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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.

Backports 2c2e0f2842520bcd25472285cfce39696e52e662
This commit is contained in:
Jim Shu 2021-03-30 15:09:11 -04:00 committed by Lioncash
parent 7dad65cea1
commit 85ccd1a71e
1 changed files with 4 additions and 0 deletions
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4
qemu/target/riscv/pmp.c
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@ -28,6 +28,7 @@
#include "qapi/error.h"
#include "cpu.h"
#include "qemu-common.h"
#include "exec/exec-all.h"
#ifndef CONFIG_USER_ONLY
@ -350,6 +351,9 @@ 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));
}