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[edk2-devel] [PATCH 3/4] MdeModulePkg/DxeIpl: Introduce PCD PcdUse5LevelPageTable

Ni, Ray posted 4 patches 6 years, 6 months ago
There is a newer version of this series
[edk2-devel] [PATCH 3/4] MdeModulePkg/DxeIpl: Introduce PCD PcdUse5LevelPageTable
Posted by Ni, Ray 6 years, 6 months ago 
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=2008

The PCD indicates if 5-Level Paging will be enabled in long mode.
5-Level Paging will not be enabled when the PCD is TRUE but CPU
doesn't support 5-Level Paging.

Signed-off-by: Ray Ni <ray.ni@intel.com>
Cc: Eric Dong <eric.dong@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
---
 MdeModulePkg/MdeModulePkg.dec | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/MdeModulePkg/MdeModulePkg.dec b/MdeModulePkg/MdeModulePkg.dec
index 12e0bbf579..21388595a9 100644
--- a/MdeModulePkg/MdeModulePkg.dec
+++ b/MdeModulePkg/MdeModulePkg.dec
@@ -1991,6 +1991,13 @@ [PcdsFixedAtBuild, PcdsPatchableInModule, PcdsDynamic, PcdsDynamicEx]
   # @Prompt The address mask when memory encryption is enabled.
   gEfiMdeModulePkgTokenSpaceGuid.PcdPteMemoryEncryptionAddressOrMask|0x0|UINT64|0x30001047
 
+  ## Indicates if 5-Level Paging will be enabled in long mode. 5-Level Paging will not be enabled
+  #  when the PCD is TRUE but CPU doesn't support 5-Level Paging.
+  #   TRUE  - 5-Level Paging will be enabled.<BR>
+  #   FALSE - 5-Level Paging will not be enabled.<BR>
+  # @Prompt Enable 5-Level Paging support in long mode. 
+  gEfiMdeModulePkgTokenSpaceGuid.PcdUse5LevelPageTable|FALSE|BOOLEAN|0x0001105F
+
   ## Capsule In Ram is to use memory to deliver the capsules that will be processed after system
   #  reset.<BR><BR>
   #  This PCD indicates if the Capsule In Ram is supported.<BR>
-- 
2.21.0.windows.1


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Re: [edk2-devel] [PATCH 3/4] MdeModulePkg/DxeIpl: Introduce PCD PcdUse5LevelPageTable
Posted by Wu, Hao A 6 years, 6 months ago 
> -----Original Message-----
> From: devel@edk2.groups.io [mailto:devel@edk2.groups.io] On Behalf Of Ni,
> Ray
> Sent: Monday, July 22, 2019 4:16 PM
> To: devel@edk2.groups.io
> Cc: Dong, Eric; Laszlo Ersek
> Subject: [edk2-devel] [PATCH 3/4] MdeModulePkg/DxeIpl: Introduce PCD
> PcdUse5LevelPageTable
> 
> REF: https://bugzilla.tianocore.org/show_bug.cgi?id=2008
> 
> The PCD indicates if 5-Level Paging will be enabled in long mode.
> 5-Level Paging will not be enabled when the PCD is TRUE but CPU
> doesn't support 5-Level Paging.
> 
> Signed-off-by: Ray Ni <ray.ni@intel.com>
> Cc: Eric Dong <eric.dong@intel.com>
> Cc: Laszlo Ersek <lersek@redhat.com>
> ---
>  MdeModulePkg/MdeModulePkg.dec | 7 +++++++


Hello,

Please help to add the PCD description string definitions in MdeModulePkg.uni.

One question, is this PCD introduced for the consideration of memory
consumption by the page table entries? Or is there any other purpose?

Best Regards,
Hao Wu


>  1 file changed, 7 insertions(+)
> 
> diff --git a/MdeModulePkg/MdeModulePkg.dec
> b/MdeModulePkg/MdeModulePkg.dec
> index 12e0bbf579..21388595a9 100644
> --- a/MdeModulePkg/MdeModulePkg.dec
> +++ b/MdeModulePkg/MdeModulePkg.dec
> @@ -1991,6 +1991,13 @@ [PcdsFixedAtBuild, PcdsPatchableInModule,
> PcdsDynamic, PcdsDynamicEx]
>    # @Prompt The address mask when memory encryption is enabled.
> 
> gEfiMdeModulePkgTokenSpaceGuid.PcdPteMemoryEncryptionAddressOrM
> ask|0x0|UINT64|0x30001047
> 
> +  ## Indicates if 5-Level Paging will be enabled in long mode. 5-Level Paging
> will not be enabled
> +  #  when the PCD is TRUE but CPU doesn't support 5-Level Paging.
> +  #   TRUE  - 5-Level Paging will be enabled.<BR>
> +  #   FALSE - 5-Level Paging will not be enabled.<BR>
> +  # @Prompt Enable 5-Level Paging support in long mode.
> +
> gEfiMdeModulePkgTokenSpaceGuid.PcdUse5LevelPageTable|FALSE|BOOLE
> AN|0x0001105F
> +
>    ## Capsule In Ram is to use memory to deliver the capsules that will be
> processed after system
>    #  reset.<BR><BR>
>    #  This PCD indicates if the Capsule In Ram is supported.<BR>
> --
> 2.21.0.windows.1
> 
> 
> 


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Re: [edk2-devel] [PATCH 3/4] MdeModulePkg/DxeIpl: Introduce PCD PcdUse5LevelPageTable
Posted by Ni, Ray 6 years, 6 months ago 
Hao,
Certain OS loaders may fail to boot when 5-level paging is used. PCD can be used to restrict to 4-level paging.

> -----Original Message-----
> From: Wu, Hao A
> Sent: Tuesday, July 23, 2019 10:06 AM
> To: devel@edk2.groups.io; Ni, Ray <ray.ni@intel.com>
> Cc: Dong, Eric <eric.dong@intel.com>; Laszlo Ersek <lersek@redhat.com>
> Subject: RE: [edk2-devel] [PATCH 3/4] MdeModulePkg/DxeIpl: Introduce PCD PcdUse5LevelPageTable
> 
> > -----Original Message-----
> > From: devel@edk2.groups.io [mailto:devel@edk2.groups.io] On Behalf Of Ni,
> > Ray
> > Sent: Monday, July 22, 2019 4:16 PM
> > To: devel@edk2.groups.io
> > Cc: Dong, Eric; Laszlo Ersek
> > Subject: [edk2-devel] [PATCH 3/4] MdeModulePkg/DxeIpl: Introduce PCD
> > PcdUse5LevelPageTable
> >
> > REF: https://bugzilla.tianocore.org/show_bug.cgi?id=2008
> >
> > The PCD indicates if 5-Level Paging will be enabled in long mode.
> > 5-Level Paging will not be enabled when the PCD is TRUE but CPU
> > doesn't support 5-Level Paging.
> >
> > Signed-off-by: Ray Ni <ray.ni@intel.com>
> > Cc: Eric Dong <eric.dong@intel.com>
> > Cc: Laszlo Ersek <lersek@redhat.com>
> > ---
> >  MdeModulePkg/MdeModulePkg.dec | 7 +++++++
> 
> 
> Hello,
> 
> Please help to add the PCD description string definitions in MdeModulePkg.uni.
> 
> One question, is this PCD introduced for the consideration of memory
> consumption by the page table entries? Or is there any other purpose?
> 
> Best Regards,
> Hao Wu
> 
> 
> >  1 file changed, 7 insertions(+)
> >
> > diff --git a/MdeModulePkg/MdeModulePkg.dec
> > b/MdeModulePkg/MdeModulePkg.dec
> > index 12e0bbf579..21388595a9 100644
> > --- a/MdeModulePkg/MdeModulePkg.dec
> > +++ b/MdeModulePkg/MdeModulePkg.dec
> > @@ -1991,6 +1991,13 @@ [PcdsFixedAtBuild, PcdsPatchableInModule,
> > PcdsDynamic, PcdsDynamicEx]
> >    # @Prompt The address mask when memory encryption is enabled.
> >
> > gEfiMdeModulePkgTokenSpaceGuid.PcdPteMemoryEncryptionAddressOrM
> > ask|0x0|UINT64|0x30001047
> >
> > +  ## Indicates if 5-Level Paging will be enabled in long mode. 5-Level Paging
> > will not be enabled
> > +  #  when the PCD is TRUE but CPU doesn't support 5-Level Paging.
> > +  #   TRUE  - 5-Level Paging will be enabled.<BR>
> > +  #   FALSE - 5-Level Paging will not be enabled.<BR>
> > +  # @Prompt Enable 5-Level Paging support in long mode.
> > +
> > gEfiMdeModulePkgTokenSpaceGuid.PcdUse5LevelPageTable|FALSE|BOOLE
> > AN|0x0001105F
> > +
> >    ## Capsule In Ram is to use memory to deliver the capsules that will be
> > processed after system
> >    #  reset.<BR><BR>
> >    #  This PCD indicates if the Capsule In Ram is supported.<BR>
> > --
> > 2.21.0.windows.1
> >
> >
> > 


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Re: [edk2-devel] [PATCH 3/4] MdeModulePkg/DxeIpl: Introduce PCD PcdUse5LevelPageTable
Posted by Dong, Eric 6 years, 6 months ago 
Reviewed-by: Eric Dong <eric.dong@intel.com>

> -----Original Message-----
> From: Ni, Ray
> Sent: Monday, July 22, 2019 4:16 PM
> To: devel@edk2.groups.io
> Cc: Dong, Eric <eric.dong@intel.com>; Laszlo Ersek <lersek@redhat.com>
> Subject: [PATCH 3/4] MdeModulePkg/DxeIpl: Introduce PCD
> PcdUse5LevelPageTable
> 
> REF: https://bugzilla.tianocore.org/show_bug.cgi?id=2008
> 
> The PCD indicates if 5-Level Paging will be enabled in long mode.
> 5-Level Paging will not be enabled when the PCD is TRUE but CPU doesn't
> support 5-Level Paging.
> 
> Signed-off-by: Ray Ni <ray.ni@intel.com>
> Cc: Eric Dong <eric.dong@intel.com>
> Cc: Laszlo Ersek <lersek@redhat.com>
> ---
>  MdeModulePkg/MdeModulePkg.dec | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/MdeModulePkg/MdeModulePkg.dec
> b/MdeModulePkg/MdeModulePkg.dec index 12e0bbf579..21388595a9
> 100644
> --- a/MdeModulePkg/MdeModulePkg.dec
> +++ b/MdeModulePkg/MdeModulePkg.dec
> @@ -1991,6 +1991,13 @@ [PcdsFixedAtBuild, PcdsPatchableInModule,
> PcdsDynamic, PcdsDynamicEx]
>    # @Prompt The address mask when memory encryption is enabled.
> 
> gEfiMdeModulePkgTokenSpaceGuid.PcdPteMemoryEncryptionAddressOrM
> ask|0x0|UINT64|0x30001047
> 
> +  ## Indicates if 5-Level Paging will be enabled in long mode. 5-Level
> + Paging will not be enabled  #  when the PCD is TRUE but CPU doesn't
> support 5-Level Paging.
> +  #   TRUE  - 5-Level Paging will be enabled.<BR>
> +  #   FALSE - 5-Level Paging will not be enabled.<BR>
> +  # @Prompt Enable 5-Level Paging support in long mode.
> +
> +
> gEfiMdeModulePkgTokenSpaceGuid.PcdUse5LevelPageTable|FALSE|BOOLE
> AN|0x0
> + 001105F
> +
>    ## Capsule In Ram is to use memory to deliver the capsules that will be
> processed after system
>    #  reset.<BR><BR>
>    #  This PCD indicates if the Capsule In Ram is supported.<BR>
> --
> 2.21.0.windows.1


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