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6f23aaeb9b
qemu/target/riscv
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Alexandre Ghiti 6f23aaeb9b
riscv: Allow user to set the satp mode 
RISC-V specifies multiple sizes for addressable memory and Linux probes for
the machine's support at startup via the satp CSR register (done in
csr.c:validate_vm).

As per the specification, sv64 must support sv57, which in turn must
support sv48...etc. So we can restrict machine support by simply setting the
"highest" supported mode and the bare mode is always supported.

You can set the satp mode using the new properties "sv32", "sv39", "sv48",
"sv57" and "sv64" as follows:
-cpu rv64,sv57=on  # Linux will boot using sv57 scheme
-cpu rv64,sv39=on  # Linux will boot using sv39 scheme
-cpu rv64,sv57=off # Linux will boot using sv48 scheme
-cpu rv64          # Linux will boot using sv57 scheme by default

We take the highest level set by the user:
-cpu rv64,sv48=on,sv57=on # Linux will boot using sv57 scheme

We make sure that invalid configurations are rejected:
-cpu rv64,sv39=off,sv48=on # sv39 must be supported if higher modes are
                           # enabled

We accept "redundant" configurations:
-cpu rv64,sv48=on,sv57=off # Linux will boot using sv48 scheme

And contradictory configurations:
-cpu rv64,sv48=on,sv48=off # Linux will boot using sv39 scheme

Co-Developed-by: Ludovic Henry <ludovic@rivosinc.com>
Signed-off-by: Ludovic Henry <ludovic@rivosinc.com>
Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Bin Meng <bmeng@tinylab.org>
Acked-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Frank Chang <frank.chang@sifive.com>
Message-ID: <20230303131252.892893-4-alexghiti@rivosinc.com>
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
2023-03-06 08:09:42 -08:00
..
insn_trans target/riscv: implement Zicbom extension 2023-03-05 11:49:42 -08:00
arch_dump.c dump: Replace opaque DumpState pointer with a typed one 2022-10-06 19:30:43 +04:00
bitmanip_helper.c target/riscv: rvk: add support for zbkx extension 2022-04-29 10:47:45 +10:00
common-semi-target.h semihosting: Split out common-semi-target.h 2022-06-28 04:35:07 +05:30
cpu_bits.h target/riscv: Add csr support for svadu 2023-03-01 17:28:15 -08:00
cpu_helper.c Merge patch series "target/riscv: Add support for Svadu extension" 2023-03-01 17:30:34 -08:00
cpu_user.h
cpu_vendorid.h RISC-V: Add initial support for T-Head C906 2023-02-07 08:19:23 +10:00
cpu-param.h Normalize header guard symbol definition 2022-05-11 16:50:26 +02:00
cpu.c riscv: Allow user to set the satp mode 2023-03-06 08:09:42 -08:00
cpu.h riscv: Allow user to set the satp mode 2023-03-06 08:09:42 -08:00
crypto_helper.c target/riscv: rvk: add support for zksed/zksh extension 2022-04-29 10:47:45 +10:00
csr.c riscv: Allow user to set the satp mode 2023-03-06 08:09:42 -08:00
debug.c target/riscv: set tval for triggered watchpoints 2023-02-07 08:19:23 +10:00
debug.h target/riscv: Add itrigger support when icount is enabled 2023-01-06 10:42:55 +10:00
fpu_helper.c target/riscv: Remove helper_set_rod_rounding_mode 2023-01-20 10:14:14 +10:00
gdbstub.c target/riscv: gdbstub: Drop the vector CSRs in riscv-vector.xml 2023-03-01 16:40:20 -08:00
helper.h target/riscv: implement Zicbom extension 2023-03-05 11:49:42 -08:00
insn16.decode target/riscv: fix shifts shamt value for rv128c 2022-09-07 09:18:32 +02:00
insn32.decode target/riscv: add Zicbop cbo.prefetch{i, r, m} placeholder 2023-03-05 11:49:43 -08:00
instmap.h target/riscv: Update [m|h]tinst CSR in riscv_cpu_do_interrupt() 2022-09-07 09:18:32 +02:00
internals.h target/riscv: rvv: Add mask agnostic for vv instructions 2022-09-07 09:18:32 +02:00
Kconfig meson: Introduce target-specific Kconfig 2021-07-09 18:21:34 +02:00
kvm_riscv.h target/riscv: Support setting external interrupt by KVM 2022-01-21 15:52:56 +10:00
kvm-stub.c target/riscv: Support setting external interrupt by KVM 2022-01-21 15:52:56 +10:00
kvm.c target/riscv: fix SBI getchar handler for KVM 2023-02-07 08:19:23 +10:00
m128_helper.c target/riscv: support for 128-bit M extension 2022-01-08 15:46:10 +10:00
machine.c target/riscv/cpu: remove CPUArchState::features and friends 2023-03-01 13:47:16 -08:00
meson.build RISC-V: Adding XTheadCmo ISA extension 2023-02-07 08:19:23 +10:00
monitor.c target/riscv: remove RISCV_FEATURE_MMU 2023-03-01 13:47:15 -08:00
op_helper.c target/riscv: implement Zicbom extension 2023-03-05 11:49:42 -08:00
pmp.c target/riscv: remove RISCV_FEATURE_MMU 2023-03-01 13:47:15 -08:00
pmp.h target/riscv: Fix PMP propagation for tlb 2023-01-06 10:42:55 +10:00
pmu.c hw/riscv: virt: Add PMU DT node to the device tree 2022-09-07 09:19:15 +02:00
pmu.h riscv: Clean up includes 2023-02-08 07:28:05 +01:00
sbi_ecall_interface.h Clean up ill-advised or unusual header guards 2022-05-11 16:50:01 +02:00
time_helper.c target/riscv: No need to re-start QEMU timer when timecmp == UINT64_MAX 2023-02-07 08:19:23 +10:00
time_helper.h target/riscv: Add stimecmp support 2022-09-07 09:19:15 +02:00
trace-events target/riscv: Add ePMP CSR access functions 2021-05-11 20:02:06 +10:00
trace.h trace: switch position of headers to what Meson requires 2020-08-21 06:18:24 -04:00
translate.c target/riscv: implement Zicboz extension 2023-03-05 11:49:20 -08:00
vector_helper.c target/riscv/vector_helper.c: avoid env_archcpu() when reading RISCVCPUConfig 2023-03-01 18:09:45 -08:00
xthead.decode RISC-V: Adding XTheadFmv ISA extension 2023-02-07 08:19:23 +10:00
XVentanaCondOps.decode target/riscv: Add XVentanaCondOps custom extension 2022-02-16 12:24:18 +10:00