diff options
| -rw-r--r-- | arch/mips/include/asm/kvm_host.h | 3 | ||||
| -rw-r--r-- | arch/mips/include/uapi/asm/inst.h | 11 | ||||
| -rw-r--r-- | arch/mips/kvm/mips.c | 1 | ||||
| -rw-r--r-- | arch/mips/kvm/vz.c | 77 |
4 files changed, 92 insertions, 0 deletions
diff --git a/arch/mips/include/asm/kvm_host.h b/arch/mips/include/asm/kvm_host.h index c4e6b1e954f5..9f3bfc8b363d 100644 --- a/arch/mips/include/asm/kvm_host.h +++ b/arch/mips/include/asm/kvm_host.h @@ -173,6 +173,9 @@ struct kvm_vcpu_stat { u64 vz_ghfc_exits; u64 vz_gpa_exits; u64 vz_resvd_exits; +#ifdef CONFIG_CPU_LOONGSON64 + u64 vz_cpucfg_exits; +#endif #endif u64 halt_successful_poll; u64 halt_attempted_poll; diff --git a/arch/mips/include/uapi/asm/inst.h b/arch/mips/include/uapi/asm/inst.h index 98f97c85e059..43d1faa02933 100644 --- a/arch/mips/include/uapi/asm/inst.h +++ b/arch/mips/include/uapi/asm/inst.h @@ -1012,6 +1012,16 @@ struct loongson3_lsdc2_format { /* Loongson-3 overridden ldc2/sdc2 Load/Store fo ;)))))) }; +struct loongson3_lscsr_format { /* Loongson-3 CPUCFG&CSR read/write format */ + __BITFIELD_FIELD(unsigned int opcode : 6, + __BITFIELD_FIELD(unsigned int rs : 5, + __BITFIELD_FIELD(unsigned int fr : 5, + __BITFIELD_FIELD(unsigned int rd : 5, + __BITFIELD_FIELD(unsigned int fd : 5, + __BITFIELD_FIELD(unsigned int func : 6, + ;)))))) +}; + /* * MIPS16e instruction formats (16-bit length) */ @@ -1114,6 +1124,7 @@ union mips_instruction { struct mm16_r5_format mm16_r5_format; struct loongson3_lswc2_format loongson3_lswc2_format; struct loongson3_lsdc2_format loongson3_lsdc2_format; + struct loongson3_lscsr_format loongson3_lscsr_format; }; union mips16e_instruction { diff --git a/arch/mips/kvm/mips.c b/arch/mips/kvm/mips.c index e4d42e03ec37..f62667bb54f3 100644 --- a/arch/mips/kvm/mips.c +++ b/arch/mips/kvm/mips.c @@ -67,6 +67,7 @@ struct kvm_stats_debugfs_item debugfs_entries[] = { VCPU_STAT("vz_ghfc", vz_ghfc_exits), VCPU_STAT("vz_gpa", vz_gpa_exits), VCPU_STAT("vz_resvd", vz_resvd_exits), + VCPU_STAT("vz_cpucfg", vz_cpucfg_exits), #endif VCPU_STAT("halt_successful_poll", halt_successful_poll), VCPU_STAT("halt_attempted_poll", halt_attempted_poll), diff --git a/arch/mips/kvm/vz.c b/arch/mips/kvm/vz.c index 45be0b7bc090..c09e8f13b256 100644 --- a/arch/mips/kvm/vz.c +++ b/arch/mips/kvm/vz.c @@ -29,6 +29,7 @@ #include <linux/kvm_host.h> #include "interrupt.h" +#include "loongson_regs.h" #include "trace.h" @@ -1092,6 +1093,77 @@ static enum emulation_result kvm_vz_gpsi_cache(union mips_instruction inst, return EMULATE_FAIL; } +#ifdef CONFIG_CPU_LOONGSON64 +static enum emulation_result kvm_vz_gpsi_lwc2(union mips_instruction inst, + u32 *opc, u32 cause, + struct kvm_run *run, + struct kvm_vcpu *vcpu) +{ + unsigned int rs, rd; + unsigned int hostcfg; + unsigned long curr_pc; + enum emulation_result er = EMULATE_DONE; + + /* + * Update PC and hold onto current PC in case there is + * an error and we want to rollback the PC + */ + curr_pc = vcpu->arch.pc; + er = update_pc(vcpu, cause); + if (er == EMULATE_FAIL) + return er; + + rs = inst.loongson3_lscsr_format.rs; + rd = inst.loongson3_lscsr_format.rd; + switch (inst.loongson3_lscsr_format.fr) { + case 0x8: /* Read CPUCFG */ + ++vcpu->stat.vz_cpucfg_exits; + hostcfg = read_cpucfg(vcpu->arch.gprs[rs]); + + switch (vcpu->arch.gprs[rs]) { + case LOONGSON_CFG0: + vcpu->arch.gprs[rd] = 0x14c000; + break; + case LOONGSON_CFG1: + hostcfg &= (LOONGSON_CFG1_FP | LOONGSON_CFG1_MMI | + LOONGSON_CFG1_MSA1 | LOONGSON_CFG1_MSA2 | + LOONGSON_CFG1_SFBP); + vcpu->arch.gprs[rd] = hostcfg; + break; + case LOONGSON_CFG2: + hostcfg &= (LOONGSON_CFG2_LEXT1 | LOONGSON_CFG2_LEXT2 | + LOONGSON_CFG2_LEXT3 | LOONGSON_CFG2_LSPW); + vcpu->arch.gprs[rd] = hostcfg; + break; + case LOONGSON_CFG3: + vcpu->arch.gprs[rd] = hostcfg; + break; + default: + /* Don't export any other advanced features to guest */ + vcpu->arch.gprs[rd] = 0; + break; + } + break; + + default: + kvm_err("lwc2 emulate not impl %d rs %lx @%lx\n", + inst.loongson3_lscsr_format.fr, vcpu->arch.gprs[rs], curr_pc); + er = EMULATE_FAIL; + break; + } + + /* Rollback PC only if emulation was unsuccessful */ + if (er == EMULATE_FAIL) { + kvm_err("[%#lx]%s: unsupported lwc2 instruction 0x%08x 0x%08x\n", + curr_pc, __func__, inst.word, inst.loongson3_lscsr_format.fr); + + vcpu->arch.pc = curr_pc; + } + + return er; +} +#endif + static enum emulation_result kvm_trap_vz_handle_gpsi(u32 cause, u32 *opc, struct kvm_vcpu *vcpu) { @@ -1121,6 +1193,11 @@ static enum emulation_result kvm_trap_vz_handle_gpsi(u32 cause, u32 *opc, er = kvm_vz_gpsi_cache(inst, opc, cause, run, vcpu); break; #endif +#ifdef CONFIG_CPU_LOONGSON64 + case lwc2_op: + er = kvm_vz_gpsi_lwc2(inst, opc, cause, run, vcpu); + break; +#endif case spec3_op: switch (inst.spec3_format.func) { #ifdef CONFIG_CPU_MIPSR6 |