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[PATCH RESEND v8 19/20] target/riscv/cpu.c: honor user choice in cpu_cfg
From: |
Daniel Henrique Barboza |
Subject: |
[PATCH RESEND v8 19/20] target/riscv/cpu.c: honor user choice in cpu_cfg_ext_auto_update() |
Date: |
Thu, 24 Aug 2023 19:14:39 -0300 |
Add a new cpu_cfg_ext_is_user_set() helper to check if an extension was
set by the user in the command line. Use it inside
cpu_cfg_ext_auto_update() to verify if the user set a certain extension
and, if that's the case, do not change its value.
This will make us honor user choice instead of overwriting the values.
Users will then be informed whether they're using an incompatible set of
extensions instead of QEMU setting a magic value that works.
For example, we'll now error out if the user explictly set 'zce' to true
and 'zca' to false:
$ ./build/qemu-system-riscv64 -M virt -cpu rv64,zce=true,zca=false -nographic
qemu-system-riscv64: Zcf/Zcd/Zcb/Zcmp/Zcmt extensions require Zca extension
This didn't happen before because we were enabling 'zca' if 'zce' was enabled
regardless if the user explictly set 'zca' to false.
Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
---
target/riscv/cpu.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index ae8c35402f..e07b2c73e7 100644
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -196,6 +196,12 @@ static int cpu_cfg_ext_get_min_version(uint32_t ext_offset)
return PRIV_VERSION_1_10_0;
}
+static bool cpu_cfg_ext_is_user_set(uint32_t ext_offset)
+{
+ return g_hash_table_contains(multi_ext_user_opts,
+ GUINT_TO_POINTER(ext_offset));
+}
+
static void cpu_cfg_ext_auto_update(RISCVCPU *cpu, uint32_t ext_offset,
bool value)
{
@@ -207,6 +213,10 @@ static void cpu_cfg_ext_auto_update(RISCVCPU *cpu,
uint32_t ext_offset,
return;
}
+ if (cpu_cfg_ext_is_user_set(ext_offset)) {
+ return;
+ }
+
if (value && env->priv_ver != PRIV_VERSION_LATEST) {
/* Do not enable it if priv_ver is older than min_version */
min_version = cpu_cfg_ext_get_min_version(ext_offset);
--
2.41.0
- Re: [PATCH RESEND v8 11/20] avocado, risc-v: add opensbi tests for 'max' CPU, (continued)
- [PATCH RESEND v8 13/20] target/riscv/cpu.c: use offset in isa_ext_is_enabled/update_enabled, Daniel Henrique Barboza, 2023/08/24
- [PATCH RESEND v8 15/20] target/riscv/cpu.c: introduce cpu_cfg_ext_auto_update(), Daniel Henrique Barboza, 2023/08/24
- [PATCH RESEND v8 17/20] target/riscv/cpu.c: introduce RISCVCPUMultiExtConfig, Daniel Henrique Barboza, 2023/08/24
- [PATCH RESEND v8 18/20] target/riscv: use isa_ext_update_enabled() in init_max_cpu_extensions(), Daniel Henrique Barboza, 2023/08/24
- [PATCH RESEND v8 19/20] target/riscv/cpu.c: honor user choice in cpu_cfg_ext_auto_update(),
Daniel Henrique Barboza <=
- [PATCH RESEND v8 20/20] target/riscv/cpu.c: consider user option with RVG, Daniel Henrique Barboza, 2023/08/24
- Re: [PATCH RESEND v8 00/20] riscv: 'max' CPU, detect user choice in TCG, Andrew Jones, 2023/08/31