linux-kernel - Re: [PATCH] Documentation/kvm : Add documentation on Hypercalls

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <501A2775.90404@linux.vnet.ibm.com>
Date:	Thu, 02 Aug 2012 12:38:37 +0530
From:	Raghavendra K T <raghavendra.kt@...ux.vnet.ibm.com>
To:	Marcelo Tosatti <mtosatti@...hat.com>,
	Alexander Graf <agraf@...e.de>
CC:	Rob Landley <rob@...dley.net>, linux-kernel@...r.kernel.org,
	linux-doc@...r.kernel.org, Randy Dunlap <rdunlap@...otime.net>,
	KVM <kvm@...r.kernel.org>, "H. Peter Anvin" <hpa@...or.com>,
	Gleb Natapov <gleb@...hat.com>, Ingo Molnar <mingo@...hat.com>,
	Avi Kivity <avi@...hat.com>,
	Jan Kiszka <jan.kiszka@...mens.com>
Subject: Re: [PATCH] Documentation/kvm : Add documentation on Hypercalls

On 08/01/2012 11:55 PM, Marcelo Tosatti wrote:
> On Wed, Aug 01, 2012 at 04:19:01PM +0530, Raghavendra K T wrote:
>> On 08/01/2012 08:37 AM, Marcelo Tosatti wrote:
>>> On Tue, Jul 24, 2012 at 02:23:59PM +0530, Raghavendra K T wrote:
>>>> From: Raghavendra K T<raghavendra.kt@...ux.vnet.ibm.com>
>>>>
>>>> Thanks Alex for KVM_HC_FEATURES inputs and Jan for VAPIC_POLL_IRQ,
>>>> and Peter (HPA) for suggesting hypercall ABI addition.
>>>>
>>>> Signed-off-by: Raghavendra K T<raghavendra.kt@...ux.vnet.ibm.com>
>>>> ---
[...]
>>>> +
>>>> + Up to four arguments may be passed in rbx, rcx, rdx, and rsi respectively.
>>>> + The hypercall number should be placed in rax and the return value will be
>>>> + placed in rax.  No other registers will be clobbered unless explicitly stated
>>>> + by the particular hypercall.
>>>
>>> It depends on the hypercall. It happens that current hypercalls use
>>> the four registers, but its not an ABI (hyper-v hypercalls uses r8, for example).
>>>
>>
>> Okay, agree. I did not know about hyper-v. Above one is for X86 and
>> KVM  (and not X86 / hyper-v). So I should remove ABI and probably say,
>
> Just say "Linux x86 Hypercall", yeah.
>

Ok, Thanks Marcelo.will respin patches with the changes you suggested.

Also I would  like add Alex's description on ppc hypercalls
into Documentation/virtual/kvm/ppc-pv.txt with Alex from/sob or
suggested-by in a separate patch unless I see any objection to that.

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/