From: Paul Mackerras <paulus@ozlabs.org>
To: Laurent Dufour <ldufour@linux.ibm.com>
Cc: kvm-ppc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
linux-kernel@vger.kernel.org, groug@kaod.org, mpe@ellerman.id.au,
sukadev@linux.ibm.com, linuxram@us.ibm.com
Subject: Re: [PATCH v2] KVM: PPC: Book3S HV: relax check on H_SVM_INIT_ABORT
Date: Wed, 27 May 2020 14:16:49 +1000 [thread overview]
Message-ID: <20200527041649.GD293451@thinks.paulus.ozlabs.org> (raw)
In-Reply-To: <20200520174308.77820-1-ldufour@linux.ibm.com>
On Wed, May 20, 2020 at 07:43:08PM +0200, Laurent Dufour wrote:
> The commit 8c47b6ff29e3 ("KVM: PPC: Book3S HV: Check caller of H_SVM_*
> Hcalls") added checks of secure bit of SRR1 to filter out the Hcall
> reserved to the Ultravisor.
>
> However, the Hcall H_SVM_INIT_ABORT is made by the Ultravisor passing the
> context of the VM calling UV_ESM. This allows the Hypervisor to return to
> the guest without going through the Ultravisor. Thus the Secure bit of SRR1
> is not set in that particular case.
>
> In the case a regular VM is calling H_SVM_INIT_ABORT, this hcall will be
> filtered out in kvmppc_h_svm_init_abort() because kvm->arch.secure_guest is
> not set in that case.
>
> Fixes: 8c47b6ff29e3 ("KVM: PPC: Book3S HV: Check caller of H_SVM_* Hcalls")
> Signed-off-by: Laurent Dufour <ldufour@linux.ibm.com>
Thanks, applied to my kvm-ppc-next branch. I expanded the comment in
the code a little.
Paul.
next prev parent reply other threads:[~2020-05-27 4:21 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-20 16:51 [PATCH] KVM: PPC: Book3S HV: relax check on H_SVM_INIT_ABORT Laurent Dufour
2020-05-20 17:32 ` Greg Kurz
2020-05-20 17:35 ` Laurent Dufour
2020-05-20 17:43 ` [PATCH v2] " Laurent Dufour
2020-05-20 18:23 ` Greg Kurz
2020-05-21 6:08 ` Ram Pai
2020-05-27 4:16 ` Paul Mackerras [this message]
2020-05-27 9:23 ` Laurent Dufour
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=20200527041649.GD293451@thinks.paulus.ozlabs.org \
--to=paulus@ozlabs.org \
--cc=groug@kaod.org \
--cc=kvm-ppc@vger.kernel.org \
--cc=ldufour@linux.ibm.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linuxppc-dev@lists.ozlabs.org \
--cc=linuxram@us.ibm.com \
--cc=mpe@ellerman.id.au \
--cc=sukadev@linux.ibm.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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).