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[PATCH v6 08/25] accel/tcg: Add cpu_ld*_code_mmu
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From: |
Richard Henderson |
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Subject: |
[PATCH v6 08/25] accel/tcg: Add cpu_ld*_code_mmu |
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Date: |
Sat, 25 Mar 2023 03:54:12 -0700 |
At least RISC-V has the need to be able to perform a read
using execute permissions, outside of translation.
Add helpers to facilitate this.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
include/exec/cpu_ldst.h | 9 +++++++
accel/tcg/cputlb.c | 48 ++++++++++++++++++++++++++++++++++
accel/tcg/user-exec.c | 58 +++++++++++++++++++++++++++++++++++++++++
3 files changed, 115 insertions(+)
diff --git a/include/exec/cpu_ldst.h b/include/exec/cpu_ldst.h
index 09b55cc0ee..c141f0394f 100644
--- a/include/exec/cpu_ldst.h
+++ b/include/exec/cpu_ldst.h
@@ -445,6 +445,15 @@ static inline CPUTLBEntry *tlb_entry(CPUArchState *env,
uintptr_t mmu_idx,
# define cpu_stq_mmu cpu_stq_le_mmu
#endif
+uint8_t cpu_ldb_code_mmu(CPUArchState *env, abi_ptr addr,
+ MemOpIdx oi, uintptr_t ra);
+uint16_t cpu_ldw_code_mmu(CPUArchState *env, abi_ptr addr,
+ MemOpIdx oi, uintptr_t ra);
+uint32_t cpu_ldl_code_mmu(CPUArchState *env, abi_ptr addr,
+ MemOpIdx oi, uintptr_t ra);
+uint64_t cpu_ldq_code_mmu(CPUArchState *env, abi_ptr addr,
+ MemOpIdx oi, uintptr_t ra);
+
uint32_t cpu_ldub_code(CPUArchState *env, abi_ptr addr);
uint32_t cpu_lduw_code(CPUArchState *env, abi_ptr addr);
uint32_t cpu_ldl_code(CPUArchState *env, abi_ptr addr);
diff --git a/accel/tcg/cputlb.c b/accel/tcg/cputlb.c
index e984a98dc4..e62c8f3c3f 100644
--- a/accel/tcg/cputlb.c
+++ b/accel/tcg/cputlb.c
@@ -2768,3 +2768,51 @@ uint64_t cpu_ldq_code(CPUArchState *env, abi_ptr addr)
MemOpIdx oi = make_memop_idx(MO_TEUQ, cpu_mmu_index(env, true));
return full_ldq_code(env, addr, oi, 0);
}
+
+uint8_t cpu_ldb_code_mmu(CPUArchState *env, abi_ptr addr,
+ MemOpIdx oi, uintptr_t retaddr)
+{
+ return full_ldub_code(env, addr, oi, retaddr);
+}
+
+uint16_t cpu_ldw_code_mmu(CPUArchState *env, abi_ptr addr,
+ MemOpIdx oi, uintptr_t retaddr)
+{
+ MemOp mop = get_memop(oi);
+ int idx = get_mmuidx(oi);
+ uint16_t ret;
+
+ ret = full_lduw_code(env, addr, make_memop_idx(MO_TEUW, idx), retaddr);
+ if ((mop & MO_BSWAP) != MO_TE) {
+ ret = bswap16(ret);
+ }
+ return ret;
+}
+
+uint32_t cpu_ldl_code_mmu(CPUArchState *env, abi_ptr addr,
+ MemOpIdx oi, uintptr_t retaddr)
+{
+ MemOp mop = get_memop(oi);
+ int idx = get_mmuidx(oi);
+ uint32_t ret;
+
+ ret = full_ldl_code(env, addr, make_memop_idx(MO_TEUL, idx), retaddr);
+ if ((mop & MO_BSWAP) != MO_TE) {
+ ret = bswap32(ret);
+ }
+ return ret;
+}
+
+uint64_t cpu_ldq_code_mmu(CPUArchState *env, abi_ptr addr,
+ MemOpIdx oi, uintptr_t retaddr)
+{
+ MemOp mop = get_memop(oi);
+ int idx = get_mmuidx(oi);
+ uint64_t ret;
+
+ ret = full_ldq_code(env, addr, make_memop_idx(MO_TEUQ, idx), retaddr);
+ if ((mop & MO_BSWAP) != MO_TE) {
+ ret = bswap64(ret);
+ }
+ return ret;
+}
diff --git a/accel/tcg/user-exec.c b/accel/tcg/user-exec.c
index 7b37fd229e..44e0ea55ba 100644
--- a/accel/tcg/user-exec.c
+++ b/accel/tcg/user-exec.c
@@ -1222,6 +1222,64 @@ uint64_t cpu_ldq_code(CPUArchState *env, abi_ptr ptr)
return ret;
}
+uint8_t cpu_ldb_code_mmu(CPUArchState *env, abi_ptr addr,
+ MemOpIdx oi, uintptr_t ra)
+{
+ void *haddr;
+ uint8_t ret;
+
+ haddr = cpu_mmu_lookup(env, addr, oi, ra, MMU_INST_FETCH);
+ ret = ldub_p(haddr);
+ clear_helper_retaddr();
+ return ret;
+}
+
+uint16_t cpu_ldw_code_mmu(CPUArchState *env, abi_ptr addr,
+ MemOpIdx oi, uintptr_t ra)
+{
+ void *haddr;
+ uint16_t ret;
+
+ haddr = cpu_mmu_lookup(env, addr, oi, ra, MMU_INST_FETCH);
+ ret = lduw_p(haddr);
+ clear_helper_retaddr();
+ if (get_memop(oi) & MO_BSWAP) {
+ ret = bswap16(ret);
+ }
+ return ret;
+}
+
+uint32_t cpu_ldl_code_mmu(CPUArchState *env, abi_ptr addr,
+ MemOpIdx oi, uintptr_t ra)
+{
+ void *haddr;
+ uint32_t ret;
+
+ haddr = cpu_mmu_lookup(env, addr, oi, ra, MMU_INST_FETCH);
+ ret = ldl_p(haddr);
+ clear_helper_retaddr();
+ if (get_memop(oi) & MO_BSWAP) {
+ ret = bswap32(ret);
+ }
+ return ret;
+}
+
+uint64_t cpu_ldq_code_mmu(CPUArchState *env, abi_ptr addr,
+ MemOpIdx oi, uintptr_t ra)
+{
+ void *haddr;
+ uint64_t ret;
+
+ validate_memop(oi, MO_BEUQ);
+ haddr = cpu_mmu_lookup(env, addr, oi, ra, MMU_DATA_LOAD);
+ ret = ldq_p(haddr);
+ clear_helper_retaddr();
+ if (get_memop(oi) & MO_BSWAP) {
+ ret = bswap64(ret);
+ }
+ return ret;
+}
+
#include "ldst_common.c.inc"
/*
--
2.34.1
- Re: [PATCH v6 13/25] target/riscv: Introduce mmuidx_priv, (continued)
[PATCH v6 14/25] target/riscv: Introduce mmuidx_2stage, Richard Henderson, 2023/03/25
[PATCH v6 21/25] target/riscv: Suppress pte update with is_debug, Richard Henderson, 2023/03/25
[PATCH v6 17/25] target/riscv: Check SUM in the correct register, Richard Henderson, 2023/03/25
[PATCH v6 01/25] target/riscv: Extract virt enabled state from tb flags, Richard Henderson, 2023/03/25
[PATCH v6 09/25] target/riscv: Use cpu_ld*_code_mmu for HLVX, Richard Henderson, 2023/03/25
[PATCH v6 02/25] target/riscv: Add a general status enum for extensions, Richard Henderson, 2023/03/25
[PATCH v6 08/25] accel/tcg: Add cpu_ld*_code_mmu,
Richard Henderson <=
[PATCH v6 04/25] target/riscv: Remove mstatus_hs_{fs, vs} from tb_flags, Richard Henderson, 2023/03/25
[PATCH v6 18/25] target/riscv: Hoist second stage mode change to callers, Richard Henderson, 2023/03/25
[PATCH v6 05/25] target/riscv: Add a tb flags field for vstart, Richard Henderson, 2023/03/25
[PATCH v6 24/25] target/riscv: Reorg access check in get_physical_address, Richard Henderson, 2023/03/25
[PATCH v6 15/25] target/riscv: Move hstatus.spvp check to check_access_hlsv, Richard Henderson, 2023/03/25
[PATCH v6 25/25] target/riscv: Reorg sum check in get_physical_address, Richard Henderson, 2023/03/25
Re: [PATCH v6 00/25] target/riscv: MSTATUS_SUM + cleanups, Richard Henderson, 2023/03/26