From b6ecc63c569bb88c0fcadf79fb92bf4b88aefea8 Mon Sep 17 00:00:00 2001 From: Weiwei Li Date: Fri, 4 Feb 2022 10:26:55 +0800 Subject: [PATCH] target/riscv: add PTE_A/PTE_D/PTE_U bits check for inner PTE For non-leaf PTEs, the D, A, and U bits are reserved for future standard use. Signed-off-by: Weiwei Li Signed-off-by: Junqiang Wang Reviewed-by: Anup Patel Reviewed-by: Alistair Francis Message-Id: <20220204022658.18097-3-liweiwei@iscas.ac.cn> Signed-off-by: Alistair Francis --- target/riscv/cpu_helper.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/target/riscv/cpu_helper.c b/target/riscv/cpu_helper.c index 7df4569526..25ebc76725 100644 --- a/target/riscv/cpu_helper.c +++ b/target/riscv/cpu_helper.c @@ -937,6 +937,9 @@ restart: return TRANSLATE_FAIL; } else if (!(pte & (PTE_R | PTE_W | PTE_X))) { /* Inner PTE, continue walking */ + if (pte & (PTE_D | PTE_A | PTE_U)) { + return TRANSLATE_FAIL; + } base = ppn << PGSHIFT; } else if ((pte & (PTE_R | PTE_W | PTE_X)) == PTE_W) { /* Reserved leaf PTE flags: PTE_W */ -- 2.11.0