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
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next prev parent 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
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