From: Scott Wood <scottwood@freescale.com>
To: Alexander Graf <agraf@suse.de>
Cc: Bhushan Bharat-R65777 <R65777@freescale.com>,
"kvm-ppc@vger.kernel.org" <kvm-ppc@vger.kernel.org>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>
Subject: Re: [PATCH 8/8] KVM:PPC:booke: Allow debug interrupt injection to guest
Date: Thu, 31 Jan 2013 18:43:15 +0000 [thread overview]
Message-ID: <1359657795.31540.5@snotra> (raw)
In-Reply-To: <FC301BB5-4DE3-48C1-A429-B4258C667A30@suse.de> (from agraf@suse.de on Thu Jan 31 12:21:07 2013)
On 01/31/2013 12:21:07 PM, Alexander Graf wrote:
> How about something like this? Then both targets at least suck as
> much :).
I'm not sure that should be the goal...
> Thanks to e500mc's awful hardware design, we don't know who sets the
> MSR_DE bit. Once we forced it onto the guest, we have no change to
> know whether the guest also set it or not. We could only guess.
MSRP[DEP] can prevent the guest from modifying MSR[DE] -- but we still
need to set it in the first place.
According to ISA V2.06B, the hypervisor should set DBCR0[EDM] to let
the guest know that the debug resources are not available, and that
"the value of MSR[DE] is not specified and not modifiable".
-Scott
WARNING: multiple messages have this Message-ID (diff)
From: Scott Wood <scottwood@freescale.com>
To: Alexander Graf <agraf@suse.de>
Cc: Bhushan Bharat-R65777 <R65777@freescale.com>,
"kvm-ppc@vger.kernel.org" <kvm-ppc@vger.kernel.org>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>
Subject: Re: [PATCH 8/8] KVM:PPC:booke: Allow debug interrupt injection to guest
Date: Thu, 31 Jan 2013 12:43:15 -0600 [thread overview]
Message-ID: <1359657795.31540.5@snotra> (raw)
In-Reply-To: <FC301BB5-4DE3-48C1-A429-B4258C667A30@suse.de> (from agraf@suse.de on Thu Jan 31 12:21:07 2013)
On 01/31/2013 12:21:07 PM, Alexander Graf wrote:
> How about something like this? Then both targets at least suck as
> much :).
I'm not sure that should be the goal...
> Thanks to e500mc's awful hardware design, we don't know who sets the
> MSR_DE bit. Once we forced it onto the guest, we have no change to
> know whether the guest also set it or not. We could only guess.
MSRP[DEP] can prevent the guest from modifying MSR[DE] -- but we still
need to set it in the first place.
According to ISA V2.06B, the hypervisor should set DBCR0[EDM] to let
the guest know that the debug resources are not available, and that
"the value of MSR[DE] is not specified and not modifiable".
-Scott
next prev parent reply other threads:[~2013-01-31 18:43 UTC|newest]
Thread overview: 109+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-16 8:24 [PATCH 2/8] KVM: PPC: booke: Allow multiple exception types Bharat Bhushan
2013-01-16 8:36 ` Bharat Bhushan
2013-01-16 8:24 ` [PATCH 3/8] KVM: PPC: booke: Added debug handler Bharat Bhushan
2013-01-16 8:36 ` Bharat Bhushan
2013-01-25 11:42 ` Alexander Graf
2013-01-25 11:42 ` Alexander Graf
2013-01-30 11:30 ` Bhushan Bharat-R65777
2013-01-31 12:17 ` Alexander Graf
2013-01-31 12:17 ` Alexander Graf
2013-01-31 16:58 ` Bhushan Bharat-R65777
2013-01-31 17:08 ` Alexander Graf
2013-01-31 17:08 ` Alexander Graf
2013-01-31 17:11 ` Alexander Graf
2013-01-31 17:11 ` Alexander Graf
2013-02-01 5:04 ` Bhushan Bharat-R65777
2013-02-01 5:04 ` Bhushan Bharat-R65777
2013-02-01 8:06 ` Alexander Graf
2013-02-01 8:06 ` Alexander Graf
2013-02-01 9:07 ` Bhushan Bharat-R65777
2013-02-01 9:07 ` Bhushan Bharat-R65777
2013-02-07 14:21 ` Alexander Graf
2013-02-07 14:21 ` Alexander Graf
2013-02-07 14:48 ` Bhushan Bharat-R65777
2013-02-07 14:48 ` Bhushan Bharat-R65777
2013-02-07 15:01 ` Alexander Graf
2013-02-07 15:01 ` Alexander Graf
2013-01-16 8:24 ` [PATCH 4/8] Added ONE_REG interface for debug instruction Bharat Bhushan
2013-01-16 8:36 ` Bharat Bhushan
2013-01-25 11:48 ` Alexander Graf
2013-01-25 11:48 ` Alexander Graf
2013-01-31 17:44 ` Bhushan Bharat-R65777
2013-01-31 17:52 ` Alexander Graf
2013-01-31 17:52 ` Alexander Graf
2013-01-31 17:58 ` Bhushan Bharat-R65777
2013-01-31 18:22 ` Alexander Graf
2013-01-31 18:22 ` Alexander Graf
2013-02-04 0:41 ` Paul Mackerras
2013-02-04 0:41 ` Paul Mackerras
2013-02-07 14:29 ` Alexander Graf
2013-02-07 14:29 ` Alexander Graf
2013-02-11 0:22 ` Paul Mackerras
2013-02-11 0:22 ` Paul Mackerras
2013-01-16 8:24 ` [PATCH 5/8] KVM: PPC: debug stub interface parameter defined Bharat Bhushan
2013-01-16 8:36 ` Bharat Bhushan
2013-01-17 7:22 ` Paul Mackerras
2013-01-17 7:22 ` Paul Mackerras
2013-01-17 11:11 ` Bhushan Bharat-R65777
2013-01-25 11:53 ` Alexander Graf
2013-01-25 11:53 ` Alexander Graf
2013-01-30 14:15 ` Bhushan Bharat-R65777
2013-01-31 13:01 ` Alexander Graf
2013-01-31 13:01 ` Alexander Graf
2013-01-31 14:05 ` Bhushan Bharat-R65777
2013-01-31 14:27 ` Alexander Graf
2013-01-31 14:27 ` Alexander Graf
2013-01-31 14:44 ` Bhushan Bharat-R65777
2013-01-16 8:24 ` [PATCH 6/8] booke: Added DBCR4 SPR number Bharat Bhushan
2013-01-16 8:36 ` Bharat Bhushan
2013-01-16 8:24 ` [PATCH 7/8] KVM: PPC: booke/bookehv: Add debug stub support Bharat Bhushan
2013-01-16 8:36 ` Bharat Bhushan
2013-01-25 12:07 ` Alexander Graf
2013-01-25 12:07 ` Alexander Graf
2013-02-01 6:31 ` Bhushan Bharat-R65777
2013-02-01 6:31 ` Bhushan Bharat-R65777
2013-02-01 8:21 ` Alexander Graf
2013-02-01 8:21 ` Alexander Graf
2013-01-16 8:24 ` [PATCH 8/8] KVM:PPC:booke: Allow debug interrupt injection to guest Bharat Bhushan
2013-01-16 8:36 ` Bharat Bhushan
2013-01-25 12:13 ` Alexander Graf
2013-01-25 12:13 ` Alexander Graf
2013-01-30 11:12 ` Bhushan Bharat-R65777
2013-01-30 11:12 ` Bhushan Bharat-R65777
2013-01-31 12:04 ` Alexander Graf
2013-01-31 12:04 ` Alexander Graf
2013-01-31 17:59 ` Bhushan Bharat-R65777
2013-01-31 18:21 ` Alexander Graf
2013-01-31 18:21 ` Alexander Graf
2013-01-31 18:43 ` Scott Wood [this message]
2013-01-31 18:43 ` Scott Wood
2013-01-31 18:52 ` Alexander Graf
2013-01-31 18:52 ` Alexander Graf
2013-01-31 18:54 ` Scott Wood
2013-01-31 18:54 ` Scott Wood
2013-01-31 19:05 ` Alexander Graf
2013-01-31 19:05 ` Alexander Graf
2013-01-31 19:20 ` Alexander Graf
2013-01-31 19:20 ` Alexander Graf
2013-01-31 22:40 ` Scott Wood
2013-01-31 22:40 ` Scott Wood
2013-02-01 0:11 ` Alexander Graf
2013-02-01 0:11 ` Alexander Graf
2013-02-01 22:38 ` Scott Wood
2013-02-01 22:38 ` Scott Wood
2013-02-04 4:48 ` Bhushan Bharat-R65777
2013-02-04 4:48 ` Bhushan Bharat-R65777
2013-02-04 19:47 ` Scott Wood
2013-02-04 19:47 ` Scott Wood
2013-02-07 14:58 ` Alexander Graf
2013-02-07 14:58 ` Alexander Graf
2013-02-07 15:25 ` Bhushan Bharat-R65777
2013-02-07 15:25 ` Bhushan Bharat-R65777
2013-02-07 15:53 ` Alexander Graf
2013-02-07 15:53 ` Alexander Graf
2013-02-07 15:00 ` Bhushan Bharat-R65777
2013-02-07 15:00 ` Bhushan Bharat-R65777
2013-02-07 15:08 ` Alexander Graf
2013-02-07 15:08 ` Alexander Graf
2013-01-31 18:03 ` Scott Wood
2013-01-31 18:03 ` Scott Wood
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