From: Himanshu Chauhan Date: Wed, 18 Jan 2023 17:07:52 +0530 Subject: [PATCH v2 0/5] Split RX and RW regions for separate pmp entries Message-ID: <20230118113757.46282-1-hchauhan@ventanamicro.com> List-Id: To: opensbi@lists.infradead.org MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit This is second installment of the patch series sent earlier with the subject: Split region permissions into M-mode and SU-mode. The version 2 was recently posted, for which below is the link: http://lists.infradead.org/pipermail/opensbi/2023-January/004127.html This patch series splits the RX (text and read-only data) and RW data regions so that each can have its independent pmp entries with correct permissions. The linker script provides a new symbol _fw_rw_offset that marks the beginning of the RW section. It also ensures that the split is a power-of-2 as required by pmp. This lays ground work for enforcing the permissions from M-mode. New in v2: * Added a check if fw_rw_offset is a power of w * Added a check if fw_start and fw_rw_offset are aligned Himanshu Chauhan (5): firmware: Split RO/RX and RW sections firmware: Move dynsym and reladyn sections to RX section firmware: Add RW section offset in scratch lib: sbi: Print the RW section offset Add two entries: firmware/fw_base.S | 5 +++++ firmware/fw_base.ldS | 43 ++++++++++++++++++++++++--------------- include/sbi/sbi_scratch.h | 24 +++++++++++++--------- lib/sbi/sbi_domain.c | 23 +++++++++++++++++++-- lib/sbi/sbi_init.c | 1 + 5 files changed, 68 insertions(+), 28 deletions(-) -- 2.39.0