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[60.241.27.127]) by smtp.gmail.com with ESMTPSA id f5sm8681390pjp.37.2021.05.21.04.44.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 21 May 2021 04:44:45 -0700 (PDT) From: Nicholas Piggin To: linuxppc-dev@lists.ozlabs.org Subject: [PATCH v2 06/11] powerpc/64s: system call avoid setting MSR[RI] until we set MSR[EE] Date: Fri, 21 May 2021 21:44:17 +1000 Message-Id: <20210521114422.3179350-7-npiggin@gmail.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20210521114422.3179350-1-npiggin@gmail.com> References: <20210521114422.3179350-1-npiggin@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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: Nicholas Piggin Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" This extends the MSR[RI]=0 window a little further into the system call in order to pair RI and EE enabling with a single mtmsrd. Signed-off-by: Nicholas Piggin --- arch/powerpc/kernel/exceptions-64s.S | 2 -- arch/powerpc/kernel/interrupt_64.S | 4 ++-- 2 files changed, 2 insertions(+), 4 deletions(-) diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S index a2ae14d0600e..b6e1c46c97d0 100644 --- a/arch/powerpc/kernel/exceptions-64s.S +++ b/arch/powerpc/kernel/exceptions-64s.S @@ -1942,8 +1942,6 @@ END_FTR_SECTION_IFSET(CPU_FTR_REAL_LE) mtctr r10 bctr .else - li r10,MSR_RI - mtmsrd r10,1 /* Set RI (EE=0) */ #ifdef CONFIG_RELOCATABLE __LOAD_HANDLER(r10, system_call_common) mtctr r10 diff --git a/arch/powerpc/kernel/interrupt_64.S b/arch/powerpc/kernel/interrupt_64.S index 83826775d239..3038c831fc5f 100644 --- a/arch/powerpc/kernel/interrupt_64.S +++ b/arch/powerpc/kernel/interrupt_64.S @@ -284,9 +284,9 @@ END_BTB_FLUSH_SECTION * trace_hardirqs_off(). */ li r11,IRQS_ALL_DISABLED - li r12,PACA_IRQ_HARD_DIS + li r12,-1 /* Set MSR_EE and MSR_RI */ stb r11,PACAIRQSOFTMASK(r13) - stb r12,PACAIRQHAPPENED(r13) + mtmsrd r12,1 /* Calling convention has r9 = orig r0, r10 = regs */ mr r9,r0 -- 2.23.0