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[PATCH 3/3] target/riscv: flush TLB pages if PMP permission has been cha
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From: |
Jim Shu |
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Subject: |
[PATCH 3/3] target/riscv: flush TLB pages if PMP permission has been changed |
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Date: |
Sun, 21 Feb 2021 22:01:22 +0800 |
If PMP permission of any address has been changed by updating PMP entry,
flush all TLB pages to prevent from getting old permission.
Signed-off-by: Jim Shu <cwshu@andestech.com>
---
target/riscv/pmp.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/target/riscv/pmp.c b/target/riscv/pmp.c
index ebd874cde3..cff020122a 100644
--- a/target/riscv/pmp.c
+++ b/target/riscv/pmp.c
@@ -28,6 +28,7 @@
#include "qapi/error.h"
#include "cpu.h"
#include "trace.h"
+#include "exec/exec-all.h"
static void pmp_write_cfg(CPURISCVState *env, uint32_t addr_index,
uint8_t val);
@@ -347,6 +348,9 @@ void pmpcfg_csr_write(CPURISCVState *env, uint32_t
reg_index,
cfg_val = (val >> 8 * i) & 0xff;
pmp_write_cfg(env, (reg_index * 4) + i, cfg_val);
}
+
+ /* If PMP permission of any addr has been changed, flush TLB pages. */
+ tlb_flush(env_cpu(env));
}
--
2.30.1