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Mon, 05 Aug 2019 20:08:08 -0700 (PDT) From: Luis Araneda To: linux@armlinux.org.uk, michal.simek@xilinx.com Cc: stable@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Luis Araneda Subject: [PATCH 1/2] ARM: zynq: support smp in thumb mode Date: Mon, 5 Aug 2019 23:07:17 -0400 Message-Id: <20190806030718.29048-2-luaraneda@gmail.com> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190806030718.29048-1-luaraneda@gmail.com> References: <20190806030718.29048-1-luaraneda@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add .arm directive to headsmp.S to ensure that the CPU starts in 32-bit ARM mode and the correct code size is copied on smp bring-up Additionally, start secondary CPUs on secondary_startup_arm to automatically switch from ARM to thumb on a thumb kernel Suggested-by: Michal Simek Signed-off-by: Luis Araneda --- arch/arm/mach-zynq/headsmp.S | 2 ++ arch/arm/mach-zynq/platsmp.c | 2 +- 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/arm/mach-zynq/headsmp.S b/arch/arm/mach-zynq/headsmp.S index ab85003cf9ad..3449e0d1f990 100644 --- a/arch/arm/mach-zynq/headsmp.S +++ b/arch/arm/mach-zynq/headsmp.S @@ -7,6 +7,8 @@ #include #include + .arm + ENTRY(zynq_secondary_trampoline) ARM_BE8(setend be) @ ensure we are in BE8 mode ldr r0, zynq_secondary_trampoline_jump diff --git a/arch/arm/mach-zynq/platsmp.c b/arch/arm/mach-zynq/platsmp.c index a7cfe07156f4..38728badabd4 100644 --- a/arch/arm/mach-zynq/platsmp.c +++ b/arch/arm/mach-zynq/platsmp.c @@ -81,7 +81,7 @@ EXPORT_SYMBOL(zynq_cpun_start); static int zynq_boot_secondary(unsigned int cpu, struct task_struct *idle) { - return zynq_cpun_start(__pa_symbol(secondary_startup), cpu); + return zynq_cpun_start(__pa_symbol(secondary_startup_arm), cpu); } /* -- 2.22.0