Re: [PATCH] IntelSiliconPkg IntelVTdDxe: Do not SetupVtd again

["Yao, Jiewen" <jiewen.yao@intel.com>]

Tested-by: Jiewen.yao@intel.com
Reviewed-by: Jiewen.yao@intel.com


> -----Original Message-----
> From: Zeng, Star
> Sent: Thursday, November 23, 2017 9:11 AM
> To: edk2-devel@lists.01.org
> Cc: Zeng, Star <star.zeng@intel.com>; Yao, Jiewen <jiewen.yao@intel.com>
> Subject: [PATCH] IntelSiliconPkg IntelVTdDxe: Do not SetupVtd again
> 
> Cc: Jiewen Yao <jiewen.yao@intel.com>
> Contributed-under: TianoCore Contribution Agreement 1.1
> Signed-off-by: Star Zeng <star.zeng@intel.com>
> ---
>  IntelSiliconPkg/Feature/VTd/IntelVTdDxe/DmaProtection.c | 3 +++
>  IntelSiliconPkg/Feature/VTd/IntelVTdDxe/DmaProtection.h | 5 +++--
>  IntelSiliconPkg/Feature/VTd/IntelVTdDxe/DmarAcpiTable.c | 7 ++++---
>  3 files changed, 10 insertions(+), 5 deletions(-)
> 
> diff --git a/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/DmaProtection.c
> b/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/DmaProtection.c
> index 6052a0aebe45..37b3b19bce90 100644
> --- a/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/DmaProtection.c
> +++ b/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/DmaProtection.c
> @@ -412,6 +412,9 @@ AcpiNotificationFunc (
> 
>    Status = GetDmarAcpiTable ();
>    if (EFI_ERROR (Status)) {
> +    if (Status == EFI_ALREADY_STARTED) {
> +      gBS->CloseEvent (Event);
> +    }
>      return;
>    }
>    SetupVtd ();
> diff --git a/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/DmaProtection.h
> b/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/DmaProtection.h
> index 0886647ea673..519a5ab00450 100644
> --- a/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/DmaProtection.h
> +++ b/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/DmaProtection.h
> @@ -302,8 +302,9 @@ FindVtdIndexByPciDevice (
>  /**
>    Get the DMAR ACPI table.
> 
> -  @retval EFI_SUCCESS    The DMAR ACPI table is got.
> -  @retval EFI_NOT_FOUND  The DMAR ACPI table is not found.
> +  @retval EFI_SUCCESS           The DMAR ACPI table is got.
> +  @retval EFI_ALREADY_STARTED   The DMAR ACPI table has been got
> previously.
> +  @retval EFI_NOT_FOUND         The DMAR ACPI table is not found.
>  **/
>  EFI_STATUS
>  GetDmarAcpiTable (
> diff --git a/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/DmarAcpiTable.c
> b/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/DmarAcpiTable.c
> index 81dec109675b..ce350bafbe3f 100644
> --- a/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/DmarAcpiTable.c
> +++ b/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/DmarAcpiTable.c
> @@ -978,8 +978,9 @@ FindAcpiPtr (
>  /**
>    Get the DMAR ACPI table.
> 
> -  @retval EFI_SUCCESS    The DMAR ACPI table is got.
> -  @retval EFI_NOT_FOUND  The DMAR ACPI table is not found.
> +  @retval EFI_SUCCESS           The DMAR ACPI table is got.
> +  @retval EFI_ALREADY_STARTED   The DMAR ACPI table has been got
> previously.
> +  @retval EFI_NOT_FOUND         The DMAR ACPI table is not found.
>  **/
>  EFI_STATUS
>  GetDmarAcpiTable (
> @@ -990,7 +991,7 @@ GetDmarAcpiTable (
>    EFI_STATUS                        Status;
> 
>    if (mAcpiDmarTable != NULL) {
> -    return EFI_SUCCESS;
> +    return EFI_ALREADY_STARTED;
>    }
> 
>    AcpiTable = NULL;
> --
> 2.7.0.windows.1