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Wed, 08 Oct 2025 01:44:56 -0700 (PDT) Received: from hsinchu16.internal.sifive.com ([210.176.154.34]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-28ecaefd60fsm51327255ad.93.2025.10.08.01.44.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 08 Oct 2025 01:44:55 -0700 (PDT) From: Yu-Chien Peter Lin To: opensbi@lists.infradead.org Cc: zong.li@sifive.com, greentime.hu@sifive.com, wxjstz@126.com, alvinga@andestech.com, anup@brainfault.org, Yu-Chien Peter Lin Subject: [PATCH v2 3/8] lib: sbi_domain: print unsupported SmePMP permissions Date: Wed, 8 Oct 2025 16:44:39 +0800 Message-ID: <20251008084444.3525615-4-peter.lin@sifive.com> X-Mailer: git-send-email 2.48.0 In-Reply-To: <20251008084444.3525615-1-peter.lin@sifive.com> References: <20251008084444.3525615-1-peter.lin@sifive.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20251008_014457_628893_342B6865 X-CRM114-Status: UNSURE ( 9.64 ) X-CRM114-Notice: Please train this message. X-BeenThere: opensbi@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "opensbi" Errors-To: opensbi-bounces+opensbi=archiver.kernel.org@lists.infradead.org The reg->flag is encoded with 6 bits to specify RWX permissions for M-mode and S-/U-mode. However, only 16 of the possible encodings are valid on SmePMP. Add a warning message when an unsupported permission encoding is detected. Signed-off-by: Yu-Chien Peter Lin --- lib/sbi/sbi_domain.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/lib/sbi/sbi_domain.c b/lib/sbi/sbi_domain.c index 89250d4c..798e68b3 100644 --- a/lib/sbi/sbi_domain.c +++ b/lib/sbi/sbi_domain.c @@ -125,6 +125,7 @@ void sbi_domain_memregion_init(unsigned long addr, unsigned int sbi_domain_get_smepmp_flags(struct sbi_domain_memregion *reg) { unsigned int pmp_flags = 0; + unsigned long rstart, rend; if ((reg->flags & SBI_DOMAIN_MEMREGION_ACCESS_MASK) == 0) { /* @@ -185,6 +186,13 @@ unsigned int sbi_domain_get_smepmp_flags(struct sbi_domain_memregion *reg) pmp_flags |= PMP_W; if (reg->flags & SBI_DOMAIN_MEMREGION_SU_EXECUTABLE) pmp_flags |= PMP_X; + } else { + rstart = reg->base; + rend = (reg->order < __riscv_xlen) ? + rstart + ((1UL << reg->order) - 1) : -1UL; + sbi_printf("%s: Unsupported Smepmp permissions " + "on region 0x%" PRILX "-0x%" PRILX "\n", + __func__, rstart, rend); } return pmp_flags; -- 2.48.0 -- opensbi mailing list opensbi@lists.infradead.org http://lists.infradead.org/mailman/listinfo/opensbi