From: Tamas K Lengyel <tamas.k.lengyel@gmail.com>
To: Andrew Cooper <andrew.cooper3@citrix.com>
Cc: "Tamas K Lengyel" <tamas.lengyel@intel.com>,
"Wei Liu" <wl@xen.org>,
"Michał Leszczyński" <michal.leszczynski@cert.pl>,
"Kang, Luwei" <luwei.kang@intel.com>,
"Jan Beulich" <jbeulich@suse.com>,
Xen-devel <xen-devel@lists.xenproject.org>,
"Roger Pau Monné" <roger.pau@citrix.com>
Subject: Re: [PATCH v4 01/10] x86/vmx: add Intel PT MSR definitions
Date: Tue, 30 Jun 2020 12:03:17 -0600 [thread overview]
Message-ID: <CABfawh=N-PVmxDWa=QR5ttt=rZ7gmh148ZsjRV+EX7Td525Wuw@mail.gmail.com> (raw)
In-Reply-To: <b1d4177d-8a00-06fb-97fd-bf5f1ba42319@citrix.com>
On Tue, Jun 30, 2020 at 11:39 AM Andrew Cooper
<andrew.cooper3@citrix.com> wrote:
>
> On 30/06/2020 13:33, Michał Leszczyński wrote:
> > diff --git a/xen/include/asm-x86/msr-index.h b/xen/include/asm-x86/msr-index.h
> > index b328a47ed8..0203029be9 100644
> > --- a/xen/include/asm-x86/msr-index.h
> > +++ b/xen/include/asm-x86/msr-index.h
> > @@ -69,6 +69,43 @@
> > #define MSR_MCU_OPT_CTRL 0x00000123
> > #define MCU_OPT_CTRL_RNGDS_MITG_DIS (_AC(1, ULL) << 0)
> >
> > +/* Intel PT MSRs */
> > +#define MSR_RTIT_OUTPUT_BASE 0x00000560
> > +
> > +#define MSR_RTIT_OUTPUT_MASK 0x00000561
> > +
> > +#define MSR_RTIT_CTL 0x00000570
> > +#define RTIT_CTL_TRACEEN (_AC(1, ULL) << 0)
> > +#define RTIT_CTL_CYCEN (_AC(1, ULL) << 1)
>
> In addition to what Jan has said, please can we be consistent with an
> underscore (or not) before EN. Preferably with, so these would become
> TRACE_EN and CYC_EN.
>
> That said, there are a lot of bit definitions which aren't used at all.
> IMO, it would be better to introduce defines when you use them.
In the past I found it very valuable when this type of plumbing was
already present in Xen instead of me having to go into the SDM to digg
out the magic numbers. So while some of the bits might not be used
right now I also don't see any downside in having them, just in case.
Tamas
next prev parent reply other threads:[~2020-06-30 18:04 UTC|newest]
Thread overview: 75+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-30 12:33 [PATCH v4 00/10] Implement support for external IPT monitoring Michał Leszczyński
2020-06-30 12:33 ` [PATCH v4 01/10] x86/vmx: add Intel PT MSR definitions Michał Leszczyński
2020-06-30 16:23 ` Jan Beulich
2020-06-30 17:37 ` Andrew Cooper
2020-06-30 18:03 ` Tamas K Lengyel [this message]
2020-06-30 18:27 ` Michał Leszczyński
2020-07-01 17:52 ` Andrew Cooper
2020-06-30 12:33 ` [PATCH v4 02/10] x86/vmx: add IPT cpu feature Michał Leszczyński
2020-07-01 9:49 ` Roger Pau Monné
2020-07-01 15:12 ` Julien Grall
2020-07-01 16:06 ` Andrew Cooper
2020-07-01 16:17 ` Julien Grall
2020-07-01 16:18 ` Julien Grall
2020-07-01 17:26 ` Andrew Cooper
2020-07-01 18:02 ` Julien Grall
2020-07-01 18:06 ` Andrew Cooper
2020-07-01 18:09 ` Julien Grall
2020-07-02 8:29 ` Jan Beulich
2020-07-02 8:42 ` Julien Grall
2020-07-02 8:50 ` Jan Beulich
2020-07-02 8:54 ` Julien Grall
2020-07-02 9:18 ` Jan Beulich
2020-07-02 9:57 ` Julien Grall
2020-07-02 13:30 ` Jan Beulich
2020-07-02 14:14 ` Julien Grall
2020-07-02 14:17 ` Jan Beulich
2020-07-02 14:31 ` Julien Grall
2020-07-02 20:28 ` Michał Leszczyński
2020-07-03 7:58 ` Julien Grall
2020-07-04 19:16 ` Michał Leszczyński
2020-07-01 21:42 ` Andrew Cooper
2020-07-02 8:10 ` Roger Pau Monné
2020-07-02 8:34 ` Jan Beulich
2020-07-02 20:29 ` Michał Leszczyński
2020-06-30 12:33 ` [PATCH v4 03/10] tools/libxl: add vmtrace_pt_size parameter Michał Leszczyński
2020-07-01 10:05 ` Roger Pau Monné
2020-07-02 9:00 ` Roger Pau Monné
2020-07-02 16:23 ` Michał Leszczyński
2020-07-03 9:44 ` Roger Pau Monné
2020-07-03 9:56 ` Jan Beulich
2020-07-03 10:11 ` Roger Pau Monné
2020-07-04 17:23 ` Julien Grall
2020-07-06 8:46 ` Jan Beulich
2020-07-07 8:44 ` Julien Grall
2020-07-07 9:10 ` Jan Beulich
2020-07-07 9:16 ` Julien Grall
2020-07-07 11:17 ` Michał Leszczyński
2020-07-07 11:21 ` Jan Beulich
2020-07-07 11:35 ` Michał Leszczyński
2020-07-02 10:24 ` Anthony PERARD
2020-07-04 17:48 ` Julien Grall
2020-06-30 12:33 ` [PATCH v4 04/10] x86/vmx: implement processor tracing for VMX Michał Leszczyński
2020-07-01 10:30 ` Roger Pau Monné
2020-06-30 12:33 ` [PATCH v4 05/10] common/domain: allocate vmtrace_pt_buffer Michał Leszczyński
2020-07-01 10:38 ` Roger Pau Monné
2020-07-01 15:35 ` Julien Grall
2020-06-30 12:33 ` [PATCH v4 06/10] memory: batch processing in acquire_resource() Michał Leszczyński
2020-07-01 10:46 ` Roger Pau Monné
2020-07-03 10:35 ` Julien Grall
2020-07-03 10:52 ` Paul Durrant
2020-07-03 11:17 ` Julien Grall
2020-07-03 11:22 ` Jan Beulich
2020-07-03 11:36 ` Julien Grall
2020-07-03 12:50 ` Jan Beulich
2020-07-03 11:40 ` Paul Durrant
2020-06-30 12:33 ` [PATCH v4 07/10] x86/mm: add vmtrace_buf resource type Michał Leszczyński
2020-07-01 10:52 ` Roger Pau Monné
2020-06-30 12:33 ` [PATCH v4 08/10] x86/domctl: add XEN_DOMCTL_vmtrace_op Michał Leszczyński
2020-07-01 11:00 ` Roger Pau Monné
2020-06-30 12:33 ` [PATCH v4 09/10] tools/libxc: add xc_vmtrace_* functions Michał Leszczyński
2020-07-21 10:52 ` Wei Liu
2020-06-30 12:33 ` [PATCH v4 10/10] tools/proctrace: add proctrace tool Michał Leszczyński
2020-07-02 15:10 ` Andrew Cooper
2020-07-21 10:52 ` Wei Liu
2020-06-30 12:48 ` [PATCH v4 00/10] Implement support for external IPT monitoring Hubert Jasudowicz
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