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[Qemu-ppc] [PULL 07/39] spapr: Small fixes to rtas_ibm_get_system_parame
From: |
David Gibson |
Subject: |
[Qemu-ppc] [PULL 07/39] spapr: Small fixes to rtas_ibm_get_system_parameter, remove rtas_st_buffer |
Date: |
Fri, 29 Jan 2016 16:06:39 +1100 |
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 <address@hidden>
Reviewed-by: Alexey Kardashevskiy <address@hidden>
---
hw/ppc/spapr_rtas.c | 21 +++++++++++++++++----
include/hw/ppc/spapr.h | 28 +++++++++-------------------
2 files changed, 26 insertions(+), 23 deletions(-)
diff --git a/hw/ppc/spapr_rtas.c b/hw/ppc/spapr_rtas.c
index 34b12a3..8b702b5 100644
--- a/hw/ppc/spapr_rtas.c
+++ b/hw/ppc/spapr_rtas.c
@@ -228,6 +228,19 @@ static void rtas_stop_self(PowerPCCPU *cpu,
sPAPRMachineState *spapr,
env->msr = 0;
}
+static inline int sysparm_st(target_ulong addr, target_ulong len,
+ const void *val, uint16_t vallen)
+{
+ hwaddr phys = ppc64_phys_to_real(addr);
+
+ if (len < 2) {
+ return RTAS_OUT_SYSPARM_PARAM_ERROR;
+ }
+ stw_be_phys(&address_space_memory, phys, vallen);
+ cpu_physical_memory_write(phys + 2, val, MIN(len - 2, vallen));
+ return RTAS_OUT_SUCCESS;
+}
+
static void rtas_ibm_get_system_parameter(PowerPCCPU *cpu,
sPAPRMachineState *spapr,
uint32_t token, uint32_t nargs,
@@ -237,7 +250,7 @@ static void rtas_ibm_get_system_parameter(PowerPCCPU *cpu,
target_ulong parameter = rtas_ld(args, 0);
target_ulong buffer = rtas_ld(args, 1);
target_ulong length = rtas_ld(args, 2);
- target_ulong ret = RTAS_OUT_SUCCESS;
+ target_ulong ret;
switch (parameter) {
case RTAS_SYSPARM_SPLPAR_CHARACTERISTICS: {
@@ -249,18 +262,18 @@ static void rtas_ibm_get_system_parameter(PowerPCCPU *cpu,
current_machine->ram_size / M_BYTE,
smp_cpus,
max_cpus);
- rtas_st_buffer(buffer, length, (uint8_t *)param_val,
strlen(param_val));
+ ret = sysparm_st(buffer, length, param_val, strlen(param_val) + 1);
g_free(param_val);
break;
}
case RTAS_SYSPARM_DIAGNOSTICS_RUN_MODE: {
uint8_t param_val = DIAGNOSTICS_RUN_MODE_DISABLED;
- rtas_st_buffer(buffer, length, ¶m_val, sizeof(param_val));
+ ret = sysparm_st(buffer, length, ¶m_val, sizeof(param_val));
break;
}
case RTAS_SYSPARM_UUID:
- rtas_st_buffer(buffer, length, qemu_uuid, (qemu_uuid_set ? 16 : 0));
+ ret = sysparm_st(buffer, length, qemu_uuid, (qemu_uuid_set ? 16 : 0));
break;
default:
ret = RTAS_OUT_NOT_SUPPORTED;
diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h
index 53af76a..1e10fc9 100644
--- a/include/hw/ppc/spapr.h
+++ b/include/hw/ppc/spapr.h
@@ -408,14 +408,15 @@ int spapr_allocate_irq_block(int num, bool lsi, bool msi);
#define RTAS_SLOT_PERM_ERR_LOG 2
/* RTAS return codes */
-#define RTAS_OUT_SUCCESS 0
-#define RTAS_OUT_NO_ERRORS_FOUND 1
-#define RTAS_OUT_HW_ERROR -1
-#define RTAS_OUT_BUSY -2
-#define RTAS_OUT_PARAM_ERROR -3
-#define RTAS_OUT_NOT_SUPPORTED -3
-#define RTAS_OUT_NO_SUCH_INDICATOR -3
-#define RTAS_OUT_NOT_AUTHORIZED -9002
+#define RTAS_OUT_SUCCESS 0
+#define RTAS_OUT_NO_ERRORS_FOUND 1
+#define RTAS_OUT_HW_ERROR -1
+#define RTAS_OUT_BUSY -2
+#define RTAS_OUT_PARAM_ERROR -3
+#define RTAS_OUT_NOT_SUPPORTED -3
+#define RTAS_OUT_NO_SUCH_INDICATOR -3
+#define RTAS_OUT_NOT_AUTHORIZED -9002
+#define RTAS_OUT_SYSPARM_PARAM_ERROR -9999
/* RTAS tokens */
#define RTAS_TOKEN_BASE 0x2000
@@ -513,17 +514,6 @@ static inline void rtas_st_buffer_direct(target_ulong phys,
MIN(buffer_len, phys_len));
}
-static inline void rtas_st_buffer(target_ulong phys, target_ulong phys_len,
- uint8_t *buffer, uint16_t buffer_len)
-{
- if (phys_len < 2) {
- return;
- }
- stw_be_phys(&address_space_memory,
- ppc64_phys_to_real(phys), buffer_len);
- rtas_st_buffer_direct(phys + 2, phys_len - 2, buffer, buffer_len);
-}
-
typedef void (*spapr_rtas_fn)(PowerPCCPU *cpu, sPAPRMachineState *sm,
uint32_t token,
uint32_t nargs, target_ulong args,
--
2.5.0
- [Qemu-ppc] [PULL 00/39] ppc-for-2.6 queue 20160129, David Gibson, 2016/01/29
- [Qemu-ppc] [PULL 04/39] macio: add dma_active to VMStateDescription, David Gibson, 2016/01/29
- [Qemu-ppc] [PULL 00/39] ppc-for-2.6 queue 20160129, David Gibson, 2016/01/29
- [Qemu-ppc] [PULL 05/39] mac_dbdma: add DBDMA controller state to VMStateDescription, David Gibson, 2016/01/29
- [Qemu-ppc] [PULL 02/39] target-ppc: use cpu_write_xer() helper in cpu_post_load, David Gibson, 2016/01/29
- [Qemu-ppc] [PULL 10/39] spapr: Don't create ibm, dynamic-reconfiguration-memory w/o DR LMBs, David Gibson, 2016/01/29
- [Qemu-ppc] [PULL 16/39] pseries: Clean up error handling in xics_system_init(), David Gibson, 2016/01/29
- [Qemu-ppc] [PULL 17/39] pseries: Clean up error reporting in ppc_spapr_init(), David Gibson, 2016/01/29
- [Qemu-ppc] [PULL 12/39] pseries: Clean up error handling of spapr_cpu_init(), David Gibson, 2016/01/29
- [Qemu-ppc] [PULL 07/39] spapr: Small fixes to rtas_ibm_get_system_parameter, remove rtas_st_buffer,
David Gibson <=
- [Qemu-ppc] [PULL 08/39] spapr: Remove rtas_st_buffer_direct(), David Gibson, 2016/01/29
- [Qemu-ppc] [PULL 19/39] target-ppc: kvm: fix floating point registers sync on little-endian hosts, David Gibson, 2016/01/29
- [Qemu-ppc] [PULL 39/39] target-ppc: Make every FPSCR_ macro have a corresponding FP_ macro, David Gibson, 2016/01/29
- [Qemu-ppc] [PULL 31/39] target-ppc: Rework ppc_store_slb, David Gibson, 2016/01/29
- [Qemu-ppc] [PULL 35/39] target-ppc: Split 44x tlbiva from ppc_tlb_invalidate_one(), David Gibson, 2016/01/29
- [Qemu-ppc] [PULL 29/39] target-ppc: Remove unused kvmppc_read_segment_page_sizes() stub, David Gibson, 2016/01/29
- [Qemu-ppc] [PULL 18/39] pseries: Clean up error reporting in htab migration functions, David Gibson, 2016/01/29
- [Qemu-ppc] [PULL 24/39] target-ppc: gdbstub: fix spe registers for little-endian guests, David Gibson, 2016/01/29
- [Qemu-ppc] [PULL 38/39] target-ppc: Allow more page sizes for POWER7 & POWER8 in TCG, David Gibson, 2016/01/29
- [Qemu-ppc] [PULL 36/39] target-ppc: Add new TLB invalidate by HPTE call for hash64 MMUs, David Gibson, 2016/01/29