From: James Bottomley <j...@linux.ibm.com>
Add optional hook which calls a verifier with the content of the fw_cfg
command line.
Cc: Laszlo Ersek <ler...@redhat.com>
Cc: Ard Biesheuvel <ardb+tianoc...@kernel.org>
Cc: Jordan Justen <jordan.l.jus...@intel.com>
Cc: Ashish Kalra <ashish.ka...@amd.com>
Cc: Brijesh Singh <brijesh.si...@amd.com>
Cc: Erdem Aktas <erdemak...@google.com>
Cc: James Bottomley <j...@linux.ibm.com>
Cc: Jiewen Yao <jiewen....@intel.com>
Cc: Min Xu <min.m...@intel.com>
Cc: Tom Lendacky <thomas.lenda...@amd.com>
Signed-off-by: James Bottomley <j...@linux.ibm.com>
---
OvmfPkg/Library/GenericQemuLoadImageLib/GenericQemuLoadImageLib.c | 29
++++++++++++++++++++
1 file changed, 29 insertions(+)
diff --git a/OvmfPkg/Library/GenericQemuLoadImageLib/GenericQemuLoadImageLib.c
b/OvmfPkg/Library/GenericQemuLoadImageLib/GenericQemuLoadImageLib.c
index 114db7e8441f..d3067dae1425 100644
--- a/OvmfPkg/Library/GenericQemuLoadImageLib/GenericQemuLoadImageLib.c
+++ b/OvmfPkg/Library/GenericQemuLoadImageLib/GenericQemuLoadImageLib.c
@@ -51,6 +51,28 @@ STATIC CONST KERNEL_VENMEDIA_FILE_DEVPATH mKernelDevicePath
= {
}
};
+STATIC FW_CFG_VERIFIER mVerifier = NULL;
+
+/**
+ Register a verifier for the Firmware Configuration Filesystem to use
+
+ @param[in] Verifier The verifier to register
+
+ @retval EFI_SUCCESS The verifier was successfully registered
+**/
+EFI_STATUS
+EFIAPI
+RegisterFwCfgVerifier (
+ IN FW_CFG_VERIFIER Verifier
+ )
+{
+ if (mVerifier != NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+ mVerifier = Verifier;
+ return EFI_SUCCESS;
+}
+
/**
Download the kernel, the initial ramdisk, and the kernel command line from
QEMU's fw_cfg. The kernel will be instructed via its command line to load
@@ -149,6 +171,13 @@ QemuLoadKernelImage (
goto FreeCommandLine;
}
+ if (mVerifier != NULL) {
+ Status = mVerifier (NULL, CommandLine, CommandLineSize);
+ if (EFI_ERROR (Status)) {
+ goto FreeCommandLine;
+ }
+ }
+
//
// Drop the terminating NUL, convert to UTF-16.
//
--
2.25.1
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