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Tue, 19 Nov 2024 14:27:40 +1100 (AEDT) From: Michael Ellerman To: Christophe Leroy , linuxppc-dev@lists.ozlabs.org Cc: linux-kernel@vger.kernel.org, geert@linux-m68k.org, arnd@arndb.de Subject: Re: [RFC PATCH 02/10] powerpc/chrp: Remove various dead code In-Reply-To: References: <20241114131114.602234-1-mpe@ellerman.id.au> <20241114131114.602234-2-mpe@ellerman.id.au> Date: Tue, 19 Nov 2024 14:27:43 +1100 Message-ID: <874j43j428.fsf@mpe.ellerman.id.au> X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Christophe Leroy writes: > Le 14/11/2024 =C3=A0 14:11, Michael Ellerman a =C3=A9crit=C2=A0: >> Remove various bits of code that are dead now that PPC_CHRP has been >> removed. >>=20 >> Signed-off-by: Michael Ellerman >> --- >> arch/powerpc/Kconfig | 5 +-- >> arch/powerpc/boot/Makefile | 1 - >> arch/powerpc/include/asm/processor.h | 6 --- >> arch/powerpc/kernel/head_book3s_32.S | 12 ------ >> arch/powerpc/kernel/pci_32.c | 2 +- >> arch/powerpc/kernel/prom_init.c | 56 ---------------------------- >> 6 files changed, 3 insertions(+), 79 deletions(-) >>=20 > >> diff --git a/arch/powerpc/kernel/head_book3s_32.S b/arch/powerpc/kernel/= head_book3s_32.S >> index cb2bca76be53..c6e297fd36e2 100644 >> --- a/arch/powerpc/kernel/head_book3s_32.S >> +++ b/arch/powerpc/kernel/head_book3s_32.S >> @@ -256,20 +256,8 @@ __secondary_hold_acknowledge: >> */ >> START_EXCEPTION(INTERRUPT_MACHINE_CHECK, MachineCheck) >> EXCEPTION_PROLOG_0 >> -#ifdef CONFIG_PPC_CHRP >> - mtspr SPRN_SPRG_SCRATCH2,r1 >> - mfspr r1, SPRN_SPRG_THREAD >> - lwz r1, RTAS_SP(r1) >> - cmpwi cr1, r1, 0 >> - bne cr1, 7f >> - mfspr r1, SPRN_SPRG_SCRATCH2 >> -#endif /* CONFIG_PPC_CHRP */ >> EXCEPTION_PROLOG_1 >> 7: EXCEPTION_PROLOG_2 0x200 MachineCheck >> -#ifdef CONFIG_PPC_CHRP >> - beq cr1, 1f >> - twi 31, 0, 0 >> -#endif >> 1: prepare_transfer_to_handler >> bl machine_check_exception >> b interrupt_return > > Then it becomes a standard exception handler that can be set up with > > EXCEPTION(INTERRUPT_MACHINE_CHECK, MachineCheck, machine_check_exception) Ack. And I checked the asm output is identical. > And the comment from paulus voids. Thanks. cheers