From: Chen Gang <gang.chen@asianux.com>
To: Michael Neuling <mikey@neuling.org>
Cc: sfr@canb.auug.org.au, matt@ozlabs.org,
linux-kernel@vger.kernel.org, Paul Mackerras <paulus@samba.org>,
"Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>,
Mike Qiu <qiudayu@linux.vnet.ibm.com>,
linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH v2] PowerPC: kernel: compiling issue, make additional room in exception vector area
Date: Fri, 26 Apr 2013 09:06:10 +0800 [thread overview]
Message-ID: <5179D302.9060203@asianux.com> (raw)
In-Reply-To: <30269.1366931768@ale.ozlabs.ibm.com>
On 2013年04月26日 07:16, Michael Neuling wrote:
>> > diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S
>> > index e789ee7..8997de2 100644
>> > --- a/arch/powerpc/kernel/exceptions-64s.S
>> > +++ b/arch/powerpc/kernel/exceptions-64s.S
>> > @@ -254,7 +254,11 @@ hardware_interrupt_hv:
>> > STD_EXCEPTION_PSERIES(0x800, 0x800, fp_unavailable)
>> > KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0x800)
>> >
>> > - MASKABLE_EXCEPTION_PSERIES(0x900, 0x900, decrementer)
>> > + . = 0x900
>> > + .globl decrementer_pSeries
>> > +decrementer_pSeries:
>> > + b decrementer_pSeries_0
>> > +
> Unfortunately you can't do this ether as we need to save the CFAR[1]
> before it's overwritten by any branch. MASKABLE_EXCEPTION_PSERIES does
> this.
>
Thanks for your checking.
> CFAR is the Come From Register. It saves the location of the last
> branch and is hence overwritten by any branch.
>
Do we process it just like others done (e.g. 0x300, 0xe00, 0xe20 ...) ?
. = 0x900
.globl decrementer_pSeries
decrementer_pSeries:
HMT_MEDIUM_PPR_DISCARD
SET_SCRATCH0(r13)
b decrementer_pSeries_0
...
> Thanks for trying.
>
Not at all, before get fixed by other members, I should continue trying.
--
Chen Gang
Asianux Corporation
WARNING: multiple messages have this Message-ID (diff)
From: Chen Gang <gang.chen@asianux.com>
To: Michael Neuling <mikey@neuling.org>
Cc: Mike Qiu <qiudayu@linux.vnet.ibm.com>,
Paul Mackerras <paulus@samba.org>,
Michael Ellerman <michael@ellerman.id.au>,
linuxppc-dev@lists.ozlabs.org, sfr@canb.auug.org.au,
matt@ozlabs.org, linux-kernel@vger.kernel.org,
"Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Subject: Re: [PATCH v2] PowerPC: kernel: compiling issue, make additional room in exception vector area
Date: Fri, 26 Apr 2013 09:06:10 +0800 [thread overview]
Message-ID: <5179D302.9060203@asianux.com> (raw)
In-Reply-To: <30269.1366931768@ale.ozlabs.ibm.com>
On 2013年04月26日 07:16, Michael Neuling wrote:
>> > diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S
>> > index e789ee7..8997de2 100644
>> > --- a/arch/powerpc/kernel/exceptions-64s.S
>> > +++ b/arch/powerpc/kernel/exceptions-64s.S
>> > @@ -254,7 +254,11 @@ hardware_interrupt_hv:
>> > STD_EXCEPTION_PSERIES(0x800, 0x800, fp_unavailable)
>> > KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0x800)
>> >
>> > - MASKABLE_EXCEPTION_PSERIES(0x900, 0x900, decrementer)
>> > + . = 0x900
>> > + .globl decrementer_pSeries
>> > +decrementer_pSeries:
>> > + b decrementer_pSeries_0
>> > +
> Unfortunately you can't do this ether as we need to save the CFAR[1]
> before it's overwritten by any branch. MASKABLE_EXCEPTION_PSERIES does
> this.
>
Thanks for your checking.
> CFAR is the Come From Register. It saves the location of the last
> branch and is hence overwritten by any branch.
>
Do we process it just like others done (e.g. 0x300, 0xe00, 0xe20 ...) ?
. = 0x900
.globl decrementer_pSeries
decrementer_pSeries:
HMT_MEDIUM_PPR_DISCARD
SET_SCRATCH0(r13)
b decrementer_pSeries_0
...
> Thanks for trying.
>
Not at all, before get fixed by other members, I should continue trying.
--
Chen Gang
Asianux Corporation
next prev parent reply other threads:[~2013-04-26 1:07 UTC|newest]
Thread overview: 72+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-24 8:22 "attempt to move .org backwards" still show up Mike Qiu
2013-04-24 8:22 ` Mike Qiu
2013-04-24 8:31 ` Michael Ellerman
2013-04-24 8:31 ` Michael Ellerman
2013-04-24 8:35 ` Mike Qiu
2013-04-24 8:35 ` Mike Qiu
2013-04-24 10:37 ` Michael Neuling
2013-04-24 10:37 ` Michael Neuling
2013-04-24 12:47 ` Mike
2013-04-24 12:47 ` Mike
2013-04-25 1:05 ` Chen Gang
2013-04-25 1:05 ` Chen Gang
2013-04-25 4:05 ` Mike Qiu
2013-04-25 4:05 ` Mike Qiu
2013-04-25 5:36 ` Chen Gang
2013-04-25 5:36 ` Chen Gang
2013-04-25 7:23 ` Chen Gang
2013-04-25 7:23 ` Chen Gang
2013-04-25 6:25 ` Paul Mackerras
2013-04-25 6:25 ` Paul Mackerras
2013-04-25 11:16 ` Chen Gang
2013-04-25 11:16 ` Chen Gang
2013-04-26 1:58 ` Mike Qiu
2013-04-26 1:58 ` Mike Qiu
2013-04-26 2:05 ` Chen Gang
2013-04-26 2:05 ` Chen Gang
2013-04-25 11:51 ` [PATCH v2] PowerPC: kernel: compiling issue, make additional room in exception vector area Chen Gang
2013-04-25 11:51 ` Chen Gang
2013-04-25 11:58 ` Chen Gang
2013-04-25 11:58 ` Chen Gang
2013-04-25 23:16 ` Michael Neuling
2013-04-25 23:16 ` Michael Neuling
2013-04-26 1:06 ` Chen Gang [this message]
2013-04-26 1:06 ` Chen Gang
2013-04-26 1:18 ` Chen Gang
2013-04-26 1:18 ` Chen Gang
2013-04-26 1:36 ` Chen Gang
2013-04-26 1:36 ` Chen Gang
2013-04-26 2:03 ` Mike Qiu
2013-04-26 2:03 ` Mike Qiu
2013-04-26 2:06 ` Chen Gang
2013-04-26 2:06 ` Chen Gang
2013-04-26 3:08 ` Mike Qiu
2013-04-26 3:08 ` Mike Qiu
2013-04-26 3:25 ` Chen Gang
2013-04-26 3:25 ` Chen Gang
2013-04-26 3:42 ` Chen Gang
2013-04-26 3:42 ` Chen Gang
2013-04-26 3:54 ` Mike Qiu
2013-04-26 3:54 ` Mike Qiu
2013-04-27 9:28 ` Chen Gang F T
2013-04-27 9:28 ` Chen Gang F T
2013-04-27 9:32 ` Mike Qiu
2013-04-27 9:32 ` Mike Qiu
2013-04-27 9:33 ` Chen Gang
2013-04-27 9:33 ` Chen Gang
2013-04-26 3:19 ` "attempt to move .org backwards" still show up Mike Qiu
2013-04-26 3:19 ` Mike Qiu
2013-04-25 8:18 ` [PATCH] PowerPC: kernel: compiling issue, make additional room in exception vector area Chen Gang
2013-04-25 8:18 ` Chen Gang
2013-04-25 8:21 ` Chen Gang
2013-04-25 8:21 ` Chen Gang
2013-04-25 8:24 ` Mike Qiu
2013-04-25 8:24 ` Mike Qiu
2013-04-25 9:00 ` Michael Neuling
2013-04-25 9:00 ` Michael Neuling
2013-04-25 9:05 ` Chen Gang
2013-04-25 9:05 ` Chen Gang
2013-04-25 9:30 ` Chen Gang
2013-04-25 9:30 ` Chen Gang
2013-04-24 8:36 ` "attempt to move .org backwards" still show up Mike Qiu
2013-04-24 8:36 ` Mike Qiu
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