From patchwork Thu Aug 22 15:11:04 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Joey Gouly X-Patchwork-Id: 13773855 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 4EB6AC52D7C for ; Thu, 22 Aug 2024 15:53:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=YpUVqN2yD82ZzjqMsW13TV0m9gqSc3sr7jdaCm+yJjE=; b=tJJltDwX49Vi5FfQtsI+SHrkPr cH4VPEdIFTpun9JrIpY7cW7qvd7AIX52HmSRDjHsKqGprlnROOCyO8rx7D04FBBJng+QSzqLmS3nk EZa6BwlNWvHM2dhUYkzu/77OZon75bCTItf9fGafGJ9UB0sEE+A2uqXqWvVgHy1KgVItExA0+ShjQ BTUqRj+MS66+7JqoHCvic51HVdFWLGjRRvj3Ys8ZYRA3FfuQhAlzzCEzfUCmXOqGvi2zJsE9wZMGA SJINHE2xYuKYc9t2M7dmDzuv80VpLao5204aoOmNAlOQh+ZdHajTb5n4H4sEPJxatiaeuilEc50Xf YHZTYNBA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1shA7M-0000000DQ0h-2Kxa; Thu, 22 Aug 2024 15:52:56 +0000 Received: from desiato.infradead.org ([2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sh9Uh-0000000DIaF-0bLs for linux-arm-kernel@bombadil.infradead.org; Thu, 22 Aug 2024 15:12:59 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Transfer-Encoding:MIME-Version :References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=YpUVqN2yD82ZzjqMsW13TV0m9gqSc3sr7jdaCm+yJjE=; b=Gg+IBAB6TaeI5e2+IMW7OhabAK BemBkzuQ6rnu8+49/8a2QqYB5MjZOA1wBRlWkxRgeunvJ6E97U3L0vCFf1v8hvLE1wej9+q0Tpr7/ T6IW/M6UgXMzmA13lCuy6d6BPS0mRUjvUDAR37Bl0+O0/KlHUTtL5ZHyOZdB/4MW6E46aNeKpJMXV r3U2tzomYjmMajzXbPDtN49Bd8/0TREslrqWLKl2qNchpGtbQpPF68TvFRDAPwLYCFXTTp4JGZ2Te Y7S3N5yXw/k2lZ3Qqx72rF2x1XqjJxssZQNMlF3RwjJo2wDlpWAIWVMPL9xWLQ6C8x81tb7cgBkv5 WLBO89PQ==; Received: from foss.arm.com ([217.140.110.172]) by desiato.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sh9Ud-00000009yNU-2159 for linux-arm-kernel@lists.infradead.org; Thu, 22 Aug 2024 15:12:57 +0000 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 3AF6E1596; Thu, 22 Aug 2024 08:13:21 -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 1CD163F58B; Thu, 22 Aug 2024 08:12:50 -0700 (PDT) From: Joey Gouly To: linux-arm-kernel@lists.infradead.org Cc: nd@arm.com, akpm@linux-foundation.org, aneesh.kumar@kernel.org, aneesh.kumar@linux.ibm.com, anshuman.khandual@arm.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, skhan@linuxfoundation.org, szabolcs.nagy@arm.com, tglx@linutronix.de, will@kernel.org, x86@kernel.org, kvmarm@lists.linux.dev, linux-kselftest@vger.kernel.org Subject: [PATCH v5 21/30] arm64: enable POE and PIE to coexist Date: Thu, 22 Aug 2024 16:11:04 +0100 Message-Id: <20240822151113.1479789-22-joey.gouly@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240822151113.1479789-1-joey.gouly@arm.com> References: <20240822151113.1479789-1-joey.gouly@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240822_161255_933541_D65082F0 X-CRM114-Status: GOOD ( 10.70 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Permission Indirection Extension and Permission Overlay Extension can be enabled independently. When PIE is disabled and POE is enabled, the permissions set by POR_EL0 will be applied on top of the permissions set in the PTE. When both PIE and POE are enabled, the permissions set by POR_EL0 will be applied on top of the permissions set by the PIRE0_EL1 register. However PIRE0_EL1 has encodings that specifically enable and disable the overlay from applying. For example: 0001 Read, Overlay applied. 1000 Read, Overlay not applied. Switch to using the 'Overlay applied' encodings in PIRE0_EL1, so that PIE and POE can coexist. Signed-off-by: Joey Gouly Cc: Catalin Marinas Cc: Will Deacon Reviewed-by: Catalin Marinas --- arch/arm64/include/asm/pgtable-prot.h | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git arch/arm64/include/asm/pgtable-prot.h arch/arm64/include/asm/pgtable-prot.h index b11cfb9fdd37..2a11d0c10760 100644 --- arch/arm64/include/asm/pgtable-prot.h +++ arch/arm64/include/asm/pgtable-prot.h @@ -154,10 +154,10 @@ static inline bool __pure lpa2_is_enabled(void) #define PIE_E0 ( \ PIRx_ELx_PERM(pte_pi_index(_PAGE_EXECONLY), PIE_X_O) | \ - PIRx_ELx_PERM(pte_pi_index(_PAGE_READONLY_EXEC), PIE_RX) | \ - PIRx_ELx_PERM(pte_pi_index(_PAGE_SHARED_EXEC), PIE_RWX) | \ - PIRx_ELx_PERM(pte_pi_index(_PAGE_READONLY), PIE_R) | \ - PIRx_ELx_PERM(pte_pi_index(_PAGE_SHARED), PIE_RW)) + PIRx_ELx_PERM(pte_pi_index(_PAGE_READONLY_EXEC), PIE_RX_O) | \ + PIRx_ELx_PERM(pte_pi_index(_PAGE_SHARED_EXEC), PIE_RWX_O) | \ + PIRx_ELx_PERM(pte_pi_index(_PAGE_READONLY), PIE_R_O) | \ + PIRx_ELx_PERM(pte_pi_index(_PAGE_SHARED), PIE_RW_O)) #define PIE_E1 ( \ PIRx_ELx_PERM(pte_pi_index(_PAGE_EXECONLY), PIE_NONE_O) | \