target/riscv: Add short-isa-string option
Because some operating systems don't correctly parse long ISA extension string, this commit adds short-isa-string boolean option to disable generating long ISA extension strings on Device Tree. For instance, enabling Zfinx and Zdinx extensions and booting Linux (5.17 or earlier) with FPU support caused a kernel panic. Operating Systems which short-isa-string might be helpful: 1. Linux (5.17 or earlier) 2. FreeBSD (at least 14.0-CURRENT) 3. OpenBSD (at least current development version) Signed-off-by: Tsukasa OI <research_trasio@irq.a4lg.com> Acked-by: Alistair Francis <alistair.francis@wdc.com> Message-Id: <7c1fe5f06b0a7646a47e9bcdddb1042bb60c69c8.1652181972.git.research_trasio@irq.a4lg.com> Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
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@ -879,6 +879,8 @@ static Property riscv_cpu_properties[] = {
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DEFINE_PROP_BOOL("x-aia", RISCVCPU, cfg.aia, false),
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DEFINE_PROP_BOOL("x-aia", RISCVCPU, cfg.aia, false),
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DEFINE_PROP_UINT64("resetvec", RISCVCPU, cfg.resetvec, DEFAULT_RSTVEC),
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DEFINE_PROP_UINT64("resetvec", RISCVCPU, cfg.resetvec, DEFAULT_RSTVEC),
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DEFINE_PROP_BOOL("short-isa-string", RISCVCPU, cfg.short_isa_string, false),
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DEFINE_PROP_END_OF_LIST(),
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DEFINE_PROP_END_OF_LIST(),
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};
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};
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@ -1049,7 +1051,9 @@ char *riscv_isa_string(RISCVCPU *cpu)
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}
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}
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}
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}
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*p = '\0';
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*p = '\0';
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if (!cpu->cfg.short_isa_string) {
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riscv_isa_string_ext(cpu, &isa_str, maxlen);
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riscv_isa_string_ext(cpu, &isa_str, maxlen);
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}
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return isa_str;
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return isa_str;
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}
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}
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@ -425,6 +425,8 @@ struct RISCVCPUConfig {
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bool aia;
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bool aia;
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bool debug;
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bool debug;
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uint64_t resetvec;
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uint64_t resetvec;
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bool short_isa_string;
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};
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};
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typedef struct RISCVCPUConfig RISCVCPUConfig;
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typedef struct RISCVCPUConfig RISCVCPUConfig;
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