spapr: Small fixes to rtas_ibm_get_system_parameter, remove rtas_st_buffer
rtas_st_buffer() appears in spapr.h as though it were a widely used helper, but in fact it is only used for saving data in a format used by rtas_ibm_get_system_parameter(). This changes it to a local helper more specifically for that function. While we're there fix a couple of small defects in rtas_ibm_get_system_parameter: - For the string value SPLPAR_CHARACTERISTICS, it wasn't including the terminating \0 in the length which it should according to LoPAPR 7.3.16.1 - It now checks that the supplied buffer has at least enough space for the length of the returned data, and returns an error if it does not. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Reviewed-by: Alexey Kardashevskiy <aik@ozlabs.ru>
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@ -229,6 +229,19 @@ static void rtas_stop_self(PowerPCCPU *cpu, sPAPRMachineState *spapr,
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env->msr = 0;
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}
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static inline int sysparm_st(target_ulong addr, target_ulong len,
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const void *val, uint16_t vallen)
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{
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hwaddr phys = ppc64_phys_to_real(addr);
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if (len < 2) {
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return RTAS_OUT_SYSPARM_PARAM_ERROR;
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}
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stw_be_phys(&address_space_memory, phys, vallen);
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cpu_physical_memory_write(phys + 2, val, MIN(len - 2, vallen));
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return RTAS_OUT_SUCCESS;
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}
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static void rtas_ibm_get_system_parameter(PowerPCCPU *cpu,
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sPAPRMachineState *spapr,
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uint32_t token, uint32_t nargs,
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@ -238,7 +251,7 @@ static void rtas_ibm_get_system_parameter(PowerPCCPU *cpu,
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target_ulong parameter = rtas_ld(args, 0);
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target_ulong buffer = rtas_ld(args, 1);
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target_ulong length = rtas_ld(args, 2);
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target_ulong ret = RTAS_OUT_SUCCESS;
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target_ulong ret;
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switch (parameter) {
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case RTAS_SYSPARM_SPLPAR_CHARACTERISTICS: {
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@ -250,18 +263,18 @@ static void rtas_ibm_get_system_parameter(PowerPCCPU *cpu,
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current_machine->ram_size / M_BYTE,
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smp_cpus,
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max_cpus);
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rtas_st_buffer(buffer, length, (uint8_t *)param_val, strlen(param_val));
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ret = sysparm_st(buffer, length, param_val, strlen(param_val) + 1);
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g_free(param_val);
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break;
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}
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case RTAS_SYSPARM_DIAGNOSTICS_RUN_MODE: {
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uint8_t param_val = DIAGNOSTICS_RUN_MODE_DISABLED;
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rtas_st_buffer(buffer, length, ¶m_val, sizeof(param_val));
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ret = sysparm_st(buffer, length, ¶m_val, sizeof(param_val));
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break;
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}
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case RTAS_SYSPARM_UUID:
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rtas_st_buffer(buffer, length, qemu_uuid, (qemu_uuid_set ? 16 : 0));
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ret = sysparm_st(buffer, length, qemu_uuid, (qemu_uuid_set ? 16 : 0));
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break;
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default:
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ret = RTAS_OUT_NOT_SUPPORTED;
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@ -408,14 +408,15 @@ int spapr_allocate_irq_block(int num, bool lsi, bool msi);
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#define RTAS_SLOT_PERM_ERR_LOG 2
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/* RTAS return codes */
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#define RTAS_OUT_SUCCESS 0
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#define RTAS_OUT_NO_ERRORS_FOUND 1
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#define RTAS_OUT_HW_ERROR -1
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#define RTAS_OUT_BUSY -2
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#define RTAS_OUT_PARAM_ERROR -3
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#define RTAS_OUT_NOT_SUPPORTED -3
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#define RTAS_OUT_NO_SUCH_INDICATOR -3
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#define RTAS_OUT_NOT_AUTHORIZED -9002
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#define RTAS_OUT_SUCCESS 0
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#define RTAS_OUT_NO_ERRORS_FOUND 1
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#define RTAS_OUT_HW_ERROR -1
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#define RTAS_OUT_BUSY -2
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#define RTAS_OUT_PARAM_ERROR -3
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#define RTAS_OUT_NOT_SUPPORTED -3
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#define RTAS_OUT_NO_SUCH_INDICATOR -3
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#define RTAS_OUT_NOT_AUTHORIZED -9002
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#define RTAS_OUT_SYSPARM_PARAM_ERROR -9999
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/* RTAS tokens */
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#define RTAS_TOKEN_BASE 0x2000
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@ -513,17 +514,6 @@ static inline void rtas_st_buffer_direct(target_ulong phys,
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MIN(buffer_len, phys_len));
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}
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static inline void rtas_st_buffer(target_ulong phys, target_ulong phys_len,
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uint8_t *buffer, uint16_t buffer_len)
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{
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if (phys_len < 2) {
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return;
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}
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stw_be_phys(&address_space_memory,
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ppc64_phys_to_real(phys), buffer_len);
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rtas_st_buffer_direct(phys + 2, phys_len - 2, buffer, buffer_len);
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}
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typedef void (*spapr_rtas_fn)(PowerPCCPU *cpu, sPAPRMachineState *sm,
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uint32_t token,
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uint32_t nargs, target_ulong args,
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