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a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1755248141; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=40L0rT1TMmMu3khvygOHsnP91kI7tFfWaXjrpg8NnXY=; b=uUMLf8OrTZ1DCCd7RkcQyoLhMg1tNfCeUwvLB+WTFgxQdAu/ZI/0R6rbaOm8hWHFY+5MoE 5f/l0MRpyCYstx2yJR2dPnuDaW5xMacPrdWD0hT4ertZPdf8XjY6NtH5xjF9v+JSJwimrv KUcup48F6+jOV/eUixTtZq9lxs10ki4= 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 C86171E5E; Fri, 15 Aug 2025 01:55:32 -0700 (PDT) Received: from e123572-lin.arm.com (e123572-lin.cambridge.arm.com [10.1.194.54]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 703713F63F; Fri, 15 Aug 2025 01:55:36 -0700 (PDT) From: Kevin Brodsky To: linux-hardening@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Kevin Brodsky , Andrew Morton , Andy Lutomirski , Catalin Marinas , Dave Hansen , David Hildenbrand , Ira Weiny , Jann Horn , Jeff Xu , Joey Gouly , Kees Cook , Linus Walleij , Lorenzo Stoakes , Marc Zyngier , Mark Brown , Matthew Wilcox , Maxwell Bland , "Mike Rapoport (IBM)" , Peter Zijlstra , Pierre Langlois , Quentin Perret , Rick Edgecombe , Ryan Roberts , Thomas Gleixner , Vlastimil Babka , Will Deacon , linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, x86@kernel.org Subject: [RFC PATCH v5 03/18] arm64: mm: Enable overlays for all EL1 indirect permissions Date: Fri, 15 Aug 2025 09:54:57 +0100 Message-ID: <20250815085512.2182322-4-kevin.brodsky@arm.com> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20250815085512.2182322-1-kevin.brodsky@arm.com> References: <20250815085512.2182322-1-kevin.brodsky@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: B548E40002 X-Stat-Signature: xaxmkmfpzqsgog9ptmhcq4gkkc1yy6hm X-Rspam-User: X-Rspamd-Server: rspam06 X-HE-Tag: 1755248141-202310 X-HE-Meta: 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 jzWqOQtf iAJ37sjsFen3PCvKeHdG+6sMFZWwmra4NpMUgaj6XwxioOLPBuQlQgGzaH0KLS/J4DjsKuWIoKRGI4p2Xg44xGnLdXoTKbdObo15pi022jNezfLtsz1TxygLU5G7fHtllK/W0Pv3k0pFqBj0gqPplL0fhWQ== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: In preparation of using POE inside the kernel, enable "Overlay applied" for all stage 1 base permissions in PIR_EL1. This ensures that the permissions set in POR_EL1 affect all kernel mappings. Signed-off-by: Kevin Brodsky --- arch/arm64/include/asm/pgtable-prot.h | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/arch/arm64/include/asm/pgtable-prot.h b/arch/arm64/include/asm/pgtable-prot.h index 85dceb1c66f4..0ab4ac214b06 100644 --- a/arch/arm64/include/asm/pgtable-prot.h +++ b/arch/arm64/include/asm/pgtable-prot.h @@ -180,13 +180,13 @@ static inline bool __pure lpa2_is_enabled(void) PIRx_ELx_PERM_PREP(pte_pi_index(_PAGE_GCS), PIE_NONE_O) | \ PIRx_ELx_PERM_PREP(pte_pi_index(_PAGE_GCS_RO), PIE_NONE_O) | \ PIRx_ELx_PERM_PREP(pte_pi_index(_PAGE_EXECONLY), PIE_NONE_O) | \ - PIRx_ELx_PERM_PREP(pte_pi_index(_PAGE_READONLY_EXEC), PIE_R) | \ - PIRx_ELx_PERM_PREP(pte_pi_index(_PAGE_SHARED_EXEC), PIE_RW) | \ - PIRx_ELx_PERM_PREP(pte_pi_index(_PAGE_READONLY), PIE_R) | \ - PIRx_ELx_PERM_PREP(pte_pi_index(_PAGE_SHARED), PIE_RW) | \ - PIRx_ELx_PERM_PREP(pte_pi_index(_PAGE_KERNEL_ROX), PIE_RX) | \ - PIRx_ELx_PERM_PREP(pte_pi_index(_PAGE_KERNEL_EXEC), PIE_RWX) | \ - PIRx_ELx_PERM_PREP(pte_pi_index(_PAGE_KERNEL_RO), PIE_R) | \ - PIRx_ELx_PERM_PREP(pte_pi_index(_PAGE_KERNEL), PIE_RW)) + PIRx_ELx_PERM_PREP(pte_pi_index(_PAGE_READONLY_EXEC), PIE_R_O) | \ + PIRx_ELx_PERM_PREP(pte_pi_index(_PAGE_SHARED_EXEC), PIE_RW_O) | \ + PIRx_ELx_PERM_PREP(pte_pi_index(_PAGE_READONLY), PIE_R_O) | \ + PIRx_ELx_PERM_PREP(pte_pi_index(_PAGE_SHARED), PIE_RW_O) | \ + PIRx_ELx_PERM_PREP(pte_pi_index(_PAGE_KERNEL_ROX), PIE_RX_O) | \ + PIRx_ELx_PERM_PREP(pte_pi_index(_PAGE_KERNEL_EXEC), PIE_RWX_O) | \ + PIRx_ELx_PERM_PREP(pte_pi_index(_PAGE_KERNEL_RO), PIE_R_O) | \ + PIRx_ELx_PERM_PREP(pte_pi_index(_PAGE_KERNEL), PIE_RW_O)) #endif /* __ASM_PGTABLE_PROT_H */ -- 2.47.0