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Mon, 3 Feb 2025 02:19:49 -0800 (PST) From: Kevin Brodsky To: linux-hardening@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Kevin Brodsky , Andrew Morton , Mark Brown , Catalin Marinas , Dave Hansen , Jann Horn , Jeff Xu , Joey Gouly , Kees Cook , Linus Walleij , Andy Lutomirski , Marc Zyngier , Peter Zijlstra , Pierre Langlois , Quentin Perret , "Mike Rapoport (IBM)" , Ryan Roberts , Thomas Gleixner , Will Deacon , Matthew Wilcox , Qi Zheng , linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, x86@kernel.org Subject: [RFC PATCH v3 03/15] arm64: mm: Enable overlays for all EL1 indirect permissions Date: Mon, 3 Feb 2025 10:18:27 +0000 Message-ID: <20250203101839.1223008-4-kevin.brodsky@arm.com> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20250203101839.1223008-1-kevin.brodsky@arm.com> References: <20250203101839.1223008-1-kevin.brodsky@arm.com> MIME-Version: 1.0 X-Rspamd-Queue-Id: 5CA4E1C0007 X-Rspam-User: X-Rspamd-Server: rspam11 X-Stat-Signature: eop718qt5wibns3tfn1kjqxtxrxe34ry X-HE-Tag: 1738577994-126575 X-HE-Meta: U2FsdGVkX18hdco4RAqAFyoI9jqrJudROcVAqnqh63oQJ+lGNYsugQntDYwdBGimD7fMbdA4GjYpM1gX6Jd57PufIfK5by/j0xABKTEVkB79DtGBx24QArZSkNinmLfR+AelS6E9reMJWHSgr8WBI7KmyV7ccqiGT4+/C/wNIEqVXiNmZg57r2IU7v6hepEmqiq3kmxrSfbLkQwScw03xF0dl0R9oN+i+EidlbywewGbRknWF0mz00HsxgdfNItmvI6YumwaP6yh9llXJO0qMsW0c16TagK/AQe2V7e7CqGIOzbrIoS8YGEexPQ9xc19IehozjubHxvGz+CZf/hxb7WEg3EZPWTSJVT/8Mq2u6sTENih8gwaZ5FuvRSoUMdllewYbxuTYhCy71e/O/KrWg6mCkjDIiOwzV3J31EqUwS424xY1xLpi6zT2qVb08bN87A7VAtBTtADLW95ZiG7W3DncizrhpK97/LS5fis9P/P/5NeHwu2bNZ09Dn1jn7Q5C5UwpjLMiHuw/mQzGCW1qEMPPr6svgUTZ+6isflTRdvKzd3ztPqwT74lOexTRfARURRYEnjB9DWeahtSSyYz/aU5lWKvEW8RLttQUrqLoy+lEq+vXFlEnZlBXE3Fidekd6BYyiU1Pvb7CZ6PPNnR49/UE6mg5vBUcP3cQnby0xG9LaAAnwrYIue3YtK9ynLXd/yWmqcvgtybHl57GiSo8e9PEzaqQRlH9xVOO68dDvKG+4Q99pqtrqcPEqLAmrHpSrhu1bh1fCoStGtHl9EeQTQhCsnCmYG/WTlmK0VmmDkiAbUnSzUwJiFWlD73nRAmJKgs1LL4/xQ/3T5SZPwpn36UQHs/4gkqfD9aENSYMSce99PG+Q2WeJiRnMl7kNANBg9vt6U4D0PdO53mPMc7BS7JHG58wSI9fXNNmzErKGyGlbp3Jrd9OYFVj1wJIWPSOaUQ/l/2jWvjaot/T6 rzdJNUGw Yp7CuQsT8Ni1wHuM03LdXvIJnRdhP8plx8cU4IztV085AcPzJYmTQ2NBaE0XmrUBY/QgBMsyQSqjmlPyMGFuy8k17VWVwSO/Rb/iaiA9e+En8DlMk3cIpxP6iQg0HKkLN1iunOsbR5ZQrImbJ6hatoMqeDQ== 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 a95f1f77bb39..7c0c30460900 100644 --- a/arch/arm64/include/asm/pgtable-prot.h +++ b/arch/arm64/include/asm/pgtable-prot.h @@ -181,13 +181,13 @@ static inline bool __pure lpa2_is_enabled(void) PIRx_ELx_PERM(pte_pi_index(_PAGE_GCS), PIE_NONE_O) | \ PIRx_ELx_PERM(pte_pi_index(_PAGE_GCS_RO), PIE_NONE_O) | \ PIRx_ELx_PERM(pte_pi_index(_PAGE_EXECONLY), PIE_NONE_O) | \ - PIRx_ELx_PERM(pte_pi_index(_PAGE_READONLY_EXEC), PIE_R) | \ - PIRx_ELx_PERM(pte_pi_index(_PAGE_SHARED_EXEC), PIE_RW) | \ - 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_KERNEL_ROX), PIE_RX) | \ - PIRx_ELx_PERM(pte_pi_index(_PAGE_KERNEL_EXEC), PIE_RWX) | \ - PIRx_ELx_PERM(pte_pi_index(_PAGE_KERNEL_RO), PIE_R) | \ - PIRx_ELx_PERM(pte_pi_index(_PAGE_KERNEL), PIE_RW)) + PIRx_ELx_PERM(pte_pi_index(_PAGE_READONLY_EXEC), PIE_R_O) | \ + PIRx_ELx_PERM(pte_pi_index(_PAGE_SHARED_EXEC), PIE_RW_O) | \ + PIRx_ELx_PERM(pte_pi_index(_PAGE_READONLY), PIE_R_O) | \ + PIRx_ELx_PERM(pte_pi_index(_PAGE_SHARED), PIE_RW_O) | \ + PIRx_ELx_PERM(pte_pi_index(_PAGE_KERNEL_ROX), PIE_RX_O) | \ + PIRx_ELx_PERM(pte_pi_index(_PAGE_KERNEL_EXEC), PIE_RWX_O) | \ + PIRx_ELx_PERM(pte_pi_index(_PAGE_KERNEL_RO), PIE_R_O) | \ + PIRx_ELx_PERM(pte_pi_index(_PAGE_KERNEL), PIE_RW_O)) #endif /* __ASM_PGTABLE_PROT_H */