From f7a7b6525c5b5f06553582d8617052bf43678984 Mon Sep 17 00:00:00 2001 From: Richard Henderson Date: Mon, 15 Mar 2021 12:46:03 -0600 Subject: target/ppc: Retain hflags_nmsr only for migration MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit We have eliminated all normal uses of hflags_nmsr. We need not even compute it except when we want to migrate. Rename the field to emphasize this. Remove the fixme comment for migrating access_type. This value is only ever used with the current executing instruction, and is never live when the cpu is halted for migration. Signed-off-by: Richard Henderson Message-Id: <20210315184615.1985590-6-richard.henderson@linaro.org> Reviewed-by: Cédric Le Goater Signed-off-by: David Gibson --- target/ppc/cpu.h | 4 ++-- target/ppc/helper_regs.c | 2 -- target/ppc/machine.c | 9 ++++++--- 3 files changed, 8 insertions(+), 7 deletions(-) diff --git a/target/ppc/cpu.h b/target/ppc/cpu.h index 061d2eed1b..79c4033a42 100644 --- a/target/ppc/cpu.h +++ b/target/ppc/cpu.h @@ -1105,8 +1105,8 @@ struct CPUPPCState { #endif /* These resources are used only in QEMU core */ - target_ulong hflags; /* hflags is MSR & HFLAGS_MASK */ - target_ulong hflags_nmsr; /* specific hflags, not coming from MSR */ + target_ulong hflags; + target_ulong hflags_compat_nmsr; /* for migration compatibility */ int immu_idx; /* precomputed MMU index to speed up insn accesses */ int dmmu_idx; /* precomputed MMU index to speed up data accesses */ diff --git a/target/ppc/helper_regs.c b/target/ppc/helper_regs.c index 95b9aca61f..a87e354ca2 100644 --- a/target/ppc/helper_regs.c +++ b/target/ppc/helper_regs.c @@ -104,8 +104,6 @@ void hreg_compute_hflags(CPUPPCState *env) */ uint32_t le = extract32(env->spr[SPR_HID0], 3, 1); env->hflags |= le << MSR_LE; - /* Retain for backward compatibility with migration. */ - env->hflags_nmsr = le << MSR_LE; } } diff --git a/target/ppc/machine.c b/target/ppc/machine.c index f6eeda9642..1f7a353c78 100644 --- a/target/ppc/machine.c +++ b/target/ppc/machine.c @@ -310,6 +310,10 @@ static int cpu_pre_save(void *opaque) } } + /* Retain migration compatibility for pre 6.0 for 601 machines. */ + env->hflags_compat_nmsr = (env->flags & POWERPC_FLAG_HID0_LE + ? env->hflags & MSR_LE : 0); + return 0; } @@ -829,9 +833,8 @@ const VMStateDescription vmstate_ppc_cpu = { /* Supervisor mode architected state */ VMSTATE_UINTTL(env.msr, PowerPCCPU), - /* Internal state */ - VMSTATE_UINTTL(env.hflags_nmsr, PowerPCCPU), - /* FIXME: access_type? */ + /* Backward compatible internal state */ + VMSTATE_UINTTL(env.hflags_compat_nmsr, PowerPCCPU), /* Sanity checking */ VMSTATE_UINTTL_TEST(mig_msr_mask, PowerPCCPU, cpu_pre_2_8_migration), -- cgit v1.2.3