From 717746e382e58f075642403eaac26bce0640b2c5 Mon Sep 17 00:00:00 2001 From: Avi Kivity Date: Wed, 20 Apr 2011 13:37:53 +0300 Subject: [PATCH] KVM: x86 emulator: drop vcpu argument from cr/dr/cpl/msr callbacks Making the emulator caller agnostic. Signed-off-by: Avi Kivity --- arch/x86/include/asm/kvm_emulate.h | 14 ++--- arch/x86/kvm/emulate.c | 84 +++++++++++++++--------------- arch/x86/kvm/x86.c | 34 ++++++++---- 3 files changed, 73 insertions(+), 59 deletions(-) diff --git a/arch/x86/include/asm/kvm_emulate.h b/arch/x86/include/asm/kvm_emulate.h index 656046a1bd51..2c02e753ab82 100644 --- a/arch/x86/include/asm/kvm_emulate.h +++ b/arch/x86/include/asm/kvm_emulate.h @@ -176,13 +176,13 @@ struct x86_emulate_ops { int seg); void (*get_gdt)(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt); void (*get_idt)(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt); - ulong (*get_cr)(int cr, struct kvm_vcpu *vcpu); - int (*set_cr)(int cr, ulong val, struct kvm_vcpu *vcpu); - int (*cpl)(struct kvm_vcpu *vcpu); - int (*get_dr)(int dr, unsigned long *dest, struct kvm_vcpu *vcpu); - int (*set_dr)(int dr, unsigned long value, struct kvm_vcpu *vcpu); - int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data); - int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata); + ulong (*get_cr)(struct x86_emulate_ctxt *ctxt, int cr); + int (*set_cr)(struct x86_emulate_ctxt *ctxt, int cr, ulong val); + int (*cpl)(struct x86_emulate_ctxt *ctxt); + int (*get_dr)(struct x86_emulate_ctxt *ctxt, int dr, ulong *dest); + int (*set_dr)(struct x86_emulate_ctxt *ctxt, int dr, ulong value); + int (*set_msr)(struct x86_emulate_ctxt *ctxt, u32 msr_index, u64 data); + int (*get_msr)(struct x86_emulate_ctxt *ctxt, u32 msr_index, u64 *pdata); void (*get_fpu)(struct x86_emulate_ctxt *ctxt); /* disables preempt */ void (*put_fpu)(struct x86_emulate_ctxt *ctxt); /* reenables preempt */ int (*intercept)(struct kvm_vcpu *vcpu, diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index 9602889f0f7f..33ad16b7db2b 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -596,7 +596,7 @@ static int __linearize(struct x86_emulate_ctxt *ctxt, if (addr.ea > lim || (u32)(addr.ea + size - 1) > lim) goto bad; } - cpl = ctxt->ops->cpl(ctxt->vcpu); + cpl = ctxt->ops->cpl(ctxt); rpl = ctxt->ops->get_segment_selector(ctxt, addr.seg) & 3; cpl = max(cpl, rpl); if (!(desc.type & 8)) { @@ -1248,7 +1248,7 @@ static int load_segment_descriptor(struct x86_emulate_ctxt *ctxt, rpl = selector & 3; dpl = seg_desc.dpl; - cpl = ops->cpl(ctxt->vcpu); + cpl = ops->cpl(ctxt); switch (seg) { case VCPU_SREG_SS: @@ -1407,7 +1407,7 @@ static int emulate_popf(struct x86_emulate_ctxt *ctxt, int rc; unsigned long val, change_mask; int iopl = (ctxt->eflags & X86_EFLAGS_IOPL) >> IOPL_SHIFT; - int cpl = ops->cpl(ctxt->vcpu); + int cpl = ops->cpl(ctxt); rc = emulate_pop(ctxt, ops, &val, len); if (rc != X86EMUL_CONTINUE) @@ -1852,7 +1852,7 @@ emulate_syscall(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops) setup_syscalls_segments(ctxt, ops, &cs, &ss); - ops->get_msr(ctxt->vcpu, MSR_STAR, &msr_data); + ops->get_msr(ctxt, MSR_STAR, &msr_data); msr_data >>= 32; cs_sel = (u16)(msr_data & 0xfffc); ss_sel = (u16)(msr_data + 8); @@ -1871,17 +1871,17 @@ emulate_syscall(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops) #ifdef CONFIG_X86_64 c->regs[VCPU_REGS_R11] = ctxt->eflags & ~EFLG_RF; - ops->get_msr(ctxt->vcpu, + ops->get_msr(ctxt, ctxt->mode == X86EMUL_MODE_PROT64 ? MSR_LSTAR : MSR_CSTAR, &msr_data); c->eip = msr_data; - ops->get_msr(ctxt->vcpu, MSR_SYSCALL_MASK, &msr_data); + ops->get_msr(ctxt, MSR_SYSCALL_MASK, &msr_data); ctxt->eflags &= ~(msr_data | EFLG_RF); #endif } else { /* legacy mode */ - ops->get_msr(ctxt->vcpu, MSR_STAR, &msr_data); + ops->get_msr(ctxt, MSR_STAR, &msr_data); c->eip = (u32)msr_data; ctxt->eflags &= ~(EFLG_VM | EFLG_IF | EFLG_RF); @@ -1910,7 +1910,7 @@ emulate_sysenter(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops) setup_syscalls_segments(ctxt, ops, &cs, &ss); - ops->get_msr(ctxt->vcpu, MSR_IA32_SYSENTER_CS, &msr_data); + ops->get_msr(ctxt, MSR_IA32_SYSENTER_CS, &msr_data); switch (ctxt->mode) { case X86EMUL_MODE_PROT32: if ((msr_data & 0xfffc) == 0x0) @@ -1938,10 +1938,10 @@ emulate_sysenter(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops) ops->set_cached_descriptor(ctxt, &ss, 0, VCPU_SREG_SS); ops->set_segment_selector(ctxt, ss_sel, VCPU_SREG_SS); - ops->get_msr(ctxt->vcpu, MSR_IA32_SYSENTER_EIP, &msr_data); + ops->get_msr(ctxt, MSR_IA32_SYSENTER_EIP, &msr_data); c->eip = msr_data; - ops->get_msr(ctxt->vcpu, MSR_IA32_SYSENTER_ESP, &msr_data); + ops->get_msr(ctxt, MSR_IA32_SYSENTER_ESP, &msr_data); c->regs[VCPU_REGS_RSP] = msr_data; return X86EMUL_CONTINUE; @@ -1970,7 +1970,7 @@ emulate_sysexit(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops) cs.dpl = 3; ss.dpl = 3; - ops->get_msr(ctxt->vcpu, MSR_IA32_SYSENTER_CS, &msr_data); + ops->get_msr(ctxt, MSR_IA32_SYSENTER_CS, &msr_data); switch (usermode) { case X86EMUL_MODE_PROT32: cs_sel = (u16)(msr_data + 16); @@ -2010,7 +2010,7 @@ static bool emulator_bad_iopl(struct x86_emulate_ctxt *ctxt, if (ctxt->mode == X86EMUL_MODE_VM86) return true; iopl = (ctxt->eflags & X86_EFLAGS_IOPL) >> IOPL_SHIFT; - return ops->cpl(ctxt->vcpu) > iopl; + return ops->cpl(ctxt) > iopl; } static bool emulator_io_port_access_allowed(struct x86_emulate_ctxt *ctxt, @@ -2187,7 +2187,7 @@ static void save_state_to_tss32(struct x86_emulate_ctxt *ctxt, { struct decode_cache *c = &ctxt->decode; - tss->cr3 = ops->get_cr(3, ctxt->vcpu); + tss->cr3 = ops->get_cr(ctxt, 3); tss->eip = c->eip; tss->eflags = ctxt->eflags; tss->eax = c->regs[VCPU_REGS_RAX]; @@ -2215,7 +2215,7 @@ static int load_state_from_tss32(struct x86_emulate_ctxt *ctxt, struct decode_cache *c = &ctxt->decode; int ret; - if (ops->set_cr(3, tss->cr3, ctxt->vcpu)) + if (ops->set_cr(ctxt, 3, tss->cr3)) return emulate_gp(ctxt, 0); c->eip = tss->eip; ctxt->eflags = tss->eflags | 2; @@ -2338,7 +2338,7 @@ static int emulator_do_task_switch(struct x86_emulate_ctxt *ctxt, if (reason != TASK_SWITCH_IRET) { if ((tss_selector & 3) > next_tss_desc.dpl || - ops->cpl(ctxt->vcpu) > next_tss_desc.dpl) + ops->cpl(ctxt) > next_tss_desc.dpl) return emulate_gp(ctxt, 0); } @@ -2382,7 +2382,7 @@ static int emulator_do_task_switch(struct x86_emulate_ctxt *ctxt, &next_tss_desc); } - ops->set_cr(0, ops->get_cr(0, ctxt->vcpu) | X86_CR0_TS, ctxt->vcpu); + ops->set_cr(ctxt, 0, ops->get_cr(ctxt, 0) | X86_CR0_TS); ops->set_cached_descriptor(ctxt, &next_tss_desc, 0, VCPU_SREG_TR); ops->set_segment_selector(ctxt, tss_selector, VCPU_SREG_TR); @@ -2542,7 +2542,7 @@ static int em_rdtsc(struct x86_emulate_ctxt *ctxt) struct decode_cache *c = &ctxt->decode; u64 tsc = 0; - ctxt->ops->get_msr(ctxt->vcpu, MSR_IA32_TSC, &tsc); + ctxt->ops->get_msr(ctxt, MSR_IA32_TSC, &tsc); c->regs[VCPU_REGS_RAX] = (u32)tsc; c->regs[VCPU_REGS_RDX] = tsc >> 32; return X86EMUL_CONTINUE; @@ -2625,8 +2625,8 @@ static int check_cr_write(struct x86_emulate_ctxt *ctxt) ((new_val & X86_CR0_NW) && !(new_val & X86_CR0_CD))) return emulate_gp(ctxt, 0); - cr4 = ctxt->ops->get_cr(4, ctxt->vcpu); - ctxt->ops->get_msr(ctxt->vcpu, MSR_EFER, &efer); + cr4 = ctxt->ops->get_cr(ctxt, 4); + ctxt->ops->get_msr(ctxt, MSR_EFER, &efer); if ((new_val & X86_CR0_PG) && (efer & EFER_LME) && !(cr4 & X86_CR4_PAE)) @@ -2652,8 +2652,8 @@ static int check_cr_write(struct x86_emulate_ctxt *ctxt) case 4: { u64 cr4, efer; - cr4 = ctxt->ops->get_cr(4, ctxt->vcpu); - ctxt->ops->get_msr(ctxt->vcpu, MSR_EFER, &efer); + cr4 = ctxt->ops->get_cr(ctxt, 4); + ctxt->ops->get_msr(ctxt, MSR_EFER, &efer); if ((efer & EFER_LMA) && !(new_val & X86_CR4_PAE)) return emulate_gp(ctxt, 0); @@ -2669,7 +2669,7 @@ static int check_dr7_gd(struct x86_emulate_ctxt *ctxt) { unsigned long dr7; - ctxt->ops->get_dr(7, &dr7, ctxt->vcpu); + ctxt->ops->get_dr(ctxt, 7, &dr7); /* Check if DR7.Global_Enable is set */ return dr7 & (1 << 13); @@ -2684,7 +2684,7 @@ static int check_dr_read(struct x86_emulate_ctxt *ctxt) if (dr > 7) return emulate_ud(ctxt); - cr4 = ctxt->ops->get_cr(4, ctxt->vcpu); + cr4 = ctxt->ops->get_cr(ctxt, 4); if ((cr4 & X86_CR4_DE) && (dr == 4 || dr == 5)) return emulate_ud(ctxt); @@ -2710,7 +2710,7 @@ static int check_svme(struct x86_emulate_ctxt *ctxt) { u64 efer; - ctxt->ops->get_msr(ctxt->vcpu, MSR_EFER, &efer); + ctxt->ops->get_msr(ctxt, MSR_EFER, &efer); if (!(efer & EFER_SVME)) return emulate_ud(ctxt); @@ -2731,9 +2731,9 @@ static int check_svme_pa(struct x86_emulate_ctxt *ctxt) static int check_rdtsc(struct x86_emulate_ctxt *ctxt) { - u64 cr4 = ctxt->ops->get_cr(4, ctxt->vcpu); + u64 cr4 = ctxt->ops->get_cr(ctxt, 4); - if (cr4 & X86_CR4_TSD && ctxt->ops->cpl(ctxt->vcpu)) + if (cr4 & X86_CR4_TSD && ctxt->ops->cpl(ctxt)) return emulate_ud(ctxt); return X86EMUL_CONTINUE; @@ -2741,10 +2741,10 @@ static int check_rdtsc(struct x86_emulate_ctxt *ctxt) static int check_rdpmc(struct x86_emulate_ctxt *ctxt) { - u64 cr4 = ctxt->ops->get_cr(4, ctxt->vcpu); + u64 cr4 = ctxt->ops->get_cr(ctxt, 4); u64 rcx = kvm_register_read(ctxt->vcpu, VCPU_REGS_RCX); - if ((!(cr4 & X86_CR4_PCE) && ctxt->ops->cpl(ctxt->vcpu)) || + if ((!(cr4 & X86_CR4_PCE) && ctxt->ops->cpl(ctxt)) || (rcx > 3)) return emulate_gp(ctxt, 0); @@ -3514,13 +3514,13 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt) } if ((c->d & Sse) - && ((ops->get_cr(0, ctxt->vcpu) & X86_CR0_EM) - || !(ops->get_cr(4, ctxt->vcpu) & X86_CR4_OSFXSR))) { + && ((ops->get_cr(ctxt, 0) & X86_CR0_EM) + || !(ops->get_cr(ctxt, 4) & X86_CR4_OSFXSR))) { rc = emulate_ud(ctxt); goto done; } - if ((c->d & Sse) && (ops->get_cr(0, ctxt->vcpu) & X86_CR0_TS)) { + if ((c->d & Sse) && (ops->get_cr(ctxt, 0) & X86_CR0_TS)) { rc = emulate_nm(ctxt); goto done; } @@ -3533,7 +3533,7 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt) } /* Privileged instruction can be executed only in CPL=0 */ - if ((c->d & Priv) && ops->cpl(ctxt->vcpu)) { + if ((c->d & Priv) && ops->cpl(ctxt)) { rc = emulate_gp(ctxt, 0); goto done; } @@ -4052,11 +4052,11 @@ twobyte_insn: break; case 4: /* smsw */ c->dst.bytes = 2; - c->dst.val = ops->get_cr(0, ctxt->vcpu); + c->dst.val = ops->get_cr(ctxt, 0); break; case 6: /* lmsw */ - ops->set_cr(0, (ops->get_cr(0, ctxt->vcpu) & ~0x0eul) | - (c->src.val & 0x0f), ctxt->vcpu); + ops->set_cr(ctxt, 0, (ops->get_cr(ctxt, 0) & ~0x0eul) | + (c->src.val & 0x0f)); c->dst.type = OP_NONE; break; case 5: /* not defined */ @@ -4084,13 +4084,13 @@ twobyte_insn: case 0x18: /* Grp16 (prefetch/nop) */ break; case 0x20: /* mov cr, reg */ - c->dst.val = ops->get_cr(c->modrm_reg, ctxt->vcpu); + c->dst.val = ops->get_cr(ctxt, c->modrm_reg); break; case 0x21: /* mov from dr to reg */ - ops->get_dr(c->modrm_reg, &c->dst.val, ctxt->vcpu); + ops->get_dr(ctxt, c->modrm_reg, &c->dst.val); break; case 0x22: /* mov reg, cr */ - if (ops->set_cr(c->modrm_reg, c->src.val, ctxt->vcpu)) { + if (ops->set_cr(ctxt, c->modrm_reg, c->src.val)) { emulate_gp(ctxt, 0); rc = X86EMUL_PROPAGATE_FAULT; goto done; @@ -4098,9 +4098,9 @@ twobyte_insn: c->dst.type = OP_NONE; break; case 0x23: /* mov from reg to dr */ - if (ops->set_dr(c->modrm_reg, c->src.val & + if (ops->set_dr(ctxt, c->modrm_reg, c->src.val & ((ctxt->mode == X86EMUL_MODE_PROT64) ? - ~0ULL : ~0U), ctxt->vcpu) < 0) { + ~0ULL : ~0U)) < 0) { /* #UD condition is already handled by the code above */ emulate_gp(ctxt, 0); rc = X86EMUL_PROPAGATE_FAULT; @@ -4113,7 +4113,7 @@ twobyte_insn: /* wrmsr */ msr_data = (u32)c->regs[VCPU_REGS_RAX] | ((u64)c->regs[VCPU_REGS_RDX] << 32); - if (ops->set_msr(ctxt->vcpu, c->regs[VCPU_REGS_RCX], msr_data)) { + if (ops->set_msr(ctxt, c->regs[VCPU_REGS_RCX], msr_data)) { emulate_gp(ctxt, 0); rc = X86EMUL_PROPAGATE_FAULT; goto done; @@ -4122,7 +4122,7 @@ twobyte_insn: break; case 0x32: /* rdmsr */ - if (ops->get_msr(ctxt->vcpu, c->regs[VCPU_REGS_RCX], &msr_data)) { + if (ops->get_msr(ctxt, c->regs[VCPU_REGS_RCX], &msr_data)) { emulate_gp(ctxt, 0); rc = X86EMUL_PROPAGATE_FAULT; goto done; diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 6a7fbf671b26..16373a5bfd01 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -4160,15 +4160,15 @@ int emulate_clts(struct kvm_vcpu *vcpu) return X86EMUL_CONTINUE; } -int emulator_get_dr(int dr, unsigned long *dest, struct kvm_vcpu *vcpu) +int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long *dest) { - return _kvm_get_dr(vcpu, dr, dest); + return _kvm_get_dr(emul_to_vcpu(ctxt), dr, dest); } -int emulator_set_dr(int dr, unsigned long value, struct kvm_vcpu *vcpu) +int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value) { - return __kvm_set_dr(vcpu, dr, value); + return __kvm_set_dr(emul_to_vcpu(ctxt), dr, value); } static u64 mk_cr_64(u64 curr_cr, u32 new_val) @@ -4176,8 +4176,9 @@ static u64 mk_cr_64(u64 curr_cr, u32 new_val) return (curr_cr & ~((1ULL << 32) - 1)) | new_val; } -static unsigned long emulator_get_cr(int cr, struct kvm_vcpu *vcpu) +static unsigned long emulator_get_cr(struct x86_emulate_ctxt *ctxt, int cr) { + struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); unsigned long value; switch (cr) { @@ -4204,8 +4205,9 @@ static unsigned long emulator_get_cr(int cr, struct kvm_vcpu *vcpu) return value; } -static int emulator_set_cr(int cr, unsigned long val, struct kvm_vcpu *vcpu) +static int emulator_set_cr(struct x86_emulate_ctxt *ctxt, int cr, ulong val) { + struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); int res = 0; switch (cr) { @@ -4232,9 +4234,9 @@ static int emulator_set_cr(int cr, unsigned long val, struct kvm_vcpu *vcpu) return res; } -static int emulator_get_cpl(struct kvm_vcpu *vcpu) +static int emulator_get_cpl(struct x86_emulate_ctxt *ctxt) { - return kvm_x86_ops->get_cpl(vcpu); + return kvm_x86_ops->get_cpl(emul_to_vcpu(ctxt)); } static void emulator_get_gdt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) @@ -4335,6 +4337,18 @@ static void emulator_set_segment_selector(struct x86_emulate_ctxt *ctxt, kvm_set_segment(emul_to_vcpu(ctxt), &kvm_seg, seg); } +static int emulator_get_msr(struct x86_emulate_ctxt *ctxt, + u32 msr_index, u64 *pdata) +{ + return kvm_get_msr(emul_to_vcpu(ctxt), msr_index, pdata); +} + +static int emulator_set_msr(struct x86_emulate_ctxt *ctxt, + u32 msr_index, u64 data) +{ + return kvm_set_msr(emul_to_vcpu(ctxt), msr_index, data); +} + static void emulator_get_fpu(struct x86_emulate_ctxt *ctxt) { preempt_disable(); @@ -4379,8 +4393,8 @@ static struct x86_emulate_ops emulate_ops = { .cpl = emulator_get_cpl, .get_dr = emulator_get_dr, .set_dr = emulator_set_dr, - .set_msr = kvm_set_msr, - .get_msr = kvm_get_msr, + .set_msr = emulator_set_msr, + .get_msr = emulator_get_msr, .get_fpu = emulator_get_fpu, .put_fpu = emulator_put_fpu, .intercept = emulator_intercept, -- 2.20.1