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Message-ID: <87bce8896d05c026647a957ad49de5c5582a766b.camel@infradead.org>
Subject: Re: [PATCH v2 13/15] KVM: x86: Kill cur_tsc_{nsec,offset,write}
 fields
From: David Woodhouse <dwmw2@infradead.org>
To: Chenyi Qiang <chenyi.qiang@intel.com>, kvm@vger.kernel.org
Cc: Paolo Bonzini <pbonzini@redhat.com>, Jonathan Corbet <corbet@lwn.net>, 
 Sean Christopherson <seanjc@google.com>, Thomas Gleixner
 <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>, Borislav Petkov
 <bp@alien8.de>, Dave Hansen <dave.hansen@linux.intel.com>, x86@kernel.org,
 "H. Peter Anvin" <hpa@zytor.com>,  Paul Durrant <paul@xen.org>, Shuah Khan
 <shuah@kernel.org>, linux-doc@vger.kernel.org, 
 linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, Oliver Upton
 <oliver.upton@linux.dev>, Marcelo Tosatti <mtosatti@redhat.com>, 
 jalliste@amazon.co.uk, sveith@amazon.de, zide.chen@intel.com, Dongli Zhang
 <dongli.zhang@oracle.com>
Date: Tue, 14 May 2024 14:17:16 +0100
In-Reply-To: <0867c527-6fe5-4f54-adcc-0344e9416f9b@intel.com>
References: <20240427111929.9600-1-dwmw2@infradead.org>
	 <20240427111929.9600-14-dwmw2@infradead.org>
	 <0867c527-6fe5-4f54-adcc-0344e9416f9b@intel.com>
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On Fri, 2024-05-10 at 17:03 +0800, Chenyi Qiang wrote:
>=20
> Do we need to track vcpu->arch.this_tsc_nsec/this_tsc_write? At least
> they are still used in compute_guest_tsc() to calculate the guest
> tsc.

Ah yes, that's true. Good catch; thanks.

That should be caught by a test case which runs the guest TSC at a
higher speed than the host, but *without* hardware TSC scaling.

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