From: Laszlo Ersek <lersek@redhat.com>
To: Jordan Justen <jordan.l.justen@intel.com>,
Brijesh Singh <brijesh.singh@amd.com>,
edk2-devel@lists.01.org
Cc: Thomas.Lendacky@amd.com, Jiewen Yao <jiewen.yao@intel.com>,
leo.duran@amd.com
Subject: Re: [RFC v4 06/13] OvmfPkg:AmdSevDxe: add AmdSevDxe driver
Date: Thu, 11 May 2017 22:14:34 +0200 [thread overview]
Message-ID: <f04f948c-bf08-2868-709d-574011e82d73@redhat.com> (raw)
In-Reply-To: <149452462682.9607.8151737434916832513@jljusten-skl.jf.intel.com>
On 05/11/17 19:43, Jordan Justen wrote:
> On 2017-05-11 08:53:39, Laszlo Ersek wrote:
>> (5) Please mention that the driver is being added to the APRIORI DXE
>> file for a separate reason as well (not just for the early clearing of
>> the C bit on MMIO/NonExistent): OvmfPkg's DXE phase modules that tailor
>> their behavior to SEV presence will assume that the IOMMU protocol
>> exported by this driver is available *at once*.
>
> What other code depends on this being run apriori?
Minimally, every module that is a client of the DXE-phase fw-cfg library
instance. That library instance uses the EdkII IOMMU protocol for
allocating and freeing the non-encrypted bounce buffer needed for the
fw_cfg DMA transfer. The protocol is only used / needed when SEV is
detected.
Thanks
Laszlo
next prev parent reply other threads:[~2017-05-11 20:14 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-10 22:09 [RFC v4 00/13] x86: Secure Encrypted Virtualization (AMD) Brijesh Singh
2017-05-10 22:09 ` [RFC v4 01/13] UefiCpuPkg: Define AMD Memory Encryption specific CPUID and MSR Brijesh Singh
2017-05-11 0:30 ` Fan, Jeff
2017-05-10 22:09 ` [RFC v4 02/13] OvmfPkg/ResetVector: Set C-bit when building initial page table Brijesh Singh
2017-05-11 11:40 ` Laszlo Ersek
2017-05-10 22:09 ` [RFC v4 03/13] OvmfPkg: Update dsc to use IoLib from BaseIoLibIntrinsicSev.inf Brijesh Singh
2017-05-11 11:46 ` Laszlo Ersek
2017-05-10 22:09 ` [RFC v4 04/13] OvmfPkg/BaseMemcryptSevLib: Add SEV helper library Brijesh Singh
2017-05-11 14:04 ` Laszlo Ersek
2017-05-11 18:03 ` Brijesh Singh
2017-05-10 22:09 ` [RFC v4 05/13] OvmfPkg/PlatformPei: Set memory encryption PCD when SEV is enabled Brijesh Singh
2017-05-11 14:37 ` Laszlo Ersek
2017-05-11 18:04 ` Brijesh Singh
2017-05-10 22:09 ` [RFC v4 06/13] OvmfPkg:AmdSevDxe: add AmdSevDxe driver Brijesh Singh
2017-05-11 0:56 ` Yao, Jiewen
2017-05-11 15:19 ` Laszlo Ersek
2017-05-11 15:53 ` Laszlo Ersek
2017-05-11 17:43 ` Jordan Justen
2017-05-11 18:01 ` Brijesh Singh
2017-05-15 17:47 ` Jordan Justen
2017-05-16 12:04 ` Brijesh Singh
2017-05-16 17:56 ` Jordan Justen
2017-05-16 20:25 ` Brijesh Singh
2017-05-18 8:50 ` Laszlo Ersek
2017-05-11 20:14 ` Laszlo Ersek [this message]
2017-05-11 18:12 ` Brijesh Singh
2017-05-10 22:09 ` [RFC v4 07/13] OvmfPkg/QemuFwCfgLib: Provide Pei and Dxe specific library Brijesh Singh
2017-05-11 15:40 ` Laszlo Ersek
2017-05-11 18:16 ` Brijesh Singh
2017-05-10 22:09 ` [RFC v4 08/13] OvmfPkg/QemuFwCfgLib: Prepare for SEV support Brijesh Singh
2017-05-11 15:57 ` Laszlo Ersek
2017-05-10 22:09 ` [RFC v4 09/13] OvmfPkg/QemuFwCfgLib: Implement SEV internal function for SEC phase Brijesh Singh
2017-05-11 16:24 ` Laszlo Ersek
2017-05-11 18:21 ` Brijesh Singh
2017-05-10 22:09 ` [RFC v4 10/13] OvmfPkg/QemuFwCfgLib: Implement SEV internal functions for PEI phase Brijesh Singh
2017-05-11 16:38 ` Laszlo Ersek
2017-05-10 22:09 ` [RFC v4 11/13] OvmfPkg/QemuFwCfgLib: Implement SEV internal function for Dxe phase Brijesh Singh
2017-05-11 17:07 ` Laszlo Ersek
2017-05-10 22:09 ` [RFC v4 12/13] OvmfPkg/QemuFwCfgLib: Add option to dynamic alloc FW_CFG_DMA Access Brijesh Singh
2017-05-11 17:10 ` Laszlo Ersek
2017-05-10 22:09 ` [RFC v4 13/13] OvmfPkg/QemuFwCfgLib: Add SEV support Brijesh Singh
2017-05-11 17:44 ` Laszlo Ersek
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