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[edk2-devel] [PATCH] ArmPlatformPkg/NorFlashDxe: use correct PCD accessors

Ard Biesheuvel posted 1 patch 3 years, 3 months ago
Failed in applying to current master (apply log)
ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashStandaloneMm.inf |  3 ++-
ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashDxe.c            |  4 ++--
ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashStandaloneMm.c   | 10 +++++-----
3 files changed, 9 insertions(+), 8 deletions(-)
[edk2-devel] [PATCH] ArmPlatformPkg/NorFlashDxe: use correct PCD accessors
Posted by Ard Biesheuvel 3 years, 3 months ago 
Commit 8015f3f6d4005d83 ("ArmPlatformPkg: Enable support for flash in
64-bit address space") updated the NorFlash DXE and StMM drivers to
take alternate PCDs into account when discovering the base of the
NOR flash regions.

This introduced a disparity between the declarations of the PCD references
in the .INF files, which permits the use of dynamic PCDs, and the code
itself, which now uses FixedPcdGet() accessors. On platforms that actually
use dynamic PCDs, this results in a build error.

So let's clean this up:
- for the DXE version, use the generic PcdGet() accessors, so dynamic PCDs
  are permitted
- for the standalone MM version, redeclare the PCDs as [FixedPcd] in the
  .INF description, and switch to the FixedPcdGet() accessors.

Cc: Vijayenthiran Subramaniam <vijayenthiran.subramaniam@arm.com>
Cc: Masahisa Kojima <masahisa.kojima@linaro.org>
Cc: Sami Mujawar <sami.mujawar@arm.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@arm.com>
---
 ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashStandaloneMm.inf |  3 ++-
 ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashDxe.c            |  4 ++--
 ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashStandaloneMm.c   | 10 +++++-----
 3 files changed, 9 insertions(+), 8 deletions(-)

diff --git a/ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashStandaloneMm.inf b/ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashStandaloneMm.inf
index b2f72fb4de20..56347a8bc7c1 100644
--- a/ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashStandaloneMm.inf
+++ b/ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashStandaloneMm.inf
@@ -49,7 +49,7 @@ [Guids]
 [Protocols]
   gEfiSmmFirmwareVolumeBlockProtocolGuid
 
-[Pcd.common]
+[FixedPcd]
   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableBase64
   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableBase
   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableSize
@@ -60,6 +60,7 @@ [Pcd.common]
   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareBase
   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareSize
 
+[FeaturePcd]
   gArmPlatformTokenSpaceGuid.PcdNorFlashCheckBlockLocked
 
 [Depex]
diff --git a/ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashDxe.c b/ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashDxe.c
index 28dc8e125c78..f412731200cf 100644
--- a/ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashDxe.c
+++ b/ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashDxe.c
@@ -422,8 +422,8 @@ NorFlashFvbInitialize (
       EFI_MEMORY_UC | EFI_MEMORY_RUNTIME);
   ASSERT_EFI_ERROR (Status);
 
-  mFlashNvStorageVariableBase = (FixedPcdGet64 (PcdFlashNvStorageVariableBase64) != 0) ?
-    FixedPcdGet64 (PcdFlashNvStorageVariableBase64) : FixedPcdGet32 (PcdFlashNvStorageVariableBase);
+  mFlashNvStorageVariableBase = (PcdGet64 (PcdFlashNvStorageVariableBase64) != 0) ?
+    PcdGet64 (PcdFlashNvStorageVariableBase64) : PcdGet32 (PcdFlashNvStorageVariableBase);
 
   // Set the index of the first LBA for the FVB
   Instance->StartLba = (mFlashNvStorageVariableBase - Instance->RegionBaseAddress) / Instance->Media.BlockSize;
diff --git a/ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashStandaloneMm.c b/ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashStandaloneMm.c
index 8a4fb395d286..4ebbc06e1de3 100644
--- a/ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashStandaloneMm.c
+++ b/ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashStandaloneMm.c
@@ -299,15 +299,15 @@ NorFlashInitialise (
   for (Index = 0; Index < mNorFlashDeviceCount; Index++) {
     // Check if this NOR Flash device contain the variable storage region
 
-   if (PcdGet64 (PcdFlashNvStorageVariableBase64) != 0) {
+   if (FixedPcdGet64 (PcdFlashNvStorageVariableBase64) != 0) {
      ContainVariableStorage =
-       (NorFlashDevices[Index].RegionBaseAddress <= PcdGet64 (PcdFlashNvStorageVariableBase64)) &&
-       (PcdGet64 (PcdFlashNvStorageVariableBase64) + PcdGet32 (PcdFlashNvStorageVariableSize) <=
+       (NorFlashDevices[Index].RegionBaseAddress <= FixedPcdGet64 (PcdFlashNvStorageVariableBase64)) &&
+       (FixedPcdGet64 (PcdFlashNvStorageVariableBase64) + FixedPcdGet32 (PcdFlashNvStorageVariableSize) <=
         NorFlashDevices[Index].RegionBaseAddress + NorFlashDevices[Index].Size);
    } else {
      ContainVariableStorage =
-       (NorFlashDevices[Index].RegionBaseAddress <= PcdGet32 (PcdFlashNvStorageVariableBase)) &&
-       (PcdGet32 (PcdFlashNvStorageVariableBase) + PcdGet32 (PcdFlashNvStorageVariableSize) <=
+       (NorFlashDevices[Index].RegionBaseAddress <= FixedPcdGet32 (PcdFlashNvStorageVariableBase)) &&
+       (FixedPcdGet32 (PcdFlashNvStorageVariableBase) + FixedPcdGet32 (PcdFlashNvStorageVariableSize) <=
         NorFlashDevices[Index].RegionBaseAddress + NorFlashDevices[Index].Size);
   }
 
-- 
2.17.1



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Re: [edk2-devel] [PATCH] ArmPlatformPkg/NorFlashDxe: use correct PCD accessors
Posted by Laszlo Ersek 3 years, 3 months ago 
On 01/11/21 11:57, Ard Biesheuvel wrote:
> Commit 8015f3f6d4005d83 ("ArmPlatformPkg: Enable support for flash in
> 64-bit address space") updated the NorFlash DXE and StMM drivers to
> take alternate PCDs into account when discovering the base of the
> NOR flash regions.
> 
> This introduced a disparity between the declarations of the PCD references
> in the .INF files, which permits the use of dynamic PCDs, and the code
> itself, which now uses FixedPcdGet() accessors. On platforms that actually
> use dynamic PCDs, this results in a build error.
> 
> So let's clean this up:
> - for the DXE version, use the generic PcdGet() accessors, so dynamic PCDs
>   are permitted
> - for the standalone MM version, redeclare the PCDs as [FixedPcd] in the
>   .INF description, and switch to the FixedPcdGet() accessors.
> 
> Cc: Vijayenthiran Subramaniam <vijayenthiran.subramaniam@arm.com>
> Cc: Masahisa Kojima <masahisa.kojima@linaro.org>
> Cc: Sami Mujawar <sami.mujawar@arm.com>
> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@arm.com>
> ---
>  ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashStandaloneMm.inf |  3 ++-
>  ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashDxe.c            |  4 ++--
>  ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashStandaloneMm.c   | 10 +++++-----
>  3 files changed, 9 insertions(+), 8 deletions(-)

Looks justified to me.

Acked-by: Laszlo Ersek <lersek@redhat.com>

Thanks,
Laszlo

> diff --git a/ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashStandaloneMm.inf b/ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashStandaloneMm.inf
> index b2f72fb4de20..56347a8bc7c1 100644
> --- a/ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashStandaloneMm.inf
> +++ b/ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashStandaloneMm.inf
> @@ -49,7 +49,7 @@ [Guids]
>  [Protocols]
>    gEfiSmmFirmwareVolumeBlockProtocolGuid
>  
> -[Pcd.common]
> +[FixedPcd]
>    gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableBase64
>    gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableBase
>    gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableSize
> @@ -60,6 +60,7 @@ [Pcd.common]
>    gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareBase
>    gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareSize
>  
> +[FeaturePcd]
>    gArmPlatformTokenSpaceGuid.PcdNorFlashCheckBlockLocked
>  
>  [Depex]
> diff --git a/ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashDxe.c b/ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashDxe.c
> index 28dc8e125c78..f412731200cf 100644
> --- a/ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashDxe.c
> +++ b/ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashDxe.c
> @@ -422,8 +422,8 @@ NorFlashFvbInitialize (
>        EFI_MEMORY_UC | EFI_MEMORY_RUNTIME);
>    ASSERT_EFI_ERROR (Status);
>  
> -  mFlashNvStorageVariableBase = (FixedPcdGet64 (PcdFlashNvStorageVariableBase64) != 0) ?
> -    FixedPcdGet64 (PcdFlashNvStorageVariableBase64) : FixedPcdGet32 (PcdFlashNvStorageVariableBase);
> +  mFlashNvStorageVariableBase = (PcdGet64 (PcdFlashNvStorageVariableBase64) != 0) ?
> +    PcdGet64 (PcdFlashNvStorageVariableBase64) : PcdGet32 (PcdFlashNvStorageVariableBase);
>  
>    // Set the index of the first LBA for the FVB
>    Instance->StartLba = (mFlashNvStorageVariableBase - Instance->RegionBaseAddress) / Instance->Media.BlockSize;
> diff --git a/ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashStandaloneMm.c b/ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashStandaloneMm.c
> index 8a4fb395d286..4ebbc06e1de3 100644
> --- a/ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashStandaloneMm.c
> +++ b/ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashStandaloneMm.c
> @@ -299,15 +299,15 @@ NorFlashInitialise (
>    for (Index = 0; Index < mNorFlashDeviceCount; Index++) {
>      // Check if this NOR Flash device contain the variable storage region
>  
> -   if (PcdGet64 (PcdFlashNvStorageVariableBase64) != 0) {
> +   if (FixedPcdGet64 (PcdFlashNvStorageVariableBase64) != 0) {
>       ContainVariableStorage =
> -       (NorFlashDevices[Index].RegionBaseAddress <= PcdGet64 (PcdFlashNvStorageVariableBase64)) &&
> -       (PcdGet64 (PcdFlashNvStorageVariableBase64) + PcdGet32 (PcdFlashNvStorageVariableSize) <=
> +       (NorFlashDevices[Index].RegionBaseAddress <= FixedPcdGet64 (PcdFlashNvStorageVariableBase64)) &&
> +       (FixedPcdGet64 (PcdFlashNvStorageVariableBase64) + FixedPcdGet32 (PcdFlashNvStorageVariableSize) <=
>          NorFlashDevices[Index].RegionBaseAddress + NorFlashDevices[Index].Size);
>     } else {
>       ContainVariableStorage =
> -       (NorFlashDevices[Index].RegionBaseAddress <= PcdGet32 (PcdFlashNvStorageVariableBase)) &&
> -       (PcdGet32 (PcdFlashNvStorageVariableBase) + PcdGet32 (PcdFlashNvStorageVariableSize) <=
> +       (NorFlashDevices[Index].RegionBaseAddress <= FixedPcdGet32 (PcdFlashNvStorageVariableBase)) &&
> +       (FixedPcdGet32 (PcdFlashNvStorageVariableBase) + FixedPcdGet32 (PcdFlashNvStorageVariableSize) <=
>          NorFlashDevices[Index].RegionBaseAddress + NorFlashDevices[Index].Size);
>    }
>  
> 



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Re: [edk2-devel] [PATCH] ArmPlatformPkg/NorFlashDxe: use correct PCD accessors
Posted by Vijayenthiran Subramaniam 3 years, 3 months ago 
On Mon, Jan 11, 2021 at 10:57 AM Ard Biesheuvel <ard.biesheuvel@arm.com> wrote:
>
> Commit 8015f3f6d4005d83 ("ArmPlatformPkg: Enable support for flash in
> 64-bit address space") updated the NorFlash DXE and StMM drivers to
> take alternate PCDs into account when discovering the base of the
> NOR flash regions.
>
> This introduced a disparity between the declarations of the PCD references
> in the .INF files, which permits the use of dynamic PCDs, and the code
> itself, which now uses FixedPcdGet() accessors. On platforms that actually
> use dynamic PCDs, this results in a build error.
>
> So let's clean this up:
> - for the DXE version, use the generic PcdGet() accessors, so dynamic PCDs
>   are permitted
> - for the standalone MM version, redeclare the PCDs as [FixedPcd] in the
>   .INF description, and switch to the FixedPcdGet() accessors.
>
> Cc: Vijayenthiran Subramaniam <vijayenthiran.subramaniam@arm.com>
> Cc: Masahisa Kojima <masahisa.kojima@linaro.org>
> Cc: Sami Mujawar <sami.mujawar@arm.com>
> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@arm.com>

I've tested this change on Arm Reference Design platforms (SgiPkg).
Tested-by: Vijayenthiran Subramaniam <vijayenthiran.subramaniam@arm.com>

Also, can you let us know which platform (that used dynamic PCD) broke the
build?

Thanks,
Vijay

> ---
>  ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashStandaloneMm.inf |  3 ++-
>  ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashDxe.c            |  4 ++--
>  ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashStandaloneMm.c   | 10 +++++-----
>  3 files changed, 9 insertions(+), 8 deletions(-)
>
> diff --git a/ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashStandaloneMm.inf b/ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashStandaloneMm.inf
> index b2f72fb4de20..56347a8bc7c1 100644
> --- a/ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashStandaloneMm.inf
> +++ b/ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashStandaloneMm.inf
> @@ -49,7 +49,7 @@ [Guids]
>  [Protocols]
>    gEfiSmmFirmwareVolumeBlockProtocolGuid
>
> -[Pcd.common]
> +[FixedPcd]
>    gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableBase64
>    gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableBase
>    gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableSize
> @@ -60,6 +60,7 @@ [Pcd.common]
>    gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareBase
>    gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareSize
>
> +[FeaturePcd]
>    gArmPlatformTokenSpaceGuid.PcdNorFlashCheckBlockLocked
>
>  [Depex]
> diff --git a/ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashDxe.c b/ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashDxe.c
> index 28dc8e125c78..f412731200cf 100644
> --- a/ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashDxe.c
> +++ b/ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashDxe.c
> @@ -422,8 +422,8 @@ NorFlashFvbInitialize (
>        EFI_MEMORY_UC | EFI_MEMORY_RUNTIME);
>    ASSERT_EFI_ERROR (Status);
>
> -  mFlashNvStorageVariableBase = (FixedPcdGet64 (PcdFlashNvStorageVariableBase64) != 0) ?
> -    FixedPcdGet64 (PcdFlashNvStorageVariableBase64) : FixedPcdGet32 (PcdFlashNvStorageVariableBase);
> +  mFlashNvStorageVariableBase = (PcdGet64 (PcdFlashNvStorageVariableBase64) != 0) ?
> +    PcdGet64 (PcdFlashNvStorageVariableBase64) : PcdGet32 (PcdFlashNvStorageVariableBase);
>
>    // Set the index of the first LBA for the FVB
>    Instance->StartLba = (mFlashNvStorageVariableBase - Instance->RegionBaseAddress) / Instance->Media.BlockSize;
> diff --git a/ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashStandaloneMm.c b/ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashStandaloneMm.c
> index 8a4fb395d286..4ebbc06e1de3 100644
> --- a/ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashStandaloneMm.c
> +++ b/ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashStandaloneMm.c
> @@ -299,15 +299,15 @@ NorFlashInitialise (
>    for (Index = 0; Index < mNorFlashDeviceCount; Index++) {
>      // Check if this NOR Flash device contain the variable storage region
>
> -   if (PcdGet64 (PcdFlashNvStorageVariableBase64) != 0) {
> +   if (FixedPcdGet64 (PcdFlashNvStorageVariableBase64) != 0) {
>       ContainVariableStorage =
> -       (NorFlashDevices[Index].RegionBaseAddress <= PcdGet64 (PcdFlashNvStorageVariableBase64)) &&
> -       (PcdGet64 (PcdFlashNvStorageVariableBase64) + PcdGet32 (PcdFlashNvStorageVariableSize) <=
> +       (NorFlashDevices[Index].RegionBaseAddress <= FixedPcdGet64 (PcdFlashNvStorageVariableBase64)) &&
> +       (FixedPcdGet64 (PcdFlashNvStorageVariableBase64) + FixedPcdGet32 (PcdFlashNvStorageVariableSize) <=
>          NorFlashDevices[Index].RegionBaseAddress + NorFlashDevices[Index].Size);
>     } else {
>       ContainVariableStorage =
> -       (NorFlashDevices[Index].RegionBaseAddress <= PcdGet32 (PcdFlashNvStorageVariableBase)) &&
> -       (PcdGet32 (PcdFlashNvStorageVariableBase) + PcdGet32 (PcdFlashNvStorageVariableSize) <=
> +       (NorFlashDevices[Index].RegionBaseAddress <= FixedPcdGet32 (PcdFlashNvStorageVariableBase)) &&
> +       (FixedPcdGet32 (PcdFlashNvStorageVariableBase) + FixedPcdGet32 (PcdFlashNvStorageVariableSize) <=
>          NorFlashDevices[Index].RegionBaseAddress + NorFlashDevices[Index].Size);
>    }
>
> --
> 2.17.1
>
>
>
> 
>
>


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Re: [edk2-devel] [PATCH] ArmPlatformPkg/NorFlashDxe: use correct PCD accessors
Posted by Philippe Mathieu-Daudé 3 years, 3 months ago 
Hi Ard,

On 1/11/21 11:57 AM, Ard Biesheuvel wrote:
> Commit 8015f3f6d4005d83 ("ArmPlatformPkg: Enable support for flash in
> 64-bit address space") updated the NorFlash DXE and StMM drivers to
> take alternate PCDs into account when discovering the base of the
> NOR flash regions.
> 
> This introduced a disparity between the declarations of the PCD references
> in the .INF files, which permits the use of dynamic PCDs, and the code
> itself, which now uses FixedPcdGet() accessors. On platforms that actually
> use dynamic PCDs, this results in a build error.

So there is no (mainstream) CI coverage for these platforms?
Could we add at least one?

Thanks,

Phil.



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Re: [edk2-devel] [PATCH] ArmPlatformPkg/NorFlashDxe: use correct PCD accessors
Posted by Ard Biesheuvel 3 years, 3 months ago 
On 1/12/21 12:42 PM, Philippe Mathieu-Daudé wrote:
> Hi Ard,
> 
> On 1/11/21 11:57 AM, Ard Biesheuvel wrote:
>> Commit 8015f3f6d4005d83 ("ArmPlatformPkg: Enable support for flash in
>> 64-bit address space") updated the NorFlash DXE and StMM drivers to
>> take alternate PCDs into account when discovering the base of the
>> NOR flash regions.
>>
>> This introduced a disparity between the declarations of the PCD references
>> in the .INF files, which permits the use of dynamic PCDs, and the code
>> itself, which now uses FixedPcdGet() accessors. On platforms that actually
>> use dynamic PCDs, this results in a build error.
> 
> So there is no (mainstream) CI coverage for these platforms?
> Could we add at least one?
> 

We could. It was KvmTool.dsc, which lives in the main repo.



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Re: [edk2-devel] [PATCH] ArmPlatformPkg/NorFlashDxe: use correct PCD accessors
Posted by Sami Mujawar 3 years, 3 months ago 
Hi Ard, Philippe,

I will check if the Kvmtool.dsc build can be supported using the edk2 Core CI.

Regards,

Sami Mujawar

-----Original Message-----
From: Ard Biesheuvel <ard.biesheuvel@arm.com>
Sent: 12 January 2021 12:10 PM
To: Philippe Mathieu-Daudé <philmd@redhat.com>; devel@edk2.groups.io
Cc: leif@nuviainc.com; Vijayenthiran Subramaniam <Vijayenthiran.Subramaniam@arm.com>; Masahisa Kojima <masahisa.kojima@linaro.org>; Sami Mujawar <Sami.Mujawar@arm.com>; Michael D Kinney <michael.d.kinney@intel.com>
Subject: Re: [edk2-devel] [PATCH] ArmPlatformPkg/NorFlashDxe: use correct PCD accessors

On 1/12/21 12:42 PM, Philippe Mathieu-Daudé wrote:
> Hi Ard,
>
> On 1/11/21 11:57 AM, Ard Biesheuvel wrote:
>> Commit 8015f3f6d4005d83 ("ArmPlatformPkg: Enable support for flash in
>> 64-bit address space") updated the NorFlash DXE and StMM drivers to
>> take alternate PCDs into account when discovering the base of the
>> NOR flash regions.
>>
>> This introduced a disparity between the declarations of the PCD references
>> in the .INF files, which permits the use of dynamic PCDs, and the code
>> itself, which now uses FixedPcdGet() accessors. On platforms that actually
>> use dynamic PCDs, this results in a build error.
>
> So there is no (mainstream) CI coverage for these platforms?
> Could we add at least one?
>

We could. It was KvmTool.dsc, which lives in the main repo.

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