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target/riscv: flush TLB pages if PMP permission has been changed

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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>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 1613916082-19528-4-git-send-email-cwshu@andestech.com
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
This commit is contained in:
Jim Shu 2021-02-21 22:01:22 +08:00 committed by Alistair Francis
parent 663e119317
commit 2c2e0f2842
1 changed files with 4 additions and 0 deletions
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4
target/riscv/pmp.c
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@ -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));
}