public inbox for devel@edk2.groups.io
 help / color / mirror / Atom feed
From: Fan Jeff <vanjeff_919@hotmail.com>
To: "Wang, Jian J" <jian.j.wang@intel.com>,
	"Yao, Jiewen" <jiewen.yao@intel.com>,
	"edk2-devel@lists.01.org" <edk2-devel@lists.01.org>
Cc: "Dong, Eric" <eric.dong@intel.com>, "Zeng, Star" <star.zeng@intel.com>
Subject: 答复: [PATCH v2 2/8] MdeModulePkg/CpuExceptionHandlerLib.h: Add a new API
Date: Sat, 25 Nov 2017 13:17:55 +0000	[thread overview]
Message-ID: <CO2PR19MB01372977D61FE89FA2C954B2D7270@CO2PR19MB0137.namprd19.prod.outlook.com> (raw)
In-Reply-To: <D827630B58408649ACB04F44C510003624CB5DD5@SHSMSX103.ccr.corp.intel.com>

Hi,



I am not sure if this is good idea to define such arch specific definitions in MdeModulePkg. Moreover, we don’t know how ARM or other processors define this definition, either.



Jeff



________________________________
From: edk2-devel <edk2-devel-bounces@lists.01.org> on behalf of Wang, Jian J <jian.j.wang@intel.com>
Sent: Thursday, November 23, 2017 1:06:53 PM
To: Yao, Jiewen; edk2-devel@lists.01.org
Cc: Dong, Eric; Zeng, Star
Subject: Re: [edk2] [PATCH v2 2/8] MdeModulePkg/CpuExceptionHandlerLib.h: Add a new API

Good idea. I think it should be defined in also in following file besides the new API

MdeModulePkg\Include\Library\CpuExceptionHandlerLib.h

> -----Original Message-----
> From: Yao, Jiewen
> Sent: Thursday, November 23, 2017 12:08 PM
> To: Wang, Jian J <jian.j.wang@intel.com>; edk2-devel@lists.01.org
> Cc: Dong, Eric <eric.dong@intel.com>; Zeng, Star <star.zeng@intel.com>
> Subject: RE: [edk2] [PATCH v2 2/8] MdeModulePkg/CpuExceptionHandlerLib.h:
> Add a new API
>
> Hi
> I am a little worried about the way to use VOID * to pass arch dependent data.
>
> Can we define it clearly in each ARCH in the header file, and use a UNION to
> include all arch?
>
> I think both the caller and the callee need parse it. As such, VOID * is not a good
> way.
>
> Thank you
> Yao Jiewen
>
> > -----Original Message-----
> > From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On Behalf Of Jian
> J
> > Wang
> > Sent: Wednesday, November 22, 2017 4:46 PM
> > To: edk2-devel@lists.01.org
> > Cc: Yao, Jiewen <jiewen.yao@intel.com>; Dong, Eric <eric.dong@intel.com>;
> > Zeng, Star <star.zeng@intel.com>
> > Subject: [edk2] [PATCH v2 2/8] MdeModulePkg/CpuExceptionHandlerLib.h:
> Add
> > a new API
> >
> > > v2:
> > >    Add prototype definition of InitializeCpuExceptionStackSwitchHandlers()
> >
> > A new API InitializeCpuExceptionStackSwitchHandlers() is introduced to
> support
> > initializing exception handlers being able to switch stack. StackSwitchData is
> > arch dependent and required by IA32 processor to convey resources reserved
> in
> > advance. This is necessary because the CpuExceptionHandlerLib will be linked
> > in different phases, in which there's no common way to reserve resources.
> >
> > EFI_STATUS
> > EFIAPI
> > InitializeCpuExceptionStackSwitchHandlers (
> >   IN VOID       *StackSwitchData  OPTIONAL
> >   );
> >
> > Cc: Star Zeng <star.zeng@intel.com>
> > Cc: Eric Dong <eric.dong@intel.com>
> > Cc: Jiewen Yao <jiewen.yao@intel.com>
> > Suggested-by: Ayellet Wolman <ayellet.wolman@intel.com>
> > Contributed-under: TianoCore Contribution Agreement 1.1
> > Signed-off-by: Jian J Wang <jian.j.wang@intel.com>
> > ---
> >  MdeModulePkg/Include/Library/CpuExceptionHandlerLib.h | 18
> > ++++++++++++++++++
> >  1 file changed, 18 insertions(+)
> >
> > diff --git a/MdeModulePkg/Include/Library/CpuExceptionHandlerLib.h
> > b/MdeModulePkg/Include/Library/CpuExceptionHandlerLib.h
> > index 6cd8230127..68de4850e1 100644
> > --- a/MdeModulePkg/Include/Library/CpuExceptionHandlerLib.h
> > +++ b/MdeModulePkg/Include/Library/CpuExceptionHandlerLib.h
> > @@ -41,6 +41,24 @@ InitializeCpuExceptionHandlers (
> >    IN EFI_VECTOR_HANDOFF_INFO       *VectorInfo OPTIONAL
> >    );
> >
> > +/**
> > +  Setup separate stack for given exceptions. StackSwitchData is optional and
> its
> > +  content depends one the specific arch of CPU.
> > +
> > +  @param[in] StackSwitchData      Pointer to data required for setuping up
> > +                                  stack switch.
> > +
> > +  @retval EFI_SUCCESS             The exceptions have been successfully
> > +                                  initialized.
> > +  @retval EFI_INVALID_PARAMETER   StackSwitchData contains invalid
> > content.
> > +
> > +**/
> > +EFI_STATUS
> > +EFIAPI
> > +InitializeCpuExceptionStackSwitchHandlers (
> > +  IN VOID       *StackSwitchData  OPTIONAL
> > +  );
> > +
> >  /**
> >    Initializes all CPU interrupt/exceptions entries and provides the default
> > interrupt/exception handlers.
> >
> > --
> > 2.14.1.windows.1
> >
> > _______________________________________________
> > edk2-devel mailing list
> > edk2-devel@lists.01.org
> > https://lists.01.org/mailman/listinfo/edk2-devel
_______________________________________________
edk2-devel mailing list
edk2-devel@lists.01.org
https://lists.01.org/mailman/listinfo/edk2-devel

  reply	other threads:[~2017-11-25 13:13 UTC|newest]

Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-11-22  8:45 [PATCH v2 0/8] Implement stack guard feature Jian J Wang
2017-11-22  8:45 ` [PATCH v2 1/8] MdeModulePkg/metafile: Add PCD PcdCpuStackGuard Jian J Wang
2017-11-22  8:45 ` [PATCH v2 2/8] MdeModulePkg/CpuExceptionHandlerLib.h: Add a new API Jian J Wang
2017-11-23  4:07   ` Yao, Jiewen
2017-11-23  5:06     ` Wang, Jian J
2017-11-25 13:17       ` Fan Jeff [this message]
2017-11-27  2:20         ` Wang, Jian J
2017-11-22  8:45 ` [PATCH v2 3/8] MdePkg/BaseLib: Add stack switch related definitions for IA32 Jian J Wang
2017-11-22  8:45 ` [PATCH v2 4/8] MdeModulePkg/DxeIpl: Enable paging for Stack Guard Jian J Wang
2017-11-22  8:45 ` [PATCH v2 5/8] UefiCpuPkg/UefiCpuPkg.dec: Add two new PCDs for stack switch Jian J Wang
2017-11-22  8:45 ` [PATCH v2 6/8] UefiCpuPkg/MpLib: Add GDTR, IDTR and TR in saved AP data Jian J Wang
2017-11-22  8:45 ` [PATCH v2 7/8] UefiCpuPkg/CpuExceptionHandlerLib: Add stack switch support Jian J Wang
2017-11-23  5:50   ` Yao, Jiewen
2017-11-23  5:59     ` Yao, Jiewen
2017-11-23  6:09       ` Wang, Jian J
2017-11-23  6:25         ` Yao, Jiewen
2017-11-23  7:54           ` Wang, Jian J
2017-11-23  6:05     ` Wang, Jian J
2017-11-23  6:16       ` Yao, Jiewen
2017-11-23  6:43         ` Wang, Jian J
2017-11-25 13:27           ` 答复: " Fan Jeff
2017-11-27  2:21             ` Wang, Jian J
2017-11-28  1:38           ` Wang, Jian J
2017-11-28  2:06             ` Yao, Jiewen
2017-11-25 13:35   ` 答复: " Fan Jeff
2017-11-22  8:45 ` [PATCH v2 8/8] UefiCpuPkg/CpuDxe: Initialize stack switch for MP Jian J Wang
2017-11-23  4:13   ` Yao, Jiewen
2017-11-23  5:03     ` Wang, Jian J
2017-11-23  5:19       ` Wang, Jian J
2017-11-23  5:39         ` Yao, Jiewen
2017-11-23  3:47 ` [PATCH v2 0/8] Implement stack guard feature Yao, Jiewen
2017-11-23  5:09   ` Wang, Jian J
2017-11-23  5:40     ` Yao, Jiewen
2017-11-25 13:44       ` 答复: " Fan Jeff
2017-11-25 13:55         ` Yao, Jiewen

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-list from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=CO2PR19MB01372977D61FE89FA2C954B2D7270@CO2PR19MB0137.namprd19.prod.outlook.com \
    --to=devel@edk2.groups.io \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox