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authorLaszlo Ersek <lersek@redhat.com>2017-07-04 15:09:51 +0200
committerLaszlo Ersek <lersek@redhat.com>2017-07-05 22:29:28 +0200
commitd04b72c67097ba4a3f937bdfbe310e4de30c8147 (patch)
tree5d57c94ff32269a0b638ccd4e669bf246af66ae9
parentd5e064447f8c2bcd4477631bf6fcd8fde7aae51b (diff)
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OvmfPkg: mention the extended TSEG near the PcdQ35TsegMbytes declaration
PlatformPei can now overwrite PcdQ35TsegMbytes; document this in "OvmfPkg/OvmfPkg.dec". Cc: Jordan Justen <jordan.l.justen@intel.com> Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
-rw-r--r--OvmfPkg/OvmfPkg.dec7
1 files changed, 4 insertions, 3 deletions
diff --git a/OvmfPkg/OvmfPkg.dec b/OvmfPkg/OvmfPkg.dec
index c46b72f069..e5f74a1248 100644
--- a/OvmfPkg/OvmfPkg.dec
+++ b/OvmfPkg/OvmfPkg.dec
@@ -129,10 +129,11 @@
gUefiOvmfPkgTokenSpaceGuid.PcdPciMmio64Size|0x0|UINT64|0x27
## The following setting controls how many megabytes we configure as TSEG on
- # Q35, for SMRAM purposes. Permitted values are: 1, 2, 8. Other values cause
- # undefined behavior.
+ # Q35, for SMRAM purposes. Permitted defaults are: 1, 2, 8. Other defaults
+ # cause undefined behavior. During boot, the PCD is updated by PlatformPei
+ # to reflect the extended TSEG size, if one is advertized by QEMU.
#
- # This PCD is only consulted if PcdSmmSmramRequire is TRUE (see below).
+ # This PCD is only accessed if PcdSmmSmramRequire is TRUE (see below).
gUefiOvmfPkgTokenSpaceGuid.PcdQ35TsegMbytes|8|UINT16|0x20
[PcdsFeatureFlag]