From: "Gerd Hoffmann" <kraxel@redhat.com>
To: Min Xu <min.m.xu@intel.com>
Cc: devel@edk2.groups.io, Ard Biesheuvel <ardb+tianocore@kernel.org>,
Jordan Justen <jordan.l.justen@intel.com>,
Brijesh Singh <brijesh.singh@amd.com>,
Erdem Aktas <erdemaktas@google.com>,
James Bottomley <jejb@linux.ibm.com>,
Jiewen Yao <jiewen.yao@intel.com>,
Tom Lendacky <thomas.lendacky@amd.com>
Subject: Re: [PATCH V4 22/31] OvmfPkg: Update PlatformPei to support TDX
Date: Wed, 15 Dec 2021 09:53:05 +0100 [thread overview]
Message-ID: <20211215085305.qb6akg5nlxio4m2h@sirius.home.kraxel.org> (raw)
In-Reply-To: <94bb5cbbb19bb7b14513082b386554fc59168eb4.1639399598.git.min.m.xu@intel.com>
> +/**
> + Check if it is Tdx guest
> +
> + @retval TRUE It is Tdx guest
> + @retval FALSE It is not Tdx guest
> +**/
> +BOOLEAN
> +PlatformPeiIsTdxGuest (
> + VOID
> + )
> +{
> + CONFIDENTIAL_COMPUTING_WORK_AREA_HEADER *CcWorkAreaHeader;
> +
> + CcWorkAreaHeader = (CONFIDENTIAL_COMPUTING_WORK_AREA_HEADER *)FixedPcdGet32 (PcdOvmfWorkAreaBase);
> + return (CcWorkAreaHeader != NULL && CcWorkAreaHeader->GuestType == GUEST_TYPE_INTEL_TDX);
> +}
fwcfg patch adds a similar function. Can't we have a single function
somewhere, or have a #define for this check, instead of doing this
cut+paste programming?
> +VOID
> +EFIAPI
> +DEBUG_HOBLIST (
> + IN CONST VOID *HobStart
> + )
> +{
> + EFI_PEI_HOB_POINTERS Hob;
> +
> + Hob.Raw = (UINT8 *)HobStart;
> + //
> + // Parse the HOB list until end of list or matching type is found.
> + //
> + while (!END_OF_HOB_LIST (Hob)) {
> + DEBUG ((DEBUG_INFO, "HOB(%p) : %x %x\n", Hob, Hob.Header->HobType, Hob.Header->HobLength));
> + switch (Hob.Header->HobType) {
> + case EFI_HOB_TYPE_RESOURCE_DESCRIPTOR:
> + DEBUG ((
> + DEBUG_INFO,
> + "\t: %x %x %llx %llx\n",
> + Hob.ResourceDescriptor->ResourceType,
> + Hob.ResourceDescriptor->ResourceAttribute,
> + Hob.ResourceDescriptor->PhysicalStart,
> + Hob.ResourceDescriptor->ResourceLength
> + ));
> +
> + break;
> + case EFI_HOB_TYPE_MEMORY_ALLOCATION:
> + DEBUG ((
> + DEBUG_INFO,
> + "\t: %llx %llx %x\n",
> + Hob.MemoryAllocation->AllocDescriptor.MemoryBaseAddress,
> + Hob.MemoryAllocation->AllocDescriptor.MemoryLength,
> + Hob.MemoryAllocation->AllocDescriptor.MemoryType
> + ));
> + break;
> + default:
> + break;
> + }
> +
> + Hob.Raw = GET_NEXT_HOB (Hob);
> + }
> +}
Likewise, I've seen this before in another patch of this series.
> diff --git a/OvmfPkg/PlatformPei/MemDetect.c b/OvmfPkg/PlatformPei/MemDetect.c
> index 934d5c196570..9227fa260ccd 100644
> --- a/OvmfPkg/PlatformPei/MemDetect.c
> +++ b/OvmfPkg/PlatformPei/MemDetect.c
> @@ -36,6 +36,7 @@ Module Name:
> #include <Library/MtrrLib.h>
> #include <Library/QemuFwCfgLib.h>
> #include <Library/QemuFwCfgSimpleParserLib.h>
> +#include <Library/TdxLib.h>
>
> #include "Platform.h"
> #include "Cmos.h"
> @@ -556,7 +557,19 @@ AddressWidthInitialization (
> mPhysMemAddressWidth = 36;
> }
>
> + #if defined (MDE_CPU_X64)
> + if (PlatformPeiIsTdxGuest ()) {
> + if (TdSharedPageMask () == (1ULL << 47)) {
> + mPhysMemAddressWidth = 48;
> + } else {
> + mPhysMemAddressWidth = 52;
> + }
> + }
> +
> + ASSERT (mPhysMemAddressWidth <= 52);
> + #else
Making this TDX-specific looks wrong to me. 5-level paging exists
outside TDX too.
Given we don't support 5-level paging (yet) I think we can just drop
this and revisit in case 5-level paging support is added in the future.
> + UINT32 Pml5Entries;
Same here.
take care,
Gerd
next prev parent reply other threads:[~2021-12-15 8:53 UTC|newest]
Thread overview: 68+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-13 12:56 [PATCH V4 00/31] Enable Intel TDX in OvmfPkg (Config-A) Min Xu
2021-12-13 12:56 ` [PATCH V4 01/31] MdePkg: Add Tdx.h Min Xu
2021-12-13 12:56 ` [PATCH V4 02/31] MdePkg: Introduce basic Tdx functions in BaseLib Min Xu
2021-12-15 6:33 ` Gerd Hoffmann
2021-12-13 12:56 ` [PATCH V4 03/31] MdePkg: Add TdxLib to wrap Tdx operations Min Xu
2021-12-15 6:44 ` Gerd Hoffmann
2021-12-13 12:56 ` [PATCH V4 04/31] UefiCpuPkg: Extend VmgExitLibNull to handle #VE exception Min Xu
2021-12-13 12:56 ` [PATCH V4 05/31] OvmfPkg: Extend VmgExitLib " Min Xu
2021-12-15 6:56 ` [edk2-devel] " Gerd Hoffmann
2022-01-20 6:34 ` Min Xu
2021-12-13 12:56 ` [PATCH V4 06/31] UefiCpuPkg/CpuExceptionHandler: Add base support for the " Min Xu
2021-12-13 12:56 ` [PATCH V4 07/31] MdePkg: Add helper functions for Tdx guest in BaseIoLibIntrinsic Min Xu
2021-12-13 12:56 ` [PATCH V4 08/31] MdePkg: Support mmio " Min Xu
2021-12-15 7:02 ` Gerd Hoffmann
2021-12-13 12:56 ` [PATCH V4 09/31] MdePkg: Support IoFifo " Min Xu
2021-12-15 7:18 ` Gerd Hoffmann
2021-12-13 12:56 ` [PATCH V4 10/31] MdePkg: Support IoRead/IoWrite " Min Xu
2021-12-15 7:18 ` Gerd Hoffmann
2021-12-13 12:56 ` [PATCH V4 11/31] UefiCpuPkg: Support TDX in BaseXApicX2ApicLib Min Xu
2021-12-13 12:56 ` [PATCH V4 12/31] MdePkg: Add macro to check SEV / TDX guest Min Xu
2021-12-13 12:56 ` [PATCH V4 13/31] UefiCpuPkg: Enable Tdx support in MpInitLib Min Xu
2021-12-15 7:33 ` Gerd Hoffmann
2021-12-13 12:56 ` [PATCH V4 14/31] OvmfPkg: Add IntelTdx.h in OvmfPkg/Include/IndustryStandard Min Xu
2021-12-15 7:37 ` Gerd Hoffmann
2021-12-16 6:43 ` Min Xu
2021-12-13 12:56 ` [PATCH V4 15/31] OvmfPkg: Add TdxMailboxLib Min Xu
2021-12-15 7:47 ` Gerd Hoffmann
2021-12-13 12:56 ` [PATCH V4 16/31] MdePkg: Add EFI_RESOURCE_ATTRIBUTE_ENCRYPTED in PiHob.h Min Xu
2021-12-13 12:56 ` [PATCH V4 17/31] OvmfPkg: Update Sec to support Tdx Min Xu
2021-12-15 8:18 ` Gerd Hoffmann
2021-12-16 8:11 ` [edk2-devel] " Min Xu
2021-12-13 12:56 ` [PATCH V4 18/31] OvmfPkg: Check Tdx in QemuFwCfgPei to avoid DMA operation Min Xu
2021-12-15 8:19 ` Gerd Hoffmann
2021-12-13 12:56 ` [PATCH V4 19/31] MdeModulePkg: EFER should not be changed in TDX Min Xu
2021-12-13 12:56 ` [PATCH V4 20/31] MdeModulePkg: Add PcdTdxSharedBitMask Min Xu
2021-12-15 8:22 ` Gerd Hoffmann
2021-12-13 12:56 ` [PATCH V4 21/31] UefiCpuPkg: Update AddressEncMask in CpuPageTable Min Xu
2021-12-15 8:38 ` Gerd Hoffmann
2021-12-16 8:23 ` Min Xu
2021-12-13 12:56 ` [PATCH V4 22/31] OvmfPkg: Update PlatformPei to support TDX Min Xu
2021-12-15 8:53 ` Gerd Hoffmann [this message]
2022-01-20 9:07 ` [edk2-devel] " Min Xu
2022-01-13 19:18 ` Vishal Annapurve
2022-01-14 2:23 ` Min Xu
2022-01-14 2:37 ` Vishal Annapurve
2022-01-14 2:40 ` Min Xu
2021-12-13 12:56 ` [PATCH V4 23/31] OvmfPkg: Update AcpiPlatformDxe to alter MADT table Min Xu
2021-12-15 8:54 ` Gerd Hoffmann
2021-12-13 12:56 ` [PATCH V4 24/31] OvmfPkg: Add TdxDxe driver Min Xu
2021-12-15 9:05 ` Gerd Hoffmann
2021-12-13 12:56 ` [PATCH V4 25/31] OvmfPkg/BaseMemEncryptTdxLib: Add TDX helper library Min Xu
2021-12-15 9:16 ` Gerd Hoffmann
2022-01-21 2:54 ` Min Xu
2022-01-21 8:04 ` Gerd Hoffmann
2022-01-21 8:31 ` [edk2-devel] " Min Xu
2021-12-13 12:56 ` [PATCH V4 26/31] OvmfPkg/QemuFwCfgLib: Support Tdx in QemuFwCfgDxe Min Xu
2021-12-15 9:16 ` Gerd Hoffmann
2021-12-13 12:56 ` [PATCH V4 27/31] OvmfPkg: Update IoMmuDxe to support TDX Min Xu
2021-12-15 9:18 ` Gerd Hoffmann
2021-12-13 12:56 ` [PATCH V4 28/31] OvmfPkg: Rename XenTimerDxe to LocalApicTimerDxe Min Xu
2021-12-15 9:19 ` Gerd Hoffmann
2021-12-13 12:57 ` [PATCH V4 29/31] UefiCpuPkg: Setting initial-count register as the last step Min Xu
2021-12-15 9:20 ` Gerd Hoffmann
2021-12-13 12:57 ` [PATCH V4 30/31] OvmfPkg: Switch timer in build time for OvmfPkg Min Xu
2021-12-15 9:21 ` Gerd Hoffmann
2021-12-13 12:57 ` [PATCH V4 31/31] OvmfPkg: Move LocalApicTimerDxe to UefiCpuPkg Min Xu
2021-12-15 9:26 ` Gerd Hoffmann
2021-12-16 8:29 ` [edk2-devel] " Min Xu
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