From ad99d04c76debb0d60c0bbb5d4f6ebb3509ddc91 Mon Sep 17 00:00:00 2001 From: David Gibson Date: Thu, 14 Jun 2018 16:33:58 +1000 Subject: target/ppc: Allow cpu compatiblity checks based on type, not instance MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit ppc_check_compat() is used in a number of places to check if a cpu object supports a certain compatiblity mode, subject to various constraints. It takes a PowerPCCPU *, however it really only depends on the cpu's class. We have upcoming cases where it would be useful to make compatibility checks before we fully instantiate the cpu objects. ppc_type_check_compat() will now make an equivalent check, but based on a CPU's QOM typename instead of an instantiated CPU object. We make use of the new interface in several places in spapr, where we're essentially making a global check, rather than one specific to a particular cpu. This avoids some ugly uses of first_cpu to grab a "representative" instance. Signed-off-by: David Gibson Reviewed-by: Greg Kurz Reviewed-by: Cédric Le Goater --- hw/ppc/spapr.c | 10 ++++------ hw/ppc/spapr_caps.c | 19 +++++++++---------- 2 files changed, 13 insertions(+), 16 deletions(-) (limited to 'hw') diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c index 3174468..bc179f6 100644 --- a/hw/ppc/spapr.c +++ b/hw/ppc/spapr.c @@ -1616,8 +1616,8 @@ static void spapr_machine_reset(void) first_ppc_cpu = POWERPC_CPU(first_cpu); if (kvm_enabled() && kvmppc_has_cap_mmu_radix() && - ppc_check_compat(first_ppc_cpu, CPU_POWERPC_LOGICAL_3_00, 0, - spapr->max_compat_pvr)) { + ppc_type_check_compat(machine->cpu_type, CPU_POWERPC_LOGICAL_3_00, 0, + spapr->max_compat_pvr)) { /* If using KVM with radix mode available, VCPUs can be started * without a HPT because KVM will start them in radix mode. * Set the GR bit in PATB so that we know there is no HPT. */ @@ -2520,7 +2520,6 @@ static void spapr_machine_init(MachineState *machine) long load_limit, fw_size; char *filename; Error *resize_hpt_err = NULL; - PowerPCCPU *first_ppc_cpu; msi_nonbroken = true; @@ -2618,10 +2617,9 @@ static void spapr_machine_init(MachineState *machine) /* init CPUs */ spapr_init_cpus(spapr); - first_ppc_cpu = POWERPC_CPU(first_cpu); if ((!kvm_enabled() || kvmppc_has_cap_mmu_radix()) && - ppc_check_compat(first_ppc_cpu, CPU_POWERPC_LOGICAL_3_00, 0, - spapr->max_compat_pvr)) { + ppc_type_check_compat(machine->cpu_type, CPU_POWERPC_LOGICAL_3_00, 0, + spapr->max_compat_pvr)) { /* KVM and TCG always allow GTSE with radix... */ spapr_ovec_set(spapr->ov5, OV5_MMU_RADIX_GTSE); } diff --git a/hw/ppc/spapr_caps.c b/hw/ppc/spapr_caps.c index 00e43a9..469f38f 100644 --- a/hw/ppc/spapr_caps.c +++ b/hw/ppc/spapr_caps.c @@ -327,27 +327,26 @@ sPAPRCapabilityInfo capability_table[SPAPR_CAP_NUM] = { }; static sPAPRCapabilities default_caps_with_cpu(sPAPRMachineState *spapr, - CPUState *cs) + const char *cputype) { sPAPRMachineClass *smc = SPAPR_MACHINE_GET_CLASS(spapr); - PowerPCCPU *cpu = POWERPC_CPU(cs); sPAPRCapabilities caps; caps = smc->default_caps; - if (!ppc_check_compat(cpu, CPU_POWERPC_LOGICAL_2_07, - 0, spapr->max_compat_pvr)) { + if (!ppc_type_check_compat(cputype, CPU_POWERPC_LOGICAL_2_07, + 0, spapr->max_compat_pvr)) { caps.caps[SPAPR_CAP_HTM] = SPAPR_CAP_OFF; caps.caps[SPAPR_CAP_CFPC] = SPAPR_CAP_BROKEN; } - if (!ppc_check_compat(cpu, CPU_POWERPC_LOGICAL_2_06_PLUS, - 0, spapr->max_compat_pvr)) { + if (!ppc_type_check_compat(cputype, CPU_POWERPC_LOGICAL_2_06_PLUS, + 0, spapr->max_compat_pvr)) { caps.caps[SPAPR_CAP_SBBC] = SPAPR_CAP_BROKEN; } - if (!ppc_check_compat(cpu, CPU_POWERPC_LOGICAL_2_06, - 0, spapr->max_compat_pvr)) { + if (!ppc_type_check_compat(cputype, CPU_POWERPC_LOGICAL_2_06, + 0, spapr->max_compat_pvr)) { caps.caps[SPAPR_CAP_VSX] = SPAPR_CAP_OFF; caps.caps[SPAPR_CAP_DFP] = SPAPR_CAP_OFF; caps.caps[SPAPR_CAP_IBS] = SPAPR_CAP_BROKEN; @@ -384,7 +383,7 @@ int spapr_caps_post_migration(sPAPRMachineState *spapr) sPAPRCapabilities dstcaps = spapr->eff; sPAPRCapabilities srccaps; - srccaps = default_caps_with_cpu(spapr, first_cpu); + srccaps = default_caps_with_cpu(spapr, MACHINE(spapr)->cpu_type); for (i = 0; i < SPAPR_CAP_NUM; i++) { /* If not default value then assume came in with the migration */ if (spapr->mig.caps[i] != spapr->def.caps[i]) { @@ -446,7 +445,7 @@ void spapr_caps_reset(sPAPRMachineState *spapr) int i; /* First compute the actual set of caps we're running with.. */ - default_caps = default_caps_with_cpu(spapr, first_cpu); + default_caps = default_caps_with_cpu(spapr, MACHINE(spapr)->cpu_type); for (i = 0; i < SPAPR_CAP_NUM; i++) { /* Store the defaults */ -- cgit v1.1