[PULL 65/89] target/riscv: Use cpu_ld*_code_mmu for HLVX

[Alistair Francis]

From: Richard Henderson <richard.henderson@linaro.org>

Use the new functions to properly check execute permission
for the read rather than read permission.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Weiwei Li <liweiwei@iscas.ac.cn>
Tested-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Message-Id: <20230325105429.1142530-10-richard.henderson@linaro.org>
Message-Id: <20230412114333.118895-10-richard.henderson@linaro.org>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
 target/riscv/op_helper.c | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/target/riscv/op_helper.c b/target/riscv/op_helper.c
index 0adfd1ca9a..49179e7a5a 100644
--- a/target/riscv/op_helper.c
+++ b/target/riscv/op_helper.c
@@ -427,18 +427,27 @@ void helper_hyp_gvma_tlb_flush(CPURISCVState *env)
     helper_hyp_tlb_flush(env);
 }
 
+/*
+ * TODO: These implementations are not quite correct.  They perform the
+ * access using execute permission just fine, but the final PMP check
+ * is supposed to have read permission as well.  Without replicating
+ * a fair fraction of cputlb.c, fixing this requires adding new mmu_idx
+ * which would imply that exact check in tlb_fill.
+ */
 target_ulong helper_hyp_hlvx_hu(CPURISCVState *env, target_ulong address)
 {
     int mmu_idx = cpu_mmu_index(env, true) | MMU_HYP_ACCESS_BIT;
+    MemOpIdx oi = make_memop_idx(MO_TEUW, mmu_idx);
 
-    return cpu_lduw_mmuidx_ra(env, address, mmu_idx, GETPC());
+    return cpu_ldw_code_mmu(env, address, oi, GETPC());
 }
 
 target_ulong helper_hyp_hlvx_wu(CPURISCVState *env, target_ulong address)
 {
     int mmu_idx = cpu_mmu_index(env, true) | MMU_HYP_ACCESS_BIT;
+    MemOpIdx oi = make_memop_idx(MO_TEUL, mmu_idx);
 
-    return cpu_ldl_mmuidx_ra(env, address, mmu_idx, GETPC());
+    return cpu_ldl_code_mmu(env, address, oi, GETPC());
 }
 
 #endif /* !CONFIG_USER_ONLY */
-- 
2.40.0