From: Andrew Cooper <andrew.cooper3@citrix.com>
To: Boris Ostrovsky <boris.ostrovsky@oracle.com>,
<david.vrabel@citrix.com>, <JGross@suse.com>
Cc: Matt Fleming <matt@codeblueprint.co.uk>,
<xen-devel@lists.xenproject.org>, <linux-kernel@vger.kernel.org>,
<roger.pau@citrix.com>
Subject: Re: [Xen-devel] [PATCH 4/8] xen/pvh: Bootstrap PVH guest
Date: Fri, 14 Oct 2016 20:12:03 +0100 [thread overview]
Message-ID: <f8199e1a-0bef-61ff-8cad-e1713c9f10a3@citrix.com> (raw)
In-Reply-To: <87039f16-ab7d-d091-a28a-2e2a1a5b81fe@oracle.com>
On 14/10/16 19:55, Boris Ostrovsky wrote:
> On 10/14/2016 02:38 PM, Andrew Cooper wrote:
>>> + jmp *%rax
>>> +
>>> +#else /* CONFIG_X86_64 */
>>> +
>>> + call setup_pgtable_32
>>> +
>>> + mov $_pa(initial_page_table), %eax
>>> + movl %eax, %cr3
>>> +
>>> + movl %cr0, %eax
>>> + orl $(X86_CR0_PG | X86_CR0_PE), %eax
>>> + movl %eax, %cr0
>>> +
>>> + ljmp $__BOOT_CS,$1f
>>> +1:
>>> + call xen_prepare_pvh
>> Why does xen_prepare_pvh need paging? I can't spot anything which
>> should need it, and it feels conceptually wrong.
> xen_prepare_pvh() deals with virtual addresses. How can we run without paging?
Ah yes - with a high-half kernel, that way around doesn't work. Sorry
for the noise - I have been spending too long working with virtual
addresses down round 0, where that specifically can be solved by setting
%ds with a suitable non-zero base.
~Andrew
next prev parent reply other threads:[~2016-10-14 19:13 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-14 18:05 [PATCH 0/8] PVH v2 support Boris Ostrovsky
2016-10-14 18:05 ` [PATCH 1/8] xen/x86: Remove PVH support Boris Ostrovsky
2016-10-14 18:31 ` [Xen-devel] " Konrad Rzeszutek Wilk
2016-10-18 13:46 ` Juergen Gross
2016-10-18 14:45 ` Boris Ostrovsky
2016-10-18 15:33 ` Juergen Gross
2016-10-18 15:42 ` Boris Ostrovsky
2016-10-14 18:05 ` [PATCH 2/8] x86/head: Refactor 32-bit pgtable setup Boris Ostrovsky
2016-10-14 18:31 ` hpa
2016-10-14 18:44 ` Boris Ostrovsky
2016-10-14 19:04 ` hpa
2016-10-14 19:18 ` Boris Ostrovsky
2016-10-31 12:33 ` Boris Ostrovsky
2016-12-01 15:33 ` Boris Ostrovsky
2016-12-02 9:45 ` Ingo Molnar
2016-12-02 14:04 ` Boris Ostrovsky
2016-12-02 16:08 ` Ingo Molnar
2016-12-02 17:52 ` hpa
2016-12-02 19:49 ` Boris Ostrovsky
2016-12-03 5:49 ` Ingo Molnar
2016-12-03 6:36 ` hpa
2016-10-14 18:05 ` [PATCH 3/8] xen/pvh: Import PVH-related Xen public interfaces Boris Ostrovsky
2016-10-14 18:34 ` [Xen-devel] " Konrad Rzeszutek Wilk
2016-10-21 10:58 ` Juergen Gross
2016-10-14 18:05 ` [PATCH 4/8] xen/pvh: Bootstrap PVH guest Boris Ostrovsky
2016-10-14 18:38 ` [Xen-devel] " Andrew Cooper
2016-10-14 18:55 ` Boris Ostrovsky
2016-10-14 19:12 ` Andrew Cooper [this message]
2016-10-14 19:14 ` Konrad Rzeszutek Wilk
2016-10-14 19:34 ` Boris Ostrovsky
2016-10-14 18:05 ` [PATCH 5/8] xen/pvh: Prevent PVH guests from using PIC, RTC and IOAPIC Boris Ostrovsky
2016-10-14 19:16 ` [Xen-devel] " Konrad Rzeszutek Wilk
2016-10-14 19:37 ` Boris Ostrovsky
2016-10-26 10:42 ` Roger Pau Monné
2016-10-26 14:50 ` Boris Ostrovsky
2016-10-26 15:18 ` Roger Pau Monné
2016-10-26 16:06 ` Boris Ostrovsky
2016-10-14 18:05 ` [PATCH 6/8] xen/pvh: Initialize grant table for PVH guests Boris Ostrovsky
2016-10-14 19:19 ` [Xen-devel] " Konrad Rzeszutek Wilk
2016-10-14 19:43 ` Boris Ostrovsky
2016-10-14 19:51 ` Konrad Rzeszutek Wilk
2016-10-14 20:02 ` Boris Ostrovsky
2016-10-18 16:08 ` Juergen Gross
2016-10-18 16:40 ` Boris Ostrovsky
2016-10-19 5:47 ` Juergen Gross
2016-10-14 18:05 ` [PATCH 7/8] xen/pvh: PVH guests always have PV devices Boris Ostrovsky
2016-10-14 19:17 ` [Xen-devel] " Konrad Rzeszutek Wilk
2016-10-18 15:54 ` Juergen Gross
2016-10-14 18:05 ` [PATCH 8/8] xen/pvh: Enable CPU hotplug Boris Ostrovsky
2016-10-14 18:41 ` [Xen-devel] " Andrew Cooper
2016-10-14 19:01 ` Boris Ostrovsky
2016-10-27 14:25 ` Boris Ostrovsky
2016-10-27 15:00 ` Andrew Cooper
2016-10-27 16:23 ` Boris Ostrovsky
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