diff options
-rw-r--r-- | OvmfPkg/PlatformDxe/Platform.c | 115 | ||||
-rw-r--r-- | OvmfPkg/PlatformDxe/PlatformConfig.c | 2 | ||||
-rw-r--r-- | OvmfPkg/PlatformDxe/PlatformConfig.h | 2 |
3 files changed, 116 insertions, 3 deletions
diff --git a/OvmfPkg/PlatformDxe/Platform.c b/OvmfPkg/PlatformDxe/Platform.c index 4d432f1..ac31faf 100644 --- a/OvmfPkg/PlatformDxe/Platform.c +++ b/OvmfPkg/PlatformDxe/Platform.c @@ -109,6 +109,11 @@ STATIC EFI_EVENT mGopEvent; STATIC VOID *mGopTracker;
//
+// The driver image handle, used to obtain the device path for <ConfigHdr>.
+//
+STATIC EFI_HANDLE mImageHandle;
+
+//
// Cache the resolutions we get from the GOP.
//
typedef struct {
@@ -229,6 +234,10 @@ ExtractConfig ( {
MAIN_FORM_STATE MainFormState;
EFI_STATUS Status;
+ EFI_STRING ConfigRequestHdr;
+ EFI_STRING ConfigRequest;
+ UINTN Size;
+ BOOLEAN AllocatedRequest;
DEBUG ((DEBUG_VERBOSE, "%a: Request=\"%s\"\n", __FUNCTION__, Request));
@@ -236,18 +245,73 @@ ExtractConfig ( return EFI_INVALID_PARAMETER;
}
+ ConfigRequestHdr = NULL;
+ ConfigRequest = NULL;
+ Size = 0;
+ AllocatedRequest = FALSE;
+
+ //
+ // Check if <ConfigHdr> matches the GUID and name
+ //
+ *Progress = Request;
+ if ((Request != NULL) &&
+ !HiiIsConfigHdrMatch (
+ Request,
+ &gOvmfPlatformConfigGuid,
+ mVariableName
+ )
+ )
+ {
+ return EFI_NOT_FOUND;
+ }
+
Status = PlatformConfigToFormState (&MainFormState);
if (EFI_ERROR (Status)) {
- *Progress = Request;
return Status;
}
+ if ((Request == NULL) || (StrStr (Request, L"OFFSET") == NULL)) {
+ //
+ // Request has no <RequestElement>, so construct full request string.
+ // Allocate and fill a buffer large enough to hold <ConfigHdr>
+ // followed by "&OFFSET=0&WIDTH=WWWWWWWWWWWWWWWW" followed by a
+ // null terminator.
+ //
+ ConfigRequestHdr = HiiConstructConfigHdr (
+ &gOvmfPlatformConfigGuid,
+ mVariableName,
+ mImageHandle
+ );
+ if (ConfigRequestHdr == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ Size = (StrLen (ConfigRequestHdr) + 32 + 1) * sizeof (CHAR16);
+ ConfigRequest = AllocateZeroPool (Size);
+ AllocatedRequest = TRUE;
+ if (ConfigRequest == NULL) {
+ FreePool (ConfigRequestHdr);
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ UnicodeSPrint (
+ ConfigRequest,
+ Size,
+ L"%s&OFFSET=0&WIDTH=%016LX",
+ ConfigRequestHdr,
+ sizeof MainFormState
+ );
+ FreePool (ConfigRequestHdr);
+ } else {
+ ConfigRequest = Request;
+ }
+
//
// Answer the textual request keying off the binary form state.
//
Status = gHiiConfigRouting->BlockToConfig (
gHiiConfigRouting,
- Request,
+ ConfigRequest,
(VOID *)&MainFormState,
sizeof MainFormState,
Results,
@@ -265,6 +329,33 @@ ExtractConfig ( DEBUG ((DEBUG_VERBOSE, "%a: Results=\"%s\"\n", __FUNCTION__, *Results));
}
+ //
+ // If we used a newly allocated ConfigRequest, update Progress to point to
+ // original Request instead of ConfigRequest.
+ //
+ if (Request == NULL) {
+ *Progress = NULL;
+ } else if (StrStr (Request, L"OFFSET") == NULL) {
+ if (EFI_ERROR (Status)) {
+ //
+ // Since we constructed ConfigRequest, failure can only occur if there
+ // is not enough memory. In this case, we point Progress to the first
+ // character of Request.
+ //
+ *Progress = Request;
+ } else {
+ //
+ // In case of success, we point Progress to the null terminator of
+ // Request.
+ //
+ *Progress = Request + StrLen (Request);
+ }
+ }
+
+ if (AllocatedRequest) {
+ FreePool (ConfigRequest);
+ }
+
return Status;
}
@@ -349,6 +440,21 @@ RouteConfig ( }
//
+ // Check if <ConfigHdr> matches the GUID and name
+ //
+ *Progress = Configuration;
+ if ((Configuration != NULL) &&
+ !HiiIsConfigHdrMatch (
+ Configuration,
+ &gOvmfPlatformConfigGuid,
+ mVariableName
+ )
+ )
+ {
+ return EFI_NOT_FOUND;
+ }
+
+ //
// the "read" step in RMW
//
Status = PlatformConfigToFormState (&MainFormState);
@@ -867,6 +973,11 @@ PlatformInit ( }
//
+ // Save the driver image handle.
+ //
+ mImageHandle = ImageHandle;
+
+ //
// Publish the HII package list to HII Database.
//
mInstalledPackages = HiiAddPackages (
diff --git a/OvmfPkg/PlatformDxe/PlatformConfig.c b/OvmfPkg/PlatformDxe/PlatformConfig.c index e202ac5..f5ac2d0 100644 --- a/OvmfPkg/PlatformDxe/PlatformConfig.c +++ b/OvmfPkg/PlatformDxe/PlatformConfig.c @@ -21,7 +21,7 @@ //
// Name of the UEFI variable that we use for persistent storage.
//
-STATIC CHAR16 mVariableName[] = L"PlatformConfig";
+CHAR16 mVariableName[] = L"PlatformConfig";
/**
Serialize and persistently save platform configuration.
diff --git a/OvmfPkg/PlatformDxe/PlatformConfig.h b/OvmfPkg/PlatformDxe/PlatformConfig.h index 902c9b2..5d9b457 100644 --- a/OvmfPkg/PlatformDxe/PlatformConfig.h +++ b/OvmfPkg/PlatformDxe/PlatformConfig.h @@ -50,4 +50,6 @@ PlatformConfigLoad ( #define PLATFORM_CONFIG_F_GRAPHICS_RESOLUTION BIT0
#define PLATFORM_CONFIG_F_DOWNGRADE BIT63
+extern CHAR16 mVariableName[];
+
#endif // _PLATFORM_CONFIG_H_
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