From: Michael Ellerman <mpe@ellerman•id.au>
To: David Gibson <david@gibson•dropbear.id.au>,
Vaibhav Jain <vaibhav@linux•ibm.com>
Cc: Oliver O'Halloran <oohall@gmail•com>,
Laurent Dufour <ldufour@linux•vnet.ibm.com>,
linuxppc-dev@lists•ozlabs.org,
"Aneesh Kumar K . V" <aneesh.kumar@linux•ibm.com>
Subject: Re: [PATCH v5 2/4] powerpc/pseries: Update SCM hcall op-codes in hvcall.h
Date: Tue, 30 Jul 2019 21:26:01 +1000 [thread overview]
Message-ID: <87ef27zrue.fsf@concordia.ellerman.id.au> (raw)
In-Reply-To: <20190726085300.GA4865@umbus>
David Gibson <david@gibson•dropbear.id.au> writes:
> On Tue, Jul 23, 2019 at 09:43:55PM +0530, Vaibhav Jain wrote:
>> Update the hvcalls.h to include op-codes for new hcalls introduce to
>> manage SCM memory. Also update existing hcall definitions to reflect
>> current papr specification for SCM.
>>
>> The removed hcall op-codes H_SCM_MEM_QUERY, H_SCM_BLOCK_CLEAR were
>> transient proposals and there support was never implemented by
>> Power-VM nor they were used anywhere in Linux kernel. Hence we don't
>> expect anyone to be impacted by this change.
>>
>> Signed-off-by: Vaibhav Jain <vaibhav@linux•ibm.com>
>
> They really should not have been merged while only interim proposals.
> But since they have changed, better to update them than not, obviously.
Yes, absolutely agree. It wasn't clear when I merged them that they were
*unpublished* and *unstable*.
Unfortunately we can't realistically wait for these APIs to be in a
published PAPR spec because it seems to take about 5 years for a PAPR
spec to escape the IBM firewall.
cheers
next prev parent reply other threads:[~2019-07-30 11:27 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-23 16:13 [PATCH v5 0/4] powerpc/papr_scm: Workaround for failure of drc bind after kexec Vaibhav Jain
2019-07-23 16:13 ` [DOC][PATCH v5 1/4] powerpc: Document some HCalls for Storage Class Memory Vaibhav Jain
2019-07-24 9:08 ` Laurent Dufour
2019-07-24 12:59 ` Michal Suchánek
2019-07-30 5:28 ` Vaibhav Jain
2019-07-30 12:06 ` Michael Ellerman
2019-07-23 16:13 ` [PATCH v5 2/4] powerpc/pseries: Update SCM hcall op-codes in hvcall.h Vaibhav Jain
2019-07-26 8:53 ` David Gibson
2019-07-30 11:26 ` Michael Ellerman [this message]
2019-07-23 16:13 ` [PATCH v5 3/4] powerpc/papr_scm: Update drc_pmem_unbind() to use H_SCM_UNBIND_ALL Vaibhav Jain
2019-07-23 16:13 ` [PATCH v5 4/4] powerpc/papr_scm: Force a scm-unbind if initial scm-bind fails Vaibhav Jain
2019-07-24 9:17 ` Laurent Dufour
2019-07-24 9:24 ` Oliver O'Halloran
2019-07-24 9:27 ` Laurent Dufour
2019-07-24 9:45 ` Oliver O'Halloran
2019-07-24 10:04 ` [PATCH v5 0/4] powerpc/papr_scm: Workaround for failure of drc bind after kexec Aneesh Kumar K.V
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