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[PULL 12/30] target/riscv: Validate the mode in write_vstvec
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From: |
Alistair Francis |
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Subject: |
[PULL 12/30] target/riscv: Validate the mode in write_vstvec |
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Date: |
Thu, 18 Jul 2024 12:09:54 +1000 |
From: Jiayi Li <lijiayi@eswincomputing.com>
Base on the riscv-privileged spec, vstvec substitutes for the usual stvec.
Therefore, the encoding of the MODE should also be restricted to 0 and 1.
Signed-off-by: Jiayi Li <lijiayi@eswincomputing.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: LIU Zhiwei <zhiwei_liu@linux.alibaba.com>
Message-ID: <20240701022553.1982-1-lijiayi@eswincomputing.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
target/riscv/csr.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/target/riscv/csr.c b/target/riscv/csr.c
index 432c59dc66..f9229d92ab 100644
--- a/target/riscv/csr.c
+++ b/target/riscv/csr.c
@@ -3791,7 +3791,12 @@ static RISCVException read_vstvec(CPURISCVState *env,
int csrno,
static RISCVException write_vstvec(CPURISCVState *env, int csrno,
target_ulong val)
{
- env->vstvec = val;
+ /* bits [1:0] encode mode; 0 = direct, 1 = vectored, 2 >= reserved */
+ if ((val & 3) < 2) {
+ env->vstvec = val;
+ } else {
+ qemu_log_mask(LOG_UNIMP, "CSR_VSTVEC: reserved mode not supported\n");
+ }
return RISCV_EXCP_NONE;
}
--
2.45.2
- [PULL 04/30] disas/riscv: Support zcmop disassemble, (continued)
- [PULL 04/30] disas/riscv: Support zcmop disassemble, Alistair Francis, 2024/07/17
- [PULL 05/30] target/riscv: Support Zama16b extension, Alistair Francis, 2024/07/17
- [PULL 07/30] target/riscv: Add AMO instructions for Zabha, Alistair Francis, 2024/07/17
- [PULL 09/30] target/riscv: Add amocas.[b|h] for Zabha, Alistair Francis, 2024/07/17
- [PULL 10/30] target/riscv: Expose zabha extension as a cpu property, Alistair Francis, 2024/07/17
- [PULL 08/30] target/riscv: Move gen_cmpxchg before adding amocas.[b|h], Alistair Francis, 2024/07/17
- [PULL 06/30] target/riscv: Move gen_amo before implement Zabha, Alistair Francis, 2024/07/17
- [PULL 11/30] disas/riscv: Support zabha disassemble, Alistair Francis, 2024/07/17
- [PULL 12/30] target/riscv: Validate the mode in write_vstvec,
Alistair Francis <=
- [PULL 13/30] disas/riscv: Add decode for Zawrs extension, Alistair Francis, 2024/07/17
- [PULL 14/30] target/riscv/kvm: update KVM regs to Linux 6.10-rc5, Alistair Francis, 2024/07/17
- [PULL 15/30] target/riscv: Combine set_mode and set_virt functions., Alistair Francis, 2024/07/17
- [PULL 16/30] target/riscv: Fix the predicate functions for mhpmeventhX CSRs, Alistair Francis, 2024/07/17
- [PULL 17/30] target/riscv: Add cycle & instret privilege mode filtering properties, Alistair Francis, 2024/07/17
- [PULL 18/30] target/riscv: Add cycle & instret privilege mode filtering definitions, Alistair Francis, 2024/07/17
- [PULL 19/30] target/riscv: Add cycle & instret privilege mode filtering support, Alistair Francis, 2024/07/17
- [PULL 20/30] target/riscv: Only set INH fields if priv mode is available, Alistair Francis, 2024/07/17
- [PULL 21/30] target/riscv: Implement privilege mode filtering for cycle/instret, Alistair Francis, 2024/07/17