> +{
> + return attr == CC_ATTR_GUEST_MEM_ENCRYPT;
> +}
>
> bool cc_platform_has(enum cc_attr attr)
> {
> if (sme_me_mask)
> return amd_cc_platform_has(attr);
>
> + if (hv_is_isolation_supported())
> + return hyperv_cc_platform_has(attr);
> +
> return false;
> }
> EXPORT_SYMBOL_GPL(cc_platform_has);
> --
> 2.25.1
>
next prev parent reply other threads:[~2021-12-14 15:33 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-13 7:14 [PATCH V7 0/5] x86/Hyper-V: Add Hyper-V Isolation VM support(Second part) Tianyu Lan
2021-12-13 7:14 ` [PATCH V7 1/5] swiotlb: Add swiotlb bounce buffer remap function for HV IVM Tianyu Lan
2021-12-13 16:45 ` Dave Hansen
2021-12-14 4:36 ` Tianyu Lan
2021-12-14 18:40 ` Dave Hansen
2021-12-14 22:23 ` Tom Lendacky
2021-12-14 22:40 ` Dave Hansen
2021-12-15 5:00 ` Tianyu Lan
2021-12-16 11:05 ` Wei Liu
2021-12-13 7:14 ` [PATCH V7 2/5] x86/hyper-v: Add hyperv Isolation VM check in the cc_platform_has() Tianyu Lan
2021-12-14 15:33 ` Wei Liu [this message]
2021-12-14 16:05 ` Borislav Petkov
2021-12-14 16:10 ` Wei Liu
2021-12-13 7:14 ` [PATCH V7 3/5] hyper-v: Enable swiotlb bounce buffer for Isolation VM Tianyu Lan
2021-12-13 7:14 ` [PATCH V7 4/5] scsi: storvsc: Add Isolation VM support for storvsc driver Tianyu Lan
2021-12-15 19:19 ` Long Li
2022-02-03 23:53 ` Jakub Kicinski
2022-02-04 2:55 ` Jakub Kicinski
2021-12-13 7:14 ` [PATCH V7 5/5] net: netvsc: Add Isolation VM support for netvsc driver Tianyu Lan
2021-12-13 16:56 ` Haiyang Zhang
2021-12-14 18:35 ` [PATCH V7 0/5] x86/Hyper-V: Add Hyper-V Isolation VM support(Second part) Michael Kelley (LINUX)
2021-12-17 18:02 ` Wei Liu
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