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target/ppc: trigger PERFM EBBs from power8-pmu.c

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This patch adds the EBB exception support that are triggered by
Performance Monitor alerts. This happens when a Performance Monitor
alert occurs and MMCR0_EBE, BESCR_PME and BESCR_GE are set.

fire_PMC_interrupt() will execute the raise_ebb_perfm_exception() helper
which will check for MMCR0_EBE, BESCR_PME and BESCR_GE bits. If all bits
are set, do_ebb() will attempt to trigger a PERFM EBB event.

If the EBB facility is enabled in both FSCR and HFSCR we consider that
the EBB is valid and set BESCR_PMEO. After that, if we're running in
problem state, fire a POWERPC_EXCP_PERM_EBB immediately. Otherwise we'll
queue a PPC_INTERRUPT_EBB.

Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220225101140.1054160-5-danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
This commit is contained in:
Daniel Henrique Barboza 2022-03-02 06:51:36 +01:00 • committed by Cédric Le Goater
parent cb76bbc43f
commit d3412df20a
3 changed files with 54 additions and 2 deletions
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5
target/ppc/cpu.h
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@ -2502,6 +2502,11 @@ void QEMU_NORETURN raise_exception_err(CPUPPCState *env, uint32_t exception,
void QEMU_NORETURN raise_exception_err_ra(CPUPPCState *env, uint32_t exception,
uint32_t error_code, uintptr_t raddr);
/* PERFM EBB helper*/
#if defined(TARGET_PPC64) && !defined(CONFIG_USER_ONLY)
void raise_ebb_perfm_exception(CPUPPCState *env);
#endif
#if !defined(CONFIG_USER_ONLY)
static inline int booke206_tlbm_id(CPUPPCState *env, ppcmas_tlb_t *tlbm)
{