From: George Dunlap <george.dunlap@eu.citrix.com>
To: Jan Beulich <JBeulich@suse.com>
Cc: Tim Deegan <tim@xen.org>, Keir Fraser <keir@xen.org>,
Jan Beulich <jan.beulich@suse.com>,
xen-devel@lists.xen.org
Subject: Re: [PATCH RFC v12 08/21] pvh: vmx-specific changes
Date: Mon, 16 Sep 2013 10:15:55 +0100 [thread overview]
Message-ID: <5236CC4B.9080703@eu.citrix.com> (raw)
In-Reply-To: <5236D14702000078000F3823@nat28.tlf.novell.com>
On 16/09/13 08:37, Jan Beulich wrote:
>>>> On 13.09.13 at 18:38, George Dunlap <george.dunlap@eu.citrix.com> wrote:
>> On 13/09/13 17:25, George Dunlap wrote:
>>> + /* PVH: Why is ET not set? */
>>> + v->arch.hvm_vcpu.guest_cr[0] = is_pvh_domain(d) ?
>>> + ( X86_CR0_PG | X86_CR0_NE | X86_CR0_PE | X86_CR0_WP )
>>> + : ( X86_CR0_PE | X86_CR0_ET );
>> I also couldn't figure out why CR0_ET wasn't set for PVH vms; is it not
>> set for PV vms?
> This one's certainly wrong - it shouldn't even be possible to clear
> CR0.ET in hardware on anything post-486 (i.e. trying to clear it
> would be silently ignored by the hardware, and not setting it in
> the code above is merely confusing, but not actively breaking
> anything).
Right -- so it would be better if this were something like:
v->arch.hvm_vcpu.guest_cr[0] = $SHARED_FLAGS;
if ( is_pvh_domain(d))
v->arch.hvm_vcpu.guest_cr[0] |= $PVH_FLAGS.
-George
next prev parent reply other threads:[~2013-09-16 9:15 UTC|newest]
Thread overview: 76+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-13 16:25 Introduce PVH domU support George Dunlap
2013-09-13 16:25 ` [PATCH RFC v12 01/21] Fix failure path in hvm_vcpu_initialise George Dunlap
2013-09-13 16:25 ` [PATCH RFC v12 02/21] Fix failure path in construct_vmcs George Dunlap
2013-09-13 16:25 ` [PATCH RFC v12 03/21] Remove an unnecessary assert from vmx_update_debug_state George Dunlap
2013-09-16 21:09 ` Mukesh Rathor
2013-09-18 10:39 ` George Dunlap
2013-09-18 12:38 ` Jan Beulich
2013-09-18 12:53 ` George Dunlap
2013-09-18 13:51 ` Jan Beulich
2013-09-13 16:25 ` [PATCH RFC v12 04/21] pvh prep: code motion George Dunlap
2013-09-18 12:59 ` Jan Beulich
2013-09-13 16:25 ` [PATCH RFC v12 05/21] Introduce pv guest type and has_hvm_container macros George Dunlap
2013-09-18 13:46 ` Jan Beulich
2013-09-19 16:27 ` George Dunlap
2013-09-20 8:11 ` Jan Beulich
2013-09-20 9:23 ` George Dunlap
2013-09-20 9:44 ` Jan Beulich
2013-09-19 16:58 ` George Dunlap
2013-09-20 8:38 ` Jan Beulich
2013-09-13 16:25 ` [PATCH RFC v12 06/21] pvh: Introduce PVH guest type George Dunlap
2013-09-18 14:10 ` Jan Beulich
2013-09-20 10:01 ` George Dunlap
2013-09-13 16:25 ` [PATCH RFC v12 07/21] pvh: Disable unneeded features of HVM containers George Dunlap
2013-09-13 16:36 ` George Dunlap
[not found] ` <CAGU+aus16muryVYd-aOzv-CAXPk_xxVh_e-R7Ug1RxGRJ_MAfQ@mail.gmail.com>
2013-09-13 21:33 ` Aravindh Puthiyaparambil (aravindp)
2013-09-16 23:17 ` Mukesh Rathor
2013-09-18 10:50 ` George Dunlap
2013-09-18 14:18 ` Jan Beulich
2013-09-18 14:43 ` George Dunlap
2013-09-18 14:47 ` Jan Beulich
2013-09-13 16:25 ` [PATCH RFC v12 08/21] pvh: vmx-specific changes George Dunlap
2013-09-13 16:38 ` George Dunlap
2013-09-16 7:37 ` Jan Beulich
2013-09-16 9:15 ` George Dunlap [this message]
2013-09-16 23:12 ` Mukesh Rathor
2013-09-17 8:48 ` George Dunlap
2013-09-18 0:13 ` Mukesh Rathor
2013-09-18 14:25 ` Jan Beulich
2013-09-20 13:07 ` George Dunlap
2013-09-13 16:25 ` [PATCH RFC v12 09/21] pvh: Do not allow PVH guests to change paging modes George Dunlap
2013-09-18 14:32 ` Jan Beulich
2013-09-13 16:25 ` [PATCH RFC v12 10/21] pvh: PVH access to hypercalls George Dunlap
2013-09-18 14:45 ` Jan Beulich
2013-09-13 16:25 ` [PATCH RFC v12 11/21] pvh: Use PV e820 George Dunlap
2013-09-18 14:48 ` Jan Beulich
2013-09-13 16:25 ` [PATCH RFC v12 12/21] pvh: Support guest_kernel_mode for PVH George Dunlap
2013-09-18 14:52 ` Jan Beulich
2013-09-13 16:25 ` [PATCH RFC v12 13/21] pvh: Support read_segment_register " George Dunlap
2013-09-18 14:56 ` Jan Beulich
2013-09-20 14:18 ` George Dunlap
2013-09-20 14:56 ` Jan Beulich
2013-09-13 16:25 ` [PATCH RFC v12 14/21] pvh: read_descriptor for PVH guests George Dunlap
2013-09-13 16:40 ` George Dunlap
2013-09-18 15:00 ` Jan Beulich
2013-09-13 16:25 ` [PATCH RFC v12 15/21] pvh: Set up more PV stuff in set_info_guest George Dunlap
2013-09-18 15:17 ` Jan Beulich
2013-09-20 14:50 ` George Dunlap
2013-09-20 14:58 ` Jan Beulich
2013-09-20 15:12 ` George Dunlap
2013-09-20 15:26 ` Jan Beulich
2013-09-13 16:25 ` [PATCH RFC v12 16/21] pvh: Use PV handlers for emulated forced invalid ops, cpuid, and IO George Dunlap
2013-09-18 15:31 ` Jan Beulich
2013-09-19 1:02 ` Mukesh Rathor
2013-09-19 10:09 ` Jan Beulich
2013-09-20 17:03 ` George Dunlap
2013-09-20 17:06 ` George Dunlap
2013-09-23 6:49 ` Jan Beulich
2013-09-23 13:48 ` George Dunlap
2013-09-23 14:09 ` Jan Beulich
2013-09-13 16:25 ` [PATCH RFC v12 17/21] pvh: Disable 32-bit guest support for now George Dunlap
2013-09-18 15:36 ` Jan Beulich
2013-09-13 16:25 ` [PATCH RFC v12 18/21] pvh: Restrict tsc_mode to NEVER_EMULATE " George Dunlap
2013-09-13 16:25 ` [PATCH RFC v12 19/21] pvh: Disable debug traps when doing pv emulation for PVH domains George Dunlap
2013-09-13 16:25 ` [PATCH RFC v12 20/21] pvh: Disable memevents for PVH guests for now George Dunlap
2013-09-13 16:25 ` [PATCH RFC v12 21/21] pvh: Documentation George Dunlap
2013-09-13 16:41 ` Introduce PVH domU support George Dunlap
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