From: Joerg Roedel <joerg.roedel@amd.com>
To: Avi Kivity <avi@redhat.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>,
Sheng Yang <sheng@linux.intel.com>,
kvm@vger.kernel.org
Subject: Re: [PATCH 4/5] KVM: Lazify fpu activation and deactivation
Date: Wed, 6 Jan 2010 11:47:45 +0100 [thread overview]
Message-ID: <20100106104744.GJ14679@amd.com> (raw)
In-Reply-To: <4B4400F5.2010309@redhat.com>
On Wed, Jan 06, 2010 at 05:18:13AM +0200, Avi Kivity wrote:
> Joerg, what was the reason the initial npt implementation did not do
> lazy fpu switching?
The lazy fpu switching code needed cr3 accesses to be intercepted. With
NPT this was the only reason left to intercept cr3 so I decided to
switch lazy fpu switching off and don't intercept cr3 accesses.
Joerg
next prev parent reply other threads:[~2010-01-06 10:48 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-30 16:25 [PATCH 0/5] Lazy fpu, cr0.ts Avi Kivity
2009-12-30 16:25 ` [PATCH 1/5] KVM: VMX: trace clts and lmsw instructions as cr accesses Avi Kivity
2009-12-30 16:25 ` [PATCH 2/5] KVM: Replace read accesses of vcpu->arch.cr0 by an accessor Avi Kivity
2009-12-30 16:25 ` [PATCH 3/5] KVM: VMX: Allow the guest to own some cr0 bits Avi Kivity
2009-12-30 16:25 ` [PATCH 4/5] KVM: Lazify fpu activation and deactivation Avi Kivity
2010-01-06 0:25 ` Marcelo Tosatti
2010-01-06 3:18 ` Avi Kivity
2010-01-06 6:21 ` Avi Kivity
2010-01-06 10:47 ` Joerg Roedel [this message]
2010-01-06 11:00 ` Avi Kivity
2010-01-14 13:11 ` Avi Kivity
2010-01-14 13:11 ` Avi Kivity
2010-01-14 14:34 ` Lucas Meneghel Rodrigues
2010-01-14 15:04 ` Avi Kivity
2009-12-30 16:25 ` [PATCH 5/5] KVM: VMX: Give the guest ownership of cr0.ts when the fpu is active Avi Kivity
2010-01-06 0:40 ` Marcelo Tosatti
2009-12-31 9:23 ` [PATCH 0/5] Lazy fpu, cr0.ts Sheng Yang
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20100106104744.GJ14679@amd.com \
--to=joerg.roedel@amd.com \
--cc=avi@redhat.com \
--cc=kvm@vger.kernel.org \
--cc=mtosatti@redhat.com \
--cc=sheng@linux.intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.