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[PATCH v3 6/8] target/riscv: Add a config option for ePMP
From: |
Alistair Francis |
Subject: |
[PATCH v3 6/8] target/riscv: Add a config option for ePMP |
Date: |
Tue, 13 Apr 2021 12:42:44 +1000 |
From: Hou Weiying <weiying_hou@outlook.com>
Add a config option to enable experimental support for ePMP. This
is disabled by default and can be enabled with 'x-epmp=true'.
Signed-off-by: Hongzheng-Li <Ethan.Lee.QNL@gmail.com>
Signed-off-by: Hou Weiying <weiying_hou@outlook.com>
Signed-off-by: Myriad-Dreamin <camiyoru@gmail.com>
Message-Id:
<SG2PR02MB263458D195A60A57C05EBE9993450@SG2PR02MB2634.apcprd02.prod.outlook.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
---
target/riscv/cpu.h | 1 +
target/riscv/cpu.c | 10 ++++++++++
2 files changed, 11 insertions(+)
diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
index 83b315e0b2..add734bbbd 100644
--- a/target/riscv/cpu.h
+++ b/target/riscv/cpu.h
@@ -304,6 +304,7 @@ struct RISCVCPU {
uint16_t elen;
bool mmu;
bool pmp;
+ bool epmp;
uint64_t resetvec;
} cfg;
};
diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index e530df9385..66787d019c 100644
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -412,6 +412,14 @@ static void riscv_cpu_realize(DeviceState *dev, Error
**errp)
if (cpu->cfg.pmp) {
set_feature(env, RISCV_FEATURE_PMP);
+
+ /*
+ * Enhanced PMP should only be available
+ * on harts with PMP support
+ */
+ if (cpu->cfg.epmp) {
+ set_feature(env, RISCV_FEATURE_EPMP);
+ }
}
set_resetvec(env, cpu->cfg.resetvec);
@@ -554,6 +562,8 @@ static Property riscv_cpu_properties[] = {
DEFINE_PROP_UINT16("elen", RISCVCPU, cfg.elen, 64),
DEFINE_PROP_BOOL("mmu", RISCVCPU, cfg.mmu, true),
DEFINE_PROP_BOOL("pmp", RISCVCPU, cfg.pmp, true),
+ DEFINE_PROP_BOOL("x-epmp", RISCVCPU, cfg.epmp, false),
+
DEFINE_PROP_UINT64("resetvec", RISCVCPU, cfg.resetvec, DEFAULT_RSTVEC),
DEFINE_PROP_END_OF_LIST(),
};
--
2.31.1
- [PATCH v3 0/8] RISC-V: Add support for ePMP v0.9.1, Alistair Francis, 2021/04/12
- [PATCH v3 1/8] target/riscv: Fix the PMP is locked check when using TOR, Alistair Francis, 2021/04/12
- [PATCH v3 2/8] target/riscv: Define ePMP mseccfg, Alistair Francis, 2021/04/12
- [PATCH v3 4/8] target/riscv: Add ePMP CSR access functions, Alistair Francis, 2021/04/12
- [PATCH v3 3/8] target/riscv: Add the ePMP feature, Alistair Francis, 2021/04/12
- [PATCH v3 5/8] target/riscv: Implementation of enhanced PMP (ePMP), Alistair Francis, 2021/04/12
- [PATCH v3 6/8] target/riscv: Add a config option for ePMP,
Alistair Francis <=
- [PATCH v3 7/8] target/riscv/pmp: Remove outdated comment, Alistair Francis, 2021/04/12
- [PATCH v3 8/8] target/riscv: Add ePMP support for the Ibex CPU, Alistair Francis, 2021/04/12