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| author | Laszlo Ersek <lersek@redhat.com> | 2015-11-30 18:42:15 +0000 |
|---|---|---|
| committer | lersek <lersek@Edk2> | 2015-11-30 18:42:15 +0000 |
| commit | 67d8659474a051f58a5f30d4c8fba970a5d3be2c (patch) | |
| tree | 78206d17933be9c1f92dfa2d32e5f8c0d6533909 /OvmfPkg/OvmfPkgIa32X64.fdf | |
| parent | 1a7edbbca105c56cd63c19ccc94e4284dbd5c2d0 (diff) | |
| download | edk2-platforms-67d8659474a051f58a5f30d4c8fba970a5d3be2c.tar.xz | |
OvmfPkg: LockBox: use SMM stack with -D SMM_REQUIRE
During DXE, drivers save data in the LockBox. A save operation is layered
as follows:
- The unprivileged driver wishing to store data in the LockBox links
against the "MdeModulePkg/Library/SmmLockBoxLib/SmmLockBoxDxeLib.inf"
library instance.
The library allows the unprivileged driver to format requests for the
privileged SMM LockBox driver (see below), and to parse responses.
We apply this resolution for DXE_DRIVER modules.
- The privileged SMM LockBox driver is built from
"MdeModulePkg/Universal/LockBox/SmmLockBox/SmmLockBox.inf". This driver
has module type DXE_SMM_DRIVER and can access SMRAM.
The driver delegates command parsing and response formatting to
"MdeModulePkg/Library/SmmLockBoxLib/SmmLockBoxSmmLib.inf".
Therefore we include this DXE_SMM_DRIVER in the build, and apply said
resolution specifically to it.
(Including the driver requires us to resolve a few of other library
classes for DXE_SMM_DRIVER modules.)
- In PEI, the S3 Resume PEIM (UefiCpuPkg/Universal/Acpi/S3Resume2Pei)
retrieves data from the LockBox. It is capable of searching SMRAM
itself.
We resolve LockBoxLib to
"MdeModulePkg/Library/SmmLockBoxLib/SmmLockBoxPeiLib.inf" specifically
for this one PEIM.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@19048 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'OvmfPkg/OvmfPkgIa32X64.fdf')
| -rw-r--r-- | OvmfPkg/OvmfPkgIa32X64.fdf | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/OvmfPkg/OvmfPkgIa32X64.fdf b/OvmfPkg/OvmfPkgIa32X64.fdf index 165fd053b4..674932c76e 100644 --- a/OvmfPkg/OvmfPkgIa32X64.fdf +++ b/OvmfPkg/OvmfPkgIa32X64.fdf @@ -361,6 +361,7 @@ INF OvmfPkg/SmmControl2Dxe/SmmControl2Dxe.inf INF MdeModulePkg/Core/PiSmmCore/PiSmmIpl.inf
INF MdeModulePkg/Core/PiSmmCore/PiSmmCore.inf
INF UefiCpuPkg/CpuIo2Smm/CpuIo2Smm.inf
+INF MdeModulePkg/Universal/LockBox/SmmLockBox/SmmLockBox.inf
!endif
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