On Tue, 27 Nov 2018 at 07:20, Sughosh Ganu <[email protected]> wrote:
>
> From: Achin Gupta <[email protected]>
>
> The Standalone MM environment runs in S-EL0 in AArch64 on ARM Standard
> Platforms. Privileged firmware e.g. ARM Trusted Firmware sets up its
> architectural context including the initial translation tables for the
> S-EL1/EL0 translation regime. The MM environment will still request ARM
> TF to change the memory attributes of memory regions during
> initialization.
>
> The Standalone MM image is a FV that encapsulates the MM foundation
> and drivers. These are PE-COFF images with data and text segments.
> To initialise the MM environment, Arm Trusted Firmware has to create
> translation tables with sane default attributes for the memory
> occupied by the FV. This library sends SVCs to ARM Trusted Firmware
> to request memory permissions change for data and text segments.
>
> This patch adds a simple MMU library suitable for execution in S-EL0 and
> requesting memory permissions change operations from Arm Trusted Firmware.
>
> Contributed-under: TianoCore Contribution Agreement 1.1
> Signed-off-by: Sughosh Ganu <[email protected]>
> ---
> ArmPkg/ArmPkg.dec
> |
> 1 +
>
> ArmVirtPkg/Library/XenArmGenericTimerVirtCounterLib/XenArmGenericTimerVirtCounterLib.inf
> => ArmPkg/Library/StandaloneMmMmuLib/ArmMmuStandaloneMmLib.inf | 23 +--
> ArmPkg/Include/Library/{ArmMmuLib.h => StandaloneMmMmuLib.h}
> |
> 38 +---
> ArmPkg/Library/StandaloneMmMmuLib/Aarch64/ArmMmuStandaloneMmLib.c
> |
> 185 ++++++++++++++++++++
> 4 files changed, 203 insertions(+), 44 deletions(-)
>
> diff --git a/ArmPkg/ArmPkg.dec b/ArmPkg/ArmPkg.dec
> index 0db7aa9d301c..d99eb6769ff1 100644
> --- a/ArmPkg/ArmPkg.dec
> +++ b/ArmPkg/ArmPkg.dec
> @@ -42,6 +42,7 @@ [LibraryClasses.common]
> ArmMtlLib|ArmPlatformPkg/Include/Library/ArmMtlLib.h
> ArmSvcLib|Include/Library/ArmSvcLib.h
> OpteeLib|Include/Library/OpteeLib.h
> + StandaloneMmMmuLib|Include/Library/StandaloneMmMmuLib.h
>
> [Guids.common]
> gArmTokenSpaceGuid = { 0xBB11ECFE, 0x820F, 0x4968, { 0xBB, 0xA6,
> 0xF7, 0x6A, 0xFE, 0x30, 0x25, 0x96 } }
> diff --git
> a/ArmVirtPkg/Library/XenArmGenericTimerVirtCounterLib/XenArmGenericTimerVirtCounterLib.inf
> b/ArmPkg/Library/StandaloneMmMmuLib/ArmMmuStandaloneMmLib.inf
> similarity index 56%
> copy from
> ArmVirtPkg/Library/XenArmGenericTimerVirtCounterLib/XenArmGenericTimerVirtCounterLib.inf
> copy to ArmPkg/Library/StandaloneMmMmuLib/ArmMmuStandaloneMmLib.inf
> index bd6ac8039844..d589b236033c 100644
> ---
> a/ArmVirtPkg/Library/XenArmGenericTimerVirtCounterLib/XenArmGenericTimerVirtCounterLib.inf
> +++ b/ArmPkg/Library/StandaloneMmMmuLib/ArmMmuStandaloneMmLib.inf
> @@ -1,7 +1,6 @@
> #/** @file
> -# Implement ArmGenericTimerCounterLib for Xen using the virtual timer
> #
> -# Copyright (c) 2014 - 2018, Linaro Ltd. All rights reserved.<BR>
> +# Copyright (c) 2017 - 2018, ARM Limited. All rights reserved.
> #
> # This program and the accompanying materials
> # are licensed and made available under the terms and conditions of the BSD
> License
> @@ -15,19 +14,23 @@
>
> [Defines]
> INF_VERSION = 0x0001001A
> - BASE_NAME = XenArmGenericTimerVirtCounterLib
> - FILE_GUID = e3913319-96ac-4ac0-808b-8edb8776a51c
> - MODULE_TYPE = BASE
> + BASE_NAME = ArmMmuStandaloneMmCoreLib
> + FILE_GUID = da8f0232-fb14-42f0-922c-63104d2c70bd
> + MODULE_TYPE = MM_CORE_STANDALONE
> VERSION_STRING = 1.0
> - LIBRARY_CLASS = ArmGenericTimerCounterLib
> + LIBRARY_CLASS = StandaloneMmMmuLib
> + PI_SPECIFICATION_VERSION = 0x00010032
>
> -[Sources]
> - XenArmGenericTimerVirtCounterLib.c
> +[Sources.AARCH64]
> + Aarch64/ArmMmuStandaloneMmLib.c
>
> [Packages]
> - MdePkg/MdePkg.dec
> ArmPkg/ArmPkg.dec
> + MdePkg/MdePkg.dec
>
> [LibraryClasses]
> ArmLib
> - BaseLib
> + CacheMaintenanceLib
> + MemoryAllocationLib
> +
> +
> diff --git a/ArmPkg/Include/Library/ArmMmuLib.h
> b/ArmPkg/Include/Library/StandaloneMmMmuLib.h
> similarity index 55%
> copy from ArmPkg/Include/Library/ArmMmuLib.h
> copy to ArmPkg/Include/Library/StandaloneMmMmuLib.h
> index fb7fd006417c..1f7653d00430 100644
> --- a/ArmPkg/Include/Library/ArmMmuLib.h
> +++ b/ArmPkg/Include/Library/StandaloneMmMmuLib.h
> @@ -1,6 +1,6 @@
> /** @file
>
> - Copyright (c) 2015 - 2016, Linaro Ltd. All rights reserved.<BR>
> + Copyright (c) 2018, ARM Ltd. All rights reserved.
>
> This program and the accompanying materials
> are licensed and made available under the terms and conditions of the BSD
> License
> @@ -12,61 +12,31 @@
>
> **/
>
> -#ifndef __ARM_MMU_LIB__
> -#define __ARM_MMU_LIB__
> -
> -#include <Uefi/UefiBaseType.h>
> -
> -#include <Library/ArmLib.h>
> -
> -EFI_STATUS
> -EFIAPI
> -ArmConfigureMmu (
> - IN ARM_MEMORY_REGION_DESCRIPTOR *MemoryTable,
> - OUT VOID **TranslationTableBase OPTIONAL,
> - OUT UINTN *TranslationTableSize OPTIONAL
> - );
> +#ifndef __STANDALONEMM_MMU_LIB__
> +#define __STANDALONEMM_MMU_LIB__
>
> EFI_STATUS
> -EFIAPI
> ArmSetMemoryRegionNoExec (
> IN EFI_PHYSICAL_ADDRESS BaseAddress,
> IN UINT64 Length
> );
>
> EFI_STATUS
> -EFIAPI
> ArmClearMemoryRegionNoExec (
> IN EFI_PHYSICAL_ADDRESS BaseAddress,
> IN UINT64 Length
> );
>
> EFI_STATUS
> -EFIAPI
> ArmSetMemoryRegionReadOnly (
> IN EFI_PHYSICAL_ADDRESS BaseAddress,
> IN UINT64 Length
> );
>
> EFI_STATUS
> -EFIAPI
> ArmClearMemoryRegionReadOnly (
> IN EFI_PHYSICAL_ADDRESS BaseAddress,
> IN UINT64 Length
> );
>
> -VOID
> -EFIAPI
> -ArmReplaceLiveTranslationEntry (
> - IN UINT64 *Entry,
> - IN UINT64 Value
> - );
> -
> -EFI_STATUS
> -ArmSetMemoryAttributes (
> - IN EFI_PHYSICAL_ADDRESS BaseAddress,
> - IN UINT64 Length,
> - IN UINT64 Attributes
> - );
> -
> -#endif
> +#endif /* __STANDALONEMM_MMU_LIB__ */
> diff --git
> a/ArmPkg/Library/StandaloneMmMmuLib/Aarch64/ArmMmuStandaloneMmLib.c
> b/ArmPkg/Library/StandaloneMmMmuLib/Aarch64/ArmMmuStandaloneMmLib.c
> new file mode 100644
> index 000000000000..d7d87b7d5d69
> --- /dev/null
> +++ b/ArmPkg/Library/StandaloneMmMmuLib/Aarch64/ArmMmuStandaloneMmLib.c
> @@ -0,0 +1,185 @@
> +/** @file
> +* File managing the MMU for ARMv8 architecture in S-EL0
> +*
> +* Copyright (c) 2017 - 2018, ARM Limited. All rights reserved.
> +*
> +* This program and the accompanying materials
> +* are licensed and made available under the terms and conditions of the BSD
> License
> +* which accompanies this distribution. The full text of the license may be
> found at
> +* http://opensource.org/licenses/bsd-license.php
> +*
> +* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
> +* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR
> IMPLIED.
> +*
> +**/
> +
> +#include <Uefi.h>
> +#include <Chipset/AArch64.h>
Why do you need this include? If you can drop it, can you also make
the library generic (i.e., supporting ARM as well as AArch64) ?
(apologies for not spotting this before)
> +#include <IndustryStandard/ArmMmSvc.h>
> +
> +#include <Library/ArmLib.h>
> +#include <Library/ArmMmuLib.h>
> +#include <Library/ArmSvcLib.h>
> +#include <Library/BaseLib.h>
> +#include <Library/DebugLib.h>
> +
> +STATIC
> +EFI_STATUS
> +GetMemoryPermissions (
> + IN EFI_PHYSICAL_ADDRESS BaseAddress,
> + OUT UINT32 *MemoryAttributes
> + )
> +{
> + ARM_SVC_ARGS GetMemoryPermissionsSvcArgs = {0};
> +
> + GetMemoryPermissionsSvcArgs.Arg0 =
> ARM_SVC_ID_SP_GET_MEM_ATTRIBUTES_AARCH64;
> + GetMemoryPermissionsSvcArgs.Arg1 = BaseAddress;
> + GetMemoryPermissionsSvcArgs.Arg2 = 0;
> + GetMemoryPermissionsSvcArgs.Arg3 = 0;
> +
> + ArmCallSvc (&GetMemoryPermissionsSvcArgs);
> + if (GetMemoryPermissionsSvcArgs.Arg0 == ARM_SVC_SPM_RET_INVALID_PARAMS) {
> + *MemoryAttributes = 0;
> + return EFI_INVALID_PARAMETER;
> + }
> +
> + *MemoryAttributes = GetMemoryPermissionsSvcArgs.Arg0;
> + return EFI_SUCCESS;
> +}
> +
> +STATIC
> +EFI_STATUS
> +RequestMemoryPermissionChange (
> + IN EFI_PHYSICAL_ADDRESS BaseAddress,
> + IN UINT64 Length,
> + IN UINTN Permissions
> + )
> +{
> + EFI_STATUS Status;
> + ARM_SVC_ARGS ChangeMemoryPermissionsSvcArgs = {0};
> +
> + ChangeMemoryPermissionsSvcArgs.Arg0 =
> ARM_SVC_ID_SP_SET_MEM_ATTRIBUTES_AARCH64;
> + ChangeMemoryPermissionsSvcArgs.Arg1 = BaseAddress;
> + ChangeMemoryPermissionsSvcArgs.Arg2 = EFI_SIZE_TO_PAGES(Length);
> + ChangeMemoryPermissionsSvcArgs.Arg3 = Permissions;
> +
> + ArmCallSvc (&ChangeMemoryPermissionsSvcArgs);
> +
> + Status = ChangeMemoryPermissionsSvcArgs.Arg0;
> +
> + switch (Status) {
> + case ARM_SVC_SPM_RET_SUCCESS:
> + Status = EFI_SUCCESS;
> + break;
> +
> + case ARM_SVC_SPM_RET_NOT_SUPPORTED:
> + Status = EFI_UNSUPPORTED;
> + break;
> +
> + case ARM_SVC_SPM_RET_INVALID_PARAMS:
> + Status = EFI_INVALID_PARAMETER;
> + break;
> +
> + case ARM_SVC_SPM_RET_DENIED:
> + Status = EFI_ACCESS_DENIED;
> + break;
> +
> + case ARM_SVC_SPM_RET_NO_MEMORY:
> + Status = EFI_BAD_BUFFER_SIZE;
> + break;
> +
> + default:
> + Status = EFI_ACCESS_DENIED;
> + ASSERT (0);
> + }
> +
> + return Status;
> +}
> +
> +EFI_STATUS
> +ArmSetMemoryRegionNoExec (
> + IN EFI_PHYSICAL_ADDRESS BaseAddress,
> + IN UINT64 Length
> + )
> +{
> + EFI_STATUS Status;
> + UINT32 MemoryAttributes;
> + UINT32 CodePermission;
> +
> + Status = GetMemoryPermissions (BaseAddress, &MemoryAttributes);
> + if (Status != EFI_INVALID_PARAMETER) {
> + CodePermission = SET_MEM_ATTR_CODE_PERM_XN <<
> SET_MEM_ATTR_CODE_PERM_SHIFT;
> + return RequestMemoryPermissionChange (
> + BaseAddress,
> + Length,
> + MemoryAttributes | CodePermission
> + );
> + }
> + return EFI_INVALID_PARAMETER;
> +}
> +
> +EFI_STATUS
> +ArmClearMemoryRegionNoExec (
> + IN EFI_PHYSICAL_ADDRESS BaseAddress,
> + IN UINT64 Length
> + )
> +{
> + EFI_STATUS Status;
> + UINT32 MemoryAttributes;
> + UINT32 CodePermission;
> +
> + Status = GetMemoryPermissions (BaseAddress, &MemoryAttributes);
> + if (Status != EFI_INVALID_PARAMETER) {
> + CodePermission = SET_MEM_ATTR_CODE_PERM_XN <<
> SET_MEM_ATTR_CODE_PERM_SHIFT;
> + return RequestMemoryPermissionChange (
> + BaseAddress,
> + Length,
> + MemoryAttributes & ~CodePermission
> + );
> + }
> + return EFI_INVALID_PARAMETER;
> +}
> +
> +EFI_STATUS
> +ArmSetMemoryRegionReadOnly (
> + IN EFI_PHYSICAL_ADDRESS BaseAddress,
> + IN UINT64 Length
> + )
> +{
> + EFI_STATUS Status;
> + UINT32 MemoryAttributes;
> + UINT32 DataPermission;
> +
> + Status = GetMemoryPermissions (BaseAddress, &MemoryAttributes);
> + if (Status != EFI_INVALID_PARAMETER) {
> + DataPermission = SET_MEM_ATTR_DATA_PERM_RO <<
> SET_MEM_ATTR_DATA_PERM_SHIFT;
> + return RequestMemoryPermissionChange (
> + BaseAddress,
> + Length,
> + MemoryAttributes | DataPermission
> + );
> + }
> + return EFI_INVALID_PARAMETER;
> +}
> +
> +EFI_STATUS
> +ArmClearMemoryRegionReadOnly (
> + IN EFI_PHYSICAL_ADDRESS BaseAddress,
> + IN UINT64 Length
> + )
> +{
> + EFI_STATUS Status;
> + UINT32 MemoryAttributes;
> + UINT32 PermissionRequest;
> +
> + Status = GetMemoryPermissions (BaseAddress, &MemoryAttributes);
> + if (Status != EFI_INVALID_PARAMETER) {
> + PermissionRequest = SET_MEM_ATTR_MAKE_PERM_REQUEST
> (SET_MEM_ATTR_DATA_PERM_RW, MemoryAttributes);
> + return RequestMemoryPermissionChange (
> + BaseAddress,
> + Length,
> + PermissionRequest
> + );
> + }
> + return EFI_INVALID_PARAMETER;
> +}
> --
> 2.7.4
>
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