diff options
Diffstat (limited to 'OvmfPkg/PlatformPei')
| -rw-r--r-- | OvmfPkg/PlatformPei/MemDetect.c | 36 | ||||
| -rw-r--r-- | OvmfPkg/PlatformPei/PlatformPei.inf | 1 |
2 files changed, 22 insertions, 15 deletions
diff --git a/OvmfPkg/PlatformPei/MemDetect.c b/OvmfPkg/PlatformPei/MemDetect.c index 47dc9c5437..f32df937f9 100644 --- a/OvmfPkg/PlatformPei/MemDetect.c +++ b/OvmfPkg/PlatformPei/MemDetect.c @@ -33,6 +33,7 @@ Module Name: #include <Library/ResourcePublicationLib.h>
#include <Library/MtrrLib.h>
#include <Library/QemuFwCfgLib.h>
+#include <Library/QemuFwCfgSimpleParserLib.h>
#include "Platform.h"
#include "Cmos.h"
@@ -336,7 +337,7 @@ GetFirstNonAddress ( {
UINT64 FirstNonAddress;
UINT64 Pci64Base, Pci64Size;
- CHAR8 MbString[7 + 1];
+ UINT32 FwCfgPciMmio64Mb;
EFI_STATUS Status;
FIRMWARE_CONFIG_ITEM FwCfgItem;
UINTN FwCfgSize;
@@ -379,25 +380,30 @@ GetFirstNonAddress ( //
// See if the user specified the number of megabytes for the 64-bit PCI host
- // aperture. The number of non-NUL characters in MbString allows for
- // 9,999,999 MB, which is approximately 10 TB.
+ // aperture. Accept an aperture size up to 16TB.
//
// As signaled by the "X-" prefix, this knob is experimental, and might go
// away at any time.
//
- Status = QemuFwCfgFindFile ("opt/ovmf/X-PciMmio64Mb", &FwCfgItem,
- &FwCfgSize);
- if (!EFI_ERROR (Status)) {
- if (FwCfgSize >= sizeof MbString) {
- DEBUG ((EFI_D_WARN,
- "%a: ignoring malformed 64-bit PCI host aperture size from fw_cfg\n",
- __FUNCTION__));
- } else {
- QemuFwCfgSelectItem (FwCfgItem);
- QemuFwCfgReadBytes (FwCfgSize, MbString);
- MbString[FwCfgSize] = '\0';
- Pci64Size = LShiftU64 (AsciiStrDecimalToUint64 (MbString), 20);
+ Status = QemuFwCfgParseUint32 ("opt/ovmf/X-PciMmio64Mb", FALSE,
+ &FwCfgPciMmio64Mb);
+ switch (Status) {
+ case EFI_UNSUPPORTED:
+ case EFI_NOT_FOUND:
+ break;
+ case EFI_SUCCESS:
+ if (FwCfgPciMmio64Mb <= 0x1000000) {
+ Pci64Size = LShiftU64 (FwCfgPciMmio64Mb, 20);
+ break;
}
+ //
+ // fall through
+ //
+ default:
+ DEBUG ((DEBUG_WARN,
+ "%a: ignoring malformed 64-bit PCI host aperture size from fw_cfg\n",
+ __FUNCTION__));
+ break;
}
if (Pci64Size == 0) {
diff --git a/OvmfPkg/PlatformPei/PlatformPei.inf b/OvmfPkg/PlatformPei/PlatformPei.inf index 19f2424981..e72ef7963d 100644 --- a/OvmfPkg/PlatformPei/PlatformPei.inf +++ b/OvmfPkg/PlatformPei/PlatformPei.inf @@ -60,6 +60,7 @@ PeimEntryPoint
QemuFwCfgLib
QemuFwCfgS3Lib
+ QemuFwCfgSimpleParserLib
MtrrLib
MemEncryptSevLib
PcdLib
|