From mboxrd@z Thu Jan 1 00:00:00 1970 From: Scott Wood Date: Tue, 07 May 2013 23:40:43 +0000 Subject: Re: [v1][KVM][PATCH 1/1] kvm:ppc:booehv: direct ISI exception to Guest Message-Id: <1367970043.3398.39@snotra> List-Id: References: <1367924791-24394-1-git-send-email-tiejun.chen@windriver.com> In-Reply-To: <1367924791-24394-1-git-send-email-tiejun.chen@windriver.com> (from tiejun.chen@windriver.com on Tue May 7 06:06:30 2013) MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Tiejun Chen Cc: agraf@suse.de, kvm-ppc@vger.kernel.org, kvm@vger.kernel.org, linuxppc-dev@lists.ozlabs.org On 05/07/2013 06:06:30 AM, Tiejun Chen wrote: > We also can direct ISI exception to Guest like DSI. > > Signed-off-by: Tiejun Chen > --- > arch/powerpc/kvm/booke_emulate.c | 3 +++ > arch/powerpc/kvm/e500mc.c | 3 ++- > 2 files changed, 5 insertions(+), 1 deletion(-) Are you seeing a real performance improvement from this? This will interfere somewhat with using the VF bit, if we were to ever do so, since VF only affects data accesses (and so the guest would see an ISI storm rather than a machine check if it tries to execute from such an address). -Scott