From: Jan Kiszka <jan.kiszka@siemens.com>
To: Bandan Das <bsd@redhat.com>, kvm@vger.kernel.org
Subject: Re: APIC_ID in apic_reg_write()
Date: Wed, 29 Apr 2015 20:34:27 +0200 [thread overview]
Message-ID: <55412433.7080805@siemens.com> (raw)
In-Reply-To: <jpgfv7iubjp.fsf@redhat.com>
Am 2015-04-29 um 18:47 schrieb Bandan Das:
>
> Why do we allow writes to APIC_ID ? On all _newer_ processors, it's
> read only. The spec doesn't explicitly mention it though, or atleast
> I couldn't find it. Does userspace have a reason to modify it ?
The APIC ID is read-only for x2APIC. It remains R/W for xAPIC.
Jan
--
Siemens AG, Corporate Technology, CT RTC ITP SES-DE
Corporate Competence Center Embedded Linux
next prev parent reply other threads:[~2015-04-29 18:34 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-29 16:47 APIC_ID in apic_reg_write() Bandan Das
2015-04-29 18:34 ` Jan Kiszka [this message]
2015-04-29 18:54 ` Bandan Das
2015-04-29 19:07 ` Jan Kiszka
2015-04-29 22:21 ` Bandan Das
2015-04-30 5:40 ` Jan Kiszka
2015-04-30 16:50 ` Bandan Das
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