From: Greg KH <gregkh@linuxfoundation.org>
To: Paul Mackerras <paulus@ozlabs.org>
Cc: stable@vger.kernel.org
Subject: Re: [PATCH 3/3 v4.9.y] KVM: PPC: Book3S HV: Enable TM before accessing TM registers
Date: Thu, 3 Aug 2017 12:22:45 -0700 [thread overview]
Message-ID: <20170803192245.GE26218@kroah.com> (raw)
In-Reply-To: <20170731010830.bq74c24g4nrxl4z6@oak.ozlabs.ibm.com>
On Mon, Jul 31, 2017 at 11:08:30AM +1000, Paul Mackerras wrote:
> commit e47057151422a67ce08747176fa21cb3b526a2c9 upstream.
>
> Commit 46a704f8409f ("KVM: PPC: Book3S HV: Preserve userspace HTM state
> properly", 2017-06-15) added code to read transactional memory (TM)
> registers but forgot to enable TM before doing so. The result is
> that if userspace does have live values in the TM registers, a KVM_RUN
> ioctl will cause a host kernel crash like this:
>
I also have already taken this one, right?
next prev parent reply other threads:[~2017-08-03 19:22 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-31 1:06 [PATCH 1/3 v4.9.y] KVM: PPC: Book3S HV: Restore critical SPRs to host values on guest exit Paul Mackerras
2017-07-31 1:07 ` [PATCH 2/3 v4.9.y] KVM: PPC: Book3S HV: Save/restore host values of debug registers Paul Mackerras
2017-07-31 1:08 ` [PATCH 3/3 v4.9.y] KVM: PPC: Book3S HV: Enable TM before accessing TM registers Paul Mackerras
2017-08-03 19:22 ` Greg KH [this message]
2017-08-04 4:44 ` Paul Mackerras
2017-08-03 19:21 ` [PATCH 1/3 v4.9.y] KVM: PPC: Book3S HV: Restore critical SPRs to host values on guest exit Greg KH
2017-08-04 4:31 ` Paul Mackerras
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