[edk2-devel] [PATCH v1 2/3] ShellPkg: Add varpolicy dynamic shell command
Michael Kubacki
mikuback at linux.microsoft.com
Tue Sep 19 14:32:59 UTC 2023
From: Michael Kubacki <michael.kubacki at microsoft.com>
Adds a new module (dynamic shell command) to ShellPkg that lists
variable policy information for all UEFI variables on the system.
Some other UEFI variable related functionality is also included to
give a greater sense of platform UEFI variable state. This command
is intended to help make variable policies more transparent and
easier to understand and configure on a platform.
Like all dynamic shell commands, a platform only needs to include
`VariablePolicyDynamicCommand.inf` in their flash image to have
the command registered in their UEFI shell.
Include the following lines in platform DSC (in DXE components section):
```
ShellPkg/DynamicCommand/VariablePolicyDynamicCommand/VariablePolicyDynamicCommand.inf {
<PcdsFixedAtBuild>
gEfiShellPkgTokenSpaceGuid.PcdShellLibAutoInitialize|FALSE
}
```
Include the following line in platform FDF:
```
INF ShellPkg/DynamicCommand/VariablePolicyDynamicCommand/VariablePolicyDynamicCommand.inf
```
Cc: Zhichao Gao <zhichao.gao at intel.com>
Cc: Michael D Kinney <michael.d.kinney at intel.com>
Signed-off-by: Michael Kubacki <michael.kubacki at microsoft.com>
---
ShellPkg/DynamicCommand/VariablePolicyDynamicCommand/VariablePolicyDynamicCommand.c | 1009 ++++++++++++++++++++
ShellPkg/DynamicCommand/VariablePolicyDynamicCommand/VariablePolicyDynamicCommand.h | 94 ++
ShellPkg/DynamicCommand/VariablePolicyDynamicCommand/VariablePolicyDynamicCommand.inf | 56 ++
ShellPkg/DynamicCommand/VariablePolicyDynamicCommand/VariablePolicyDynamicCommand.uni | 86 ++
ShellPkg/ShellPkg.dsc | 1 +
5 files changed, 1246 insertions(+)
diff --git a/ShellPkg/DynamicCommand/VariablePolicyDynamicCommand/VariablePolicyDynamicCommand.c b/ShellPkg/DynamicCommand/VariablePolicyDynamicCommand/VariablePolicyDynamicCommand.c
new file mode 100644
index 000000000000..49993f635396
--- /dev/null
+++ b/ShellPkg/DynamicCommand/VariablePolicyDynamicCommand/VariablePolicyDynamicCommand.c
@@ -0,0 +1,1009 @@
+/** @file
+ Main file for the "varpolicy" dynamic UEFI shell command.
+
+ This command can provide detailed UEFI variable policy configuration
+ information in the UEFI shell.
+
+ Copyright (c) Microsoft Corporation.
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include "VariablePolicyDynamicCommand.h"
+
+#include <Library/BaseLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/DebugLib.h>
+#include <Library/HiiLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/PrintLib.h>
+#include <Library/ShellLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include <Library/UefiRuntimeServicesTableLib.h>
+#include <Library/UefiHiiServicesLib.h>
+
+#include <Protocol/HiiPackageList.h>
+#include <Protocol/ShellDynamicCommand.h>
+#include <Protocol/VariablePolicy.h>
+
+#define VAR_POLICY_FLAG_STATS_STR L"-s"
+#define VAR_POLICY_FLAG_POLICY_STR L"-p"
+#define VAR_POLICY_FLAG_VERBOSE_STR L"-v"
+
+#define VAR_POLICY_CMD_MIN_ATTR_STR_LEN 64
+
+EFI_HII_HANDLE mVarPolicyShellCommandHiiHandle = NULL;
+
+STATIC CONST SHELL_PARAM_ITEM ParamList[] = {
+ { VAR_POLICY_FLAG_POLICY_STR, TypeFlag },
+ { VAR_POLICY_FLAG_STATS_STR, TypeFlag },
+ { VAR_POLICY_FLAG_VERBOSE_STR, TypeFlag },
+ { NULL, TypeMax }
+};
+
+STATIC CONST VAR_POLICY_CMD_VAR_NAMESPACE mVarNamespaces[] = {
+ {
+ VariableVendorCapsule,
+ &gEfiCapsuleVendorGuid,
+ L"Capsule"
+ },
+ {
+ VariableVendorCapsuleReport,
+ &gEfiCapsuleReportGuid,
+ L"Capsule Reporting"
+ },
+ {
+ VariableVendorGlobal,
+ &gEfiGlobalVariableGuid,
+ L"UEFI Global"
+ },
+ {
+ VariableVendorMorControl,
+ &gEfiMemoryOverwriteRequestControlLockGuid,
+ L"Memory Overwrite Request (MOR) Control Lock"
+ }
+};
+
+/**
+ Returns UEFI variable attribute information in a string.
+
+ AttributesStrSize must at least be VAR_POLICY_CMD_MIN_ATTR_STR_LEN in length
+ or EFI_INVALID_PARAMETER will be returned.
+
+ @param[in] Attributes The UEFI variable attributes.
+ @param[in] AttributesStrSize The size, in bytes, of AttributesStr.
+ @param[out] AttributesStr The Unicode string for the given attributes.
+
+ @retval EFI_SUCCESS The attributes were converted to a string successfully.
+ @retval EFI_INVALID_PARAMETER The AttributesStr pointer is NULL.
+
+**/
+EFI_STATUS
+GetAttributesString (
+ IN UINT32 Attributes,
+ IN UINTN AttributesStrSize,
+ OUT CHAR16 *AttributesStr
+ )
+{
+ if ((AttributesStr == NULL) || (AttributesStrSize < VAR_POLICY_CMD_MIN_ATTR_STR_LEN)) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ AttributesStr[0] = L'0';
+ AttributesStr[1] = L'x';
+ AttributesStr[2] = L'\0';
+
+ UnicodeValueToStringS (AttributesStr + 2, AttributesStrSize - 2, (RADIX_HEX), (INT64)Attributes, 30);
+
+ if (Attributes == 0) {
+ StrCatS (AttributesStr, AttributesStrSize, L" No Attributes");
+ } else {
+ if ((Attributes & EFI_VARIABLE_NON_VOLATILE) == EFI_VARIABLE_NON_VOLATILE) {
+ StrCatS (AttributesStr, AttributesStrSize, L" NV");
+ Attributes ^= EFI_VARIABLE_NON_VOLATILE;
+ }
+
+ if ((Attributes & EFI_VARIABLE_BOOTSERVICE_ACCESS) == EFI_VARIABLE_BOOTSERVICE_ACCESS) {
+ StrCatS (AttributesStr, AttributesStrSize, L" BS");
+ Attributes ^= EFI_VARIABLE_BOOTSERVICE_ACCESS;
+ }
+
+ if ((Attributes & EFI_VARIABLE_RUNTIME_ACCESS) == EFI_VARIABLE_RUNTIME_ACCESS) {
+ StrCatS (AttributesStr, AttributesStrSize, L" RT");
+ Attributes ^= EFI_VARIABLE_RUNTIME_ACCESS;
+ }
+
+ if ((Attributes & EFI_VARIABLE_HARDWARE_ERROR_RECORD) == EFI_VARIABLE_HARDWARE_ERROR_RECORD) {
+ StrCatS (AttributesStr, AttributesStrSize, L" HW-Error");
+ Attributes ^= EFI_VARIABLE_HARDWARE_ERROR_RECORD;
+ }
+
+ if ((Attributes & EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS) == EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS) {
+ StrCatS (AttributesStr, AttributesStrSize, L" Auth-WA");
+ Attributes ^= EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS;
+ }
+
+ if ((Attributes & EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS) == EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS) {
+ StrCatS (AttributesStr, AttributesStrSize, L" Auth-TIME-WA");
+ Attributes ^= EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS;
+ }
+
+ if ((Attributes & EFI_VARIABLE_APPEND_WRITE) == EFI_VARIABLE_APPEND_WRITE) {
+ StrCatS (AttributesStr, AttributesStrSize, L" APPEND-W");
+ Attributes ^= EFI_VARIABLE_APPEND_WRITE;
+ }
+
+ if (Attributes != 0) {
+ StrCatS (AttributesStr, AttributesStrSize, L" <Unknown Attribute>");
+ }
+ }
+
+ return EFI_SUCCESS;
+}
+
+/**
+ Prints UEFI variable statistics information.
+
+ @param[in] TotalVariables Total number of UEFI variables discovered.
+ @param[in] TotalVariablesSize Total size of UEFI variables discovered.
+
+**/
+VOID
+PrintStats (
+ IN UINTN TotalVariables,
+ IN UINTN TotalVariablesSize
+ )
+{
+ ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_VAR_POL_STATS_HEADER_1), mVarPolicyShellCommandHiiHandle);
+ ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_VAR_POL_STATS_HEADER_2), mVarPolicyShellCommandHiiHandle);
+ ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_VAR_POL_STATS_HEADER_1), mVarPolicyShellCommandHiiHandle);
+ ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_VAR_POL_STATS_TOTAL_VARS), mVarPolicyShellCommandHiiHandle, TotalVariables);
+ ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_VAR_POL_STATS_TOTAL_SIZE), mVarPolicyShellCommandHiiHandle, TotalVariablesSize, TotalVariablesSize);
+ ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_VAR_POL_STATS_HEADER_1), mVarPolicyShellCommandHiiHandle);
+}
+
+/**
+ Returns information for the given variable namespace if available.
+
+ @param[in] VariableGuid The UEFI variable vendor (namespace) GUID.
+
+ @return Pointer to a namespace info structure on a GUID match.
+ @return NULL on lack of a GUID match.
+
+**/
+CONST VAR_POLICY_CMD_VAR_NAMESPACE *
+GetNameSpaceInfo (
+ IN EFI_GUID *VariableGuid
+ )
+{
+ UINTN Index;
+
+ if (VariableGuid == NULL) {
+ ASSERT (VariableGuid != NULL);
+ return NULL;
+ }
+
+ for (Index = 0; Index < ARRAY_SIZE (mVarNamespaces); Index++) {
+ if (CompareGuid (mVarNamespaces[Index].VendorGuid, VariableGuid)) {
+ return &mVarNamespaces[Index];
+ }
+ }
+
+ return NULL;
+}
+
+/**
+ Print non-verbose information about the variable.
+
+ @param[in] VariableName A pointer the Unicode variable name.
+ @param[in] VariableGuid A pointer to the variable vendor GUID.
+ @param[in] VariableSize The size of the UEFI variable in bytes.
+ @param[in] VariableAttributes The UEFI variable attributes.
+
+ @retval EFI_SUCCESS The non-verbose variable information was printed successfully.
+ @retval EFI_INVALID_PARAMETER A pointer argument passed to the function was NULL.
+ @retval EFI_OUT_OF_RESOURCES Insufficient memory resources to print the attributes.
+
+**/
+EFI_STATUS
+PrintNonVerboseVarInfo (
+ IN CHAR16 *VariableName,
+ IN EFI_GUID *VariableGuid,
+ IN UINTN VariableSize,
+ IN UINT32 VariableAttributes
+ )
+{
+ EFI_STATUS Status;
+ CHAR16 *AttributesStr;
+ CHAR16 *DescriptionStr;
+ CONST VAR_POLICY_CMD_VAR_NAMESPACE *CmdVarNamespace;
+
+ AttributesStr = NULL;
+ DescriptionStr = NULL;
+
+ if ((VariableName == NULL) || (VariableGuid == NULL)) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ CmdVarNamespace = GetNameSpaceInfo (VariableGuid);
+
+ if (CmdVarNamespace == NULL) {
+ DescriptionStr = AllocatePages (1);
+ if (DescriptionStr == NULL) {
+ Status = EFI_OUT_OF_RESOURCES;
+ goto Exit;
+ }
+
+ ZeroMem ((VOID *)DescriptionStr, EFI_PAGES_TO_SIZE (1));
+ UnicodeSPrint (DescriptionStr, EFI_PAGES_TO_SIZE (1), L"Unknown Vendor (%g)", VariableGuid);
+ } else {
+ DescriptionStr = CmdVarNamespace->Description;
+ }
+
+ ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_VAR_POL_VAR_TYPE), mVarPolicyShellCommandHiiHandle, DescriptionStr);
+ ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_VAR_POL_VAR_NAME), mVarPolicyShellCommandHiiHandle, VariableName);
+ ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_VAR_POL_VAR_SIZE), mVarPolicyShellCommandHiiHandle, VariableSize, VariableSize);
+
+ AttributesStr = AllocatePages (1);
+ if (AttributesStr == NULL) {
+ Status = EFI_OUT_OF_RESOURCES;
+ goto Exit;
+ }
+
+ ZeroMem ((VOID *)AttributesStr, EFI_PAGES_TO_SIZE (1));
+ Status = GetAttributesString (VariableAttributes, EFI_PAGES_TO_SIZE (1), AttributesStr);
+ if (Status == EFI_SUCCESS) {
+ ShellPrintHiiEx (
+ -1,
+ -1,
+ NULL,
+ STRING_TOKEN (STR_VAR_POL_VAR_ATTR),
+ mVarPolicyShellCommandHiiHandle,
+ AttributesStr
+ );
+ }
+
+ Status = EFI_SUCCESS;
+
+Exit:
+ if (AttributesStr != NULL) {
+ FreePages (AttributesStr, 1);
+ }
+
+ if ((CmdVarNamespace == NULL) && (DescriptionStr != NULL)) {
+ FreePages (DescriptionStr, 1);
+ }
+
+ return Status;
+}
+
+/**
+ Print verbose information about the variable.
+
+ @param[in] Data A pointer to the variable data buffer.
+ @param[in] DataSize The size of data, in bytes, in the variable data buffer.
+
+ @retval EFI_SUCCESS The verbose variable information was printed successfully.
+ @retval EFI_INVALID_PARAMETER A pointer argument passed to the function was NULL.
+
+**/
+EFI_STATUS
+PrintVerboseVarInfo (
+ IN VOID *Data,
+ IN UINTN DataSize
+ )
+{
+ if ((DataSize == 0) || (Data == NULL)) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ VAR_POLICY_CMD_SHELL_DUMP_HEX (0, Data, DataSize);
+
+ return EFI_SUCCESS;
+}
+
+/**
+ Prints variable policy information for the given variable.
+
+ @param[in] VariableName A pointer to the Unicode string of the UEFI variable name.
+ @param[in] VendorGuid A pointer to the UEFI variable vendor GUID.
+
+ @return TRUE if a variable policy was found and printed for the variable.
+ @return FALSE if an error occurred and/or a variable policy was not found and
+ printed for the variable.
+
+**/
+BOOLEAN
+PrintVariablePolicyInfo (
+ IN CHAR16 *VariableName,
+ IN EFI_GUID *VendorGuid
+ )
+{
+ EFI_STATUS Status;
+ VARIABLE_POLICY_ENTRY VariablePolicyEntry;
+ VARIABLE_LOCK_ON_VAR_STATE_POLICY LockOnVarStatePolicy;
+ UINTN VariablePolicyVariableNameBufferSize;
+ UINTN ReturnedVariableNameSize;
+ BOOLEAN PolicyHeaderPresent;
+ CHAR16 *VariablePolicyVariableName;
+ CHAR16 *VariableAttributesStr;
+ EDKII_VARIABLE_POLICY_PROTOCOL *VariablePolicy;
+
+ PolicyHeaderPresent = FALSE;
+ VariableAttributesStr = NULL;
+ VariablePolicyVariableName = NULL;
+
+ if ((VariableName == NULL) || (VendorGuid == NULL)) {
+ ASSERT ((VariableName != NULL) && (VendorGuid != NULL));
+ ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_VAR_POL_POLICY_INT_ERR), mVarPolicyShellCommandHiiHandle);
+ return FALSE;
+ }
+
+ Status = gBS->LocateProtocol (&gEdkiiVariablePolicyProtocolGuid, NULL, (VOID **)&VariablePolicy);
+ if (EFI_ERROR (Status)) {
+ ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_VAR_POL_POLICY_NO_PROT), mVarPolicyShellCommandHiiHandle);
+ return FALSE;
+ }
+
+ VariablePolicyVariableNameBufferSize = EFI_PAGES_TO_SIZE (1);
+ VariablePolicyVariableName = AllocatePages (EFI_SIZE_TO_PAGES (VariablePolicyVariableNameBufferSize));
+ if (VariablePolicyVariableName == NULL) {
+ Status = EFI_OUT_OF_RESOURCES;
+ ASSERT_EFI_ERROR (Status);
+ goto Done;
+ }
+
+ ZeroMem (VariablePolicyVariableName, VariablePolicyVariableNameBufferSize);
+ ReturnedVariableNameSize = VariablePolicyVariableNameBufferSize;
+ Status = VariablePolicy->GetVariablePolicyInfo (
+ VariableName,
+ VendorGuid,
+ &ReturnedVariableNameSize,
+ &VariablePolicyEntry,
+ VariablePolicyVariableName
+ );
+ if (Status == EFI_NOT_READY) {
+ ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_VAR_POL_POLICY_NOT_INIT), mVarPolicyShellCommandHiiHandle);
+ } else if (Status == EFI_NOT_FOUND) {
+ ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_VAR_POL_POLICY_NOT_FOUND), mVarPolicyShellCommandHiiHandle);
+ } else if (EFI_ERROR (Status)) {
+ // A different error return code is not expected
+ ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_VAR_POL_POLICY_UNEXP_ERR), mVarPolicyShellCommandHiiHandle, Status);
+ } else {
+ PolicyHeaderPresent = TRUE;
+ ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_VAR_POL_POLICY_HEADER_1), mVarPolicyShellCommandHiiHandle);
+ ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_VAR_POL_POLICY_HEADER_2), mVarPolicyShellCommandHiiHandle);
+ ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_VAR_POL_POLICY_HEADER_1), mVarPolicyShellCommandHiiHandle);
+ ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_VAR_POL_POLICY_VERSION), mVarPolicyShellCommandHiiHandle, VariablePolicyEntry.Version);
+
+ if ((ReturnedVariableNameSize > 0) && (VariablePolicyVariableName[0] != CHAR_NULL)) {
+ ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_VAR_POL_POLICY_VARIABLE), mVarPolicyShellCommandHiiHandle, VariablePolicyVariableName);
+ } else {
+ ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_VAR_POL_POLICY_VARIABLE), mVarPolicyShellCommandHiiHandle, L"<Entire Namespace>");
+ }
+
+ ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_VAR_POL_POLICY_NAMESPACE), mVarPolicyShellCommandHiiHandle, &VariablePolicyEntry.Namespace);
+ ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_VAR_POL_POLICY_MIN_SIZE), mVarPolicyShellCommandHiiHandle, VariablePolicyEntry.MinSize);
+ ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_VAR_POL_POLICY_MAX_SIZE), mVarPolicyShellCommandHiiHandle, VariablePolicyEntry.MaxSize);
+
+ switch (VariablePolicyEntry.LockPolicyType) {
+ case VARIABLE_POLICY_TYPE_NO_LOCK:
+ ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_VAR_POL_POLICY_LOCK_TYPE), mVarPolicyShellCommandHiiHandle, L"No Lock");
+ break;
+ case VARIABLE_POLICY_TYPE_LOCK_NOW:
+ ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_VAR_POL_POLICY_LOCK_TYPE), mVarPolicyShellCommandHiiHandle, L"Lock Now");
+ break;
+ case VARIABLE_POLICY_TYPE_LOCK_ON_CREATE:
+ ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_VAR_POL_POLICY_LOCK_TYPE), mVarPolicyShellCommandHiiHandle, L"On Create");
+ break;
+ case VARIABLE_POLICY_TYPE_LOCK_ON_VAR_STATE:
+ ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_VAR_POL_POLICY_LOCK_TYPE), mVarPolicyShellCommandHiiHandle, L"On Variable State");
+
+ ZeroMem (VariablePolicyVariableName, VariablePolicyVariableNameBufferSize);
+ ReturnedVariableNameSize = VariablePolicyVariableNameBufferSize;
+ Status = VariablePolicy->GetLockOnVariableStateVariablePolicyInfo (
+ VariableName,
+ VendorGuid,
+ &ReturnedVariableNameSize,
+ &LockOnVarStatePolicy,
+ VariablePolicyVariableName
+ );
+ if (EFI_ERROR (Status)) {
+ ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_VAR_POL_POLICY_UNEXP_ERR), mVarPolicyShellCommandHiiHandle, Status);
+ goto Done;
+ } else {
+ ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_VAR_POL_POLICY_STATE_NS), mVarPolicyShellCommandHiiHandle, &LockOnVarStatePolicy.Namespace);
+ ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_VAR_POL_POLICY_STATE_VAL), mVarPolicyShellCommandHiiHandle, LockOnVarStatePolicy.Value);
+ if ((ReturnedVariableNameSize > 0) && (VariablePolicyVariableName[0] != CHAR_NULL)) {
+ ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_VAR_POL_POLICY_STATE_NAME), mVarPolicyShellCommandHiiHandle, VariablePolicyVariableName);
+ } else {
+ ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_VAR_POL_POLICY_STATE_NAME), mVarPolicyShellCommandHiiHandle, L"<Entire Namespace>");
+ }
+ }
+
+ break;
+ default:
+ ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_VAR_POL_POLICY_LOCK_TYPE), mVarPolicyShellCommandHiiHandle, L"Unknown");
+ break;
+ }
+
+ VariableAttributesStr = AllocatePages (1);
+ if (VariableAttributesStr == NULL) {
+ Status = EFI_OUT_OF_RESOURCES;
+ ASSERT_EFI_ERROR (Status);
+ goto Done;
+ }
+
+ ZeroMem (VariableAttributesStr, EFI_PAGES_TO_SIZE (1));
+ Status = GetAttributesString (VariablePolicyEntry.AttributesMustHave, EFI_PAGES_TO_SIZE (1), VariableAttributesStr);
+ if (Status == EFI_SUCCESS) {
+ ShellPrintHiiEx (
+ -1,
+ -1,
+ NULL,
+ STRING_TOKEN (STR_VAR_POL_POLICY_ATTR_MUST),
+ mVarPolicyShellCommandHiiHandle
+ );
+ ShellPrintHiiEx (
+ -1,
+ -1,
+ NULL,
+ STRING_TOKEN (STR_VAR_POL_POLICY_ATTR_GEN),
+ mVarPolicyShellCommandHiiHandle,
+ VariableAttributesStr
+ );
+ }
+
+ ZeroMem (VariableAttributesStr, EFI_PAGES_TO_SIZE (1));
+ Status = GetAttributesString (VariablePolicyEntry.AttributesCantHave, EFI_PAGES_TO_SIZE (1), VariableAttributesStr);
+ if (Status == EFI_SUCCESS) {
+ ShellPrintHiiEx (
+ -1,
+ -1,
+ NULL,
+ STRING_TOKEN (STR_VAR_POL_POLICY_ATTR_NOT),
+ mVarPolicyShellCommandHiiHandle
+ );
+ ShellPrintHiiEx (
+ -1,
+ -1,
+ NULL,
+ STRING_TOKEN (STR_VAR_POL_POLICY_ATTR_GEN),
+ mVarPolicyShellCommandHiiHandle,
+ VariableAttributesStr
+ );
+ }
+ }
+
+Done:
+ if (PolicyHeaderPresent) {
+ ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_VAR_POL_POLICY_HEADER_1), mVarPolicyShellCommandHiiHandle);
+ }
+
+ if (VariableAttributesStr != NULL) {
+ FreePages (VariableAttributesStr, 1);
+ }
+
+ if (VariablePolicyVariableName != NULL) {
+ FreePages (VariablePolicyVariableName, 1);
+ }
+
+ ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_GEN_LINE_BREAK), mVarPolicyShellCommandHiiHandle);
+
+ return Status == EFI_SUCCESS;
+}
+
+/**
+ Gets the next UEFI variable name.
+
+ This buffer manages the UEFI variable name buffer, performing memory reallocations as necessary.
+
+ Note: The first time this function is called, VariableNameBufferSize must be 0 and
+ the VariableName buffer pointer must point to NULL.
+
+ @param[in,out] VariableNameBufferSize On input, a pointer to a buffer that holds the current
+ size of the VariableName buffer in bytes.
+ On output, a pointer to a buffer that holds the updated
+ size of the VariableName buffer in bytes.
+ @param[in,out] VariableName On input, a pointer to a pointer to a buffer that holds the
+ current UEFI variable name.
+ On output, a pointer to a pointer to a buffer that holds the
+ next UEFI variable name.
+ @param[in,out] VariableGuid On input, a pointer to a buffer that holds the current UEFI
+ variable GUID.
+ On output, a pointer to a buffer that holds the next UEFI
+ variable GUID.
+
+ @retval EFI_SUCCESS The next UEFI variable name was found successfully.
+ @retval EFI_INVALID_PARAMETER A pointer argument is NULL or initial input values are invalid.
+ @retval EFI_OUT_OF_RESOURCES Insufficient memory resources to allocate a required buffer.
+ @retval Others Return status codes from the UEFI spec define GetNextVariableName() interface.
+
+**/
+EFI_STATUS
+GetNextVariableNameWithDynamicReallocation (
+ IN OUT UINTN *VariableNameBufferSize,
+ IN OUT CHAR16 **VariableName,
+ IN OUT EFI_GUID *VariableGuid
+ )
+{
+ EFI_STATUS Status;
+ UINTN NextVariableNameBufferSize;
+
+ if ((VariableNameBufferSize == NULL) || (VariableName == NULL) || (VariableGuid == NULL)) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (*VariableNameBufferSize == 0) {
+ if (*VariableName != NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ //
+ // Allocate a buffer to temporarily hold variable names. To reduce memory
+ // allocations, the default buffer size is 256 characters. The buffer can
+ // be reallocated if expansion is necessary (should be very rare).
+ //
+ *VariableNameBufferSize = sizeof (CHAR16) * 256;
+ *VariableName = AllocateZeroPool (*VariableNameBufferSize);
+ if (*VariableName == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ ZeroMem ((VOID *)VariableGuid, sizeof (EFI_GUID));
+ }
+
+ NextVariableNameBufferSize = *VariableNameBufferSize;
+ Status = gRT->GetNextVariableName (
+ &NextVariableNameBufferSize,
+ *VariableName,
+ VariableGuid
+ );
+ if (Status == EFI_BUFFER_TOO_SMALL) {
+ *VariableName = ReallocatePool (
+ *VariableNameBufferSize,
+ NextVariableNameBufferSize,
+ *VariableName
+ );
+ if (*VariableName == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ *VariableNameBufferSize = NextVariableNameBufferSize;
+
+ Status = gRT->GetNextVariableName (
+ &NextVariableNameBufferSize,
+ *VariableName,
+ VariableGuid
+ );
+ ASSERT (Status != EFI_BUFFER_TOO_SMALL);
+ }
+
+ return Status;
+}
+
+/**
+ Dumps UEFI variable information.
+
+ This is the main function that enumerates UEFI variables and prints the information
+ selected by the user.
+
+ @param[in] Verbose Whether to print verbose information.
+ @param[in] Stats Whether to print statistical information.
+ @param[in] PolicyCheck Whether to print variable policy related information.
+
+
+ @retval EFI_SUCCESS The UEFI variable information was dumped successfully.
+ @retval EFI_DEVICE_ERROR An error occurred attempting to get UEFI variable information.
+ @retval EFI_OUT_OF_RESOURCES Insufficient memory resources to allocate a required buffer.
+
+**/
+EFI_STATUS
+DumpVars (
+ IN BOOLEAN Verbose,
+ IN BOOLEAN Stats,
+ IN BOOLEAN PolicyCheck
+ )
+{
+ EFI_STATUS Status;
+ EFI_STATUS GetNextVariableStatus;
+ UINT32 Attributes;
+ UINTN CurrentVariableDataBufferSize;
+ UINTN DataSize;
+ UINTN TotalDataSize;
+ UINTN TotalVariables;
+ UINTN TotalVariablesWithPolicy;
+ UINTN VariableNameBufferSize;
+ EFI_GUID VariableGuid;
+ CHAR16 *VariableName;
+ VOID *Data;
+
+ Status = EFI_SUCCESS;
+ Data = NULL;
+ VariableName = NULL;
+ CurrentVariableDataBufferSize = 0;
+ TotalDataSize = 0;
+ TotalVariables = 0;
+ TotalVariablesWithPolicy = 0;
+ VariableNameBufferSize = 0;
+
+ do {
+ GetNextVariableStatus = GetNextVariableNameWithDynamicReallocation (
+ &VariableNameBufferSize,
+ &VariableName,
+ &VariableGuid
+ );
+
+ if (!EFI_ERROR (GetNextVariableStatus)) {
+ DataSize = 0;
+ Status = gRT->GetVariable (
+ VariableName,
+ &VariableGuid,
+ &Attributes,
+ &DataSize,
+ NULL
+ );
+ if (Status != EFI_BUFFER_TOO_SMALL) {
+ // If the variable exists, a zero size buffer should be too small
+ Status = EFI_DEVICE_ERROR;
+ goto DeallocateAndExit;
+ }
+
+ TotalDataSize += DataSize;
+ TotalVariables++;
+
+ if (!Stats || Verbose) {
+ Status = PrintNonVerboseVarInfo (VariableName, &VariableGuid, DataSize, Attributes);
+ if (!EFI_ERROR (Status)) {
+ ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_GEN_LINE_BREAK), mVarPolicyShellCommandHiiHandle);
+ }
+ }
+
+ if (PolicyCheck || Verbose) {
+ if (PrintVariablePolicyInfo (VariableName, &VariableGuid)) {
+ TotalVariablesWithPolicy++;
+ }
+ }
+
+ if (Verbose) {
+ if (CurrentVariableDataBufferSize < DataSize) {
+ if (Data != NULL) {
+ FreePool (Data);
+ }
+
+ Data = AllocateZeroPool (DataSize);
+ if (Data == NULL) {
+ Status = EFI_OUT_OF_RESOURCES;
+ goto DeallocateAndExit;
+ }
+
+ CurrentVariableDataBufferSize = DataSize;
+ }
+
+ Status = gRT->GetVariable (
+ VariableName,
+ &VariableGuid,
+ NULL,
+ &DataSize,
+ Data
+ );
+ if (EFI_ERROR (Status)) {
+ Status = EFI_DEVICE_ERROR;
+ goto DeallocateAndExit;
+ }
+
+ Status = PrintVerboseVarInfo (Data, DataSize);
+ if (EFI_ERROR (Status)) {
+ Status = EFI_DEVICE_ERROR;
+ goto DeallocateAndExit;
+ }
+ }
+ }
+ } while (!EFI_ERROR (GetNextVariableStatus));
+
+ if (TotalVariables == 0) {
+ ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_GEN_NO_VARS), mVarPolicyShellCommandHiiHandle);
+ } else {
+ if (Verbose || Stats) {
+ PrintStats (TotalVariables, TotalDataSize);
+ }
+
+ if (Verbose || PolicyCheck) {
+ ASSERT (TotalVariablesWithPolicy <= TotalVariables);
+
+ ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_GEN_LINE_BREAK), mVarPolicyShellCommandHiiHandle);
+ if (TotalVariablesWithPolicy == TotalVariables) {
+ ShellPrintHiiEx (
+ -1,
+ -1,
+ NULL,
+ STRING_TOKEN (STR_VAR_POL_POLICY_STATS_PASS),
+ mVarPolicyShellCommandHiiHandle,
+ TotalVariablesWithPolicy,
+ TotalVariables
+ );
+ } else {
+ ShellPrintHiiEx (
+ -1,
+ -1,
+ NULL,
+ STRING_TOKEN (STR_VAR_POL_POLICY_STATS_FAIL),
+ mVarPolicyShellCommandHiiHandle,
+ TotalVariablesWithPolicy,
+ TotalVariables
+ );
+ }
+
+ ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_GEN_LINE_BREAK), mVarPolicyShellCommandHiiHandle);
+ }
+ }
+
+ Status = EFI_SUCCESS;
+
+DeallocateAndExit:
+ if (VariableName != NULL) {
+ FreePool (VariableName);
+ }
+
+ if (Data != NULL) {
+ FreePool (Data);
+ }
+
+ ASSERT_EFI_ERROR (Status);
+
+ return Status;
+}
+
+/**
+ Main entry function for the "varpolicy" command.
+
+ @param[in] ImageHandle Handle to the Image (NULL if Internal).
+ @param[in] SystemTable Pointer to the System Table (NULL if Internal).
+
+ @retval SHELL_SUCCESS The "varpolicy" shell command executed successfully.
+ @retval SHELL_INVALID_PARAMETER An argument passed to the shell command is invalid.
+ @retval Others A different error occurred.
+
+**/
+SHELL_STATUS
+EFIAPI
+ShellCommandRunVarPolicy (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ EFI_STATUS Status;
+ SHELL_STATUS ShellStatus;
+ BOOLEAN PolicyCheck;
+ BOOLEAN StatsDump;
+ BOOLEAN VerboseDump;
+ LIST_ENTRY *Package;
+ CHAR16 *ProblemParam;
+
+ Package = NULL;
+ ShellStatus = SHELL_INVALID_PARAMETER;
+ Status = EFI_SUCCESS;
+ PolicyCheck = FALSE;
+ StatsDump = FALSE;
+ VerboseDump = FALSE;
+
+ Status = ShellInitialize ();
+ ASSERT_EFI_ERROR (Status);
+
+ Status = ShellCommandLineParse (ParamList, &Package, &ProblemParam, TRUE);
+ if (EFI_ERROR (Status)) {
+ if ((Status == EFI_VOLUME_CORRUPTED) && (ProblemParam != NULL)) {
+ ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_GEN_PROBLEM), mVarPolicyShellCommandHiiHandle, VAR_POLICY_COMMAND_NAME, ProblemParam);
+ FreePool (ProblemParam);
+ ShellStatus = SHELL_INVALID_PARAMETER;
+ goto Done;
+ } else {
+ ASSERT (FALSE);
+ }
+ } else {
+ if (ShellCommandLineGetCount (Package) > 1) {
+ ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_MANY), mVarPolicyShellCommandHiiHandle, VAR_POLICY_COMMAND_NAME);
+ ShellStatus = SHELL_INVALID_PARAMETER;
+ goto Done;
+ }
+
+ PolicyCheck = ShellCommandLineGetFlag (Package, VAR_POLICY_FLAG_POLICY_STR);
+ StatsDump = ShellCommandLineGetFlag (Package, VAR_POLICY_FLAG_STATS_STR);
+ VerboseDump = ShellCommandLineGetFlag (Package, VAR_POLICY_FLAG_VERBOSE_STR);
+
+ Status = DumpVars (VerboseDump, StatsDump, PolicyCheck);
+ ASSERT_EFI_ERROR (Status);
+ }
+
+Done:
+ if (Package != NULL) {
+ ShellCommandLineFreeVarList (Package);
+ }
+
+ return ShellStatus;
+}
+
+/**
+ This is the shell command handler function pointer callback type.
+
+ This function handles the command when it is invoked in the shell.
+
+ @param[in] This The instance of the
+ EFI_SHELL_DYNAMIC_COMMAND_PROTOCOL.
+ @param[in] SystemTable The pointer to the system table.
+ @param[in] ShellParameters The parameters associated with the command.
+ @param[in] Shell The instance of the shell protocol used in
+ the context of processing this command.
+
+ @return EFI_SUCCESS the operation was successful
+ @return other the operation failed.
+
+**/
+SHELL_STATUS
+EFIAPI
+VarPolicyCommandHandler (
+ IN EFI_SHELL_DYNAMIC_COMMAND_PROTOCOL *This,
+ IN EFI_SYSTEM_TABLE *SystemTable,
+ IN EFI_SHELL_PARAMETERS_PROTOCOL *ShellParameters,
+ IN EFI_SHELL_PROTOCOL *Shell
+ )
+{
+ gEfiShellParametersProtocol = ShellParameters;
+ gEfiShellProtocol = Shell;
+
+ return ShellCommandRunVarPolicy (gImageHandle, SystemTable);
+}
+
+/**
+ This is the command help handler function pointer callback type. This
+ function is responsible for displaying help information for the associated
+ command.
+
+ @param[in] This The instance of the
+ EFI_SHELL_DYNAMIC_COMMAND_PROTOCOL.
+ @param[in] Language The pointer to the language string to use.
+
+ @return string Pool allocated help string, must be freed
+ by caller.
+
+**/
+STATIC
+CHAR16 *
+EFIAPI
+VarPolicyCommandGetHelp (
+ IN EFI_SHELL_DYNAMIC_COMMAND_PROTOCOL *This,
+ IN CONST CHAR8 *Language
+ )
+{
+ return HiiGetString (
+ mVarPolicyShellCommandHiiHandle,
+ STRING_TOKEN (STR_GET_HELP_VAR_POLICY),
+ Language
+ );
+}
+
+STATIC EFI_SHELL_DYNAMIC_COMMAND_PROTOCOL mVarPolicyDynamicCommand = {
+ VAR_POLICY_COMMAND_NAME,
+ VarPolicyCommandHandler,
+ VarPolicyCommandGetHelp
+};
+
+/**
+ Retrieve HII package list from ImageHandle and publish to HII database.
+
+ @param[in] ImageHandle The image handle of the process.
+
+ @return HII handle.
+
+**/
+STATIC
+EFI_HII_HANDLE
+InitializeHiiPackage (
+ IN EFI_HANDLE ImageHandle
+ )
+{
+ EFI_STATUS Status;
+ EFI_HII_PACKAGE_LIST_HEADER *PackageList;
+ EFI_HII_HANDLE HiiHandle;
+
+ //
+ // Retrieve HII package list from ImageHandle
+ //
+ Status = gBS->OpenProtocol (
+ ImageHandle,
+ &gEfiHiiPackageListProtocolGuid,
+ (VOID **)&PackageList,
+ ImageHandle,
+ NULL,
+ EFI_OPEN_PROTOCOL_GET_PROTOCOL
+ );
+ ASSERT_EFI_ERROR (Status);
+ if (EFI_ERROR (Status)) {
+ return NULL;
+ }
+
+ //
+ // Publish HII package list to HII Database.
+ //
+ Status = gHiiDatabase->NewPackageList (
+ gHiiDatabase,
+ PackageList,
+ NULL,
+ &HiiHandle
+ );
+ ASSERT_EFI_ERROR (Status);
+ if (EFI_ERROR (Status)) {
+ return NULL;
+ }
+
+ return HiiHandle;
+}
+
+/**
+ Entry point of the UEFI variable policy dynamic shell command.
+
+ Produce the Dynamic Command Protocol to handle the "varpolicy" command.
+
+ @param[in] ImageHandle The image handle of the process.
+ @param[in] SystemTable The EFI System Table pointer.
+
+ @retval EFI_SUCCESS The "varpolicy" command executed successfully.
+ @retval EFI_ABORTED HII package failed to initialize.
+ @retval others Other errors when executing "varpolicy" command.
+
+**/
+EFI_STATUS
+EFIAPI
+VariablePolicyDynamicCommandEntryPoint (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ EFI_STATUS Status;
+
+ mVarPolicyShellCommandHiiHandle = InitializeHiiPackage (ImageHandle);
+ if (mVarPolicyShellCommandHiiHandle == NULL) {
+ return EFI_ABORTED;
+ }
+
+ Status = gBS->InstallProtocolInterface (
+ &ImageHandle,
+ &gEfiShellDynamicCommandProtocolGuid,
+ EFI_NATIVE_INTERFACE,
+ &mVarPolicyDynamicCommand
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ return Status;
+}
+
+/**
+ Unload the dynamic "varpolicy" UEFI Shell command.
+
+ @param[in] ImageHandle The image handle of the process.
+
+ @retval EFI_SUCCESS The image is unloaded.
+ @retval Others Failed to unload the image.
+
+**/
+EFI_STATUS
+EFIAPI
+VariablePolicyDynamicCommandUnload (
+ IN EFI_HANDLE ImageHandle
+ )
+{
+ EFI_STATUS Status;
+
+ Status = gBS->UninstallProtocolInterface (
+ ImageHandle,
+ &gEfiShellDynamicCommandProtocolGuid,
+ &mVarPolicyDynamicCommand
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ HiiRemovePackages (mVarPolicyShellCommandHiiHandle);
+
+ return EFI_SUCCESS;
+}
diff --git a/ShellPkg/DynamicCommand/VariablePolicyDynamicCommand/VariablePolicyDynamicCommand.h b/ShellPkg/DynamicCommand/VariablePolicyDynamicCommand/VariablePolicyDynamicCommand.h
new file mode 100644
index 000000000000..7ce5beca389a
--- /dev/null
+++ b/ShellPkg/DynamicCommand/VariablePolicyDynamicCommand/VariablePolicyDynamicCommand.h
@@ -0,0 +1,94 @@
+/** @file
+ Internal header file for the module.
+
+ Copyright (c) Microsoft Corporation.
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef VAR_POLICY_DYNAMIC_SHELL_COMMAND_H_
+#define VAR_POLICY_DYNAMIC_SHELL_COMMAND_H_
+
+#include <Uefi.h>
+
+#define VAR_POLICY_COMMAND_NAME L"varpolicy"
+
+typedef enum {
+ VariableVendorCapsule,
+ VariableVendorCapsuleReport,
+ VariableVendorGlobal,
+ VariableVendorMorControl,
+ VariableVendorGuidMax
+} VAR_POLICY_CMD_VENDOR_GUID_TYPE;
+
+typedef struct {
+ VAR_POLICY_CMD_VENDOR_GUID_TYPE VendorGuidType;
+ EFI_GUID *VendorGuid;
+ CHAR16 *Description;
+} VAR_POLICY_CMD_VAR_NAMESPACE;
+
+/**
+ Log a formatted console message.
+
+ This is not specific to this shell command but scoped so to prevent global
+ name conflicts.
+
+ The hex dump is split into lines of 16 dumped bytes.
+
+ The full hex dump is bracketed, and its byte ascii char also print.
+ If the byte value is not an ascii code, it will print as '.'
+
+ @param[in] Offset Offset to be display after PrefixFormat.
+ Offset will be increased for each print line.
+ @param[in] Data The data to dump.
+ @param[in] DataSize Number of bytes in Data.
+
+**/
+#define VAR_POLICY_CMD_SHELL_DUMP_HEX(Offset, \
+ Data, \
+ DataSize \
+ ) \
+ { \
+ UINT8 *_DataToDump; \
+ UINT8 _Val[50]; \
+ UINT8 _Str[20]; \
+ UINT8 _TempByte; \
+ UINTN _Size; \
+ UINTN _DumpHexIndex; \
+ UINTN _LocalOffset; \
+ UINTN _LocalDataSize; \
+ CONST CHAR8 *_Hex = "0123456789ABCDEF"; \
+ _LocalOffset = (Offset); \
+ _LocalDataSize = (DataSize); \
+ _DataToDump = (UINT8 *)(Data); \
+ \
+ ASSERT (_DataToDump != NULL); \
+ \
+ while (_LocalDataSize != 0) { \
+ _Size = 16; \
+ if (_Size > _LocalDataSize) { \
+ _Size = _LocalDataSize; \
+ } \
+ \
+ for (_DumpHexIndex = 0; _DumpHexIndex < _Size; _DumpHexIndex += 1) { \
+ _TempByte = (UINT8) _DataToDump[_DumpHexIndex]; \
+ _Val[_DumpHexIndex * 3 + 0] = (UINT8) _Hex[_TempByte >> 4]; \
+ _Val[_DumpHexIndex * 3 + 1] = (UINT8) _Hex[_TempByte & 0xF]; \
+ _Val[_DumpHexIndex * 3 + 2] = \
+ (CHAR8) ((_DumpHexIndex == 7) ? '-' : ' '); \
+ _Str[_DumpHexIndex] = \
+ (CHAR8) ((_TempByte < ' ' || _TempByte > '~') ? '.' : _TempByte); \
+ } \
+ \
+ _Val[_DumpHexIndex * 3] = 0; \
+ _Str[_DumpHexIndex] = 0; \
+ \
+ ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_GEN_HEX_DUMP_LINE), mVarPolicyShellCommandHiiHandle, _LocalOffset, _Val, _Str); \
+ _DataToDump = (UINT8 *)(((UINTN)_DataToDump) + _Size); \
+ _LocalOffset += _Size; \
+ _LocalDataSize -= _Size; \
+ } \
+ ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_GEN_LINE_BREAK), mVarPolicyShellCommandHiiHandle); \
+ }
+
+#endif
diff --git a/ShellPkg/DynamicCommand/VariablePolicyDynamicCommand/VariablePolicyDynamicCommand.inf b/ShellPkg/DynamicCommand/VariablePolicyDynamicCommand/VariablePolicyDynamicCommand.inf
new file mode 100644
index 000000000000..22b4baa5e6f2
--- /dev/null
+++ b/ShellPkg/DynamicCommand/VariablePolicyDynamicCommand/VariablePolicyDynamicCommand.inf
@@ -0,0 +1,56 @@
+## @file
+# A UEFI variable policy dynamic shell command that displays information
+# about UEFI variable policy configuration on the system.
+#
+# Copyright (c) Microsoft Corporation.
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+[Defines]
+ INF_VERSION = 1.27
+ BASE_NAME = VariablePolicyDynamicCommand
+ FILE_GUID = 17D0EF2A-5933-4007-8950-5749169D3DC5
+ MODULE_TYPE = DXE_DRIVER
+ VERSION_STRING = 1.0
+ ENTRY_POINT = VariablePolicyDynamicCommandEntryPoint
+ UNLOAD_IMAGE = VariablePolicyDynamicCommandUnload
+ UEFI_HII_RESOURCE_SECTION = TRUE
+
+[Sources.common]
+ VariablePolicyDynamicCommand.c
+ VariablePolicyDynamicCommand.h
+ VariablePolicyDynamicCommand.uni
+
+[Packages]
+ MdePkg/MdePkg.dec
+ MdeModulePkg/MdeModulePkg.dec
+ ShellPkg/ShellPkg.dec
+
+[LibraryClasses]
+ BaseLib
+ BaseMemoryLib
+ DebugLib
+ HiiLib
+ MemoryAllocationLib
+ PrintLib
+ ShellLib
+ UefiBootServicesTableLib
+ UefiDriverEntryPoint
+ UefiHiiServicesLib
+ UefiRuntimeServicesTableLib
+
+[Protocols]
+ gEdkiiVariablePolicyProtocolGuid ## SOMETIMES_CONSUMES
+ gEfiHiiPackageListProtocolGuid ## CONSUMES
+ gEfiShellDynamicCommandProtocolGuid ## PRODUCES
+
+[Guids]
+ ## SOMETIMES_CONSUMES ## Variables in Vendor Namespace
+ gEfiCapsuleReportGuid
+ gEfiCapsuleVendorGuid
+ gEfiGlobalVariableGuid
+ gEfiMemoryOverwriteRequestControlLockGuid
+
+[DEPEX]
+ TRUE
diff --git a/ShellPkg/DynamicCommand/VariablePolicyDynamicCommand/VariablePolicyDynamicCommand.uni b/ShellPkg/DynamicCommand/VariablePolicyDynamicCommand/VariablePolicyDynamicCommand.uni
new file mode 100644
index 000000000000..a65f477b41c3
--- /dev/null
+++ b/ShellPkg/DynamicCommand/VariablePolicyDynamicCommand/VariablePolicyDynamicCommand.uni
@@ -0,0 +1,86 @@
+// /**
+// String definitions for the Variable Policy ("varpolicy") shell command.
+//
+// Copyright (c) Microsoft Corporation.
+// SPDX-License-Identifier: BSD-2-Clause-Patent
+//
+// **/
+
+/=#
+
+#langdef en-US "english"
+
+// General Strings
+#string STR_GEN_PROBLEM #language en-US "%H%s%N: Unknown flag - '%H%s%N'\r\n"
+#string STR_GEN_TOO_MANY #language en-US "%H%s%N: Too many arguments.\r\n"
+#string STR_GEN_NO_VARS #language en-US "No UEFI variables found!\r\n"
+#string STR_GEN_LINE_BREAK #language en-US "\r\n"
+
+#string STR_GEN_HEX_DUMP_LINE #language en-US "%B%08X%N: %-48a %V*%a*%N\r\n"
+
+#string STR_VAR_POL_POLICY_INT_ERR #language en-US "%EInternal Application Error Getting Policy Info!%N\r\n"
+#string STR_VAR_POL_POLICY_NO_PROT #language en-US "%EVariable Policy Protocol Was Not Found!%N\r\n"
+#string STR_VAR_POL_POLICY_NOT_INIT #language en-US "%EUEFI Variable Policy is Not Initialized!%N\r\n"
+#string STR_VAR_POL_POLICY_NOT_FOUND #language en-US "%EVariable Policy Not Found for This Variable!%N\r\n"
+#string STR_VAR_POL_POLICY_UNEXP_ERR #language en-US "%EUnexpected Error Getting Policy Info!%N - %H%r%N\r\n"
+#string STR_VAR_POL_POLICY_HEADER_1 #language en-US "+-----------------------------------------------------------------------------+\r\n"
+#string STR_VAR_POL_POLICY_HEADER_2 #language en-US "| Variable Policy Info |\r\n"
+#string STR_VAR_POL_POLICY_VERSION #language en-US "| Version: 0x%-8x |\r\n"
+#string STR_VAR_POL_POLICY_VARIABLE #language en-US "| Variable: % -64s |\r\n"
+#string STR_VAR_POL_POLICY_NAMESPACE #language en-US "| Namespace: {%g} |\r\n"
+#string STR_VAR_POL_POLICY_MIN_SIZE #language en-US "| Minimum Size: 0x%-8x |\r\n"
+#string STR_VAR_POL_POLICY_MAX_SIZE #language en-US "| Maximum Size: 0x%-8x |\r\n"
+#string STR_VAR_POL_POLICY_ATTR_MUST #language en-US "| Required Attributes: |\r\n"
+#string STR_VAR_POL_POLICY_ATTR_NOT #language en-US "| Disallowed Attributes: |\r\n"
+#string STR_VAR_POL_POLICY_ATTR_GEN #language en-US "| %73-.73s |\r\n"
+#string STR_VAR_POL_POLICY_LOCK_TYPE #language en-US "| Lock Type: % -64s |\r\n"
+#string STR_VAR_POL_POLICY_STATE_NS #language en-US "| Namespace: {%g} |\r\n"
+#string STR_VAR_POL_POLICY_STATE_VAL #language en-US "| Value: 0x%-8x |\r\n"
+#string STR_VAR_POL_POLICY_STATE_NAME #language en-US "| Name: % -64s |\r\n"
+#string STR_VAR_POL_POLICY_STATS_PASS #language en-US " %V%d/%d UEFI variables have policy%N\r\n"
+#string STR_VAR_POL_POLICY_STATS_FAIL #language en-US " %E%d/%d UEFI variables have policy%N\r\n"
+
+#string STR_VAR_POL_VAR_TYPE #language en-US "%H% -70s%N\r\n"
+#string STR_VAR_POL_VAR_NAME #language en-US "Name: % -70s\r\n"
+#string STR_VAR_POL_VAR_SIZE #language en-US "Size: 0x%-16x (%-,d) bytes\r\n"
+#string STR_VAR_POL_VAR_ATTR #language en-US "Attributes: % -60s\r\n"
+
+#string STR_VAR_POL_STATS_HEADER_1 #language en-US "+----------------------------------------------------------------+\r\n"
+#string STR_VAR_POL_STATS_HEADER_2 #language en-US "| UEFI Variable Statistics |\r\n"
+#string STR_VAR_POL_STATS_TOTAL_VARS #language en-US " Total UEFI Variables: %,d\r\n"
+#string STR_VAR_POL_STATS_TOTAL_SIZE #language en-US " Total UEFI Variable Size: 0x%x (%,d) bytes\r\n"
+
+#string STR_GET_HELP_VAR_POLICY #language en-US ""
+".TH varpolicy 0 "Lists UEFI variable policy information."\r\n"
+".SH NAME\r\n"
+"Lists UEFI variable policy information.\r\n"
+".SH SYNOPSIS\r\n"
+" \r\n"
+"VARPOLICY [-p] [-s] [-v]\r\n"
+".SH OPTIONS\r\n"
+" \r\n"
+" -p - The policy flag will print variable policy info for each variable.\r\n"
+" \r\n"
+" -s - The stats flag will print overall UEFI variable policy statistics.\r\n"
+" \r\n"
+" -v - The verbose flag indicates all known information should be printed.\r\n"
+" \r\n"
+" This includes a dump of the corresponding UEFI variable data in\r\n"
+" addition to all other UEFI variable policy information.\r\n"
+".SH DESCRIPTION\r\n"
+" \r\n"
+".SH EXAMPLES\r\n"
+" \r\n"
+"EXAMPLES:\r\n"
+" * To dump all active UEFI variables:\r\n"
+" fs0:\> varpolicy\r\n"
+"\r\n"
+" * To include UEFI variable policy information:\r\n"
+" fs0:\> varpolicy -p\r\n"
+"\r\n"
+" * To include UEFI variable statistics:\r\n"
+" fs0:\> varpolicy -s\r\n"
+"\r\n"
+" * To include a hexadecimal dump of data for each variable\r\n"
+" and all other variable information:\r\n"
+" fs0:\> varpolicy -v\r\n"
diff --git a/ShellPkg/ShellPkg.dsc b/ShellPkg/ShellPkg.dsc
index dd0d88603f11..c0a8a8f12bd5 100644
--- a/ShellPkg/ShellPkg.dsc
+++ b/ShellPkg/ShellPkg.dsc
@@ -154,6 +154,7 @@ [Components]
gEfiShellPkgTokenSpaceGuid.PcdShellLibAutoInitialize|FALSE
}
ShellPkg/DynamicCommand/DpDynamicCommand/DpApp.inf
+ ShellPkg/DynamicCommand/VariablePolicyDynamicCommand/VariablePolicyDynamicCommand.inf
ShellPkg/Application/AcpiViewApp/AcpiViewApp.inf
[BuildOptions]
--
2.42.0.windows.2
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