From: Dave Hansen <dave.hansen@intel.com>
To: Michael Kelley <mikelley@microsoft.com>,
hpa@zytor.com, kys@microsoft.com, haiyangz@microsoft.com,
wei.liu@kernel.org, decui@microsoft.com, luto@kernel.org,
peterz@infradead.org, davem@davemloft.net, edumazet@google.com,
kuba@kernel.org, pabeni@redhat.com, lpieralisi@kernel.org,
robh@kernel.org, kw@linux.com, bhelgaas@google.com,
arnd@arndb.de, hch@infradead.org, m.szyprowski@samsung.com,
robin.murphy@arm.com, thomas.lendacky@amd.com,
brijesh.singh@amd.com, tglx@linutronix.de, mingo@redhat.com,
bp@alien8.de, dave.hansen@linux.intel.com,
Tianyu.Lan@microsoft.com, kirill.shutemov@linux.intel.com,
sathyanarayanan.kuppuswamy@linux.intel.com, ak@linux.intel.com,
isaku.yamahata@intel.com, dan.j.williams@intel.com,
jane.chu@oracle.com, seanjc@google.com, tony.luck@intel.com,
x86@kernel.org, linux-kernel@vger.kernel.org,
linux-hyperv@vger.kernel.org, netdev@vger.kernel.org,
linux-pci@vger.kernel.org, linux-arch@vger.kernel.org,
iommu@lists.linux.dev
Subject: Re: [PATCH v2 02/12] x86/ioapic: Gate decrypted mapping on cc_platform_has() attribute
Date: Fri, 11 Nov 2022 16:21:45 -0800 [thread overview]
Message-ID: <50a8517d-328e-2178-e98c-4b160456e092@intel.com> (raw)
In-Reply-To: <1668147701-4583-3-git-send-email-mikelley@microsoft.com>
On 11/10/22 22:21, Michael Kelley wrote:
> * Ensure fixmaps for IOAPIC MMIO respect memory encryption pgprot
> * bits, just like normal ioremap():
> */
> - flags = pgprot_decrypted(flags);
> + if (!cc_platform_has(CC_ATTR_HAS_PARAVISOR))
> + flags = pgprot_decrypted(flags);
This begs the question whether *all* paravisors will want to avoid a
decrypted ioapic mapping. Is this _fundamental_ to paravisors, or it is
an implementation detail of this _individual_ paravisor?
next prev parent reply other threads:[~2022-11-12 0:21 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-11 6:21 [PATCH v2 00/12] Drivers: hv: Add PCI pass-thru support to Hyper-V Confidential VMs Michael Kelley
2022-11-11 6:21 ` [PATCH v2 01/12] x86/ioremap: Fix page aligned size calculation in __ioremap_caller() Michael Kelley
2022-11-12 0:11 ` Dave Hansen
2022-11-12 4:31 ` Michael Kelley (LINUX)
2022-11-14 16:40 ` Dave Hansen
2022-11-14 16:53 ` Michael Kelley (LINUX)
2022-11-14 16:57 ` Dave Hansen
2022-11-14 17:25 ` Michael Kelley (LINUX)
2022-11-11 6:21 ` [PATCH v2 02/12] x86/ioapic: Gate decrypted mapping on cc_platform_has() attribute Michael Kelley
2022-11-12 0:21 ` Dave Hansen [this message]
2022-11-12 4:48 ` Michael Kelley (LINUX)
2022-11-14 16:23 ` Dave Hansen
2022-11-14 16:54 ` Michael Kelley (LINUX)
2022-11-11 6:21 ` [PATCH v2 03/12] x86/hyperv: Reorder code in prep for subsequent patch Michael Kelley
2022-11-11 6:21 ` [PATCH v2 04/12] Drivers: hv: Explicitly request decrypted in vmap_pfn() calls Michael Kelley
2022-11-11 6:21 ` [PATCH v2 05/12] x86/hyperv: Change vTOM handling to use standard coco mechanisms Michael Kelley
2022-11-11 18:49 ` Tom Lendacky
2022-11-13 16:01 ` Michael Kelley (LINUX)
2022-11-16 16:38 ` Tom Lendacky
2022-11-11 6:21 ` [PATCH v2 06/12] swiotlb: Remove bounce buffer remapping for Hyper-V Michael Kelley
2022-11-11 6:21 ` [PATCH v2 07/12] Drivers: hv: vmbus: Remove second mapping of VMBus monitor pages Michael Kelley
2022-11-11 6:21 ` [PATCH v2 08/12] Drivers: hv: vmbus: Remove second way of mapping ring buffers Michael Kelley
2022-11-11 6:21 ` [PATCH v2 09/12] hv_netvsc: Remove second mapping of send and recv buffers Michael Kelley
2022-11-11 6:21 ` [PATCH v2 10/12] Drivers: hv: Don't remap addresses that are above shared_gpa_boundary Michael Kelley
2022-11-11 6:21 ` [PATCH v2 11/12] PCI: hv: Add hypercalls to read/write MMIO space Michael Kelley
2022-11-11 6:21 ` [PATCH v2 12/12] PCI: hv: Enable PCI pass-thru devices in Confidential VMs Michael Kelley
2022-11-11 16:44 ` [PATCH v2 00/12] Drivers: hv: Add PCI pass-thru support to Hyper-V " Wei Liu
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