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ppc/spapr: Fix FWNMI machine check interrupt delivery 

FWNMI machine check delivery misses a few things that will make it fail
with TCG at least (which we would like to allow in future to improve
testing).

It's not nice to scatter interrupt delivery logic around the tree, so
move it to excp_helper.c and share code where possible.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Message-Id: <20200316142613.121089-5-npiggin@gmail.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Nicholas Piggin 2020-03-17 00:26:09 +10:00 committed by David Gibson
parent edfdbf9c6b
commit ad77c6ca0c
3 changed files with 57 additions and 42 deletions
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24
hw/ppc/spapr_events.c
View File

@ -785,28 +785,13 @@ static uint32_t spapr_mce_get_elog_type(PowerPCCPU *cpu, bool recovered,
static void spapr_mce_dispatch_elog(PowerPCCPU *cpu, bool recovered)
{
SpaprMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
uint64_t rtas_addr;
CPUState *cs = CPU(cpu);
CPUPPCState *env = &cpu->env;
PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu);
target_ulong msr = 0;
uint64_t rtas_addr;
struct rtas_error_log log;
struct mc_extended_log *ext_elog;
uint32_t summary;
/*
* Properly set bits in MSR before we invoke the handler.
* SRR0/1, DAR and DSISR are properly set by KVM
*/
if (!(*pcc->interrupts_big_endian)(cpu)) {
msr |= (1ULL << MSR_LE);
}
if (env->msr & (1ULL << MSR_SF)) {
msr |= (1ULL << MSR_SF);
}
msr |= (1ULL << MSR_ME);
ext_elog = g_malloc0(sizeof(*ext_elog));
summary = spapr_mce_get_elog_type(cpu, recovered, ext_elog);
@ -834,12 +819,11 @@ static void spapr_mce_dispatch_elog(PowerPCCPU *cpu, bool recovered)
cpu_physical_memory_write(rtas_addr + RTAS_ERROR_LOG_OFFSET +
sizeof(env->gpr[3]) + sizeof(log), ext_elog,
sizeof(*ext_elog));
g_free(ext_elog);
env->gpr[3] = rtas_addr + RTAS_ERROR_LOG_OFFSET;
env->msr = msr;
env->nip = spapr->fwnmi_machine_check_addr;
g_free(ext_elog);
ppc_cpu_do_fwnmi_machine_check(cs, spapr->fwnmi_machine_check_addr);
}
void spapr_mce_req_event(PowerPCCPU *cpu, bool recovered)

1
target/ppc/cpu.h
View File

@ -1221,6 +1221,7 @@ int ppc32_cpu_write_elf32_note(WriteCoreDumpFunction f, CPUState *cs,
int cpuid, void *opaque);
#ifndef CONFIG_USER_ONLY
void ppc_cpu_do_system_reset(CPUState *cs);
void ppc_cpu_do_fwnmi_machine_check(CPUState *cs, target_ulong vector);
extern const VMStateDescription vmstate_ppc_cpu;
#endif

74
target/ppc/excp_helper.c
View File

@ -128,6 +128,37 @@ static uint64_t ppc_excp_vector_offset(CPUState *cs, int ail)
return offset;
}
static inline void powerpc_set_excp_state(PowerPCCPU *cpu,
target_ulong vector, target_ulong msr)
{
CPUState *cs = CPU(cpu);
CPUPPCState *env = &cpu->env;
/*
* We don't use hreg_store_msr here as already have treated any
* special case that could occur. Just store MSR and update hflags
*
* Note: We *MUST* not use hreg_store_msr() as-is anyway because it
* will prevent setting of the HV bit which some exceptions might need
* to do.
*/
env->msr = msr & env->msr_mask;
hreg_compute_hflags(env);
env->nip = vector;
/* Reset exception state */
cs->exception_index = POWERPC_EXCP_NONE;
env->error_code = 0;
/* Reset the reservation */
env->reserve_addr = -1;
/*
* Any interrupt is context synchronizing, check if TCG TLB needs
* a delayed flush on ppc64
*/
check_tlb_flush(env, false);
}
/*
* Note that this function should be greatly optimized when called
* with a constant excp, from ppc_hw_interrupt
@ -768,29 +799,8 @@ static inline void powerpc_excp(PowerPCCPU *cpu, int excp_model, int excp)
}
}
#endif
/*
* We don't use hreg_store_msr here as already have treated any
* special case that could occur. Just store MSR and update hflags
*
* Note: We *MUST* not use hreg_store_msr() as-is anyway because it
* will prevent setting of the HV bit which some exceptions might need
* to do.
*/
env->msr = new_msr & env->msr_mask;
hreg_compute_hflags(env);
env->nip = vector;
/* Reset exception state */
cs->exception_index = POWERPC_EXCP_NONE;
env->error_code = 0;
/* Reset the reservation */
env->reserve_addr = -1;
/*
* Any interrupt is context synchronizing, check if TCG TLB needs
* a delayed flush on ppc64
*/
check_tlb_flush(env, false);
powerpc_set_excp_state(cpu, vector, new_msr);
}
void ppc_cpu_do_interrupt(CPUState *cs)
@ -958,6 +968,26 @@ void ppc_cpu_do_system_reset(CPUState *cs)
powerpc_excp(cpu, env->excp_model, POWERPC_EXCP_RESET);
}
void ppc_cpu_do_fwnmi_machine_check(CPUState *cs, target_ulong vector)
{
PowerPCCPU *cpu = POWERPC_CPU(cs);
CPUPPCState *env = &cpu->env;
PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu);
target_ulong msr = 0;
/*
* Set MSR and NIP for the handler, SRR0/1, DAR and DSISR have already
* been set by KVM.
*/
msr = (1ULL << MSR_ME);
msr |= env->msr & (1ULL << MSR_SF);
if (!(*pcc->interrupts_big_endian)(cpu)) {
msr |= (1ULL << MSR_LE);
}
powerpc_set_excp_state(cpu, vector, msr);
}
#endif /* !CONFIG_USER_ONLY */
bool ppc_cpu_exec_interrupt(CPUState *cs, int interrupt_request)