From: Avi Kivity <avi@redhat.com>
To: Marcelo Tosatti <mtosatti@redhat.com>
Cc: kvm@vger.kernel.org
Subject: Re: [patch 3/3] Add mce test
Date: Mon, 06 Sep 2010 17:53:20 +0300 [thread overview]
Message-ID: <4C850060.2000303@redhat.com> (raw)
In-Reply-To: <20100905211722.GA3030@amt.cnet>
On 09/06/2010 12:17 AM, Marcelo Tosatti wrote:
> On Sun, Sep 05, 2010 at 11:15:16AM +0300, Avi Kivity wrote:
>> On 09/03/2010 02:36 AM, Marcelo Tosatti wrote:
>>> +
>>> +int main(void)
>>> +{
>>> + unsigned long long status, addr;
>>> + int bank;
>>> +
>>> + smp_init();
>>> + init_idt();
>>> + set_idt_entry(18, do_handle_mce);
>>> +
>>> + write_cr4(read_cr4() | X86_CR4_MCE);
>>> +
>>> + wrmsr(MSR_IA32_MCG_CTL, ~0ULL);
>>> + wrmsr(MSR_IA32_MC0_CTL, ~0ULL);
>>> +
>>> + status = MCI_STATUS_VAL|MCI_STATUS_UC;
>>> + addr = 0x7ffffff;
>>> + bank = 0;
>>> + ex_done = 0;
>>> + /* mce cpu bank status mcgstatus addr misc */
>>> + monitor_printf("mce %d %d 0x%llx 1 0x%llx 1\n", 0, bank, status, addr);
>> Wow, this is really evil.
>>
>> I guess it could be done more nicely via the api unit tests we
>> talked about during kf2010?
> I don't remember the details.
Map gpa:hva 1:1; map gva:gpa 1:1; do direct calls between host userspace
and guest kernel.
Hope to post a patch soon.
> What do you consider evil?
Not really evil. It's a nice roundabout loop guest -> testdev ->
chardev -> host -> chardev -> monitor -> kvm -> guest.
Works well, but only for features that are directly controlled via the
monitor. To test save/restore (for vcpu events or fpu) we need
something more direct (guest -> host userspace -> guest).
--
error compiling committee.c: too many arguments to function
prev parent reply other threads:[~2010-09-06 14:53 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-02 23:36 [patch 0/3] add mce test Marcelo Tosatti
2010-09-02 23:36 ` [patch 1/3] kvm test: add monitor_printf Marcelo Tosatti
2010-09-03 7:56 ` Paolo Bonzini
2010-09-03 16:48 ` Marcelo Tosatti
2010-09-03 17:23 ` [patch 1/3] kvm test: add monitor_printf (v2) Marcelo Tosatti
2010-09-02 23:36 ` [patch 2/3] kvm test: add kvm-unit.cfg Marcelo Tosatti
2010-09-02 23:36 ` [patch 3/3] Add mce test Marcelo Tosatti
2010-09-05 8:15 ` Avi Kivity
2010-09-05 21:17 ` Marcelo Tosatti
2010-09-06 14:53 ` Avi Kivity [this message]
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