From ad5d1add86b9560c22c3fb8718d6a99eabaaed6a Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= Date: Wed, 29 Mar 2017 15:53:23 +0200 Subject: [PATCH] ppc/xics: introduce an 'intc' backlink under PowerPCCPU MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Today, the ICPState array of the sPAPR machine is indexed with 'cpu_index' of the CPUState. This numbering of CPUs is internal to QEMU and the guest only knows about what is exposed in the device tree, that is the 'cpu_dt_id'. This is why sPAPR uses the helper xics_get_cpu_index_by_dt_id() to do the mapping in a couple of places. To provide a more generic XICS layer, we need to abstract the IRQ 'server' number and remove any assumption made on its nature. It should not be used as a 'cpu_index' for lookups like xics_cpu_setup() and xics_cpu_destroy() do. To reach that goal, we choose to introduce a generic 'intc' backlink under PowerPCCPU, and let the machine core init routine do the ICPState lookup. The resulting object is passed on to xics_cpu_setup() which does the store under PowerPCCPU. The IRQ 'server' number in XICS is now generic. sPAPR uses 'cpu_dt_id' and PowerNV will use 'PIR' number. This also has the benefit of simplifying the sPAPR hcall routines which do not need to do any ICPState lookups anymore. Signed-off-by: Cédric Le Goater Signed-off-by: David Gibson --- hw/intc/xics.c | 6 +++--- hw/intc/xics_spapr.c | 20 +++++--------------- hw/ppc/spapr_cpu_core.c | 4 +++- include/hw/ppc/xics.h | 2 +- target/ppc/cpu.h | 1 + 5 files changed, 13 insertions(+), 20 deletions(-) diff --git a/hw/intc/xics.c b/hw/intc/xics.c index e740989a11..56fe70cd10 100644 --- a/hw/intc/xics.c +++ b/hw/intc/xics.c @@ -52,7 +52,7 @@ int xics_get_cpu_index_by_dt_id(int cpu_dt_id) void xics_cpu_destroy(XICSFabric *xi, PowerPCCPU *cpu) { CPUState *cs = CPU(cpu); - ICPState *icp = xics_icp_get(xi, cs->cpu_index); + ICPState *icp = ICP(cpu->intc); assert(icp); assert(cs == icp->cs); @@ -61,15 +61,15 @@ void xics_cpu_destroy(XICSFabric *xi, PowerPCCPU *cpu) icp->cs = NULL; } -void xics_cpu_setup(XICSFabric *xi, PowerPCCPU *cpu) +void xics_cpu_setup(XICSFabric *xi, PowerPCCPU *cpu, ICPState *icp) { CPUState *cs = CPU(cpu); CPUPPCState *env = &cpu->env; - ICPState *icp = xics_icp_get(xi, cs->cpu_index); ICPStateClass *icpc; assert(icp); + cpu->intc = OBJECT(icp); icp->cs = cs; icpc = ICP_GET_CLASS(icp); diff --git a/hw/intc/xics_spapr.c b/hw/intc/xics_spapr.c index 84d24b2837..58f100d379 100644 --- a/hw/intc/xics_spapr.c +++ b/hw/intc/xics_spapr.c @@ -43,11 +43,9 @@ static target_ulong h_cppr(PowerPCCPU *cpu, sPAPRMachineState *spapr, target_ulong opcode, target_ulong *args) { - CPUState *cs = CPU(cpu); - ICPState *icp = xics_icp_get(XICS_FABRIC(spapr), cs->cpu_index); target_ulong cppr = args[0]; - icp_set_cppr(icp, cppr); + icp_set_cppr(ICP(cpu->intc), cppr); return H_SUCCESS; } @@ -69,9 +67,7 @@ static target_ulong h_ipi(PowerPCCPU *cpu, sPAPRMachineState *spapr, static target_ulong h_xirr(PowerPCCPU *cpu, sPAPRMachineState *spapr, target_ulong opcode, target_ulong *args) { - CPUState *cs = CPU(cpu); - ICPState *icp = xics_icp_get(XICS_FABRIC(spapr), cs->cpu_index); - uint32_t xirr = icp_accept(icp); + uint32_t xirr = icp_accept(ICP(cpu->intc)); args[0] = xirr; return H_SUCCESS; @@ -80,9 +76,7 @@ static target_ulong h_xirr(PowerPCCPU *cpu, sPAPRMachineState *spapr, static target_ulong h_xirr_x(PowerPCCPU *cpu, sPAPRMachineState *spapr, target_ulong opcode, target_ulong *args) { - CPUState *cs = CPU(cpu); - ICPState *icp = xics_icp_get(XICS_FABRIC(spapr), cs->cpu_index); - uint32_t xirr = icp_accept(icp); + uint32_t xirr = icp_accept(ICP(cpu->intc)); args[0] = xirr; args[1] = cpu_get_host_ticks(); @@ -92,21 +86,17 @@ static target_ulong h_xirr_x(PowerPCCPU *cpu, sPAPRMachineState *spapr, static target_ulong h_eoi(PowerPCCPU *cpu, sPAPRMachineState *spapr, target_ulong opcode, target_ulong *args) { - CPUState *cs = CPU(cpu); - ICPState *icp = xics_icp_get(XICS_FABRIC(spapr), cs->cpu_index); target_ulong xirr = args[0]; - icp_eoi(icp, xirr); + icp_eoi(ICP(cpu->intc), xirr); return H_SUCCESS; } static target_ulong h_ipoll(PowerPCCPU *cpu, sPAPRMachineState *spapr, target_ulong opcode, target_ulong *args) { - CPUState *cs = CPU(cpu); - ICPState *icp = xics_icp_get(XICS_FABRIC(spapr), cs->cpu_index); uint32_t mfrr; - uint32_t xirr = icp_ipoll(icp, &mfrr); + uint32_t xirr = icp_ipoll(ICP(cpu->intc), &mfrr); args[0] = xirr; args[1] = mfrr; diff --git a/hw/ppc/spapr_cpu_core.c b/hw/ppc/spapr_cpu_core.c index 6883f0991a..7db61bd724 100644 --- a/hw/ppc/spapr_cpu_core.c +++ b/hw/ppc/spapr_cpu_core.c @@ -63,6 +63,8 @@ static void spapr_cpu_init(sPAPRMachineState *spapr, PowerPCCPU *cpu, Error **errp) { CPUPPCState *env = &cpu->env; + XICSFabric *xi = XICS_FABRIC(spapr); + ICPState *icp = xics_icp_get(xi, CPU(cpu)->cpu_index); /* Set time-base frequency to 512 MHz */ cpu_ppc_tb_init(env, SPAPR_TIMEBASE_FREQ); @@ -80,7 +82,7 @@ static void spapr_cpu_init(sPAPRMachineState *spapr, PowerPCCPU *cpu, } } - xics_cpu_setup(XICS_FABRIC(spapr), cpu); + xics_cpu_setup(xi, cpu, icp); qemu_register_reset(spapr_cpu_reset, cpu); spapr_cpu_reset(cpu); diff --git a/include/hw/ppc/xics.h b/include/hw/ppc/xics.h index ce230183a1..b97d30bbc6 100644 --- a/include/hw/ppc/xics.h +++ b/include/hw/ppc/xics.h @@ -168,7 +168,7 @@ void spapr_dt_xics(int nr_servers, void *fdt, uint32_t phandle); qemu_irq xics_get_qirq(XICSFabric *xi, int irq); ICPState *xics_icp_get(XICSFabric *xi, int server); -void xics_cpu_setup(XICSFabric *xi, PowerPCCPU *cpu); +void xics_cpu_setup(XICSFabric *xi, PowerPCCPU *cpu, ICPState *icp); void xics_cpu_destroy(XICSFabric *xi, PowerPCCPU *cpu); /* Internal XICS interfaces */ diff --git a/target/ppc/cpu.h b/target/ppc/cpu.h index cacdd0a750..e0ff0412d6 100644 --- a/target/ppc/cpu.h +++ b/target/ppc/cpu.h @@ -1200,6 +1200,7 @@ struct PowerPCCPU { uint32_t max_compat; uint32_t compat_pvr; PPCVirtualHypervisor *vhyp; + Object *intc; /* Fields related to migration compatibility hacks */ bool pre_2_8_migration;