[edk2-devel] [PATCH v2 1/5] ArmVirtPkg: Library: Memory initialization for Cloud Hypervisor
Laszlo Ersek
lersek at redhat.com
Wed May 19 06:07:32 UTC 2021
On 05/17/21 08:50, Jianyong Wu wrote:
> Cloud Hypervisor is kvm based VMM implemented in rust.
>
> This library populates the system memory map for the
> Cloud Hypervisor virtual platform.
>
> Cc: Laszlo Ersek <lersek at redhat.com>
> Cc: Ard Biesheuvel <ardb+tianocore at kernel.org>
> Cc: Leif Lindholm <leif at nuviainc.com>
> Signed-off-by: Jianyong Wu <jianyong.wu at arm.com>
> ---
> .../CloudHvVirtMemInfoPeiLib.inf | 47 ++++++++
> .../CloudHvVirtMemInfoLib.c | 94 ++++++++++++++++
> .../CloudHvVirtMemInfoPeiLibConstructor.c | 100 ++++++++++++++++++
> 3 files changed, 241 insertions(+)
> create mode 100644 ArmVirtPkg/Library/CloudHvVirtMemInfoLib/CloudHvVirtMemInfoPeiLib.inf
> create mode 100644 ArmVirtPkg/Library/CloudHvVirtMemInfoLib/CloudHvVirtMemInfoLib.c
> create mode 100644 ArmVirtPkg/Library/CloudHvVirtMemInfoLib/CloudHvVirtMemInfoPeiLibConstructor.c
>
> diff --git a/ArmVirtPkg/Library/CloudHvVirtMemInfoLib/CloudHvVirtMemInfoPeiLib.inf b/ArmVirtPkg/Library/CloudHvVirtMemInfoLib/CloudHvVirtMemInfoPeiLib.inf
> new file mode 100644
> index 000000000000..71dbf9c06ccc
> --- /dev/null
> +++ b/ArmVirtPkg/Library/CloudHvVirtMemInfoLib/CloudHvVirtMemInfoPeiLib.inf
> @@ -0,0 +1,47 @@
> +#/* @file
> +#
> +# Copyright (c) 2011-2015, ARM Limited. All rights reserved.
(1) New file, please refresh the end year in the (C) notice.
> +# Copyright (c) 2014-2017, Linaro Limited. All rights reserved.
> +#
> +# SPDX-License-Identifier: BSD-2-Clause-Patent
> +#
> +#*/
> +
> +[Defines]
> + INF_VERSION = 0x0001001A
> + BASE_NAME = ClhVirtMemInfoPeiLib
> + FILE_GUID = 3E29D940-0591-EE6A-CAD4-223A9CF55E75
> + MODULE_TYPE = BASE
> + VERSION_STRING = 1.0
> + LIBRARY_CLASS = ArmVirtMemInfoLib|PEIM
> + CONSTRUCTOR = CloudHvVirtMemInfoPeiLibConstructor
> +
> +[Sources]
> + CloudHvVirtMemInfoLib.c
> + CloudHvVirtMemInfoPeiLibConstructor.c
> +
> +[Packages]
> + ArmPkg/ArmPkg.dec
> + ArmVirtPkg/ArmVirtPkg.dec
> + EmbeddedPkg/EmbeddedPkg.dec
> + MdeModulePkg/MdeModulePkg.dec
> + MdePkg/MdePkg.dec
> +
> +[LibraryClasses]
> + ArmLib
> + BaseMemoryLib
> + DebugLib
> + FdtLib
> + PcdLib
> + MemoryAllocationLib
> +
> +[Pcd]
> + gArmTokenSpaceGuid.PcdFdBaseAddress
> + gArmTokenSpaceGuid.PcdFvBaseAddress
> + gArmTokenSpaceGuid.PcdSystemMemoryBase
> + gArmTokenSpaceGuid.PcdSystemMemorySize
> +
> +[FixedPcd]
> + gArmTokenSpaceGuid.PcdFdSize
> + gArmTokenSpaceGuid.PcdFvSize
> + gArmVirtTokenSpaceGuid.PcdDeviceTreeInitialBaseAddress
> diff --git a/ArmVirtPkg/Library/CloudHvVirtMemInfoLib/CloudHvVirtMemInfoLib.c b/ArmVirtPkg/Library/CloudHvVirtMemInfoLib/CloudHvVirtMemInfoLib.c
> new file mode 100644
> index 000000000000..69f4e6ab6cc4
> --- /dev/null
> +++ b/ArmVirtPkg/Library/CloudHvVirtMemInfoLib/CloudHvVirtMemInfoLib.c
> @@ -0,0 +1,94 @@
> +/** @file
> +
> + Copyright (c) 2014-2017, Linaro Limited. All rights reserved.
(2) New file, ARM (C) missing.
> +
> + SPDX-License-Identifier: BSD-2-Clause-Patent
> +
> +**/
> +
> +#include <Base.h>
> +#include <Library/ArmLib.h>
> +#include <Library/BaseMemoryLib.h>
> +#include <Library/DebugLib.h>
> +#include <Library/MemoryAllocationLib.h>
> +
> +// Number of Virtual Memory Map Descriptors
> +#define MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS 5
> +
> +//
> +// mach-virt's core peripherals such as the UART, the GIC and the RTC are
> +// all mapped in the 'miscellaneous device I/O' region, which we just map
> +// in its entirety rather than device by device. Note that it does not
> +// cover any of the NOR flash banks or PCI resource windows.
> +//
> +#define MACH_VIRT_PERIPH_BASE 0x08000000
> +#define MACH_VIRT_PERIPH_SIZE SIZE_128MB
> +
> +//
> +// in cloud-hypervisor, 0x0 ~ 0x8000000 is reserved as normal memory for UEFI
> +//
> +#define CLOUDHV_UEFI_MEM_BASE 0x0
> +#define CLOUDHV_UEFI_MEM_SIZE 0x08000000
> +
> +/**
> + Return the Virtual Memory Map of your platform
> +
> + This Virtual Memory Map is used by MemoryInitPei Module to initialize the MMU
> + on your platform.
> +
> + @param[out] VirtualMemoryMap Array of ARM_MEMORY_REGION_DESCRIPTOR
> + describing a Physical-to-Virtual Memory
> + mapping. This array must be ended by a
> + zero-filled entry. The allocated memory
> + will not be freed.
> +
> +**/
> +VOID
> +ArmVirtGetMemoryMap (
> + OUT ARM_MEMORY_REGION_DESCRIPTOR **VirtualMemoryMap
> + )
> +{
> + ARM_MEMORY_REGION_DESCRIPTOR *VirtualMemoryTable;
> +
> + ASSERT (VirtualMemoryMap != NULL);
> +
> + VirtualMemoryTable = AllocatePool (sizeof (ARM_MEMORY_REGION_DESCRIPTOR) *
> + MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS);
> +
> + if (VirtualMemoryTable == NULL) {
> + DEBUG ((DEBUG_ERROR, "%a: Error: Failed AllocatePool()\n", __FUNCTION__));
> + return;
> + }
> +
> + // System DRAM
> + VirtualMemoryTable[0].PhysicalBase = PcdGet64 (PcdSystemMemoryBase);
> + VirtualMemoryTable[0].VirtualBase = VirtualMemoryTable[0].PhysicalBase;
> + VirtualMemoryTable[0].Length = PcdGet64 (PcdSystemMemorySize);
> + VirtualMemoryTable[0].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK;
> +
> + DEBUG ((DEBUG_INFO, "%a: Dumping System DRAM Memory Map:\n"
> + "\tPhysicalBase: 0x%lX\n"
> + "\tVirtualBase: 0x%lX\n"
> + "\tLength: 0x%lX\n",
> + __FUNCTION__,
> + VirtualMemoryTable[0].PhysicalBase,
> + VirtualMemoryTable[0].VirtualBase,
> + VirtualMemoryTable[0].Length));
> +
> + // Memory mapped peripherals (UART, RTC, GIC, virtio-mmio, etc)
> + VirtualMemoryTable[1].PhysicalBase = MACH_VIRT_PERIPH_BASE;
> + VirtualMemoryTable[1].VirtualBase = MACH_VIRT_PERIPH_BASE;
> + VirtualMemoryTable[1].Length = MACH_VIRT_PERIPH_SIZE;
> + VirtualMemoryTable[1].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
> +
> + // Map the FV region as normal executable memory
> + VirtualMemoryTable[2].PhysicalBase = PcdGet64 (PcdFvBaseAddress);
> + VirtualMemoryTable[2].VirtualBase = VirtualMemoryTable[2].PhysicalBase;
> + VirtualMemoryTable[2].Length = FixedPcdGet32 (PcdFvSize);
> + VirtualMemoryTable[2].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK;
> +
> + // End of Table
> + ZeroMem (&VirtualMemoryTable[3], sizeof (ARM_MEMORY_REGION_DESCRIPTOR));
> +
> + *VirtualMemoryMap = VirtualMemoryTable;
> +}
> diff --git a/ArmVirtPkg/Library/CloudHvVirtMemInfoLib/CloudHvVirtMemInfoPeiLibConstructor.c b/ArmVirtPkg/Library/CloudHvVirtMemInfoLib/CloudHvVirtMemInfoPeiLibConstructor.c
> new file mode 100644
> index 000000000000..062dfcee1d66
> --- /dev/null
> +++ b/ArmVirtPkg/Library/CloudHvVirtMemInfoLib/CloudHvVirtMemInfoPeiLibConstructor.c
> @@ -0,0 +1,100 @@
> +/** @file
> +
> + Copyright (c) 2014-2017, Linaro Limited. All rights reserved.
(3) New file, ARM (C) missing.
With those updates:
Acked-by: Laszlo Ersek <lersek at redhat.com>
(BTW I'd like at least one of Ard, Leif, and Sami to give an R-b for
this patch set.)
Thanks,
Laszlo
> +
> + SPDX-License-Identifier: BSD-2-Clause-Patent
> +
> +**/
> +
> +#include <Base.h>
> +#include <Library/DebugLib.h>
> +#include <Library/PcdLib.h>
> +#include <libfdt.h>
> +
> +RETURN_STATUS
> +EFIAPI
> +CloudHvVirtMemInfoPeiLibConstructor (
> + VOID
> + )
> +{
> + VOID *DeviceTreeBase;
> + INT32 Node, Prev;
> + UINT64 NewBase, CurBase;
> + UINT64 NewSize, CurSize;
> + CONST CHAR8 *Type;
> + INT32 Len;
> + CONST UINT64 *RegProp;
> + RETURN_STATUS PcdStatus;
> +
> + NewBase = 0;
> + NewSize = 0;
> +
> + DeviceTreeBase = (VOID *)(UINTN)PcdGet64 (PcdDeviceTreeInitialBaseAddress);
> + ASSERT (DeviceTreeBase != NULL);
> +
> + //
> + // Make sure we have a valid device tree blob
> + //
> + ASSERT (fdt_check_header (DeviceTreeBase) == 0);
> +
> + //
> + // Look for the lowest memory node
> + //
> + for (Prev = 0;; Prev = Node) {
> + Node = fdt_next_node (DeviceTreeBase, Prev, NULL);
> + if (Node < 0) {
> + break;
> + }
> +
> + //
> + // Check for memory node
> + //
> + Type = fdt_getprop (DeviceTreeBase, Node, "device_type", &Len);
> + if (Type && AsciiStrnCmp (Type, "memory", Len) == 0) {
> + //
> + // Get the 'reg' property of this node. For now, we will assume
> + // two 8 byte quantities for base and size, respectively.
> + //
> + RegProp = fdt_getprop (DeviceTreeBase, Node, "reg", &Len);
> + if (RegProp != 0 && Len == (2 * sizeof (UINT64))) {
> +
> + CurBase = fdt64_to_cpu (ReadUnaligned64 (RegProp));
> + CurSize = fdt64_to_cpu (ReadUnaligned64 (RegProp + 1));
> +
> + DEBUG ((DEBUG_INFO, "%a: System RAM @ 0x%lx - 0x%lx\n",
> + __FUNCTION__, CurBase, CurBase + CurSize - 1));
> +
> + if (NewBase > CurBase || NewBase == 0) {
> + NewBase = CurBase;
> + NewSize = CurSize;
> + }
> + } else {
> + DEBUG ((DEBUG_ERROR, "%a: Failed to parse FDT memory node\n",
> + __FUNCTION__));
> + }
> + }
> + }
> +
> + //
> + // Make sure the start of DRAM matches our expectation
> + //
> + ASSERT (FixedPcdGet64 (PcdSystemMemoryBase) == NewBase);
> + PcdStatus = PcdSet64S (PcdSystemMemorySize, NewSize);
> + ASSERT_RETURN_ERROR (PcdStatus);
> +
> + //
> + // We need to make sure that the machine we are running on has at least
> + // 128 MB of memory configured, and is currently executing this binary from
> + // NOR flash. This prevents a device tree image in DRAM from getting
> + // clobbered when our caller installs permanent PEI RAM, before we have a
> + // chance of marking its location as reserved or copy it to a freshly
> + // allocated block in the permanent PEI RAM in the platform PEIM.
> + //
> + ASSERT (NewSize >= SIZE_128MB);
> + ASSERT (
> + (((UINT64)PcdGet64 (PcdFdBaseAddress) +
> + (UINT64)PcdGet32 (PcdFdSize)) <= NewBase) ||
> + ((UINT64)PcdGet64 (PcdFdBaseAddress) >= (NewBase + NewSize)));
> +
> + return RETURN_SUCCESS;
> +}
>
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