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Re: [PATCH v1 1/3] i386: Remove the limitation of IP payloads for Intel
From: |
Paolo Bonzini |
Subject: |
Re: [PATCH v1 1/3] i386: Remove the limitation of IP payloads for Intel PT |
Date: |
Fri, 25 Sep 2020 22:23:49 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.11.0 |
On 25/09/20 18:54, Eduardo Habkost wrote:
> On Fri, Sep 25, 2020 at 04:42:26PM +0000, Strong, Beeman wrote:
>> LIP=0 will differ from LIP=1 behavior only when CSbase is non-zero, which
>> requires 32-bit code. In that case a LIP=0 implementation will provide only
>> the EIP offset from CSbase in IP packets (like TIP or FUP), while LIP=1
>> implementation will provide the full LIP (CSbase + EIP offset).
>>
> Thanks. Is it possible to make KVM emulate LIP=0 behavior
> correctly on LIP=1 hosts, or vice versa?
No, it's not possible. KVM doesn't have a say on what the processor
writes in the tracing packets.
Paolo
- Re: [PATCH v1 1/3] i386: Remove the limitation of IP payloads for Intel PT, Eduardo Habkost, 2020/09/25
- RE: [PATCH v1 1/3] i386: Remove the limitation of IP payloads for Intel PT, Strong, Beeman, 2020/09/25
- Re: [PATCH v1 1/3] i386: Remove the limitation of IP payloads for Intel PT, Eduardo Habkost, 2020/09/25
- Re: [PATCH v1 1/3] i386: Remove the limitation of IP payloads for Intel PT,
Paolo Bonzini <=
- Re: [PATCH v1 1/3] i386: Remove the limitation of IP payloads for Intel PT, Eduardo Habkost, 2020/09/25
- Re: [PATCH v1 1/3] i386: Remove the limitation of IP payloads for Intel PT, Paolo Bonzini, 2020/09/25
- RE: [PATCH v1 1/3] i386: Remove the limitation of IP payloads for Intel PT, Kang, Luwei, 2020/09/28
- Re: [PATCH v1 1/3] i386: Remove the limitation of IP payloads for Intel PT, Paolo Bonzini, 2020/09/28
- RE: [PATCH v1 1/3] i386: Remove the limitation of IP payloads for Intel PT, Kang, Luwei, 2020/09/28
- Re: [PATCH v1 1/3] i386: Remove the limitation of IP payloads for Intel PT, Eduardo Habkost, 2020/09/28
- RE: [PATCH v1 1/3] i386: Remove the limitation of IP payloads for Intel PT, Kang, Luwei, 2020/09/28
- Re: [PATCH v1 1/3] i386: Remove the limitation of IP payloads for Intel PT, Eduardo Habkost, 2020/09/28
- Re: [PATCH v1 1/3] i386: Remove the limitation of IP payloads for Intel PT, Paolo Bonzini, 2020/09/28
- RE: [PATCH v1 1/3] i386: Remove the limitation of IP payloads for Intel PT, Kang, Luwei, 2020/09/28