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authorArd Biesheuvel <ard.biesheuvel@linaro.org>2020-02-26 20:05:08 +0100
committermergify[bot] <37929162+mergify[bot]@users.noreply.github.com>2020-03-04 08:48:09 +0000
commit82662a3b5f56e974afe54b32014723de62ebe1a1 (patch)
tree24b3f373c5d5434ddd55a592ee3c80993d32f741 /ArmVirtPkg
parentfdb3f06b8287a33166c6796e3c83499fc220a491 (diff)
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ArmVirtPkg/PlatformPeiLib: discover the TPM base address from the DT
Introduce a boolean PCD that tells us whether TPM support is enabled in the build, and if it is, record the TPM base address in the existing routine that traverses the device tree in the platform PEIM. If a TPM is found, install the gOvmfTpmDiscoveredPpiGuid signalling PPI that will unlock the dispatch of OvmfPkg's Tcg2ConfigPei. If TPM2 support is enabled in the build but no TPM2 device is found, install the gPeiTpmInitializationDonePpiGuid PPI, which is normally installed by Tcg2ConfigPei if no TPM2 is found, but in our case Tcg2ConfigPei will never run so let's do it here instead. Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=2560 Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Acked-by: Laszlo Ersek <lersek@redhat.com>
Diffstat (limited to 'ArmVirtPkg')
-rw-r--r--ArmVirtPkg/ArmVirtPkg.dec6
-rw-r--r--ArmVirtPkg/ArmVirtQemu.dsc5
-rw-r--r--ArmVirtPkg/ArmVirtQemuKernel.dsc6
-rw-r--r--ArmVirtPkg/ArmVirtXen.dsc6
-rw-r--r--ArmVirtPkg/Library/PlatformPeiLib/PlatformPeiLib.c101
-rw-r--r--ArmVirtPkg/Library/PlatformPeiLib/PlatformPeiLib.inf19
6 files changed, 129 insertions, 14 deletions
diff --git a/ArmVirtPkg/ArmVirtPkg.dec b/ArmVirtPkg/ArmVirtPkg.dec
index a019cc269d..08ddd68a86 100644
--- a/ArmVirtPkg/ArmVirtPkg.dec
+++ b/ArmVirtPkg/ArmVirtPkg.dec
@@ -36,6 +36,12 @@
[Protocols]
gFdtClientProtocolGuid = { 0xE11FACA0, 0x4710, 0x4C8E, { 0xA7, 0xA2, 0x01, 0xBA, 0xA2, 0x59, 0x1B, 0x4C } }
+[PcdsFeatureFlag]
+ #
+ # Feature Flag PCD that defines whether TPM2 support is enabled
+ #
+ gArmVirtTokenSpaceGuid.PcdTpm2SupportEnabled|FALSE|BOOLEAN|0x00000004
+
[PcdsFixedAtBuild, PcdsPatchableInModule]
#
# This is the physical address where the device tree is expected to be stored
diff --git a/ArmVirtPkg/ArmVirtQemu.dsc b/ArmVirtPkg/ArmVirtQemu.dsc
index 7ae6702ac1..7d05415d0f 100644
--- a/ArmVirtPkg/ArmVirtQemu.dsc
+++ b/ArmVirtPkg/ArmVirtQemu.dsc
@@ -237,6 +237,11 @@
gEfiMdeModulePkgTokenSpaceGuid.PcdSmbiosDocRev|0x0
gUefiOvmfPkgTokenSpaceGuid.PcdQemuSmbiosValidated|FALSE
+ #
+ # TPM2 support
+ #
+ gEfiSecurityPkgTokenSpaceGuid.PcdTpmBaseAddress|0x0
+
[PcdsDynamicHii]
gArmVirtTokenSpaceGuid.PcdForceNoAcpi|L"ForceNoAcpi"|gArmVirtVariableGuid|0x0|FALSE|NV,BS
diff --git a/ArmVirtPkg/ArmVirtQemuKernel.dsc b/ArmVirtPkg/ArmVirtQemuKernel.dsc
index 3b0f04967a..720f8fa78b 100644
--- a/ArmVirtPkg/ArmVirtQemuKernel.dsc
+++ b/ArmVirtPkg/ArmVirtQemuKernel.dsc
@@ -172,6 +172,12 @@
gEfiMdePkgTokenSpaceGuid.PcdReportStatusCodePropertyMask|3
[PcdsPatchableInModule.common]
+ # we need to provide a resolution for this PCD that supports PcdSet64()
+ # being called from ArmVirtPkg/Library/PlatformPeiLib/PlatformPeiLib.c,
+ # even though that call will be compiled out on this platform as it does
+ # not (and cannot) support the TPM2 driver stack
+ gEfiSecurityPkgTokenSpaceGuid.PcdTpmBaseAddress|0x0
+
#
# This will be overridden in the code
#
diff --git a/ArmVirtPkg/ArmVirtXen.dsc b/ArmVirtPkg/ArmVirtXen.dsc
index 1b42a9a813..baa21f3899 100644
--- a/ArmVirtPkg/ArmVirtXen.dsc
+++ b/ArmVirtPkg/ArmVirtXen.dsc
@@ -95,6 +95,12 @@
gEfiMdeModulePkgTokenSpaceGuid.PcdEmuVariableNvModeEnable|TRUE
[PcdsPatchableInModule.common]
+ # we need to provide a resolution for this PCD that supports PcdSet64()
+ # being called from ArmVirtPkg/Library/PlatformPeiLib/PlatformPeiLib.c,
+ # even though that call will be compiled out on this platform as it does
+ # not (and cannot) support the TPM2 driver stack
+ gEfiSecurityPkgTokenSpaceGuid.PcdTpmBaseAddress|0x0
+
#
# This will be overridden in the code
#
diff --git a/ArmVirtPkg/Library/PlatformPeiLib/PlatformPeiLib.c b/ArmVirtPkg/Library/PlatformPeiLib/PlatformPeiLib.c
index 0a1469550d..8b5b3dd5dc 100644
--- a/ArmVirtPkg/Library/PlatformPeiLib/PlatformPeiLib.c
+++ b/ArmVirtPkg/Library/PlatformPeiLib/PlatformPeiLib.c
@@ -1,7 +1,7 @@
/** @file
*
* Copyright (c) 2011-2014, ARM Limited. All rights reserved.
-* Copyright (c) 2014, Linaro Limited. All rights reserved.
+* Copyright (c) 2014-2020, Linaro Limited. All rights reserved.
*
* SPDX-License-Identifier: BSD-2-Clause-Patent
*
@@ -13,11 +13,24 @@
#include <Library/DebugLib.h>
#include <Library/HobLib.h>
#include <Library/PcdLib.h>
+#include <Library/PeiServicesLib.h>
#include <libfdt.h>
#include <Guid/EarlyPL011BaseAddress.h>
#include <Guid/FdtHob.h>
+STATIC CONST EFI_PEI_PPI_DESCRIPTOR mTpm2DiscoveredPpi = {
+ EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST,
+ &gOvmfTpmDiscoveredPpiGuid,
+ NULL
+};
+
+STATIC CONST EFI_PEI_PPI_DESCRIPTOR mTpm2InitializationDonePpi = {
+ EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST,
+ &gPeiTpmInitializationDonePpiGuid,
+ NULL
+};
+
EFI_STATUS
EFIAPI
PlatformPeim (
@@ -31,14 +44,18 @@ PlatformPeim (
UINT64 *FdtHobData;
UINT64 *UartHobData;
INT32 Node, Prev;
+ INT32 Parent, Depth;
CONST CHAR8 *Compatible;
CONST CHAR8 *CompItem;
CONST CHAR8 *NodeStatus;
INT32 Len;
+ INT32 RangesLen;
INT32 StatusLen;
CONST UINT64 *RegProp;
+ CONST UINT32 *RangesProp;
UINT64 UartBase;
-
+ UINT64 TpmBase;
+ EFI_STATUS Status;
Base = (VOID*)(UINTN)PcdGet64 (PcdDeviceTreeInitialBaseAddress);
ASSERT (Base != NULL);
@@ -58,18 +75,18 @@ PlatformPeim (
ASSERT (UartHobData != NULL);
*UartHobData = 0;
- //
- // Look for a UART node
- //
- for (Prev = 0;; Prev = Node) {
- Node = fdt_next_node (Base, Prev, NULL);
+ TpmBase = 0;
+
+ for (Prev = Depth = 0;; Prev = Node) {
+ Node = fdt_next_node (Base, Prev, &Depth);
if (Node < 0) {
break;
}
- //
- // Check for UART node
- //
+ if (Depth == 1) {
+ Parent = Node;
+ }
+
Compatible = fdt_getprop (Base, Node, "compatible", &Len);
//
@@ -93,10 +110,74 @@ PlatformPeim (
*UartHobData = UartBase;
break;
+ } else if (FeaturePcdGet (PcdTpm2SupportEnabled) &&
+ AsciiStrCmp (CompItem, "tcg,tpm-tis-mmio") == 0) {
+
+ RegProp = fdt_getprop (Base, Node, "reg", &Len);
+ ASSERT (Len == 8 || Len == 16);
+ if (Len == 8) {
+ TpmBase = fdt32_to_cpu (RegProp[0]);
+ } else if (Len == 16) {
+ TpmBase = fdt64_to_cpu (ReadUnaligned64 ((UINT64 *)RegProp));
+ }
+
+ if (Depth > 1) {
+ //
+ // QEMU/mach-virt may put the TPM on the platform bus, in which case
+ // we have to take its 'ranges' property into account to translate the
+ // MMIO address. This consists of a <child base, parent base, size>
+ // tuple, where the child base and the size use the same number of
+ // cells as the 'reg' property above, and the parent base uses 2 cells
+ //
+ RangesProp = fdt_getprop (Base, Parent, "ranges", &RangesLen);
+ ASSERT (RangesProp != NULL);
+
+ //
+ // a plain 'ranges' attribute without a value implies a 1:1 mapping
+ //
+ if (RangesLen != 0) {
+ //
+ // assume a single translated range with 2 cells for the parent base
+ //
+ if (RangesLen != Len + 2 * sizeof (UINT32)) {
+ DEBUG ((DEBUG_WARN,
+ "%a: 'ranges' property has unexpected size %d\n",
+ __FUNCTION__, RangesLen));
+ break;
+ }
+
+ if (Len == 8) {
+ TpmBase -= fdt32_to_cpu (RangesProp[0]);
+ } else {
+ TpmBase -= fdt64_to_cpu (ReadUnaligned64 ((UINT64 *)RangesProp));
+ }
+
+ //
+ // advance RangesProp to the parent bus address
+ //
+ RangesProp = (UINT32 *)((UINT8 *)RangesProp + Len / 2);
+ TpmBase += fdt64_to_cpu (ReadUnaligned64 ((UINT64 *)RangesProp));
+ }
+ }
+ break;
}
}
}
+ if (FeaturePcdGet (PcdTpm2SupportEnabled)) {
+ if (TpmBase != 0) {
+ DEBUG ((DEBUG_INFO, "%a: TPM @ 0x%lx\n", __FUNCTION__, TpmBase));
+
+ Status = (EFI_STATUS)PcdSet64S (PcdTpmBaseAddress, TpmBase);
+ ASSERT_EFI_ERROR (Status);
+
+ Status = PeiServicesInstallPpi (&mTpm2DiscoveredPpi);
+ } else {
+ Status = PeiServicesInstallPpi (&mTpm2InitializationDonePpi);
+ }
+ ASSERT_EFI_ERROR (Status);
+ }
+
BuildFvHob (PcdGet64 (PcdFvBaseAddress), PcdGet32 (PcdFvSize));
return EFI_SUCCESS;
diff --git a/ArmVirtPkg/Library/PlatformPeiLib/PlatformPeiLib.inf b/ArmVirtPkg/Library/PlatformPeiLib/PlatformPeiLib.inf
index 5428040f12..3f97ef0805 100644
--- a/ArmVirtPkg/Library/PlatformPeiLib/PlatformPeiLib.inf
+++ b/ArmVirtPkg/Library/PlatformPeiLib/PlatformPeiLib.inf
@@ -1,7 +1,7 @@
#/** @file
#
# Copyright (c) 2011-2015, ARM Limited. All rights reserved.
-# Copyright (c) 2014, Linaro Limited. All rights reserved.
+# Copyright (c) 2014-2020, Linaro Limited. All rights reserved.
#
# SPDX-License-Identifier: BSD-2-Clause-Patent
#
@@ -11,7 +11,7 @@
INF_VERSION = 0x00010005
BASE_NAME = PlatformPeiLib
FILE_GUID = 59C11815-F8DA-4F49-B4FB-EC1E41ED1F06
- MODULE_TYPE = SEC
+ MODULE_TYPE = BASE
VERSION_STRING = 1.0
LIBRARY_CLASS = PlatformPeiLib
@@ -21,15 +21,21 @@
[Packages]
ArmPkg/ArmPkg.dec
ArmVirtPkg/ArmVirtPkg.dec
- MdePkg/MdePkg.dec
- MdeModulePkg/MdeModulePkg.dec
EmbeddedPkg/EmbeddedPkg.dec
+ MdeModulePkg/MdeModulePkg.dec
+ MdePkg/MdePkg.dec
+ OvmfPkg/OvmfPkg.dec
+ SecurityPkg/SecurityPkg.dec
+
+[FeaturePcd]
+ gArmVirtTokenSpaceGuid.PcdTpm2SupportEnabled
[LibraryClasses]
DebugLib
HobLib
FdtLib
PcdLib
+ PeiServicesLib
[FixedPcd]
gArmTokenSpaceGuid.PcdFvSize
@@ -38,6 +44,11 @@
[Pcd]
gArmTokenSpaceGuid.PcdFvBaseAddress
gArmVirtTokenSpaceGuid.PcdDeviceTreeInitialBaseAddress
+ gEfiSecurityPkgTokenSpaceGuid.PcdTpmBaseAddress ## SOMETIMES_PRODUCES
+
+[Ppis]
+ gOvmfTpmDiscoveredPpiGuid ## SOMETIMES_PRODUCES
+ gPeiTpmInitializationDonePpiGuid ## SOMETIMES_PRODUCES
[Guids]
gEarlyPL011BaseAddressGuid