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From: Sean Christopherson <sean.j.christopherson@intel.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Thomas Gleixner" <tglx@linutronix.de>,
	"Ingo Molnar" <mingo@redhat.com>,
	"Borislav Petkov" <bp@alien8.de>,
	x86@kernel.org, "Peter Zijlstra" <peterz@infradead.org>,
	"Arnaldo Carvalho de Melo" <acme@kernel.org>,
	"Radim Krčmář" <rkrcmar@redhat.com>,
	"Tony Luck" <tony.luck@intel.com>,
	"Tony W Wang-oc" <TonyWWang-oc@zhaoxin.com>,
	"H. Peter Anvin" <hpa@zytor.com>,
	"Mark Rutland" <mark.rutland@arm.com>,
	"Alexander Shishkin" <alexander.shishkin@linux.intel.com>,
	"Jiri Olsa" <jolsa@redhat.com>,
	"Namhyung Kim" <namhyung@kernel.org>,
	"Vitaly Kuznetsov" <vkuznets@redhat.com>,
	"Wanpeng Li" <wanpengli@tencent.com>,
	"Jim Mattson" <jmattson@google.com>,
	"Joerg Roedel" <joro@8bytes.org>,
	linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
	linux-edac@vger.kernel.org, "Borislav Petkov" <bp@suse.de>,
	"Jarkko Sakkinen" <jarkko.sakkinen@linux.intel.com>
Subject: Re: [PATCH 09/16] x86/vmx: Introduce VMX_FEATURES_*
Date: Mon, 7 Oct 2019 10:13:33 -0700	[thread overview]
Message-ID: <20191007171333.GE18016@linux.intel.com> (raw)
In-Reply-To: <149d4422-b955-9118-e7df-e135075ad490@redhat.com>

On Mon, Oct 07, 2019 at 07:08:28PM +0200, Paolo Bonzini wrote:
> On 04/10/19 23:56, Sean Christopherson wrote:
> > +#define VMX_FEATURE_RDSEED_EXITING	( 2*32+ 16) /* "" VM-Exit on RDSEED */
> > +#define VMX_FEATURE_PAGE_MOD_LOGGING	( 2*32+ 17) /* "pml" Log dirty pages into buffer */
> > +#define VMX_FEATURE_EPT_VIOLATION_VE	( 2*32+ 18) /* "" Conditionally reflect EPT violations as #VE exceptions */
> > +#define VMX_FEATURE_PT_CONCEAL_VMX	( 2*32+ 19) /* "" Suppress VMX indicators in Processor Trace */
> > +#define VMX_FEATURE_XSAVES		( 2*32+ 20) /* "" Enable XSAVES and XRSTORS in guest */
> > +#define VMX_FEATURE_RESERVED_PIN_21	( 2*32+ 21) /* "" Reserved */
> > +#define VMX_FEATURE_MODE_BASED_EPT_EXEC	( 2*32+ 22) /* Enable separate EPT EXEC bits for supervisor vs. user */
> > +#define VMX_FEATURE_RESERVED_PIN_23	( 2*32+ 23) /* "" Reserved */
> > +#define VMX_FEATURE_PT_USE_GPA		( 2*32+ 24) /* "" Processor Trace logs GPAs */
> > +#define VMX_FEATURE_TSC_SCALING		( 2*32+ 25) /* Scale hardware TSC when read in guest */
> > +#define VMX_FEATURE_RESERVED_PIN_26	( 2*32+ 26) /* "" Reserved */
> > +#define VMX_FEATURE_RESERVED_PIN_27	( 2*32+ 27) /* "" Reserved */
> > +#define VMX_FEATURE_ENCLV_EXITING	( 2*32+ 28) /* "" VM-Exit on ENCLV (leaf dependent) */
> > +#define VMX_FEATURE_RESERVED_PIN_29	( 2*32+ 29) /* "" Reserved */
> > +#define VMX_FEATURE_RESERVED_PIN_30	( 2*32+ 30) /* "" Reserved */
> > +#define VMX_FEATURE_RESERVED_PIN_31	( 2*32+ 31) /* "" Reserved */
> 
> Pasto on the reserved bit names, but in general why is it useful to
> define them?

Doh.  It was mostly so that I could more easily cross-reference the SDM
and visually see that I wasn't skipping bits.  No argument from me if it'd
be preferably to omit them.

  reply	other threads:[~2019-10-07 17:13 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-04 21:55 [PATCH 00/16] x86/cpu: Clean up handling of VMX features Sean Christopherson
2019-10-04 21:56 ` [PATCH 01/16] x86/intel: Initialize IA32_FEATURE_CONTROL MSR at boot Sean Christopherson
2019-10-07 17:05   ` Paolo Bonzini
2019-10-07 17:10     ` Sean Christopherson
2019-10-04 21:56 ` [PATCH 02/16] x86/mce: WARN once if IA32_FEATURE_CONTROL MSR is left unlocked Sean Christopherson
2019-10-04 21:56 ` [PATCH 03/16] x86/centaur: Use common IA32_FEATURE_CONTROL MSR initialization Sean Christopherson
2019-10-04 21:56 ` [PATCH 04/16] x86/zhaoxin: " Sean Christopherson
2019-10-04 21:56 ` [PATCH 05/16] KVM: VMX: Drop initialization of IA32_FEATURE_CONTROL MSR Sean Christopherson
2019-10-04 23:24   ` Jim Mattson
2019-10-04 21:56 ` [PATCH 06/16] x86/cpu: Clear VMX feature flag if VMX is not fully enabled Sean Christopherson
2019-10-04 21:56 ` [PATCH 07/16] KVM: VMX: Use VMX feature flag to query BIOS enabling Sean Christopherson
2019-10-04 23:26   ` Jim Mattson
2019-10-04 21:56 ` [PATCH 08/16] KVM: VMX: Check for full VMX support when verifying CPU compatibility Sean Christopherson
2019-10-04 23:35   ` Jim Mattson
2019-10-04 21:56 ` [PATCH 09/16] x86/vmx: Introduce VMX_FEATURES_* Sean Christopherson
2019-10-07 17:08   ` Paolo Bonzini
2019-10-07 17:13     ` Sean Christopherson [this message]
2019-10-04 21:56 ` [PATCH 10/16] x86/cpu: Detect VMX features on Intel, Centaur and Zhaoxin CPUs Sean Christopherson
2019-10-07 17:11   ` Paolo Bonzini
2019-10-07 19:54     ` Sean Christopherson
2019-10-08  6:55       ` Paolo Bonzini
2019-10-04 21:56 ` [PATCH 11/16] x86/cpu: Print VMX features as separate line item in /proc/cpuinfo Sean Christopherson
2019-10-07 17:12   ` Paolo Bonzini
2019-10-07 19:56     ` Sean Christopherson
2019-10-08  6:57       ` Paolo Bonzini
2019-10-08 16:53         ` Jim Mattson
2019-10-09 19:16         ` Sean Christopherson
2019-10-09 21:13           ` Paolo Bonzini
2019-10-04 21:56 ` [PATCH 12/16] x86/cpufeatures: Drop synthetic VMX feature flags Sean Christopherson
2019-10-04 21:56 ` [PATCH 13/16] KVM: VMX: Use VMX_FEATURE_* flags to define VMCS control bits Sean Christopherson
2019-10-04 21:56 ` [PATCH 14/16] x86/cpufeatures: Clean up synthetic virtualization flags Sean Christopherson
2019-10-04 21:56 ` [PATCH 15/16] perf/x86: Provide stubs of KVM helpers for non-Intel CPUs Sean Christopherson
2019-10-04 21:56 ` [PATCH 16/16] KVM: VMX: Allow KVM_INTEL when building for Centaur and/or Zhaoxin CPUs Sean Christopherson

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