#include "sysemu.h" #include "cpu.h" #include "dyngen-exec.h" #include "qemu-char.h" #include "sysemu.h" #include "qemu-char.h" #include "helper_regs.h" #include "hw/spapr.h" #define HPTES_PER_GROUP 8 #define HPTE_V_SSIZE_SHIFT 62 #define HPTE_V_AVPN_SHIFT 7 #define HPTE_V_AVPN 0x3fffffffffffff80ULL #define HPTE_V_AVPN_VAL(x) (((x) & HPTE_V_AVPN) >> HPTE_V_AVPN_SHIFT) #define HPTE_V_COMPARE(x, y) (!(((x) ^ (y)) & 0xffffffffffffff80UL)) #define HPTE_V_BOLTED 0x0000000000000010ULL #define HPTE_V_LOCK 0x0000000000000008ULL #define HPTE_V_LARGE 0x0000000000000004ULL #define HPTE_V_SECONDARY 0x0000000000000002ULL #define HPTE_V_VALID 0x0000000000000001ULL #define HPTE_R_PP0 0x8000000000000000ULL #define HPTE_R_TS 0x4000000000000000ULL #define HPTE_R_KEY_HI 0x3000000000000000ULL #define HPTE_R_RPN_SHIFT 12 #define HPTE_R_RPN 0x3ffffffffffff000ULL #define HPTE_R_FLAGS 0x00000000000003ffULL #define HPTE_R_PP 0x0000000000000003ULL #define HPTE_R_N 0x0000000000000004ULL #define HPTE_R_G 0x0000000000000008ULL #define HPTE_R_M 0x0000000000000010ULL #define HPTE_R_I 0x0000000000000020ULL #define HPTE_R_W 0x0000000000000040ULL #define HPTE_R_WIMG 0x0000000000000078ULL #define HPTE_R_C 0x0000000000000080ULL #define HPTE_R_R 0x0000000000000100ULL #define HPTE_R_KEY_LO 0x0000000000000e00ULL #define HPTE_V_1TB_SEG 0x4000000000000000ULL #define HPTE_V_VRMA_MASK 0x4001ffffff000000ULL #define HPTE_V_HVLOCK 0x40ULL static inline int lock_hpte(void *hpte, target_ulong bits) { uint64_t pteh; pteh = ldq_p(hpte); /* We're protected by qemu's global lock here */ if (pteh & bits) { return 0; } stq_p(hpte, pteh | HPTE_V_HVLOCK); return 1; } static target_ulong compute_tlbie_rb(target_ulong v, target_ulong r, target_ulong pte_index) { target_ulong rb, va_low; rb = (v & ~0x7fULL) << 16; /* AVA field */ va_low = pte_index >> 3; if (v & HPTE_V_SECONDARY) { va_low = ~va_low; } /* xor vsid from AVA */ if (!(v & HPTE_V_1TB_SEG)) { va_low ^= v >> 12; } else { va_low ^= v >> 24; } va_low &= 0x7ff; if (v & HPTE_V_LARGE) { rb |= 1; /* L field */ #if 0 /* Disable that P7 specific bit for now */ if (r & 0xff000) { /* non-16MB large page, must be 64k */ /* (masks depend on page size) */ rb |= 0x1000; /* page encoding in LP field */ rb |= (va_low & 0x7f) << 16; /* 7b of VA in AVA/LP field */ rb |= (va_low & 0xfe); /* AVAL field */ } #endif } else { /* 4kB page */ rb |= (va_low & 0x7ff) << 12; /* remaining 11b of AVA */ } rb |= (v >> 54) & 0x300; /* B field */ return rb; } static target_ulong h_enter(CPUState *env, sPAPREnvironment *spapr, target_ulong opcode, target_ulong *args) { target_ulong flags = args[0]; target_ulong pte_index = args[1]; target_ulong pteh = args[2]; target_ulong ptel = args[3]; target_ulong page_shift = 12; target_ulong raddr; target_ulong i; uint8_t *hpte; /* only handle 4k and 16M pages for now */ if (pteh & HPTE_V_LARGE) { #if 0 /* We don't support 64k pages yet */ if ((ptel & 0xf000) == 0x1000) { /* 64k page */ } else #endif if ((ptel & 0xff000) == 0) { /* 16M page */ page_shift = 24; /* lowest AVA bit must be 0 for 16M pages */ if (pteh & 0x80) { return H_PARAMETER; } } else { return H_PARAMETER; } } raddr = (ptel & HPTE_R_RPN) & ~((1ULL << page_shift) - 1); if (raddr < spapr->ram_limit) { /* Regular RAM - should have WIMG=0010 */ if ((ptel & HPTE_R_WIMG) != HPTE_R_M) { return H_PARAMETER; } } else { /* Looks like an IO address */ /* FIXME: What WIMG combinations could be sensible for IO? * For now we allow WIMG=010x, but are there others? */ /* FIXME: Should we check against registered IO addresses? */ if ((ptel & (HPTE_R_W | HPTE_R_I | HPTE_R_M)) != HPTE_R_I) { return H_PARAMETER; } } pteh &= ~0x60ULL; if ((pte_index * HASH_PTE_SIZE_64) & ~env->htab_mask) { return H_PARAMETER; } if (likely((flags & H_EXACT) == 0)) { pte_index &= ~7ULL; hpte = env->external_htab + (pte_index * HASH_PTE_SIZE_64); for (i = 0; ; ++i) { if (i == 8) { return H_PTEG_FULL; } if (((ldq_p(hpte) & HPTE_V_VALID) == 0) && lock_hpte(hpte, HPTE_V_HVLOCK | HPTE_V_VALID)) { break; } hpte += HASH_PTE_SIZE_64; } } else { i = 0; hpte = env->external_htab + (pte_index * HASH_PTE_SIZE_64); if (!lock_hpte(hpte, HPTE_V_HVLOCK | HPTE_V_VALID)) { return H_PTEG_FULL; } } stq_p(hpte + (HASH_PTE_SIZE_64/2), ptel); /* eieio(); FIXME: need some sort of barrier for smp? */ stq_p(hpte, pteh); assert(!(ldq_p(hpte) & HPTE_V_HVLOCK)); args[0] = pte_index + i; return H_SUCCESS; } enum { REMOVE_SUCCESS = 0, REMOVE_NOT_FOUND = 1, REMOVE_PARM = 2, REMOVE_HW = 3, }; static target_ulong remove_hpte(CPUState *env, target_ulong ptex, target_ulong avpn, target_ulong flags, target_ulong *vp, target_ulong *rp) { uint8_t *hpte; target_ulong v, r, rb; if ((ptex * HASH_PTE_SIZE_64) & ~env->htab_mask) { return REMOVE_PARM; } hpte = env->external_htab + (ptex * HASH_PTE_SIZE_64); while (!lock_hpte(hpte, HPTE_V_HVLOCK)) { /* We have no real concurrency in qemu soft-emulation, so we * will never actually have a contested lock */ assert(0); } v = ldq_p(hpte); r = ldq_p(hpte + (HASH_PTE_SIZE_64/2)); if ((v & HPTE_V_VALID) == 0 || ((flags & H_AVPN) && (v & ~0x7fULL) != avpn) || ((flags & H_ANDCOND) && (v & avpn) != 0)) { stq_p(hpte, v & ~HPTE_V_HVLOCK); assert(!(ldq_p(hpte) & HPTE_V_HVLOCK)); return REMOVE_NOT_FOUND; } *vp = v & ~HPTE_V_HVLOCK; *rp = r; stq_p(hpte, 0); rb = compute_tlbie_rb(v, r, ptex); ppc_tlb_invalidate_one(env, rb); assert(!(ldq_p(hpte) & HPTE_V_HVLOCK)); return REMOVE_SUCCESS; } static target_ulong h_remove(CPUState *env, sPAPREnvironment *spapr, target_ulong opcode, target_ulong *args) { target_ulong flags = args[0]; target_ulong pte_index = args[1]; target_ulong avpn = args[2]; int ret; ret = remove_hpte(env, pte_index, avpn, flags, &args[0], &args[1]); switch (ret) { case REMOVE_SUCCESS: return H_SUCCESS; case REMOVE_NOT_FOUND: return H_NOT_FOUND; case REMOVE_PARM: return H_PARAMETER; case REMOVE_HW: return H_HARDWARE; } assert(0); } #define H_BULK_REMOVE_TYPE 0xc000000000000000ULL #define H_BULK_REMOVE_REQUEST 0x4000000000000000ULL #define H_BULK_REMOVE_RESPONSE 0x8000000000000000ULL #define H_BULK_REMOVE_END 0xc000000000000000ULL #define H_BULK_REMOVE_CODE 0x3000000000000000ULL #define H_BULK_REMOVE_SUCCESS 0x0000000000000000ULL #define H_BULK_REMOVE_NOT_FOUND 0x1000000000000000ULL #define H_BULK_REMOVE_PARM 0x2000000000000000ULL #define H_BULK_REMOVE_HW 0x3000000000000000ULL #define H_BULK_REMOVE_RC 0x0c00000000000000ULL #define H_BULK_REMOVE_FLAGS 0x0300000000000000ULL #define H_BULK_REMOVE_ABSOLUTE 0x0000000000000000ULL #define H_BULK_REMOVE_ANDCOND 0x0100000000000000ULL #define H_BULK_REMOVE_AVPN 0x0200000000000000ULL #define H_BULK_REMOVE_PTEX 0x00ffffffffffffffULL #define H_BULK_REMOVE_MAX_BATCH 4 static target_ulong h_bulk_remove(CPUState *env, sPAPREnvironment *spapr, target_ulong opcode, target_ulong *args) { int i; for (i = 0; i < H_BULK_REMOVE_MAX_BATCH; i++) { target_ulong *tsh = &args[i*2]; target_ulong tsl = args[i*2 + 1]; target_ulong v, r, ret; if ((*tsh & H_BULK_REMOVE_TYPE) == H_BULK_REMOVE_END) { break; } else if ((*tsh & H_BULK_REMOVE_TYPE) != H_BULK_REMOVE_REQUEST) { return H_PARAMETER; } *tsh &= H_BULK_REMOVE_PTEX | H_BULK_REMOVE_FLAGS; *tsh |= H_BULK_REMOVE_RESPONSE; if ((*tsh & H_BULK_REMOVE_ANDCOND) && (*tsh & H_BULK_REMOVE_AVPN)) { *tsh |= H_BULK_REMOVE_PARM; return H_PARAMETER; } ret = remove_hpte(env, *tsh & H_BULK_REMOVE_PTEX, tsl, (*tsh & H_BULK_REMOVE_FLAGS) >> 26, &v, &r); *tsh |= ret << 60; switch (ret) { case REMOVE_SUCCESS: *tsh |= (r & (HPTE_R_C | HPTE_R_R)) << 43; break; case REMOVE_PARM: return H_PARAMETER; case REMOVE_HW: return H_HARDWARE; } } return H_SUCCESS; } static target_ulong h_protect(CPUState *env, sPAPREnvironment *spapr, target_ulong opcode, target_ulong *args) { target_ulong flags = args[0]; target_ulong pte_index = args[1]; target_ulong avpn = args[2]; uint8_t *hpte; target_ulong v, r, rb; if ((pte_index * HASH_PTE_SIZE_64) & ~env->htab_mask) { return H_PARAMETER; } hpte = env->external_htab + (pte_index * HASH_PTE_SIZE_64); while (!lock_hpte(hpte, HPTE_V_HVLOCK)) { /* We have no real concurrency in qemu soft-emulation, so we * will never actually have a contested lock */ assert(0); } v = ldq_p(hpte); r = ldq_p(hpte + (HASH_PTE_SIZE_64/2)); if ((v & HPTE_V_VALID) == 0 || ((flags & H_AVPN) && (v & ~0x7fULL) != avpn)) { stq_p(hpte, v & ~HPTE_V_HVLOCK); assert(!(ldq_p(hpte) & HPTE_V_HVLOCK)); return H_NOT_FOUND; } r &= ~(HPTE_R_PP0 | HPTE_R_PP | HPTE_R_N | HPTE_R_KEY_HI | HPTE_R_KEY_LO); r |= (flags << 55) & HPTE_R_PP0; r |= (flags << 48) & HPTE_R_KEY_HI; r |= flags & (HPTE_R_PP | HPTE_R_N | HPTE_R_KEY_LO); rb = compute_tlbie_rb(v, r, pte_index); stq_p(hpte, v & ~HPTE_V_VALID); ppc_tlb_invalidate_one(env, rb); stq_p(hpte + (HASH_PTE_SIZE_64/2), r); /* Don't need a memory barrier, due to qemu's global lock */ stq_p(hpte, v & ~HPTE_V_HVLOCK); assert(!(ldq_p(hpte) & HPTE_V_HVLOCK)); return H_SUCCESS; } static target_ulong h_set_dabr(CPUState *env, sPAPREnvironment *spapr, target_ulong opcode, target_ulong *args) { /* FIXME: actually implement this */ return H_HARDWARE; } #define FLAGS_REGISTER_VPA 0x0000200000000000ULL #define FLAGS_REGISTER_DTL 0x0000400000000000ULL #define FLAGS_REGISTER_SLBSHADOW 0x0000600000000000ULL #define FLAGS_DEREGISTER_VPA 0x0000a00000000000ULL #define FLAGS_DEREGISTER_DTL 0x0000c00000000000ULL #define FLAGS_DEREGISTER_SLBSHADOW 0x0000e00000000000ULL #define VPA_MIN_SIZE 640 #define VPA_SIZE_OFFSET 0x4 #define VPA_SHARED_PROC_OFFSET 0x9 #define VPA_SHARED_PROC_VAL 0x2 static target_ulong register_vpa(CPUState *env, target_ulong vpa) { uint16_t size; uint8_t tmp; if (vpa == 0) { hcall_dprintf("Can't cope with registering a VPA at logical 0\n"); return H_HARDWARE; } if (vpa % env->dcache_line_size) { return H_PARAMETER; } /* FIXME: bounds check the address */ size = lduw_be_phys(vpa + 0x4); if (size < VPA_MIN_SIZE) { return H_PARAMETER; } /* VPA is not allowed to cross a page boundary */ if ((vpa / 4096) != ((vpa + size - 1) / 4096)) { return H_PARAMETER; } env->vpa = vpa; tmp = ldub_phys(env->vpa + VPA_SHARED_PROC_OFFSET); tmp |= VPA_SHARED_PROC_VAL; stb_phys(env->vpa + VPA_SHARED_PROC_OFFSET, tmp); return H_SUCCESS; } static target_ulong deregister_vpa(CPUState *env, target_ulong vpa) { if (env->slb_shadow) { return H_RESOURCE; } if (env->dispatch_trace_log) { return H_RESOURCE; } env->vpa = 0; return H_SUCCESS; } static target_ulong register_slb_shadow(CPUState *env, target_ulong addr) { uint32_t size; if (addr == 0) { hcall_dprintf("Can't cope with SLB shadow at logical 0\n"); return H_HARDWARE; } size = ldl_be_phys(addr + 0x4); if (size < 0x8) { return H_PARAMETER; } if ((addr / 4096) != ((addr + size - 1) / 4096)) { return H_PARAMETER; } if (!env->vpa) { return H_RESOURCE; } env->slb_shadow = addr; return H_SUCCESS; } static target_ulong deregister_slb_shadow(CPUState *env, target_ulong addr) { env->slb_shadow = 0; return H_SUCCESS; } static target_ulong register_dtl(CPUState *env, target_ulong addr) { uint32_t size; if (addr == 0) { hcall_dprintf("Can't cope with DTL at logical 0\n"); return H_HARDWARE; } size = ldl_be_phys(addr + 0x4); if (size < 48) { return H_PARAMETER; } if (!env->vpa) { return H_RESOURCE; } env->dispatch_trace_log = addr; env->dtl_size = size; return H_SUCCESS; } static target_ulong deregister_dtl(CPUState *emv, target_ulong addr) { env->dispatch_trace_log = 0; env->dtl_size = 0; return H_SUCCESS; } static target_ulong h_register_vpa(CPUState *env, sPAPREnvironment *spapr, target_ulong opcode, target_ulong *args) { target_ulong flags = args[0]; target_ulong procno = args[1]; target_ulong vpa = args[2]; target_ulong ret = H_PARAMETER; CPUState *tenv; for (tenv = first_cpu; tenv; tenv = tenv->next_cpu) { if (tenv->cpu_index == procno) { break; } } if (!tenv) { return H_PARAMETER; } switch (flags) { case FLAGS_REGISTER_VPA: ret = register_vpa(tenv, vpa); break; case FLAGS_DEREGISTER_VPA: ret = deregister_vpa(tenv, vpa); break; case FLAGS_REGISTER_SLBSHADOW: ret = register_slb_shadow(tenv, vpa); break; case FLAGS_DEREGISTER_SLBSHADOW: ret = deregister_slb_shadow(tenv, vpa); break; case FLAGS_REGISTER_DTL: ret = register_dtl(tenv, vpa); break; case FLAGS_DEREGISTER_DTL: ret = deregister_dtl(tenv, vpa); break; } return ret; } static target_ulong h_cede(CPUState *env, sPAPREnvironment *spapr, target_ulong opcode, target_ulong *args) { env->msr |= (1ULL << MSR_EE); hreg_compute_hflags(env); if (!cpu_has_work(env)) { env->halted = 1; } return H_SUCCESS; } static target_ulong h_rtas(CPUState *env, sPAPREnvironment *spapr, target_ulong opcode, target_ulong *args) { target_ulong rtas_r3 = args[0]; uint32_t token = ldl_be_phys(rtas_r3); uint32_t nargs = ldl_be_phys(rtas_r3 + 4); uint32_t nret = ldl_be_phys(rtas_r3 + 8); return spapr_rtas_call(spapr, token, nargs, rtas_r3 + 12, nret, rtas_r3 + 12 + 4*nargs); } static target_ulong h_logical_load(CPUState *env, sPAPREnvironment *spapr, target_ulong opcode, target_ulong *args) { target_ulong size = args[0]; target_ulong addr = args[1]; switch (size) { case 1: args[0] = ldub_phys(addr); return H_SUCCESS; case 2: args[0] = lduw_phys(addr); return H_SUCCESS; case 4: args[0] = ldl_phys(addr); return H_SUCCESS; case 8: args[0] = ldq_phys(addr); return H_SUCCESS; } return H_PARAMETER; } static target_ulong h_logical_store(CPUState *env, sPAPREnvironment *spapr, target_ulong opcode, target_ulong *args) { target_ulong size = args[0]; target_ulong addr = args[1]; target_ulong val = args[2]; switch (size) { case 1: stb_phys(addr, val); return H_SUCCESS; case 2: stw_phys(addr, val); return H_SUCCESS; case 4: stl_phys(addr, val); return H_SUCCESS; case 8: stq_phys(addr, val); return H_SUCCESS; } return H_PARAMETER; } static target_ulong h_logical_icbi(CPUState *env, sPAPREnvironment *spapr, target_ulong opcode, target_ulong *args) { /* Nothing to do on emulation, KVM will trap this in the kernel */ return H_SUCCESS; } static target_ulong h_logical_dcbf(CPUState *env, sPAPREnvironment *spapr, target_ulong opcode, target_ulong *args) { /* Nothing to do on emulation, KVM will trap this in the kernel */ return H_SUCCESS; } static spapr_hcall_fn papr_hypercall_table[(MAX_HCALL_OPCODE / 4) + 1]; static spapr_hcall_fn kvmppc_hypercall_table[KVMPPC_HCALL_MAX - KVMPPC_HCALL_BASE + 1]; void spapr_register_hypercall(target_ulong opcode, spapr_hcall_fn fn) { spapr_hcall_fn *slot; if (opcode <= MAX_HCALL_OPCODE) { assert((opcode & 0x3) == 0); slot = &papr_hypercall_table[opcode / 4]; } else { assert((opcode >= KVMPPC_HCALL_BASE) && (opcode <= KVMPPC_HCALL_MAX)); slot = &kvmppc_hypercall_table[opcode - KVMPPC_HCALL_BASE]; } assert(!(*slot) || (fn == *slot)); *slot = fn; } target_ulong spapr_hypercall(CPUState *env, target_ulong opcode, target_ulong *args) { if (msr_pr) { hcall_dprintf("Hypercall made with MSR[PR]=1\n"); return H_PRIVILEGE; } if ((opcode <= MAX_HCALL_OPCODE) && ((opcode & 0x3) == 0)) { spapr_hcall_fn fn = papr_hypercall_table[opcode / 4]; if (fn) { return fn(env, spapr, opcode, args); } } else if ((opcode >= KVMPPC_HCALL_BASE) && (opcode <= KVMPPC_HCALL_MAX)) { spapr_hcall_fn fn = kvmppc_hypercall_table[opcode - KVMPPC_HCALL_BASE]; if (fn) { return fn(env, spapr, opcode, args); } } hcall_dprintf("Unimplemented hcall 0x" TARGET_FMT_lx "\n", opcode); return H_FUNCTION; } static void hypercall_register_types(void) { /* hcall-pft */ spapr_register_hypercall(H_ENTER, h_enter); spapr_register_hypercall(H_REMOVE, h_remove); spapr_register_hypercall(H_PROTECT, h_protect); /* hcall-bulk */ spapr_register_hypercall(H_BULK_REMOVE, h_bulk_remove); /* hcall-dabr */ spapr_register_hypercall(H_SET_DABR, h_set_dabr); /* hcall-splpar */ spapr_register_hypercall(H_REGISTER_VPA, h_register_vpa); spapr_register_hypercall(H_CEDE, h_cede); /* "debugger" hcalls (also used by SLOF). Note: We do -not- differenciate * here between the "CI" and the "CACHE" variants, they will use whatever * mapping attributes qemu is using. When using KVM, the kernel will * enforce the attributes more strongly */ spapr_register_hypercall(H_LOGICAL_CI_LOAD, h_logical_load); spapr_register_hypercall(H_LOGICAL_CI_STORE, h_logical_store); spapr_register_hypercall(H_LOGICAL_CACHE_LOAD, h_logical_load); spapr_register_hypercall(H_LOGICAL_CACHE_STORE, h_logical_store); spapr_register_hypercall(H_LOGICAL_ICBI, h_logical_icbi); spapr_register_hypercall(H_LOGICAL_DCBF, h_logical_dcbf); /* qemu/KVM-PPC specific hcalls */ spapr_register_hypercall(KVMPPC_H_RTAS, h_rtas); } type_init(hypercall_register_types)