mirror of https://gitee.com/openkylin/linux.git
KVM: x86 emulator: X86EMUL macro replacements: x86_emulate_insn() and its helpers
This patch just replaces integer values used inside x86_emulate_insn() and its helper functions to X86EMUL_*. The purpose of this is to make it clear what will happen when the variable rc is compared to X86EMUL_* at the end of x86_emulate_insn(). Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Takuya Yoshikawa
Avi Kivity
parent
3e2815e9fa
commit
1b30eaa846
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@ -702,7 +702,7 @@ static int read_descriptor(struct x86_emulate_ctxt *ctxt,
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*address = 0;
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rc = ops->read_std((unsigned long)ptr, (unsigned long *)size, 2,
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ctxt->vcpu, NULL);
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if (rc)
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if (rc != X86EMUL_CONTINUE)
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return rc;
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rc = ops->read_std((unsigned long)ptr + 2, address, op_bytes,
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ctxt->vcpu, NULL);
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@ -1301,7 +1301,7 @@ static int emulate_pop_sreg(struct x86_emulate_ctxt *ctxt,
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int rc;
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rc = emulate_pop(ctxt, ops, &selector, c->op_bytes);
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if (rc != 0)
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if (rc != X86EMUL_CONTINUE)
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return rc;
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rc = kvm_load_segment_descriptor(ctxt->vcpu, (u16)selector, seg);
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@ -1327,7 +1327,7 @@ static int emulate_popa(struct x86_emulate_ctxt *ctxt,
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struct x86_emulate_ops *ops)
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{
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struct decode_cache *c = &ctxt->decode;
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int rc = 0;
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int rc = X86EMUL_CONTINUE;
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int reg = VCPU_REGS_RDI;
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while (reg >= VCPU_REGS_RAX) {
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@ -1338,7 +1338,7 @@ static int emulate_popa(struct x86_emulate_ctxt *ctxt,
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}
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rc = emulate_pop(ctxt, ops, &c->regs[reg], c->op_bytes);
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if (rc != 0)
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if (rc != X86EMUL_CONTINUE)
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break;
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--reg;
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}
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@ -1349,12 +1349,8 @@ static inline int emulate_grp1a(struct x86_emulate_ctxt *ctxt,
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struct x86_emulate_ops *ops)
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{
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struct decode_cache *c = &ctxt->decode;
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int rc;
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rc = emulate_pop(ctxt, ops, &c->dst.val, c->dst.bytes);
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if (rc != 0)
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return rc;
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return 0;
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return emulate_pop(ctxt, ops, &c->dst.val, c->dst.bytes);
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}
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static inline void emulate_grp2(struct x86_emulate_ctxt *ctxt)
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@ -1390,7 +1386,7 @@ static inline int emulate_grp3(struct x86_emulate_ctxt *ctxt,
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struct x86_emulate_ops *ops)
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{
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struct decode_cache *c = &ctxt->decode;
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int rc = 0;
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int rc = X86EMUL_CONTINUE;
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switch (c->modrm_reg) {
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case 0 ... 1: /* test */
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@ -1437,7 +1433,7 @@ static inline int emulate_grp45(struct x86_emulate_ctxt *ctxt,
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emulate_push(ctxt);
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break;
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}
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return 0;
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return X86EMUL_CONTINUE;
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}
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static inline int emulate_grp9(struct x86_emulate_ctxt *ctxt,
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@ -1468,7 +1464,7 @@ static inline int emulate_grp9(struct x86_emulate_ctxt *ctxt,
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return rc;
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ctxt->eflags |= EFLG_ZF;
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}
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return 0;
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return X86EMUL_CONTINUE;
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}
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static int emulate_ret_far(struct x86_emulate_ctxt *ctxt,
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@ -1479,12 +1475,12 @@ static int emulate_ret_far(struct x86_emulate_ctxt *ctxt,
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unsigned long cs;
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rc = emulate_pop(ctxt, ops, &c->eip, c->op_bytes);
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if (rc)
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if (rc != X86EMUL_CONTINUE)
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return rc;
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if (c->op_bytes == 4)
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c->eip = (u32)c->eip;
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rc = emulate_pop(ctxt, ops, &cs, c->op_bytes);
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if (rc)
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if (rc != X86EMUL_CONTINUE)
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return rc;
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rc = kvm_load_segment_descriptor(ctxt->vcpu, (u16)cs, VCPU_SREG_CS);
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return rc;
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@ -1539,7 +1535,7 @@ static inline int writeback(struct x86_emulate_ctxt *ctxt,
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default:
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break;
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}
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return 0;
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return X86EMUL_CONTINUE;
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}
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static void toggle_interruptibility(struct x86_emulate_ctxt *ctxt, u32 mask)
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@ -1811,7 +1807,7 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
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struct decode_cache *c = &ctxt->decode;
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unsigned int port;
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int io_dir_in;
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int rc = 0;
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int rc = X86EMUL_CONTINUE;
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ctxt->interruptibility = 0;
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@ -1926,7 +1922,7 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
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break;
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case 0x07: /* pop es */
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rc = emulate_pop_sreg(ctxt, ops, VCPU_SREG_ES);
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if (rc != 0)
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if (rc != X86EMUL_CONTINUE)
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goto done;
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break;
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case 0x08 ... 0x0d:
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@ -1945,7 +1941,7 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
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break;
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case 0x17: /* pop ss */
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rc = emulate_pop_sreg(ctxt, ops, VCPU_SREG_SS);
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if (rc != 0)
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if (rc != X86EMUL_CONTINUE)
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goto done;
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break;
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case 0x18 ... 0x1d:
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@ -1957,7 +1953,7 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
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break;
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case 0x1f: /* pop ds */
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rc = emulate_pop_sreg(ctxt, ops, VCPU_SREG_DS);
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if (rc != 0)
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if (rc != X86EMUL_CONTINUE)
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goto done;
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break;
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case 0x20 ... 0x25:
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@ -1988,7 +1984,7 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
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case 0x58 ... 0x5f: /* pop reg */
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pop_instruction:
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rc = emulate_pop(ctxt, ops, &c->dst.val, c->op_bytes);
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if (rc != 0)
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if (rc != X86EMUL_CONTINUE)
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goto done;
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break;
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case 0x60: /* pusha */
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@ -1996,7 +1992,7 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
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break;
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case 0x61: /* popa */
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rc = emulate_popa(ctxt, ops);
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if (rc != 0)
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if (rc != X86EMUL_CONTINUE)
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goto done;
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break;
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case 0x63: /* movsxd */
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@ -2141,7 +2137,7 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
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}
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case 0x8f: /* pop (sole member of Grp1a) */
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rc = emulate_grp1a(ctxt, ops);
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if (rc != 0)
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if (rc != X86EMUL_CONTINUE)
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goto done;
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break;
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case 0x90: /* nop / xchg r8,rax */
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@ -2277,7 +2273,7 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
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break;
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case 0xcb: /* ret far */
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rc = emulate_ret_far(ctxt, ops);
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if (rc)
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if (rc != X86EMUL_CONTINUE)
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goto done;
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break;
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case 0xd0 ... 0xd1: /* Grp2 */
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@ -2351,7 +2347,7 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
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break;
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case 0xf6 ... 0xf7: /* Grp3 */
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rc = emulate_grp3(ctxt, ops);
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if (rc != 0)
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if (rc != X86EMUL_CONTINUE)
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goto done;
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break;
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case 0xf8: /* clc */
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@ -2385,14 +2381,14 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
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break;
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case 0xfe ... 0xff: /* Grp4/Grp5 */
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rc = emulate_grp45(ctxt, ops);
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if (rc != 0)
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if (rc != X86EMUL_CONTINUE)
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goto done;
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break;
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}
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writeback:
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rc = writeback(ctxt, ops);
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if (rc != 0)
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if (rc != X86EMUL_CONTINUE)
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goto done;
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/* Commit shadow register state. */
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@ -2418,7 +2414,7 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
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goto cannot_emulate;
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rc = kvm_fix_hypercall(ctxt->vcpu);
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if (rc)
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if (rc != X86EMUL_CONTINUE)
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goto done;
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/* Let the processor re-execute the fixed hypercall */
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@ -2429,7 +2425,7 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
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case 2: /* lgdt */
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rc = read_descriptor(ctxt, ops, c->src.ptr,
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&size, &address, c->op_bytes);
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if (rc)
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if (rc != X86EMUL_CONTINUE)
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goto done;
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realmode_lgdt(ctxt->vcpu, size, address);
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/* Disable writeback. */
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@ -2440,7 +2436,7 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
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switch (c->modrm_rm) {
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case 1:
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rc = kvm_fix_hypercall(ctxt->vcpu);
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if (rc)
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if (rc != X86EMUL_CONTINUE)
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goto done;
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break;
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default:
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@ -2450,7 +2446,7 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
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rc = read_descriptor(ctxt, ops, c->src.ptr,
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&size, &address,
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c->op_bytes);
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if (rc)
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if (rc != X86EMUL_CONTINUE)
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goto done;
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realmode_lidt(ctxt->vcpu, size, address);
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}
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@ -2577,7 +2573,7 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
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break;
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case 0xa1: /* pop fs */
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rc = emulate_pop_sreg(ctxt, ops, VCPU_SREG_FS);
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if (rc != 0)
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if (rc != X86EMUL_CONTINUE)
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goto done;
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break;
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case 0xa3:
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@ -2596,7 +2592,7 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
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break;
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case 0xa9: /* pop gs */
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rc = emulate_pop_sreg(ctxt, ops, VCPU_SREG_GS);
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if (rc != 0)
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if (rc != X86EMUL_CONTINUE)
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goto done;
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break;
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case 0xab:
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@ -2669,7 +2665,7 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
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break;
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case 0xc7: /* Grp9 (cmpxchg8b) */
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rc = emulate_grp9(ctxt, ops, memop);
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if (rc != 0)
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if (rc != X86EMUL_CONTINUE)
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goto done;
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c->dst.type = OP_NONE;
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break;
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