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authorAlexey Kardashevskiy <aik@ozlabs.ru>2014-02-02 01:45:51 +1100
committerAlexander Graf <agraf@suse.de>2014-03-05 03:07:03 +0100
commit0ce470cd4ca88e84e547a3b95159d23ce6be419e (patch)
treefae0578c41afbe617101c39c437650c1db30dcb6
parenta0fcac9c21dcbf481eeb5573a738f55023f5a953 (diff)
downloadqemu-arm-0ce470cd4ca88e84e547a3b95159d23ce6be419e.tar.gz
target-ppc: add PowerPCCPU::cpu_dt_id
Normally CPUState::cpu_index is used to pick the right CPU for various operations. However default consecutive numbering does not always work for POWERPC. These indexes are reflected in /proc/device-tree/cpus/PowerPC,POWER7@XX and used to call KVM VCPU's ioctls. In order to achieve this, kvmppc_fixup_cpu() was introduced. Roughly speaking, it multiplies cpu_index by the number of threads per core. This approach has disadvantages such as: 1. NUMA configuration stays broken after the fixup; 2. CPU-targeted commands from the QEMU Monitor do not work properly as CPU indexes have been fixed and there is no clear way for the user to know what the new CPU indexes are. This introduces a @cpu_dt_id field in the CPUPPCState struct which is initialized from @cpu_index by default and can be fixed later to meet the device tree requirements. This adds an API to handle @cpu_dt_id. This removes kvmppc_fixup_cpu() as it is not more needed, @cpu_dt_id is calculated in ppc_cpu_realize(). This will be used later in machine code. Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Acked-by: Mike Day <ncmike@ncultra.org> Signed-off-by: Alexander Graf <agraf@suse.de>
-rw-r--r--hw/ppc/ppc.c22
-rw-r--r--target-ppc/cpu-qom.h2
-rw-r--r--target-ppc/cpu.h18
-rw-r--r--target-ppc/kvm.c13
-rw-r--r--target-ppc/kvm_ppc.h6
-rw-r--r--target-ppc/translate_init.c10
6 files changed, 46 insertions, 25 deletions
diff --git a/hw/ppc/ppc.c b/hw/ppc/ppc.c
index 114be64480..0e82719b69 100644
--- a/hw/ppc/ppc.c
+++ b/hw/ppc/ppc.c
@@ -26,6 +26,7 @@
#include "hw/ppc/ppc_e500.h"
#include "qemu/timer.h"
#include "sysemu/sysemu.h"
+#include "sysemu/cpus.h"
#include "hw/timer/m48t59.h"
#include "qemu/log.h"
#include "hw/loader.h"
@@ -1362,3 +1363,24 @@ int PPC_NVRAM_set_params (nvram_t *nvram, uint16_t NVRAM_size,
return 0;
}
+
+/* CPU device-tree ID helpers */
+int ppc_get_vcpu_dt_id(PowerPCCPU *cpu)
+{
+ return cpu->cpu_dt_id;
+}
+
+PowerPCCPU *ppc_get_vcpu_by_dt_id(int cpu_dt_id)
+{
+ CPUState *cs;
+
+ CPU_FOREACH(cs) {
+ PowerPCCPU *cpu = POWERPC_CPU(cs);
+
+ if (cpu->cpu_dt_id == cpu_dt_id) {
+ return cpu;
+ }
+ }
+
+ return NULL;
+}
diff --git a/target-ppc/cpu-qom.h b/target-ppc/cpu-qom.h
index 72b22329b0..b17c024543 100644
--- a/target-ppc/cpu-qom.h
+++ b/target-ppc/cpu-qom.h
@@ -79,6 +79,7 @@ typedef struct PowerPCCPUClass {
/**
* PowerPCCPU:
* @env: #CPUPPCState
+ * @cpu_dt_id: CPU index used in the device tree. KVM uses this index too
*
* A PowerPC CPU.
*/
@@ -88,6 +89,7 @@ typedef struct PowerPCCPU {
/*< public >*/
CPUPPCState env;
+ int cpu_dt_id;
} PowerPCCPU;
static inline PowerPCCPU *ppc_env_get_cpu(CPUPPCState *env)
diff --git a/target-ppc/cpu.h b/target-ppc/cpu.h
index 44ade0c173..afab267485 100644
--- a/target-ppc/cpu.h
+++ b/target-ppc/cpu.h
@@ -2183,4 +2183,22 @@ static inline bool cpu_has_work(CPUState *cpu)
void dump_mmu(FILE *f, fprintf_function cpu_fprintf, CPUPPCState *env);
+/**
+ * ppc_get_vcpu_dt_id:
+ * @cs: a PowerPCCPU struct.
+ *
+ * Returns a device-tree ID for a CPU.
+ */
+int ppc_get_vcpu_dt_id(PowerPCCPU *cpu);
+
+/**
+ * ppc_get_vcpu_by_dt_id:
+ * @cpu_dt_id: a device tree id
+ *
+ * Searches for a CPU by @cpu_dt_id.
+ *
+ * Returns: a PowerPCCPU struct
+ */
+PowerPCCPU *ppc_get_vcpu_by_dt_id(int cpu_dt_id);
+
#endif /* !defined (__CPU_PPC_H__) */
diff --git a/target-ppc/kvm.c b/target-ppc/kvm.c
index b5fff70f09..a483322868 100644
--- a/target-ppc/kvm.c
+++ b/target-ppc/kvm.c
@@ -1770,19 +1770,6 @@ static void kvmppc_host_cpu_class_init(ObjectClass *oc, void *data)
}
}
-int kvmppc_fixup_cpu(PowerPCCPU *cpu)
-{
- CPUState *cs = CPU(cpu);
- int smt;
-
- /* Adjust cpu index for SMT */
- smt = kvmppc_smt_threads();
- cs->cpu_index = (cs->cpu_index / smp_threads) * smt
- + (cs->cpu_index % smp_threads);
-
- return 0;
-}
-
bool kvmppc_has_cap_epr(void)
{
return cap_epr;
diff --git a/target-ppc/kvm_ppc.h b/target-ppc/kvm_ppc.h
index a65d345719..ff077ec502 100644
--- a/target-ppc/kvm_ppc.h
+++ b/target-ppc/kvm_ppc.h
@@ -36,7 +36,6 @@ int kvmppc_remove_spapr_tce(void *table, int pfd, uint32_t window_size);
int kvmppc_reset_htab(int shift_hint);
uint64_t kvmppc_rma_size(uint64_t current_size, unsigned int hash_shift);
#endif /* !CONFIG_USER_ONLY */
-int kvmppc_fixup_cpu(PowerPCCPU *cpu);
bool kvmppc_has_cap_epr(void);
int kvmppc_define_rtas_kernel_token(uint32_t token, const char *function);
bool kvmppc_has_cap_htab_fd(void);
@@ -161,11 +160,6 @@ static inline int kvmppc_update_sdr1(CPUPPCState *env)
#endif /* !CONFIG_USER_ONLY */
-static inline int kvmppc_fixup_cpu(PowerPCCPU *cpu)
-{
- return -1;
-}
-
static inline bool kvmppc_has_cap_epr(void)
{
return false;
diff --git a/target-ppc/translate_init.c b/target-ppc/translate_init.c
index 9dd8c1cdb8..ef74d94089 100644
--- a/target-ppc/translate_init.c
+++ b/target-ppc/translate_init.c
@@ -7847,14 +7847,12 @@ static void ppc_cpu_realizefn(DeviceState *dev, Error **errp)
max_smt, kvm_enabled() ? "KVM" : "TCG");
return;
}
+
+ cpu->cpu_dt_id = (cs->cpu_index / smp_threads) * max_smt
+ + (cs->cpu_index % smp_threads);
#endif
- if (kvm_enabled()) {
- if (kvmppc_fixup_cpu(cpu) != 0) {
- error_setg(errp, "Unable to virtualize selected CPU with KVM");
- return;
- }
- } else if (tcg_enabled()) {
+ if (tcg_enabled()) {
if (ppc_fixup_cpu(cpu) != 0) {
error_setg(errp, "Unable to emulate selected CPU with TCG");
return;