These functions returns X86EMUL_* or 0 or 1 or ... This patch fix the conflicts between these values and make them return one of X86EMUL_* values.
NOTE: In these functions, directly returning the ret value from the kvm_load_segment_descriptor should have been fixed. Signed-off-by: Takuya Yoshikawa <[email protected]> --- arch/x86/kvm/emulate.c | 44 +++++++++++++++++++++----------------------- 1 files changed, 21 insertions(+), 23 deletions(-) diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index b124578..9953f5b 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -613,14 +613,14 @@ static int do_fetch_insn_byte(struct x86_emulate_ctxt *ctxt, fc->end = linear + size; } *dest = fc->data[linear - fc->start]; - return 0; + return X86EMUL_CONTINUE; } static int do_insn_fetch(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops, unsigned long eip, void *dest, unsigned size) { - int rc = 0; + int rc; /* x86 instructions are limited to 15 bytes. */ if (eip + size - ctxt->decode.eip_orig > 15) @@ -628,10 +628,10 @@ static int do_insn_fetch(struct x86_emulate_ctxt *ctxt, eip += ctxt->cs_base; while (size--) { rc = do_fetch_insn_byte(ctxt, ops, eip++, dest++); - if (rc) + if (rc != X86EMUL_CONTINUE) return rc; } - return 0; + return X86EMUL_CONTINUE; } /* @@ -742,7 +742,7 @@ static int decode_modrm(struct x86_emulate_ctxt *ctxt, struct decode_cache *c = &ctxt->decode; u8 sib; int index_reg = 0, base_reg = 0, scale; - int rc = 0; + int rc = X86EMUL_CONTINUE; if (c->rex_prefix) { c->modrm_reg = (c->rex_prefix & 4) << 1; /* REX.R */ @@ -855,7 +855,7 @@ static int decode_abs(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops) { struct decode_cache *c = &ctxt->decode; - int rc = 0; + int rc = X86EMUL_CONTINUE; switch (c->ad_bytes) { case 2: @@ -876,7 +876,7 @@ int x86_decode_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops) { struct decode_cache *c = &ctxt->decode; - int rc = 0; + int rc = X86EMUL_CONTINUE; int mode = ctxt->mode; int def_op_bytes, def_ad_bytes, group; @@ -1222,10 +1222,11 @@ static int emulate_pop_sreg(struct x86_emulate_ctxt *ctxt, int rc; rc = emulate_pop(ctxt, ops, &selector, c->op_bytes); - if (rc != 0) + if (rc != X86EMUL_CONTINUE) return rc; - rc = kvm_load_segment_descriptor(ctxt->vcpu, (u16)selector, 1, seg); + if (kvm_load_segment_descriptor(ctxt->vcpu, (u16)selector, 1, seg)) + return X86EMUL_UNHANDLEABLE; return rc; } @@ -1248,7 +1249,7 @@ static int emulate_popa(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops) { struct decode_cache *c = &ctxt->decode; - int rc = 0; + int rc = X86EMUL_CONTINUE; int reg = VCPU_REGS_RDI; while (reg >= VCPU_REGS_RAX) { @@ -1259,7 +1260,7 @@ static int emulate_popa(struct x86_emulate_ctxt *ctxt, } rc = emulate_pop(ctxt, ops, &c->regs[reg], c->op_bytes); - if (rc != 0) + if (rc != X86EMUL_CONTINUE) break; --reg; } @@ -1270,12 +1271,8 @@ static inline int emulate_grp1a(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops) { struct decode_cache *c = &ctxt->decode; - int rc; - rc = emulate_pop(ctxt, ops, &c->dst.val, c->dst.bytes); - if (rc != 0) - return rc; - return 0; + return emulate_pop(ctxt, ops, &c->dst.val, c->dst.bytes); } static inline void emulate_grp2(struct x86_emulate_ctxt *ctxt) @@ -1311,7 +1308,7 @@ static inline int emulate_grp3(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops) { struct decode_cache *c = &ctxt->decode; - int rc = 0; + int rc = X86EMUL_CONTINUE; switch (c->modrm_reg) { case 0 ... 1: /* test */ @@ -1358,7 +1355,7 @@ static inline int emulate_grp45(struct x86_emulate_ctxt *ctxt, emulate_push(ctxt); break; } - return 0; + return X86EMUL_CONTINUE; } static inline int emulate_grp9(struct x86_emulate_ctxt *ctxt, @@ -1389,7 +1386,7 @@ static inline int emulate_grp9(struct x86_emulate_ctxt *ctxt, return rc; ctxt->eflags |= EFLG_ZF; } - return 0; + return X86EMUL_CONTINUE; } static int emulate_ret_far(struct x86_emulate_ctxt *ctxt, @@ -1400,14 +1397,15 @@ static int emulate_ret_far(struct x86_emulate_ctxt *ctxt, unsigned long cs; rc = emulate_pop(ctxt, ops, &c->eip, c->op_bytes); - if (rc) + if (rc != X86EMUL_CONTINUE) return rc; if (c->op_bytes == 4) c->eip = (u32)c->eip; rc = emulate_pop(ctxt, ops, &cs, c->op_bytes); - if (rc) + if (rc != X86EMUL_CONTINUE) return rc; - rc = kvm_load_segment_descriptor(ctxt->vcpu, (u16)cs, 1, VCPU_SREG_CS); + if (kvm_load_segment_descriptor(ctxt->vcpu, (u16)cs, 1, VCPU_SREG_CS)) + return X86EMUL_UNHANDLEABLE; return rc; } @@ -1460,7 +1458,7 @@ static inline int writeback(struct x86_emulate_ctxt *ctxt, default: break; } - return 0; + return X86EMUL_CONTINUE; } static void toggle_interruptibility(struct x86_emulate_ctxt *ctxt, u32 mask) -- 1.6.3.3 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
