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| author | Laszlo Ersek <lersek@redhat.com> | 2015-09-15 08:35:14 +0000 |
|---|---|---|
| committer | lersek <lersek@Edk2> | 2015-09-15 08:35:14 +0000 |
| commit | ab081a50e5651a5b10e35e12b4b19f7fb67c5735 (patch) | |
| tree | 2620a3e134ffb04524a242540f5444152c02da81 /OvmfPkg/PlatformPei | |
| parent | c075d250f6f2358a7c1b19798935d14d716bd67b (diff) | |
| download | edk2-ab081a50e5651a5b10e35e12b4b19f7fb67c5735.tar.gz edk2-ab081a50e5651a5b10e35e12b4b19f7fb67c5735.tar.bz2 edk2-ab081a50e5651a5b10e35e12b4b19f7fb67c5735.zip | |
OvmfPkg: PlatformPei: take no-exec DXE settings from the QEMU command line
Control them with:
-fw_cfg name=opt/ovmf/PcdPropertiesTableEnable,file=no.txt \
-fw_cfg name=opt/ovmf/PcdSetNxForStack,file=yes.txt
where the contents of the text files can be
[0nN1yY](\n|\r\n)?
The macro trickery is not optimal, but it is caused by PcdSetBool(), which
is itself a macro, and can only take open-coded PCD names (ie. no
variables, like function parameters).
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>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18471 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'OvmfPkg/PlatformPei')
| -rw-r--r-- | OvmfPkg/PlatformPei/Platform.c | 65 | ||||
| -rw-r--r-- | OvmfPkg/PlatformPei/PlatformPei.inf | 2 |
2 files changed, 65 insertions, 2 deletions
diff --git a/OvmfPkg/PlatformPei/Platform.c b/OvmfPkg/PlatformPei/Platform.c index 6a7bc52c45..a6d961673d 100644 --- a/OvmfPkg/PlatformPei/Platform.c +++ b/OvmfPkg/PlatformPei/Platform.c @@ -242,6 +242,68 @@ MemMapInitialization ( }
}
+EFI_STATUS
+GetNamedFwCfgBoolean (
+ IN CHAR8 *FwCfgFileName,
+ OUT BOOLEAN *Setting
+ )
+{
+ EFI_STATUS Status;
+ FIRMWARE_CONFIG_ITEM FwCfgItem;
+ UINTN FwCfgSize;
+ UINT8 Value[3];
+
+ Status = QemuFwCfgFindFile (FwCfgFileName, &FwCfgItem, &FwCfgSize);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+ if (FwCfgSize > sizeof Value) {
+ return EFI_BAD_BUFFER_SIZE;
+ }
+ QemuFwCfgSelectItem (FwCfgItem);
+ QemuFwCfgReadBytes (FwCfgSize, Value);
+
+ if ((FwCfgSize == 1) ||
+ (FwCfgSize == 2 && Value[1] == '\n') ||
+ (FwCfgSize == 3 && Value[1] == '\r' && Value[2] == '\n')) {
+ switch (Value[0]) {
+ case '0':
+ case 'n':
+ case 'N':
+ *Setting = FALSE;
+ return EFI_SUCCESS;
+
+ case '1':
+ case 'y':
+ case 'Y':
+ *Setting = TRUE;
+ return EFI_SUCCESS;
+
+ default:
+ break;
+ }
+ }
+ return EFI_PROTOCOL_ERROR;
+}
+
+#define UPDATE_BOOLEAN_PCD_FROM_FW_CFG(TokenName) \
+ do { \
+ BOOLEAN Setting; \
+ \
+ if (!EFI_ERROR (GetNamedFwCfgBoolean ( \
+ "opt/ovmf/" #TokenName, &Setting))) { \
+ PcdSetBool (TokenName, Setting); \
+ } \
+ } while (0)
+
+VOID
+NoexecDxeInitialization (
+ VOID
+ )
+{
+ UPDATE_BOOLEAN_PCD_FROM_FW_CFG (PcdPropertiesTableEnable);
+ UPDATE_BOOLEAN_PCD_FROM_FW_CFG (PcdSetNxForStack);
+}
VOID
MiscInitialization (
@@ -438,10 +500,9 @@ InitializePlatform ( if (mBootMode != BOOT_ON_S3_RESUME) {
ReserveEmuVariableNvStore ();
-
PeiFvInitialization ();
-
MemMapInitialization ();
+ NoexecDxeInitialization ();
}
MiscInitialization ();
diff --git a/OvmfPkg/PlatformPei/PlatformPei.inf b/OvmfPkg/PlatformPei/PlatformPei.inf index 81335a964f..c2c7da94c4 100644 --- a/OvmfPkg/PlatformPei/PlatformPei.inf +++ b/OvmfPkg/PlatformPei/PlatformPei.inf @@ -83,6 +83,8 @@ gEfiMdeModulePkgTokenSpaceGuid.PcdPciDisableBusEnumeration
gEfiMdeModulePkgTokenSpaceGuid.PcdDxeIplSwitchToLongMode
gEfiMdeModulePkgTokenSpaceGuid.PcdUse1GPageTable
+ gEfiMdeModulePkgTokenSpaceGuid.PcdSetNxForStack
+ gEfiMdeModulePkgTokenSpaceGuid.PcdPropertiesTableEnable
gUefiCpuPkgTokenSpaceGuid.PcdCpuLocalApicBaseAddress
[Ppis]
|