From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 98F90153BCB for ; Fri, 3 May 2024 13:02:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714741356; cv=none; b=jzT0znOfxUtA3/WiMEMg7oewY0ERIGp6j+RWtRq17Xwyc2xjyLT1rr99z+VBWBTfw7TB9vkCkXVW5PBK8rLQ4FQMwEY+1VO+r0HSaOmNfOdslZTUNgsThO3lcD7EfouO0Br85WY4dVfVgA8ZwTmsXyz70L9qyRRnKSQmqinvNDI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714741356; c=relaxed/simple; bh=o0dlkbVRikWxjrVzFMMU95GM+kD8+vmsleowLTPabfk=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=O4uN/KbemSJQJJziUGV6TXapUXnKbKKaHPXV49QayBURLY5hWGbV7LF+jpbFS79XtYtg50m88+RBq6aKyQcL4ZfO91zh/qqftbZgVk5ozWuaHkZAoEOH/CrvCkMmGdjBrFinwGJhdv6SVUvwb99Qwlw5Tk0/JzhZseB7XazIUFc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 7F63A1692; Fri, 3 May 2024 06:03:00 -0700 (PDT) Received: from e124191.cambridge.arm.com (e124191.cambridge.arm.com [10.1.197.45]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 2EC6C3F73F; Fri, 3 May 2024 06:02:32 -0700 (PDT) From: Joey Gouly To: linux-arm-kernel@lists.infradead.org Cc: akpm@linux-foundation.org, aneesh.kumar@kernel.org, aneesh.kumar@linux.ibm.com, bp@alien8.de, broonie@kernel.org, catalin.marinas@arm.com, christophe.leroy@csgroup.eu, dave.hansen@linux.intel.com, hpa@zytor.com, joey.gouly@arm.com, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, maz@kernel.org, mingo@redhat.com, mpe@ellerman.id.au, naveen.n.rao@linux.ibm.com, npiggin@gmail.com, oliver.upton@linux.dev, shuah@kernel.org, szabolcs.nagy@arm.com, tglx@linutronix.de, will@kernel.org, x86@kernel.org, kvmarm@lists.linux.dev Subject: [PATCH v4 12/29] arm64: add POIndex defines Date: Fri, 3 May 2024 14:01:30 +0100 Message-Id: <20240503130147.1154804-13-joey.gouly@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240503130147.1154804-1-joey.gouly@arm.com> References: <20240503130147.1154804-1-joey.gouly@arm.com> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The 3-bit POIndex is stored in the PTE at bits 60..62. Signed-off-by: Joey Gouly Cc: Catalin Marinas Cc: Will Deacon --- arch/arm64/include/asm/pgtable-hwdef.h | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/arch/arm64/include/asm/pgtable-hwdef.h b/arch/arm64/include/asm/pgtable-hwdef.h index ef207a0d4f0d..370a02922fe1 100644 --- a/arch/arm64/include/asm/pgtable-hwdef.h +++ b/arch/arm64/include/asm/pgtable-hwdef.h @@ -198,6 +198,16 @@ #define PTE_PI_IDX_2 53 /* PXN */ #define PTE_PI_IDX_3 54 /* UXN */ +/* + * POIndex[2:0] encoding (Permission Overlay Extension) + */ +#define PTE_PO_IDX_0 (_AT(pteval_t, 1) << 60) +#define PTE_PO_IDX_1 (_AT(pteval_t, 1) << 61) +#define PTE_PO_IDX_2 (_AT(pteval_t, 1) << 62) + +#define PTE_PO_IDX_MASK GENMASK_ULL(62, 60) + + /* * Memory Attribute override for Stage-2 (MemAttr[3:0]) */ -- 2.25.1