From: Anthony Liguori <aliguori-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
To: Carsten Otte <cotte-tA70FqPdS9bQT0dZR+AlfA@public.gmane.org>
Cc: "kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org"
<kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org>,
cborntra-tA70FqPdS9bQT0dZR+AlfA@public.gmane.org,
schwidefsky-tA70FqPdS9bQT0dZR+AlfA@public.gmane.org
Subject: Re: [PATCH/RFC 2/2] s390 virtualization interface.
Date: Fri, 27 Apr 2007 10:23:08 -0500 [thread overview]
Message-ID: <4632155C.8030503@us.ibm.com> (raw)
In-Reply-To: <1177681235.5770.22.camel-WIxn4w2hgUz3YA32ykw5MLlKpX0K8NHHQQ4Iyu8u01E@public.gmane.org>
Can you provide a high-level description of how this virtualization
mechanism works? How does MMU virtualization work?
Carsten Otte wrote:
> +
> +#ifndef _ASM_S390_SIE64_H
> +#define _ASM_S390_SIE64_H
> +
> +struct sie_block {
> + atomic_t cpuflags; /* 0x0000 */
> + __u32 prefix; /* 0x0004 */
> + __u32 :32; /* 0x0008 */
> + __u32 :32; /* 0x000c */
> + __u64 :64; /* 0x0010 */
> + __u64 :64; /* 0x0018 */
> + __u64 :64; /* 0x0020 */
> + __u64 cputm; /* 0x0028 */
> + __u64 ckc; /* 0x0030 */
> + __u64 epoch; /* 0x0038 */
> + __u8 svcnn :1, /* 0x0040 */
> + svc1c :1,
> + svc2c :1,
> + svc3c :1,
> + :4;
>
I think bitfields can have weird padding issues.
Regards,
Anthony Liguori
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next prev parent reply other threads:[~2007-04-27 15:23 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-27 13:40 [PATCH/RFC 2/2] s390 virtualization interface Carsten Otte
[not found] ` <1177681235.5770.22.camel-WIxn4w2hgUz3YA32ykw5MLlKpX0K8NHHQQ4Iyu8u01E@public.gmane.org>
2007-04-27 15:23 ` Anthony Liguori [this message]
[not found] ` <4632155C.8030503-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
2007-04-27 15:45 ` Carsten Otte
2007-04-27 16:53 ` Arnd Bergmann
[not found] ` <200704271853.41523.arnd-r2nGTMty4D4@public.gmane.org>
2007-04-29 8:00 ` Heiko Carstens
[not found] ` <20070429080039.GA8332-5VkHqLvV2o3MbYB6QlFGEg@public.gmane.org>
2007-05-01 21:12 ` Arnd Bergmann
[not found] ` <200705012312.11692.arnd-r2nGTMty4D4@public.gmane.org>
2007-05-02 4:46 ` Avi Kivity
2007-05-02 8:25 ` Christoph Hellwig
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