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Re: [Xen-devel] [PATCH] [HVM] enable MTF for guest single step debug
| To: | "Zhai, Edwin" <edwin.zhai@xxxxxxxxx>, Xen Developers <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] [PATCH] [HVM] enable MTF for guest single step debug |
| From: | Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
| Date: | Thu, 11 Dec 2008 11:45:12 +0000 |
| Cc: | |
| Delivery-date: | Thu, 11 Dec 2008 03:46:04 -0800 |
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| Thread-topic: | [Xen-devel] [PATCH] [HVM] enable MTF for guest single step debug |
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On 11/12/2008 07:09, "Zhai, Edwin" <edwin.zhai@xxxxxxxxx> wrote: > Monitor Trap Flag (MTF), is a debugging feature that cause vmexit on > certain instruction boundaries, which can be used for HVM single step. > We prefer MTF over TF, as it make TF free for guest use. > > This patch try to enable MTF for single step in gdb, and keep backward > compatibility on old processor. > > Pls. see MTF details @ SDM 3b 21.7.2 Don't need EVENTTYPE_OTHER. Don't need to modify svm.c at all. The hvm_param is gross since there is no obvious symmetric get() to go with your set() -- please just hack in a domctl, that'd be neater in this case imo even though specific right now to x86 hvm. That'll do for comments on patch v1... :-) -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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