diff options
Diffstat (limited to 'hw/spapr_hcall.c')
| -rw-r--r-- | hw/spapr_hcall.c | 525 |
1 files changed, 525 insertions, 0 deletions
diff --git a/hw/spapr_hcall.c b/hw/spapr_hcall.c new file mode 100644 index 0000000..f88e1d2 --- /dev/null +++ b/hw/spapr_hcall.c @@ -0,0 +1,525 @@ +#include "sysemu.h" +#include "cpu.h" +#include "qemu-char.h" +#include "sysemu.h" +#include "qemu-char.h" +#include "exec-all.h" +#include "exec.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 porder; + target_ulong i, pa; + uint8_t *hpte; + + /* only handle 4k and 16M pages for now */ + porder = 12; + if (pteh & HPTE_V_LARGE) { +#if 0 /* We don't support 64k pages yet */ + if ((ptel & 0xf000) == 0x1000) { + /* 64k page */ + porder = 16; + } else +#endif + if ((ptel & 0xff000) == 0) { + /* 16M page */ + porder = 24; + /* lowest AVA bit must be 0 for 16M pages */ + if (pteh & 0x80) { + return H_PARAMETER; + } + } else { + return H_PARAMETER; + } + } + + pa = ptel & HPTE_R_RPN; + /* FIXME: bounds check the pa? */ + + /* Check WIMG */ + if ((ptel & HPTE_R_WIMG) != HPTE_R_M) { + 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; +} + +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]; + 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) || + ((flags & H_ANDCOND) && (v & avpn) != 0)) { + stq_p(hpte, v & ~HPTE_V_HVLOCK); + assert(!(ldq_p(hpte) & HPTE_V_HVLOCK)); + return H_NOT_FOUND; + } + args[0] = v & ~HPTE_V_HVLOCK; + args[1] = r; + stq_p(hpte, 0); + rb = compute_tlbie_rb(v, r, pte_index); + ppc_tlb_invalidate_one(env, rb); + assert(!(ldq_p(hpte) & HPTE_V_HVLOCK)); + 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_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_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_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_phys(rtas_r3); + uint32_t nargs = ldl_phys(rtas_r3 + 4); + uint32_t nret = ldl_phys(rtas_r3 + 8); + + return spapr_rtas_call(spapr, token, nargs, rtas_r3 + 12, + nret, rtas_r3 + 12 + 4*nargs); +} + +spapr_hcall_fn papr_hypercall_table[(MAX_HCALL_OPCODE / 4) + 1]; +spapr_hcall_fn kvmppc_hypercall_table[KVMPPC_HCALL_MAX - KVMPPC_HCALL_BASE]; + +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_init(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-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); + + /* qemu/KVM-PPC specific hcalls */ + spapr_register_hypercall(KVMPPC_H_RTAS, h_rtas); +} +device_init(hypercall_init); |