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Mon, 08 Feb 2021 17:36:49 -0800 (PST) Received: from localhost ([220.240.226.199]) by smtp.gmail.com with ESMTPSA id o1sm19501986pgq.1.2021.02.08.17.36.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 08 Feb 2021 17:36:48 -0800 (PST) Date: Tue, 09 Feb 2021 11:36:43 +1000 From: Nicholas Piggin Subject: Re: [PATCH v5 12/22] powerpc/syscall: Change condition to check MSR_RI To: Benjamin Herrenschmidt , Christophe Leroy , Michael Ellerman , msuchanek@suse.de, Paul Mackerras References: <67820fada8dd6a8fe9d7b666f175d4cc9d8de87e.1612796617.git.christophe.leroy@csgroup.eu> In-Reply-To: <67820fada8dd6a8fe9d7b666f175d4cc9d8de87e.1612796617.git.christophe.leroy@csgroup.eu> MIME-Version: 1.0 Message-Id: <1612834209.4lzq8y2p6t.astroid@bobo.none> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" Excerpts from Christophe Leroy's message of February 9, 2021 1:10 am: > In system_call_exception(), MSR_RI also needs to be checked on 8xx. > Only booke and 40x doesn't have MSR_RI. Reviewed-by: Nicholas Piggin ... >=20 > Signed-off-by: Christophe Leroy > --- > v5: Also in interrupt exit prepare > --- > arch/powerpc/kernel/interrupt.c | 7 ++++--- > 1 file changed, 4 insertions(+), 3 deletions(-) >=20 > diff --git a/arch/powerpc/kernel/interrupt.c b/arch/powerpc/kernel/interr= upt.c > index 1a2dec49f811..107ec39f05cb 100644 > --- a/arch/powerpc/kernel/interrupt.c > +++ b/arch/powerpc/kernel/interrupt.c > @@ -39,7 +39,7 @@ notrace long system_call_exception(long r3, long r4, lo= ng r5, > =20 > trace_hardirqs_off(); /* finish reconciling */ > =20 > - if (IS_ENABLED(CONFIG_PPC_BOOK3S)) > + if (!IS_ENABLED(CONFIG_BOOKE) && !IS_ENABLED(CONFIG_40x)) > BUG_ON(!(regs->msr & MSR_RI)); > BUG_ON(!(regs->msr & MSR_PR)); > BUG_ON(!FULL_REGS(regs)); > @@ -338,7 +338,7 @@ notrace unsigned long interrupt_exit_user_prepare(str= uct pt_regs *regs, unsigned > unsigned long flags; > unsigned long ret =3D 0; > =20 > - if (IS_ENABLED(CONFIG_PPC_BOOK3S)) > + if (!IS_ENABLED(CONFIG_BOOKE) && !IS_ENABLED(CONFIG_40x)) > BUG_ON(!(regs->msr & MSR_RI)); > BUG_ON(!(regs->msr & MSR_PR)); > BUG_ON(!FULL_REGS(regs)); > @@ -436,7 +436,8 @@ notrace unsigned long interrupt_exit_kernel_prepare(s= truct pt_regs *regs, unsign > unsigned long amr; > #endif > =20 > - if (IS_ENABLED(CONFIG_PPC_BOOK3S) && unlikely(!(regs->msr & MSR_RI))) > + if (!IS_ENABLED(CONFIG_BOOKE) && !IS_ENABLED(CONFIG_40x) && > + unlikely(!(regs->msr & MSR_RI))) > unrecoverable_exception(regs); > BUG_ON(regs->msr & MSR_PR); > BUG_ON(!FULL_REGS(regs)); > --=20 > 2.25.0 >=20 >=20