diff options
| author | Guo Ren <ren_guo@c-sky.com> | 2022-02-04 10:26:54 +0800 |
|---|---|---|
| committer | Alistair Francis <alistair.francis@wdc.com> | 2022-02-16 12:25:52 +1000 |
| commit | 05e6ca5e156d1d114d1eb878cae9744cb4a539e3 (patch) | |
| tree | 2e4a024c5c68f73b857957c5c3b249afd52e6a6b /target | |
| parent | e8f79343cfc886aaa225cec9faf6881f75945209 (diff) | |
target/riscv: Ignore reserved bits in PTE for RV64
Highest bits of PTE has been used for svpbmt, ref: [1], [2], so we
need to ignore them. They cannot be a part of ppn.
1: The RISC-V Instruction Set Manual, Volume II: Privileged Architecture
4.4 Sv39: Page-Based 39-bit Virtual-Memory System
4.5 Sv48: Page-Based 48-bit Virtual-Memory System
2: https://github.com/riscv/virtual-memory/blob/main/specs/663-Svpbmt-diff.pdf
Signed-off-by: Guo Ren <ren_guo@c-sky.com>
Reviewed-by: Liu Zhiwei <zhiwei_liu@c-sky.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Cc: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20220204022658.18097-2-liweiwei@iscas.ac.cn>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Diffstat (limited to 'target')
| -rw-r--r-- | target/riscv/cpu.h | 15 | ||||
| -rw-r--r-- | target/riscv/cpu_bits.h | 3 | ||||
| -rw-r--r-- | target/riscv/cpu_helper.c | 13 |
3 files changed, 30 insertions, 1 deletions
diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h index 7ecb1387dd..cefccb4016 100644 --- a/target/riscv/cpu.h +++ b/target/riscv/cpu.h @@ -359,6 +359,8 @@ struct RISCVCPUConfig { bool ext_counters; bool ext_ifencei; bool ext_icsr; + bool ext_svnapot; + bool ext_svpbmt; bool ext_zfh; bool ext_zfhmin; bool ext_zve32f; @@ -558,6 +560,19 @@ static inline int riscv_cpu_xlen(CPURISCVState *env) return 16 << env->xl; } +#ifdef TARGET_RISCV32 +#define riscv_cpu_sxl(env) ((void)(env), MXL_RV32) +#else +static inline RISCVMXL riscv_cpu_sxl(CPURISCVState *env) +{ +#ifdef CONFIG_USER_ONLY + return env->misa_mxl; +#else + return get_field(env->mstatus, MSTATUS64_SXL); +#endif +} +#endif + /* * Encode LMUL to lmul as follows: * LMUL vlmul lmul diff --git a/target/riscv/cpu_bits.h b/target/riscv/cpu_bits.h index 068c4d8034..b3489cbc10 100644 --- a/target/riscv/cpu_bits.h +++ b/target/riscv/cpu_bits.h @@ -565,6 +565,9 @@ typedef enum { /* Page table PPN shift amount */ #define PTE_PPN_SHIFT 10 +/* Page table PPN mask */ +#define PTE_PPN_MASK 0x3FFFFFFFFFFC00ULL + /* Leaf page shift amount */ #define PGSHIFT 12 diff --git a/target/riscv/cpu_helper.c b/target/riscv/cpu_helper.c index 430060dcd8..7df4569526 100644 --- a/target/riscv/cpu_helper.c +++ b/target/riscv/cpu_helper.c @@ -751,6 +751,8 @@ static int get_physical_address(CPURISCVState *env, hwaddr *physical, MemTxAttrs attrs = MEMTXATTRS_UNSPECIFIED; int mode = mmu_idx & TB_FLAGS_PRIV_MMU_MASK; bool use_background = false; + hwaddr ppn; + RISCVCPU *cpu = env_archcpu(env); /* * Check if we should use the background registers for the two @@ -919,7 +921,16 @@ restart: return TRANSLATE_FAIL; } - hwaddr ppn = pte >> PTE_PPN_SHIFT; + if (riscv_cpu_sxl(env) == MXL_RV32) { + ppn = pte >> PTE_PPN_SHIFT; + } else if (cpu->cfg.ext_svpbmt || cpu->cfg.ext_svnapot) { + ppn = (pte & (target_ulong)PTE_PPN_MASK) >> PTE_PPN_SHIFT; + } else { + ppn = pte >> PTE_PPN_SHIFT; + if ((pte & ~(target_ulong)PTE_PPN_MASK) >> PTE_PPN_SHIFT) { + return TRANSLATE_FAIL; + } + } if (!(pte & PTE_V)) { /* Invalid PTE */ |