From: "Dionna Glaze" <dionnaglaze@google.com>
To: "Xu, Min M" <min.m.xu@intel.com>
Cc: "devel@edk2.groups.io" <devel@edk2.groups.io>,
Gerd Hoffmann <kraxel@redhat.com>,
"Aktas, Erdem" <erdemaktas@google.com>,
James Bottomley <jejb@linux.ibm.com>,
"Yao, Jiewen" <jiewen.yao@intel.com>,
Tom Lendacky <thomas.lendacky@amd.com>
Subject: Re: [edk2-devel] [PATCH 07/14] OvmfPkg: Add PCD and DEFINEs for Lazy Accept page.
Date: Thu, 16 Jun 2022 09:44:10 -0700 [thread overview]
Message-ID: <CAAH4kHbVj74hUEgi_atw1S+4XViZA6PDw=5_O_wxnSTkwQJQrg@mail.gmail.com> (raw)
In-Reply-To: <PH0PR11MB506402F163BF5006D916849BC5AC9@PH0PR11MB5064.namprd11.prod.outlook.com>
> A question: is there some performance impact when accepting all memory under 4GB?
On SEV-SNP, we accept the HOBs 0-0xA000 and 0x10_0000-0xC00_0000,
which takes a couple seconds, which is non-negligible.
For VMs that want to boot very fast and still have access to a lot of
memory in the long run (e.g., a UEFI app as an enclave or sandbox), I
admit it's not my favorite solution.
That being said, supporting unaccepted memory in the guest means that
the 4GB solution doesn't preclude an accept-on-demand solution in the
future in the case that there is demand.
--
-Dionna Glaze, PhD (she/her)
next prev parent reply other threads:[~2022-06-16 16:44 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-06 2:59 [PATCH 00/14] Introduce Lazy-accept for Tdx guest Min Xu
2022-06-06 2:59 ` [PATCH 01/14] MdeModulePkg: Add PrePiHob.h Min Xu
2022-06-06 2:59 ` [PATCH 02/14] MdePkg: Increase EFI_RESOURCE_MAX_MEMORY_TYPE Min Xu
2022-06-06 3:23 ` Yao, Jiewen
2022-06-07 10:39 ` Gerd Hoffmann
2022-06-08 0:02 ` [edk2-devel] " Min Xu
2022-06-06 2:59 ` [PATCH 03/14] OvmfPkg: Use EFI_RESOURCE_MEMORY_UNACCEPTED which defined in MdeModulePkg Min Xu
2022-06-06 2:59 ` [PATCH 04/14] MdePkg: Add UEFI Unaccepted memory definition Min Xu
2022-06-06 3:23 ` Yao, Jiewen
[not found] ` <004301d87ec6$72e53d00$58afb700$@byosoft.com.cn>
2022-06-15 5:39 ` Min Xu
2022-06-06 2:59 ` [PATCH 05/14] MdeModulePkg: Update Dxe to handle unaccepted memory type Min Xu
[not found] ` <005601d87ec8$7f6f7700$7e4e6500$@byosoft.com.cn>
2022-06-15 6:18 ` [edk2-devel] " Min Xu
2022-06-06 2:59 ` [PATCH 06/14] ShellPkg: Update shell command memmap to show unaccepted memory Min Xu
2022-06-06 3:01 ` Ni, Ray
2022-06-06 3:19 ` Min Xu
2022-06-06 2:59 ` [PATCH 07/14] OvmfPkg: Add PCD and DEFINEs for Lazy Accept page Min Xu
2022-06-07 10:45 ` Gerd Hoffmann
2022-06-08 0:06 ` Min Xu
2022-06-08 6:18 ` Gerd Hoffmann
2022-06-15 3:07 ` Min Xu
2022-06-15 8:05 ` Gerd Hoffmann
2022-06-15 20:51 ` Dionna Glaze
2022-06-16 0:05 ` [edk2-devel] " Min Xu
2022-06-16 5:51 ` Gerd Hoffmann
2022-06-16 7:33 ` Min Xu
2022-06-16 13:09 ` Lendacky, Thomas
2022-06-16 16:44 ` Dionna Glaze [this message]
2022-06-16 18:33 ` Lendacky, Thomas
2022-06-16 23:47 ` Dionna Glaze
2022-06-14 16:10 ` Dionna Glaze
2022-06-15 3:08 ` Min Xu
2022-06-06 2:59 ` [PATCH 08/14] OvmfPkg: Use PcdOvmfWorkAreaBase instead of PcdSevEsWorkAreaBase Min Xu
2022-06-07 10:48 ` Gerd Hoffmann
2022-06-08 0:08 ` Min Xu
2022-06-06 2:59 ` [PATCH 09/14] OvmfPkg: Add MaxAcceptedMemoryAddress in TDX work area Min Xu
2022-06-06 2:59 ` [PATCH 10/14] OvmfPkg: Introduce lazy accept in PlatformInitLib and PlatformPei Min Xu
2022-06-06 2:59 ` [PATCH 11/14] OvmfPkg: Update ConstructFwHobList for lazy accept Min Xu
2022-06-06 3:00 ` [PATCH 12/14] MdePkg: The prototype definition of EfiMemoryAcceptProtocol Min Xu
2022-06-06 3:22 ` Yao, Jiewen
2022-06-08 0:49 ` Min Xu
2022-06-06 3:00 ` [PATCH 13/14] OvmfPkg: Realize EfiMemoryAcceptProtocol in TdxDxe Min Xu
2022-06-06 3:00 ` [PATCH 14/14] MdeModulePkg: Pool and page functions accept memory when OOM occurs Min Xu
2022-08-11 3:17 ` [PATCH 00/14] Introduce Lazy-accept for Tdx guest Min Xu
2022-08-16 6:47 ` Gerd Hoffmann
2022-09-22 20:29 ` Dionna Glaze
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