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From: Corneliu ZUZU <czuzu@bitdefender.com>
To: Tamas K Lengyel <tamas@tklengyel.com>
Cc: Kevin Tian <kevin.tian@intel.com>,
	Jan Beulich <jbeulich@suse.com>,
	Razvan Cojocaru <rcojocaru@bitdefender.com>,
	Andrew Cooper <andrew.cooper3@citrix.com>,
	Xen-devel <xen-devel@lists.xen.org>,
	Jun Nakajima <jun.nakajima@intel.com>
Subject: Re: [PATCH 4/7] vm-event/x86: use vm_event_vcpu_enter properly
Date: Fri, 17 Jun 2016 12:24:38 +0300	[thread overview]
Message-ID: <4e5a3117-3321-e2ea-89fe-d42632c68aa1@bitdefender.com> (raw)
In-Reply-To: <CABfawhn7b5+g4WyeD+Dr=UnP0mj2fTiRoCYzAO03bxf3imho+A@mail.gmail.com>

On 6/16/2016 7:27 PM, Tamas K Lengyel wrote:
>> diff --git a/xen/arch/x86/monitor.c b/xen/arch/x86/monitor.c
>> index 1fec412..1e5445f 100644
>> --- a/xen/arch/x86/monitor.c
>> +++ b/xen/arch/x86/monitor.c
>> @@ -20,7 +20,6 @@
>>    */
>>
>>   #include <asm/monitor.h>
>> -#include <public/vm_event.h>
>>
>>   int arch_monitor_domctl_event(struct domain *d,
>>                                 struct xen_domctl_monitor_op *mop)
>> @@ -62,14 +61,6 @@ int arch_monitor_domctl_event(struct domain *d,
>>           else
>>               ad->monitor.write_ctrlreg_enabled &= ~ctrlreg_bitmask;
>>
>> -        if ( VM_EVENT_X86_CR3 == mop->u.mov_to_cr.index )
>> -        {
>> -            struct vcpu *v;
>> -            /* Latches new CR3 mask through CR0 code. */
>> -            for_each_vcpu ( d, v )
>> -                hvm_update_guest_cr(v, 0);
>> -        }
>> -
> So this block is not really getting relocated as the commit message
> suggests as much as being completely reworked at a different location?
> It would be better for it to be it's own separate patch as the changes
> are not trivial.

That's actually not reworked, it's completely removed since there's no 
need for it anymore.
That is: "latching of CR3 mask" is not done "through CR0" anymore but 
rather through the vm_event_vcpu_enter function instead and you don't 
have to do anything more here in arch_monitor_domctl_event for that to 
happen.

>>           domain_unpause(d);
>>
>>           break;
> Thanks,
> Tamas
>



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  reply	other threads:[~2016-06-17  9:24 UTC|newest]

Thread overview: 73+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-06-16 14:04 [PATCH 0/7] vm-event: Implement ARM support for control-register writes Corneliu ZUZU
2016-06-16 14:06 ` [PATCH 1/7] minor (formatting) fixes Corneliu ZUZU
2016-06-16 14:24   ` Jan Beulich
2016-06-16 19:19     ` Corneliu ZUZU
2016-06-17  7:06       ` Jan Beulich
2016-06-17 10:46         ` Corneliu ZUZU
2016-06-16 16:02   ` Tamas K Lengyel
2016-06-17  8:33     ` Corneliu ZUZU
2016-06-17  8:36       ` Razvan Cojocaru
2016-06-17  9:29         ` Andrew Cooper
2016-06-17  9:35           ` Jan Beulich
2016-06-17  9:33         ` Jan Beulich
2016-06-17  9:36           ` Razvan Cojocaru
2016-06-17  9:40             ` Jan Beulich
2016-06-17  9:42               ` Razvan Cojocaru
2016-06-17 19:05           ` Tamas K Lengyel
2016-06-16 14:07 ` [PATCH 2/7] vm-event: VM_EVENT_FLAG_DENY requires VM_EVENT_FLAG_VCPU_PAUSED Corneliu ZUZU
2016-06-16 16:11   ` Tamas K Lengyel
2016-06-17  8:43     ` Corneliu ZUZU
2016-06-21 11:26     ` Corneliu ZUZU
2016-06-21 15:09       ` Tamas K Lengyel
2016-06-22  8:34         ` Corneliu ZUZU
2016-06-16 14:08 ` [PATCH 3/7] vm-event: introduce vm_event_vcpu_enter Corneliu ZUZU
2016-06-16 14:51   ` Jan Beulich
2016-06-16 20:10     ` Corneliu ZUZU
2016-06-16 20:33       ` Razvan Cojocaru
2016-06-17 10:41         ` Corneliu ZUZU
2016-06-17  7:17       ` Jan Beulich
2016-06-17 11:13         ` Corneliu ZUZU
2016-06-17 11:27           ` Jan Beulich
2016-06-17 12:13             ` Corneliu ZUZU
2016-06-16 16:17   ` Tamas K Lengyel
2016-06-17  9:19     ` Corneliu ZUZU
2016-06-17  8:55   ` Julien Grall
2016-06-17 11:40     ` Corneliu ZUZU
2016-06-17 13:22       ` Julien Grall
2016-06-16 14:09 ` [PATCH 4/7] vm-event/x86: use vm_event_vcpu_enter properly Corneliu ZUZU
2016-06-16 15:00   ` Jan Beulich
2016-06-16 20:20     ` Corneliu ZUZU
2016-06-17  7:20       ` Jan Beulich
2016-06-17 11:23         ` Corneliu ZUZU
2016-06-16 16:27   ` Tamas K Lengyel
2016-06-17  9:24     ` Corneliu ZUZU [this message]
2016-06-16 14:10 ` [PATCH 5/7] x86: replace monitor_write_data.do_write with enum Corneliu ZUZU
2016-06-16 14:12 ` [PATCH 6/7] vm-event/arm: move hvm_event_cr->common vm_event_monitor_cr Corneliu ZUZU
2016-06-16 15:16   ` Jan Beulich
2016-06-17  8:25     ` Corneliu ZUZU
2016-06-17  8:38       ` Jan Beulich
2016-06-17 11:31         ` Corneliu ZUZU
2016-06-21  7:08       ` Corneliu ZUZU
2016-06-21  7:20         ` Jan Beulich
2016-06-21 15:22           ` Tamas K Lengyel
2016-06-22  6:33             ` Jan Beulich
2016-06-16 16:55   ` Tamas K Lengyel
2016-06-17 10:37     ` Corneliu ZUZU
2016-06-16 14:13 ` [PATCH 7/7] vm-event/arm: implement support for control-register write vm-events Corneliu ZUZU
2016-06-16 14:26   ` Julien Grall
2016-06-16 19:24     ` Corneliu ZUZU
2016-06-16 21:28       ` Julien Grall
2016-06-17 11:46         ` Corneliu ZUZU
2016-06-16 16:49   ` Julien Grall
2016-06-17 10:36     ` Corneliu ZUZU
2016-06-17 13:18       ` Julien Grall
2016-06-22 16:35       ` Corneliu ZUZU
2016-06-22 17:17         ` Julien Grall
2016-06-22 18:39           ` Corneliu ZUZU
2016-06-22 19:37             ` Corneliu ZUZU
2016-06-22 19:41               ` Julien Grall
2016-06-23  5:31                 ` Corneliu ZUZU
2016-06-23  5:49                   ` Corneliu ZUZU
2016-06-23 11:11                     ` Julien Grall
2016-06-24  9:32                       ` Corneliu ZUZU
2016-06-23 11:00           ` Julien Grall

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