From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7B59E14A4E2; Tue, 20 Feb 2024 21:00:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708462854; cv=none; b=h0RWYrHs4o5supkmzH/vsc7X07pt5J+T0XuLwvOJQpp3vDiufwfzm+O59KwES35VPCT/44coeJ374psnBu2+lTHCQt8TGbVPmpuAm3CL5ZQ8qy07jqr5KI/jTtdxBYza08CvGuRqItYKL+JG9lfJr4mf5gY2xZidpPb08xdddPk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708462854; c=relaxed/simple; bh=ErR+YrrDfnJ8A1ddpsbi5FiSrXc2AeYA3lJQPUYaTtU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=lGjDVPAh4hmcK2TRncv1w2Cn8e276nca2jeK8i07/F1egGZ3dbym38tzBFnodpJdr+7R+vEVUsm2nbv1sLT7yU8ni/DSxcB5Lvg6eZpdw3H6n02wc6Qhj3M067ibqEy+i2kgvG3DFBv68xJPu5CYuiQzCtummUDXoO5aUje9A0Q= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=y7r9+UH2; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="y7r9+UH2" Received: by smtp.kernel.org (Postfix) with ESMTPSA id AB365C433C7; Tue, 20 Feb 2024 21:00:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1708462854; bh=ErR+YrrDfnJ8A1ddpsbi5FiSrXc2AeYA3lJQPUYaTtU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=y7r9+UH2y7eIaYqXnLUqxnQ9y3YFVLzY4yJgIgJ1ZL0R3PNNkAZ+onQNIz3GcOtHH pLO2aQ5/08ITwLZ+BoFapSnCB/bIcf4YA9Vt1Kw14vwMHCUaMQP5k4nHOP6bUVzpT9 7HhagqZfpURPlqdIyjML9eBcmZm4wYPNOWvx7CVI= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Matthias Schiffer , Christophe Leroy , Michael Ellerman , Sasha Levin Subject: [PATCH 6.1 057/197] powerpc/6xx: set High BAT Enable flag on G2_LE cores Date: Tue, 20 Feb 2024 21:50:16 +0100 Message-ID: <20240220204842.785276426@linuxfoundation.org> X-Mailer: git-send-email 2.43.2 In-Reply-To: <20240220204841.073267068@linuxfoundation.org> References: <20240220204841.073267068@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Matthias Schiffer [ Upstream commit a038a3ff8c6582404834852c043dadc73a5b68b4 ] MMU_FTR_USE_HIGH_BATS is set for G2_LE cores and derivatives like e300cX, but the high BATs need to be enabled in HID2 to work. Add register definitions and add the needed setup to __setup_cpu_603. This fixes boot on CPUs like the MPC5200B with STRICT_KERNEL_RWX enabled on systems where the flag has not been set by the bootloader already. Fixes: e4d6654ebe6e ("powerpc/mm/32s: rework mmu_mapin_ram()") Signed-off-by: Matthias Schiffer Reviewed-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://msgid.link/20240124103838.43675-1-matthias.schiffer@ew.tq-group.com Signed-off-by: Sasha Levin --- arch/powerpc/include/asm/reg.h | 2 ++ arch/powerpc/kernel/cpu_setup_6xx.S | 20 +++++++++++++++++++- 2 files changed, 21 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h index 8fda87af2fa5..6c0ab745f0c8 100644 --- a/arch/powerpc/include/asm/reg.h +++ b/arch/powerpc/include/asm/reg.h @@ -608,6 +608,8 @@ #endif #define SPRN_HID2 0x3F8 /* Hardware Implementation Register 2 */ #define SPRN_HID2_GEKKO 0x398 /* Gekko HID2 Register */ +#define SPRN_HID2_G2_LE 0x3F3 /* G2_LE HID2 Register */ +#define HID2_G2_LE_HBE (1<<18) /* High BAT Enable (G2_LE) */ #define SPRN_IABR 0x3F2 /* Instruction Address Breakpoint Register */ #define SPRN_IABR2 0x3FA /* 83xx */ #define SPRN_IBCR 0x135 /* 83xx Insn Breakpoint Control Reg */ diff --git a/arch/powerpc/kernel/cpu_setup_6xx.S b/arch/powerpc/kernel/cpu_setup_6xx.S index f8b5ff64b604..6cbad50c71f6 100644 --- a/arch/powerpc/kernel/cpu_setup_6xx.S +++ b/arch/powerpc/kernel/cpu_setup_6xx.S @@ -24,6 +24,15 @@ BEGIN_FTR_SECTION bl __init_fpu_registers END_FTR_SECTION_IFCLR(CPU_FTR_FPU_UNAVAILABLE) bl setup_common_caches + + /* + * This assumes that all cores using __setup_cpu_603 with + * MMU_FTR_USE_HIGH_BATS are G2_LE compatible + */ +BEGIN_MMU_FTR_SECTION + bl setup_g2_le_hid2 +END_MMU_FTR_SECTION_IFSET(MMU_FTR_USE_HIGH_BATS) + mtlr r5 blr _GLOBAL(__setup_cpu_604) @@ -111,6 +120,16 @@ setup_604_hid0: isync blr +/* Enable high BATs for G2_LE and derivatives like e300cX */ +SYM_FUNC_START_LOCAL(setup_g2_le_hid2) + mfspr r11,SPRN_HID2_G2_LE + oris r11,r11,HID2_G2_LE_HBE@h + mtspr SPRN_HID2_G2_LE,r11 + sync + isync + blr +SYM_FUNC_END(setup_g2_le_hid2) + /* 7400 <= rev 2.7 and 7410 rev = 1.0 suffer from some * erratas we work around here. * Moto MPC710CE.pdf describes them, those are errata @@ -485,4 +504,3 @@ _GLOBAL(__restore_cpu_setup) mtcr r7 blr _ASM_NOKPROBE_SYMBOL(__restore_cpu_setup) - -- 2.43.0