From: Dave Hansen <dave.hansen@intel.com>
To: Tianyu Lan <ltykernel@gmail.com>,
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
Cc: 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
Subject: Re: [PATCH V7 1/5] swiotlb: Add swiotlb bounce buffer remap function for HV IVM
Date: Mon, 13 Dec 2021 08:45:00 -0800 [thread overview]
Message-ID: <198e9243-abca-b23e-0e8e-8581a7329ede@intel.com> (raw)
In-Reply-To: <20211213071407.314309-2-ltykernel@gmail.com>
On 12/12/21 11:14 PM, Tianyu Lan wrote:
> In Isolation VM with AMD SEV, bounce buffer needs to be accessed via
> extra address space which is above shared_gpa_boundary (E.G 39 bit
> address line) reported by Hyper-V CPUID ISOLATION_CONFIG. The access
> physical address will be original physical address + shared_gpa_boundary.
> The shared_gpa_boundary in the AMD SEV SNP spec is called virtual top of
> memory(vTOM). Memory addresses below vTOM are automatically treated as
> private while memory above vTOM is treated as shared.
This seems to be independently reintroducing some of the SEV
infrastructure. Is it really OK that this doesn't interact at all with
any existing SEV code?
For instance, do we need a new 'swiotlb_unencrypted_base', or should
this just be using sme_me_mask somehow?
next prev parent reply other threads:[~2021-12-13 16:45 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 [this message]
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
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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