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Wed, 25 Mar 2020 18:24:55 +0100 (CET) Received: from kaod.org (lns-bzn-46-82-253-208-248.adsl.proxad.net [82.253.208.248]) (Authenticated sender: groug@kaod.org) by player731.ha.ovh.net (Postfix) with ESMTPSA id 5F8251096C31A; Wed, 25 Mar 2020 17:24:45 +0000 (UTC) Date: Wed, 25 Mar 2020 18:24:44 +0100 From: Greg Kurz To: Nicholas Piggin Subject: Re: [PATCH v2 3/4] ppc/spapr: Add FWNMI machine check delivery warnings Message-ID: <20200325182444.4785d131@bahia.lan> In-Reply-To: <20200325142906.221248-4-npiggin@gmail.com> References: <20200325142906.221248-1-npiggin@gmail.com> <20200325142906.221248-4-npiggin@gmail.com> X-Mailer: Claws Mail 3.17.4 (GTK+ 2.24.32; x86_64-redhat-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Ovh-Tracer-Id: 10657487044611971523 X-VR-SPAMSTATE: OK X-VR-SPAMSCORE: -100 X-VR-SPAMCAUSE: gggruggvucftvghtrhhoucdtuddrgedugedrudehgedgjeeiucetufdoteggodetrfdotffvucfrrhhofhhilhgvmecuqfggjfdpvefjgfevmfevgfenuceurghilhhouhhtmecuhedttdenucesvcftvggtihhpihgvnhhtshculddquddttddmnecujfgurhepfffhvffukfgjfhfogggtgfesthejredtredtvdenucfhrhhomhepifhrvghgucfmuhhriicuoehgrhhouhhgsehkrghougdrohhrgheqnecukfhppedtrddtrddtrddtpdekvddrvdehfedrvddtkedrvdegkeenucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmhepmhhouggvpehsmhhtphdqohhuthdphhgvlhhopehplhgrhigvrhejfedurdhhrgdrohhvhhdrnhgvthdpihhnvghtpedtrddtrddtrddtpdhmrghilhhfrhhomhepghhrohhugheskhgrohgurdhorhhgpdhrtghpthhtohepqhgvmhhuqdguvghvvghlsehnohhnghhnuhdrohhrgh X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 46.105.44.175 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Aravinda Prasad , Alexey Kardashevskiy , Mahesh Salgaonkar , qemu-devel@nongnu.org, =?UTF-8?B?Q8OpZHJpYw==?= Le Goater , Ganesh Goudar , qemu-ppc@nongnu.org, David Gibson Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Thu, 26 Mar 2020 00:29:05 +1000 Nicholas Piggin wrote: > Add some messages which explain problems and guest misbehaviour that > may be difficult to diagnose in rare cases of machine checks. > > Signed-off-by: Nicholas Piggin > --- Reviewed-by: Greg Kurz > hw/ppc/spapr_events.c | 4 ++++ > hw/ppc/spapr_rtas.c | 3 +++ > 2 files changed, 7 insertions(+) > > diff --git a/hw/ppc/spapr_events.c b/hw/ppc/spapr_events.c > index a908c5d0e9..c8964eb25d 100644 > --- a/hw/ppc/spapr_events.c > +++ b/hw/ppc/spapr_events.c > @@ -833,6 +833,8 @@ static void spapr_mce_dispatch_elog(PowerPCCPU *cpu, bool recovered) > /* get rtas addr from fdt */ > rtas_addr = spapr_get_rtas_addr(); > if (!rtas_addr) { > + error_report( > +"FWNMI: Unable to deliver machine check to guest: rtas_addr not found."); > qemu_system_guest_panicked(NULL); > g_free(ext_elog); > return; > @@ -874,6 +876,8 @@ void spapr_mce_req_event(PowerPCCPU *cpu, bool recovered) > * that CPU called "ibm,nmi-interlock") > */ > if (spapr->fwnmi_machine_check_interlock == cpu->vcpu_id) { > + error_report( > +"FWNMI: Unable to deliver machine check to guest: nested machine check."); > qemu_system_guest_panicked(NULL); > return; > } > diff --git a/hw/ppc/spapr_rtas.c b/hw/ppc/spapr_rtas.c > index 29abe66d01..bcac0d00e7 100644 > --- a/hw/ppc/spapr_rtas.c > +++ b/hw/ppc/spapr_rtas.c > @@ -462,6 +462,9 @@ static void rtas_ibm_nmi_interlock(PowerPCCPU *cpu, > } > > if (spapr->fwnmi_machine_check_addr == -1) { > + qemu_log_mask(LOG_GUEST_ERROR, > +"FWNMI: ibm,nmi-interlock RTAS called with FWNMI not registered.\n"); > + > /* NMI register not called */ > rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); > return;