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* [edk2-devel] [PATCH V2] UefiCpuPkg/CpuDxe: Fix boot error
@ 2021-01-07  3:10 Guo Dong
  2021-01-07 11:56 ` Laszlo Ersek
                   ` (2 more replies)
  0 siblings, 3 replies; 8+ messages in thread
From: Guo Dong @ 2021-01-07  3:10 UTC (permalink / raw)
  To: devel; +Cc: eric.dong, ray.ni, lersek, rahul1.kumar

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3084

When DXE drivers are dispatched above 4GB memory in 64bit
mode, the address setCodeSelectorLongJump in stack will
be override by parameter. Jump to Qword is not supported
by some processors. So use "o64 retf" instead.

Signed-off-by: Guo Dong <guo.dong@intel.com>
---
 UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm b/UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm
index c3489bcc3e..a8216cd56f 100644
--- a/UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm
+++ b/UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm
@@ -20,13 +20,11 @@
 ;------------------------------------------------------------------------------
 global ASM_PFX(SetCodeSelector)
 ASM_PFX(SetCodeSelector):
-    sub     rsp, 0x10
+    push    rcx,
     lea     rax, [setCodeSelectorLongJump]
-    mov     [rsp], rax
-    mov     [rsp+4], cx
-    jmp     dword far [rsp]
+    push    rax
+    o64 retf
 setCodeSelectorLongJump:
-    add     rsp, 0x10
     ret
 
 ;------------------------------------------------------------------------------
-- 
2.16.2.windows.1


^ permalink raw reply related	[flat|nested] 8+ messages in thread

* Re: [edk2-devel] [PATCH V2] UefiCpuPkg/CpuDxe: Fix boot error
  2021-01-07  3:10 [edk2-devel] [PATCH V2] UefiCpuPkg/CpuDxe: Fix boot error Guo Dong
@ 2021-01-07 11:56 ` Laszlo Ersek
  2021-01-07 22:25   ` James Bottomley
  2021-01-07 15:01 ` Lendacky, Thomas
  2021-01-07 18:22 ` Michael D Kinney
  2 siblings, 1 reply; 8+ messages in thread
From: Laszlo Ersek @ 2021-01-07 11:56 UTC (permalink / raw)
  To: Guo Dong, devel
  Cc: eric.dong, ray.ni, rahul1.kumar, Tom Lendacky, James Bottomley,
	Michael Kinney

Adding James, Mike, and Tom:

On 01/07/21 04:10, Guo Dong wrote:
> REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3084
> 
> When DXE drivers are dispatched above 4GB memory in 64bit
> mode, the address setCodeSelectorLongJump in stack will
> be override by parameter. Jump to Qword is not supported
> by some processors. So use "o64 retf" instead.
> 
> Signed-off-by: Guo Dong <guo.dong@intel.com>
> ---
>  UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm | 8 +++-----
>  1 file changed, 3 insertions(+), 5 deletions(-)
> 
> diff --git a/UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm b/UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm
> index c3489bcc3e..a8216cd56f 100644
> --- a/UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm
> +++ b/UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm
> @@ -20,13 +20,11 @@
>  ;------------------------------------------------------------------------------
>  global ASM_PFX(SetCodeSelector)
>  ASM_PFX(SetCodeSelector):
> -    sub     rsp, 0x10
> +    push    rcx,
>      lea     rax, [setCodeSelectorLongJump]
> -    mov     [rsp], rax
> -    mov     [rsp+4], cx
> -    jmp     dword far [rsp]
> +    push    rax
> +    o64 retf
>  setCodeSelectorLongJump:
> -    add     rsp, 0x10
>      ret
>  
>  ;------------------------------------------------------------------------------
> 

I'm asking for:

- a Reviewed-by or Tested-by from James please, and
- an Acked-by or Reviewed-by from Mike please, and
- a Reviewed-by or Tested-by from Tom please.

Personally I'm not going to verify the details of the conversion of the
mode switch, from the far jump to the far ret, but squinting from a
distance, the patch looks plausible.

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

Thanks!
Laszlo


^ permalink raw reply	[flat|nested] 8+ messages in thread

* Re: [edk2-devel] [PATCH V2] UefiCpuPkg/CpuDxe: Fix boot error
  2021-01-07  3:10 [edk2-devel] [PATCH V2] UefiCpuPkg/CpuDxe: Fix boot error Guo Dong
  2021-01-07 11:56 ` Laszlo Ersek
@ 2021-01-07 15:01 ` Lendacky, Thomas
  2021-01-07 16:14   ` Guo Dong
  2021-01-07 18:22 ` Michael D Kinney
  2 siblings, 1 reply; 8+ messages in thread
From: Lendacky, Thomas @ 2021-01-07 15:01 UTC (permalink / raw)
  To: devel, guo.dong; +Cc: eric.dong, ray.ni, lersek, rahul1.kumar

On 1/6/21 9:10 PM, Guo Dong via groups.io wrote:
> REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3084
> 
> When DXE drivers are dispatched above 4GB memory in 64bit
> mode, the address setCodeSelectorLongJump in stack will
> be override by parameter. Jump to Qword is not supported
> by some processors. So use "o64 retf" instead.
> 
> Signed-off-by: Guo Dong <guo.dong@intel.com>

With one little comment below, I verified this method allows my system to 
boot.

Tested-by: Tom Lendacky <thomas.lendacky@amd.com>

> ---
>   UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm | 8 +++-----
>   1 file changed, 3 insertions(+), 5 deletions(-)
> 
> diff --git a/UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm b/UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm
> index c3489bcc3e..a8216cd56f 100644
> --- a/UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm
> +++ b/UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm
> @@ -20,13 +20,11 @@
>   ;------------------------------------------------------------------------------
>   global ASM_PFX(SetCodeSelector)
>   ASM_PFX(SetCodeSelector):
> -    sub     rsp, 0x10
> +    push    rcx,

Extraneous comma after rcx.

Thanks,
Tom

>       lea     rax, [setCodeSelectorLongJump]
> -    mov     [rsp], rax
> -    mov     [rsp+4], cx
> -    jmp     dword far [rsp]
> +    push    rax
> +    o64 retf
>   setCodeSelectorLongJump:
> -    add     rsp, 0x10
>       ret
>   
>   ;------------------------------------------------------------------------------
> 

^ permalink raw reply	[flat|nested] 8+ messages in thread

* Re: [edk2-devel] [PATCH V2] UefiCpuPkg/CpuDxe: Fix boot error
  2021-01-07 15:01 ` Lendacky, Thomas
@ 2021-01-07 16:14   ` Guo Dong
  2021-01-07 17:32     ` Laszlo Ersek
  0 siblings, 1 reply; 8+ messages in thread
From: Guo Dong @ 2021-01-07 16:14 UTC (permalink / raw)
  To: devel@edk2.groups.io, thomas.lendacky@amd.com
  Cc: Dong, Eric, Ni, Ray, lersek@redhat.com, Kumar, Rahul1


Thanks Tom to help verify this change and point out an extra comma after rcx.
I will remove that extra comma when pushing this patch.
I could send V3 patch if required to remove this extra comma.

Thanks,
Guo

> -----Original Message-----
> From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of Lendacky,
> Thomas
> Sent: Thursday, January 7, 2021 8:02 AM
> To: devel@edk2.groups.io; Dong, Guo <guo.dong@intel.com>
> Cc: Dong, Eric <eric.dong@intel.com>; Ni, Ray <ray.ni@intel.com>;
> lersek@redhat.com; Kumar, Rahul1 <rahul1.kumar@intel.com>
> Subject: Re: [edk2-devel] [PATCH V2] UefiCpuPkg/CpuDxe: Fix boot error
> 
> On 1/6/21 9:10 PM, Guo Dong via groups.io wrote:
> > REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3084
> >
> > When DXE drivers are dispatched above 4GB memory in 64bit
> > mode, the address setCodeSelectorLongJump in stack will
> > be override by parameter. Jump to Qword is not supported
> > by some processors. So use "o64 retf" instead.
> >
> > Signed-off-by: Guo Dong <guo.dong@intel.com>
> 
> With one little comment below, I verified this method allows my system to
> boot.
> 
> Tested-by: Tom Lendacky <thomas.lendacky@amd.com>
> 
> > ---
> >   UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm | 8 +++-----
> >   1 file changed, 3 insertions(+), 5 deletions(-)
> >
> > diff --git a/UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm
> b/UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm
> > index c3489bcc3e..a8216cd56f 100644
> > --- a/UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm
> > +++ b/UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm
> > @@ -20,13 +20,11 @@
> >   ;------------------------------------------------------------------------------
> >   global ASM_PFX(SetCodeSelector)
> >   ASM_PFX(SetCodeSelector):
> > -    sub     rsp, 0x10
> > +    push    rcx,
> 
> Extraneous comma after rcx.
> 
> Thanks,
> Tom
> 
> >       lea     rax, [setCodeSelectorLongJump]
> > -    mov     [rsp], rax
> > -    mov     [rsp+4], cx
> > -    jmp     dword far [rsp]
> > +    push    rax
> > +    o64 retf
> >   setCodeSelectorLongJump:
> > -    add     rsp, 0x10
> >       ret
> >
> >   ;------------------------------------------------------------------------------
> >
> 
> 
> 
> 


^ permalink raw reply	[flat|nested] 8+ messages in thread

* Re: [edk2-devel] [PATCH V2] UefiCpuPkg/CpuDxe: Fix boot error
  2021-01-07 16:14   ` Guo Dong
@ 2021-01-07 17:32     ` Laszlo Ersek
  0 siblings, 0 replies; 8+ messages in thread
From: Laszlo Ersek @ 2021-01-07 17:32 UTC (permalink / raw)
  To: Dong, Guo, devel@edk2.groups.io, thomas.lendacky@amd.com
  Cc: Dong, Eric, Ni, Ray, Kumar, Rahul1

On 01/07/21 17:14, Dong, Guo wrote:
> 
> Thanks Tom to help verify this change and point out an extra comma after rcx.
> I will remove that extra comma when pushing this patch.
> I could send V3 patch if required to remove this extra comma.

I think a v3 is unneeded just for that.

Thanks
Laszlo

> 
> Thanks,
> Guo
> 
>> -----Original Message-----
>> From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of Lendacky,
>> Thomas
>> Sent: Thursday, January 7, 2021 8:02 AM
>> To: devel@edk2.groups.io; Dong, Guo <guo.dong@intel.com>
>> Cc: Dong, Eric <eric.dong@intel.com>; Ni, Ray <ray.ni@intel.com>;
>> lersek@redhat.com; Kumar, Rahul1 <rahul1.kumar@intel.com>
>> Subject: Re: [edk2-devel] [PATCH V2] UefiCpuPkg/CpuDxe: Fix boot error
>>
>> On 1/6/21 9:10 PM, Guo Dong via groups.io wrote:
>>> REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3084
>>>
>>> When DXE drivers are dispatched above 4GB memory in 64bit
>>> mode, the address setCodeSelectorLongJump in stack will
>>> be override by parameter. Jump to Qword is not supported
>>> by some processors. So use "o64 retf" instead.
>>>
>>> Signed-off-by: Guo Dong <guo.dong@intel.com>
>>
>> With one little comment below, I verified this method allows my system to
>> boot.
>>
>> Tested-by: Tom Lendacky <thomas.lendacky@amd.com>
>>
>>> ---
>>>   UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm | 8 +++-----
>>>   1 file changed, 3 insertions(+), 5 deletions(-)
>>>
>>> diff --git a/UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm
>> b/UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm
>>> index c3489bcc3e..a8216cd56f 100644
>>> --- a/UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm
>>> +++ b/UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm
>>> @@ -20,13 +20,11 @@
>>>   ;------------------------------------------------------------------------------
>>>   global ASM_PFX(SetCodeSelector)
>>>   ASM_PFX(SetCodeSelector):
>>> -    sub     rsp, 0x10
>>> +    push    rcx,
>>
>> Extraneous comma after rcx.
>>
>> Thanks,
>> Tom
>>
>>>       lea     rax, [setCodeSelectorLongJump]
>>> -    mov     [rsp], rax
>>> -    mov     [rsp+4], cx
>>> -    jmp     dword far [rsp]
>>> +    push    rax
>>> +    o64 retf
>>>   setCodeSelectorLongJump:
>>> -    add     rsp, 0x10
>>>       ret
>>>
>>>   ;------------------------------------------------------------------------------
>>>
>>
>>
>> 
>>
> 


^ permalink raw reply	[flat|nested] 8+ messages in thread

* Re: [edk2-devel] [PATCH V2] UefiCpuPkg/CpuDxe: Fix boot error
  2021-01-07  3:10 [edk2-devel] [PATCH V2] UefiCpuPkg/CpuDxe: Fix boot error Guo Dong
  2021-01-07 11:56 ` Laszlo Ersek
  2021-01-07 15:01 ` Lendacky, Thomas
@ 2021-01-07 18:22 ` Michael D Kinney
  2 siblings, 0 replies; 8+ messages in thread
From: Michael D Kinney @ 2021-01-07 18:22 UTC (permalink / raw)
  To: devel@edk2.groups.io, Dong, Guo, Kinney, Michael D
  Cc: Dong, Eric, Ni, Ray, lersek@redhat.com, Kumar, Rahul1

Reviewed-by: Michael D Kinney <michael.d.kinney@intel.com>

Mike

> -----Original Message-----
> From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of Guo Dong
> Sent: Wednesday, January 6, 2021 7:11 PM
> To: devel@edk2.groups.io
> Cc: Dong, Eric <eric.dong@intel.com>; Ni, Ray <ray.ni@intel.com>; lersek@redhat.com; Kumar, Rahul1
> <rahul1.kumar@intel.com>
> Subject: [edk2-devel] [PATCH V2] UefiCpuPkg/CpuDxe: Fix boot error
> 
> REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3084
> 
> When DXE drivers are dispatched above 4GB memory in 64bit
> mode, the address setCodeSelectorLongJump in stack will
> be override by parameter. Jump to Qword is not supported
> by some processors. So use "o64 retf" instead.
> 
> Signed-off-by: Guo Dong <guo.dong@intel.com>
> ---
>  UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm | 8 +++-----
>  1 file changed, 3 insertions(+), 5 deletions(-)
> 
> diff --git a/UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm b/UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm
> index c3489bcc3e..a8216cd56f 100644
> --- a/UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm
> +++ b/UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm
> @@ -20,13 +20,11 @@
>  ;------------------------------------------------------------------------------
>  global ASM_PFX(SetCodeSelector)
>  ASM_PFX(SetCodeSelector):
> -    sub     rsp, 0x10
> +    push    rcx,
>      lea     rax, [setCodeSelectorLongJump]
> -    mov     [rsp], rax
> -    mov     [rsp+4], cx
> -    jmp     dword far [rsp]
> +    push    rax
> +    o64 retf
>  setCodeSelectorLongJump:
> -    add     rsp, 0x10
>      ret
> 
>  ;------------------------------------------------------------------------------
> --
> 2.16.2.windows.1
> 
> 
> 
> 
> 


^ permalink raw reply	[flat|nested] 8+ messages in thread

* Re: [edk2-devel] [PATCH V2] UefiCpuPkg/CpuDxe: Fix boot error
  2021-01-07 11:56 ` Laszlo Ersek
@ 2021-01-07 22:25   ` James Bottomley
  2021-01-09  2:30     ` Ni, Ray
  0 siblings, 1 reply; 8+ messages in thread
From: James Bottomley @ 2021-01-07 22:25 UTC (permalink / raw)
  To: devel, lersek, Guo Dong
  Cc: eric.dong, ray.ni, rahul1.kumar, Tom Lendacky, Michael Kinney

On Thu, 2021-01-07 at 12:56 +0100, Laszlo Ersek wrote:
> Adding James, Mike, and Tom:
> 
> On 01/07/21 04:10, Guo Dong wrote:
> > REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3084
> > 
> > When DXE drivers are dispatched above 4GB memory in 64bit
> > mode, the address setCodeSelectorLongJump in stack will
> > be override by parameter. Jump to Qword is not supported
> > by some processors. So use "o64 retf" instead.
> > 
> > Signed-off-by: Guo Dong <guo.dong@intel.com>
> > ---
> >  UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm | 8 +++-----
> >  1 file changed, 3 insertions(+), 5 deletions(-)
> > 
> > diff --git a/UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm
> > b/UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm
> > index c3489bcc3e..a8216cd56f 100644
> > --- a/UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm
> > +++ b/UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm
> > @@ -20,13 +20,11 @@
> >  ;-----------------------------------------------------------------
> > -------------
> >  global ASM_PFX(SetCodeSelector)
> >  ASM_PFX(SetCodeSelector):
> > -    sub     rsp, 0x10
> > +    push    rcx,
> >      lea     rax, [setCodeSelectorLongJump]
> > -    mov     [rsp], rax
> > -    mov     [rsp+4], cx
> > -    jmp     dword far [rsp]
> > +    push    rax
> > +    o64 retf
> >  setCodeSelectorLongJump:
> > -    add     rsp, 0x10
> >      ret
> >  
> >  ;-----------------------------------------------------------------
> > -------------
> > 
> 
> I'm asking for:
> James Bottomley <jejb@linux.ibm.com>
> - a Reviewed-by or Tested-by from James please, and

Tested-by: James Bottomley <jejb@linux.ibm.com>

James



^ permalink raw reply	[flat|nested] 8+ messages in thread

* Re: [edk2-devel] [PATCH V2] UefiCpuPkg/CpuDxe: Fix boot error
  2021-01-07 22:25   ` James Bottomley
@ 2021-01-09  2:30     ` Ni, Ray
  0 siblings, 0 replies; 8+ messages in thread
From: Ni, Ray @ 2021-01-09  2:30 UTC (permalink / raw)
  To: jejb@linux.ibm.com, devel@edk2.groups.io, lersek@redhat.com,
	Dong, Guo
  Cc: Dong, Eric, Kumar, Rahul1, Tom Lendacky, Kinney, Michael D

Reviewed-by: Ray Ni <ray.ni@intel.com>
I will remove the additional comma when creating the pull request.

> -----Original Message-----
> From: James Bottomley <jejb@linux.ibm.com>
> Sent: Friday, January 8, 2021 6:25 AM
> To: devel@edk2.groups.io; lersek@redhat.com; Dong, Guo
> <guo.dong@intel.com>
> Cc: Dong, Eric <eric.dong@intel.com>; Ni, Ray <ray.ni@intel.com>; Kumar,
> Rahul1 <rahul1.kumar@intel.com>; Tom Lendacky
> <thomas.lendacky@amd.com>; Kinney, Michael D
> <michael.d.kinney@intel.com>
> Subject: Re: [edk2-devel] [PATCH V2] UefiCpuPkg/CpuDxe: Fix boot error
> 
> On Thu, 2021-01-07 at 12:56 +0100, Laszlo Ersek wrote:
> > Adding James, Mike, and Tom:
> >
> > On 01/07/21 04:10, Guo Dong wrote:
> > > REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3084
> > >
> > > When DXE drivers are dispatched above 4GB memory in 64bit
> > > mode, the address setCodeSelectorLongJump in stack will
> > > be override by parameter. Jump to Qword is not supported
> > > by some processors. So use "o64 retf" instead.
> > >
> > > Signed-off-by: Guo Dong <guo.dong@intel.com>
> > > ---
> > >  UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm | 8 +++-----
> > >  1 file changed, 3 insertions(+), 5 deletions(-)
> > >
> > > diff --git a/UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm
> > > b/UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm
> > > index c3489bcc3e..a8216cd56f 100644
> > > --- a/UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm
> > > +++ b/UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm
> > > @@ -20,13 +20,11 @@
> > >  ;-----------------------------------------------------------------
> > > -------------
> > >  global ASM_PFX(SetCodeSelector)
> > >  ASM_PFX(SetCodeSelector):
> > > -    sub     rsp, 0x10
> > > +    push    rcx,
> > >      lea     rax, [setCodeSelectorLongJump]
> > > -    mov     [rsp], rax
> > > -    mov     [rsp+4], cx
> > > -    jmp     dword far [rsp]
> > > +    push    rax
> > > +    o64 retf
> > >  setCodeSelectorLongJump:
> > > -    add     rsp, 0x10
> > >      ret
> > >
> > >  ;-----------------------------------------------------------------
> > > -------------
> > >
> >
> > I'm asking for:
> > James Bottomley <jejb@linux.ibm.com>
> > - a Reviewed-by or Tested-by from James please, and
> 
> Tested-by: James Bottomley <jejb@linux.ibm.com>
> 
> James
> 


^ permalink raw reply	[flat|nested] 8+ messages in thread

end of thread, other threads:[~2021-01-09  2:30 UTC | newest]

Thread overview: 8+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2021-01-07  3:10 [edk2-devel] [PATCH V2] UefiCpuPkg/CpuDxe: Fix boot error Guo Dong
2021-01-07 11:56 ` Laszlo Ersek
2021-01-07 22:25   ` James Bottomley
2021-01-09  2:30     ` Ni, Ray
2021-01-07 15:01 ` Lendacky, Thomas
2021-01-07 16:14   ` Guo Dong
2021-01-07 17:32     ` Laszlo Ersek
2021-01-07 18:22 ` Michael D Kinney

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