From: Paolo Bonzini <pbonzini@redhat.com>
To: Nadav Amit <cdp.ta.incharge@gmail.com>
Cc: kvm@vger.kernel.org
Subject: Re: Regression problem with commit 5045b46803
Date: Sun, 17 Aug 2014 08:28:16 +0200 [thread overview]
Message-ID: <53F04B80.9050704@redhat.com> (raw)
In-Reply-To: <4ACFCF76-77AB-48E5-9DDD-066A8CCF1178@gmail.com>
Il 17/08/2014 08:23, Nadav Amit ha scritto:
>>> >> Although this check is mentioned in table 7-1 of the SDM as causing a
>>> >> #TSS exception, it is not mentioned in table 6-6 that lists "invalid TSS
>>> >> conditions" which cause #TSS exceptions.
>>> >>
>>> >> Thus, I recommend on reverting commit 5045b46803, or alternatively
>>> >> rechecking task-switch behavior on bare-metal.
>> >
>> > Can you provide a kvm-unit-tests test for this?
> I need to put time into writing one. However, the unit test would prove nothing.
> The question is how bare-metal behaves. According to what I see, it does not perform this check.
Yes, but I still prefer to have a test, in case I find some time to fix
kvm-unit-tests to work on bare metal (or on Bochs).
There are already a few task switch tests (32-bit only).
Paolo
next prev parent reply other threads:[~2014-08-17 6:28 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-13 17:14 Regression problem with commit 5045b46803 Nadav Amit
2014-08-17 6:17 ` Paolo Bonzini
2014-08-17 6:23 ` Nadav Amit
2014-08-17 6:28 ` Paolo Bonzini [this message]
2014-08-17 7:19 ` Nadav Amit
2014-08-17 9:35 ` Paolo Bonzini
2014-08-17 19:32 ` [PATCH] KVM: x86: Revert "check CS.DPL against RPL during task switch" Nadav Amit
2014-08-17 19:34 ` [PATCH kvm-unit-tests] x86: Test task-switch with cs.rpl != cs.dpl Nadav Amit
2014-08-19 10:27 ` Paolo Bonzini
2014-08-19 13:04 ` [PATCH kvm-unit-tests v2] " Nadav Amit
2014-08-19 13:28 ` Paolo Bonzini
2014-08-19 13:34 ` Nadav Amit
2014-08-19 13:37 ` Paolo Bonzini
2014-08-17 21:09 ` [PATCH] KVM: x86: Revert "check CS.DPL against RPL during task switch" Paolo Bonzini
2014-08-17 21:13 ` Paolo Bonzini
2014-08-17 21:33 ` Nadav Amit
2014-08-17 21:52 ` Paolo Bonzini
2014-08-17 21:39 ` Nadav Amit
2014-08-17 21:52 ` Paolo Bonzini
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