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* [PATCH v2 0/3] reuse the SevEsWork area
@ 2021-08-05 20:42 Brijesh Singh
  2021-08-05 20:42 ` [PATCH v2 1/3] OvmfPkg: introduce a common work area Brijesh Singh
                   ` (3 more replies)
  0 siblings, 4 replies; 6+ messages in thread
From: Brijesh Singh @ 2021-08-05 20:42 UTC (permalink / raw)
  To: devel
  Cc: James Bottomley, Min Xu, Jiewen Yao, Tom Lendacky, Jordan Justen,
	Ard Biesheuvel, Erdem Aktas, Michael Roth, Brijesh Singh

Based on the discussion on the mailing list, we agreed that instead
of wasting extra page in the MEMFD, we can reuse the SevEsWorkArea
buffer for the TDX. To avoid any confusion, lets introduce a OvmfWorkArea
that will contains 32 bytes of header followed by the actual workarea.

While at it, move the code to clear the GHCB page from PageTable build
to AmdSev.asm.

I have used the existing TDX BZ for it because the request came
during the TDX patch review. if anyone have concern please let me know
and I will happily create a new BZ.

Full tree is at: https://github.com/AMDESE/ovmf/tree/sev-new-work-area

Brijesh Singh (3):
  OvmfPkg: introduce a common work area
  OvmfPkg/ResetVector: update SEV support to use new work area format
  OvmfPkg/ResetVector: move the GHCB page setup in AmdSev.asm

Cc: James Bottomley <jejb@linux.ibm.com>
Cc: Min Xu <min.m.xu@intel.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
Cc: Erdem Aktas <erdemaktas@google.com>

Changes since v1:
 - address Jiewen's feedback.

Brijesh Singh (3):
  OvmfPkg: introduce a common work area
  OvmfPkg/ResetVector: update SEV support to use new work area format
  OvmfPkg/ResetVector: move the GHCB page setup in AmdSev.asm

 OvmfPkg/OvmfPkg.dec                        |  12 +++
 OvmfPkg/OvmfPkgX64.fdf                     |   9 +-
 OvmfPkg/PlatformPei/PlatformPei.inf        |   4 +-
 OvmfPkg/ResetVector/ResetVector.inf        |   1 +
 OvmfPkg/Sec/SecMain.inf                    |   2 +
 OvmfPkg/Include/Library/MemEncryptSevLib.h |  21 +---
 OvmfPkg/Include/WorkArea.h                 |  67 +++++++++++++
 OvmfPkg/PlatformPei/MemDetect.c            |  32 +++---
 OvmfPkg/Sec/SecMain.c                      |  32 +++++-
 OvmfPkg/OvmfPkgDefines.fdf.inc             |   6 ++
 OvmfPkg/ResetVector/Ia32/AmdSev.asm        | 111 +++++++++++++++++----
 OvmfPkg/ResetVector/Ia32/PageTables64.asm  |  57 ++---------
 OvmfPkg/ResetVector/ResetVector.nasmb      |   1 +
 13 files changed, 247 insertions(+), 108 deletions(-)
 create mode 100644 OvmfPkg/Include/WorkArea.h

-- 
2.17.1


^ permalink raw reply	[flat|nested] 6+ messages in thread

end of thread, other threads:[~2021-08-16 13:48 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2021-08-05 20:42 [PATCH v2 0/3] reuse the SevEsWork area Brijesh Singh
2021-08-05 20:42 ` [PATCH v2 1/3] OvmfPkg: introduce a common work area Brijesh Singh
2021-08-05 20:42 ` [PATCH v2 2/3] OvmfPkg/ResetVector: update SEV support to use new work area format Brijesh Singh
2021-08-05 20:42 ` [PATCH v2 3/3] OvmfPkg/ResetVector: move the GHCB page setup in AmdSev.asm Brijesh Singh
2021-08-15  3:00 ` [PATCH v2 0/3] reuse the SevEsWork area Min Xu
2021-08-16 13:47   ` Brijesh Singh

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