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

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));
}