From: Avi Kivity Date: Wed, 20 Apr 2011 10:37:53 +0000 (+0300) Subject: KVM: x86 emulator: drop vcpu argument from segment/gdt/idt callbacks X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=4bff1e86ad286d4b3a54902540abeeaf95e64db3;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git KVM: x86 emulator: drop vcpu argument from segment/gdt/idt callbacks Making the emulator caller agnostic. [Takuya Yoshikawa: fix typo leading to LDT failures] Signed-off-by: Takuya Yoshikawa Signed-off-by: Avi Kivity --- diff --git a/arch/x86/include/asm/kvm_emulate.h b/arch/x86/include/asm/kvm_emulate.h index 1348bdf14a4..656046a1bd5 100644 --- a/arch/x86/include/asm/kvm_emulate.h +++ b/arch/x86/include/asm/kvm_emulate.h @@ -163,15 +163,19 @@ struct x86_emulate_ops { int size, unsigned short port, const void *val, unsigned int count); - bool (*get_cached_descriptor)(struct desc_struct *desc, u32 *base3, - int seg, struct kvm_vcpu *vcpu); - void (*set_cached_descriptor)(struct desc_struct *desc, u32 base3, - int seg, struct kvm_vcpu *vcpu); - u16 (*get_segment_selector)(int seg, struct kvm_vcpu *vcpu); - void (*set_segment_selector)(u16 sel, int seg, struct kvm_vcpu *vcpu); - unsigned long (*get_cached_segment_base)(int seg, struct kvm_vcpu *vcpu); - void (*get_gdt)(struct desc_ptr *dt, struct kvm_vcpu *vcpu); - void (*get_idt)(struct desc_ptr *dt, struct kvm_vcpu *vcpu); + bool (*get_cached_descriptor)(struct x86_emulate_ctxt *ctxt, + struct desc_struct *desc, u32 *base3, + int seg); + void (*set_cached_descriptor)(struct x86_emulate_ctxt *ctxt, + struct desc_struct *desc, u32 base3, + int seg); + u16 (*get_segment_selector)(struct x86_emulate_ctxt *ctxt, int seg); + void (*set_segment_selector)(struct x86_emulate_ctxt *ctxt, + u16 sel, int seg); + unsigned long (*get_cached_segment_base)(struct x86_emulate_ctxt *ctxt, + 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); diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index 8af08a16f4d..9602889f0f7 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -495,7 +495,7 @@ static unsigned long seg_base(struct x86_emulate_ctxt *ctxt, if (ctxt->mode == X86EMUL_MODE_PROT64 && seg < VCPU_SREG_FS) return 0; - return ops->get_cached_segment_base(seg, ctxt->vcpu); + return ops->get_cached_segment_base(ctxt, seg); } static unsigned seg_override(struct x86_emulate_ctxt *ctxt, @@ -573,8 +573,8 @@ static int __linearize(struct x86_emulate_ctxt *ctxt, return emulate_gp(ctxt, 0); break; default: - usable = ctxt->ops->get_cached_descriptor(&desc, NULL, addr.seg, - ctxt->vcpu); + usable = ctxt->ops->get_cached_descriptor(ctxt, &desc, NULL, + addr.seg); if (!usable) goto bad; /* code segment or read-only data segment */ @@ -597,7 +597,7 @@ static int __linearize(struct x86_emulate_ctxt *ctxt, goto bad; } cpl = ctxt->ops->cpl(ctxt->vcpu); - rpl = ctxt->ops->get_segment_selector(addr.seg, ctxt->vcpu) & 3; + rpl = ctxt->ops->get_segment_selector(ctxt, addr.seg) & 3; cpl = max(cpl, rpl); if (!(desc.type & 8)) { /* data segment */ @@ -1142,14 +1142,14 @@ static void get_descriptor_table_ptr(struct x86_emulate_ctxt *ctxt, if (selector & 1 << 2) { struct desc_struct desc; memset (dt, 0, sizeof *dt); - if (!ops->get_cached_descriptor(&desc, NULL, VCPU_SREG_LDTR, - ctxt->vcpu)) + if (!ops->get_cached_descriptor(ctxt, &desc, NULL, + VCPU_SREG_LDTR)) return; dt->size = desc_limit_scaled(&desc); /* what if limit > 65535? */ dt->address = get_desc_base(&desc); } else - ops->get_gdt(dt, ctxt->vcpu); + ops->get_gdt(ctxt, dt); } /* allowed just for 8 bytes segments */ @@ -1304,8 +1304,8 @@ static int load_segment_descriptor(struct x86_emulate_ctxt *ctxt, return ret; } load: - ops->set_segment_selector(selector, seg, ctxt->vcpu); - ops->set_cached_descriptor(&seg_desc, 0, seg, ctxt->vcpu); + ops->set_segment_selector(ctxt, selector, seg); + ops->set_cached_descriptor(ctxt, &seg_desc, 0, seg); return X86EMUL_CONTINUE; exception: emulate_exception(ctxt, err_vec, err_code, true); @@ -1446,7 +1446,7 @@ static int emulate_push_sreg(struct x86_emulate_ctxt *ctxt, { struct decode_cache *c = &ctxt->decode; - c->src.val = ops->get_segment_selector(seg, ctxt->vcpu); + c->src.val = ops->get_segment_selector(ctxt, seg); return em_push(ctxt); } @@ -1527,7 +1527,7 @@ int emulate_int_real(struct x86_emulate_ctxt *ctxt, ctxt->eflags &= ~(EFLG_IF | EFLG_TF | EFLG_AC); - c->src.val = ops->get_segment_selector(VCPU_SREG_CS, ctxt->vcpu); + c->src.val = ops->get_segment_selector(ctxt, VCPU_SREG_CS); rc = em_push(ctxt); if (rc != X86EMUL_CONTINUE) return rc; @@ -1537,7 +1537,7 @@ int emulate_int_real(struct x86_emulate_ctxt *ctxt, if (rc != X86EMUL_CONTINUE) return rc; - ops->get_idt(&dt, ctxt->vcpu); + ops->get_idt(ctxt, &dt); eip_addr = dt.address + (irq << 2); cs_addr = dt.address + (irq << 2) + 2; @@ -1814,7 +1814,7 @@ setup_syscalls_segments(struct x86_emulate_ctxt *ctxt, struct desc_struct *ss) { memset(cs, 0, sizeof(struct desc_struct)); - ops->get_cached_descriptor(cs, NULL, VCPU_SREG_CS, ctxt->vcpu); + ops->get_cached_descriptor(ctxt, cs, NULL, VCPU_SREG_CS); memset(ss, 0, sizeof(struct desc_struct)); cs->l = 0; /* will be adjusted later */ @@ -1861,10 +1861,10 @@ emulate_syscall(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops) cs.d = 0; cs.l = 1; } - ops->set_cached_descriptor(&cs, 0, VCPU_SREG_CS, ctxt->vcpu); - ops->set_segment_selector(cs_sel, VCPU_SREG_CS, ctxt->vcpu); - ops->set_cached_descriptor(&ss, 0, VCPU_SREG_SS, ctxt->vcpu); - ops->set_segment_selector(ss_sel, VCPU_SREG_SS, ctxt->vcpu); + ops->set_cached_descriptor(ctxt, &cs, 0, VCPU_SREG_CS); + ops->set_segment_selector(ctxt, cs_sel, VCPU_SREG_CS); + ops->set_cached_descriptor(ctxt, &ss, 0, VCPU_SREG_SS); + ops->set_segment_selector(ctxt, ss_sel, VCPU_SREG_SS); c->regs[VCPU_REGS_RCX] = c->eip; if (is_long_mode(ctxt->vcpu)) { @@ -1933,10 +1933,10 @@ emulate_sysenter(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops) cs.l = 1; } - ops->set_cached_descriptor(&cs, 0, VCPU_SREG_CS, ctxt->vcpu); - ops->set_segment_selector(cs_sel, VCPU_SREG_CS, ctxt->vcpu); - ops->set_cached_descriptor(&ss, 0, VCPU_SREG_SS, ctxt->vcpu); - ops->set_segment_selector(ss_sel, VCPU_SREG_SS, ctxt->vcpu); + ops->set_cached_descriptor(ctxt, &cs, 0, VCPU_SREG_CS); + ops->set_segment_selector(ctxt, cs_sel, VCPU_SREG_CS); + 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); c->eip = msr_data; @@ -1990,10 +1990,10 @@ emulate_sysexit(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops) cs_sel |= SELECTOR_RPL_MASK; ss_sel |= SELECTOR_RPL_MASK; - ops->set_cached_descriptor(&cs, 0, VCPU_SREG_CS, ctxt->vcpu); - ops->set_segment_selector(cs_sel, VCPU_SREG_CS, ctxt->vcpu); - ops->set_cached_descriptor(&ss, 0, VCPU_SREG_SS, ctxt->vcpu); - ops->set_segment_selector(ss_sel, VCPU_SREG_SS, ctxt->vcpu); + ops->set_cached_descriptor(ctxt, &cs, 0, VCPU_SREG_CS); + ops->set_segment_selector(ctxt, cs_sel, VCPU_SREG_CS); + ops->set_cached_descriptor(ctxt, &ss, 0, VCPU_SREG_SS); + ops->set_segment_selector(ctxt, ss_sel, VCPU_SREG_SS); c->eip = c->regs[VCPU_REGS_RDX]; c->regs[VCPU_REGS_RSP] = c->regs[VCPU_REGS_RCX]; @@ -2024,7 +2024,7 @@ static bool emulator_io_port_access_allowed(struct x86_emulate_ctxt *ctxt, unsigned mask = (1 << len) - 1; unsigned long base; - ops->get_cached_descriptor(&tr_seg, &base3, VCPU_SREG_TR, ctxt->vcpu); + ops->get_cached_descriptor(ctxt, &tr_seg, &base3, VCPU_SREG_TR); if (!tr_seg.p) return false; if (desc_limit_scaled(&tr_seg) < 103) @@ -2079,11 +2079,11 @@ static void save_state_to_tss16(struct x86_emulate_ctxt *ctxt, tss->si = c->regs[VCPU_REGS_RSI]; tss->di = c->regs[VCPU_REGS_RDI]; - tss->es = ops->get_segment_selector(VCPU_SREG_ES, ctxt->vcpu); - tss->cs = ops->get_segment_selector(VCPU_SREG_CS, ctxt->vcpu); - tss->ss = ops->get_segment_selector(VCPU_SREG_SS, ctxt->vcpu); - tss->ds = ops->get_segment_selector(VCPU_SREG_DS, ctxt->vcpu); - tss->ldt = ops->get_segment_selector(VCPU_SREG_LDTR, ctxt->vcpu); + tss->es = ops->get_segment_selector(ctxt, VCPU_SREG_ES); + tss->cs = ops->get_segment_selector(ctxt, VCPU_SREG_CS); + tss->ss = ops->get_segment_selector(ctxt, VCPU_SREG_SS); + tss->ds = ops->get_segment_selector(ctxt, VCPU_SREG_DS); + tss->ldt = ops->get_segment_selector(ctxt, VCPU_SREG_LDTR); } static int load_state_from_tss16(struct x86_emulate_ctxt *ctxt, @@ -2108,11 +2108,11 @@ static int load_state_from_tss16(struct x86_emulate_ctxt *ctxt, * SDM says that segment selectors are loaded before segment * descriptors */ - ops->set_segment_selector(tss->ldt, VCPU_SREG_LDTR, ctxt->vcpu); - ops->set_segment_selector(tss->es, VCPU_SREG_ES, ctxt->vcpu); - ops->set_segment_selector(tss->cs, VCPU_SREG_CS, ctxt->vcpu); - ops->set_segment_selector(tss->ss, VCPU_SREG_SS, ctxt->vcpu); - ops->set_segment_selector(tss->ds, VCPU_SREG_DS, ctxt->vcpu); + ops->set_segment_selector(ctxt, tss->ldt, VCPU_SREG_LDTR); + ops->set_segment_selector(ctxt, tss->es, VCPU_SREG_ES); + ops->set_segment_selector(ctxt, tss->cs, VCPU_SREG_CS); + ops->set_segment_selector(ctxt, tss->ss, VCPU_SREG_SS); + ops->set_segment_selector(ctxt, tss->ds, VCPU_SREG_DS); /* * Now load segment descriptors. If fault happenes at this stage @@ -2199,13 +2199,13 @@ static void save_state_to_tss32(struct x86_emulate_ctxt *ctxt, tss->esi = c->regs[VCPU_REGS_RSI]; tss->edi = c->regs[VCPU_REGS_RDI]; - tss->es = ops->get_segment_selector(VCPU_SREG_ES, ctxt->vcpu); - tss->cs = ops->get_segment_selector(VCPU_SREG_CS, ctxt->vcpu); - tss->ss = ops->get_segment_selector(VCPU_SREG_SS, ctxt->vcpu); - tss->ds = ops->get_segment_selector(VCPU_SREG_DS, ctxt->vcpu); - tss->fs = ops->get_segment_selector(VCPU_SREG_FS, ctxt->vcpu); - tss->gs = ops->get_segment_selector(VCPU_SREG_GS, ctxt->vcpu); - tss->ldt_selector = ops->get_segment_selector(VCPU_SREG_LDTR, ctxt->vcpu); + tss->es = ops->get_segment_selector(ctxt, VCPU_SREG_ES); + tss->cs = ops->get_segment_selector(ctxt, VCPU_SREG_CS); + tss->ss = ops->get_segment_selector(ctxt, VCPU_SREG_SS); + tss->ds = ops->get_segment_selector(ctxt, VCPU_SREG_DS); + tss->fs = ops->get_segment_selector(ctxt, VCPU_SREG_FS); + tss->gs = ops->get_segment_selector(ctxt, VCPU_SREG_GS); + tss->ldt_selector = ops->get_segment_selector(ctxt, VCPU_SREG_LDTR); } static int load_state_from_tss32(struct x86_emulate_ctxt *ctxt, @@ -2232,13 +2232,13 @@ static int load_state_from_tss32(struct x86_emulate_ctxt *ctxt, * SDM says that segment selectors are loaded before segment * descriptors */ - ops->set_segment_selector(tss->ldt_selector, VCPU_SREG_LDTR, ctxt->vcpu); - ops->set_segment_selector(tss->es, VCPU_SREG_ES, ctxt->vcpu); - ops->set_segment_selector(tss->cs, VCPU_SREG_CS, ctxt->vcpu); - ops->set_segment_selector(tss->ss, VCPU_SREG_SS, ctxt->vcpu); - ops->set_segment_selector(tss->ds, VCPU_SREG_DS, ctxt->vcpu); - ops->set_segment_selector(tss->fs, VCPU_SREG_FS, ctxt->vcpu); - ops->set_segment_selector(tss->gs, VCPU_SREG_GS, ctxt->vcpu); + ops->set_segment_selector(ctxt, tss->ldt_selector, VCPU_SREG_LDTR); + ops->set_segment_selector(ctxt, tss->es, VCPU_SREG_ES); + ops->set_segment_selector(ctxt, tss->cs, VCPU_SREG_CS); + ops->set_segment_selector(ctxt, tss->ss, VCPU_SREG_SS); + ops->set_segment_selector(ctxt, tss->ds, VCPU_SREG_DS); + ops->set_segment_selector(ctxt, tss->fs, VCPU_SREG_FS); + ops->set_segment_selector(ctxt, tss->gs, VCPU_SREG_GS); /* * Now load segment descriptors. If fault happenes at this stage @@ -2320,9 +2320,9 @@ static int emulator_do_task_switch(struct x86_emulate_ctxt *ctxt, { struct desc_struct curr_tss_desc, next_tss_desc; int ret; - u16 old_tss_sel = ops->get_segment_selector(VCPU_SREG_TR, ctxt->vcpu); + u16 old_tss_sel = ops->get_segment_selector(ctxt, VCPU_SREG_TR); ulong old_tss_base = - ops->get_cached_segment_base(VCPU_SREG_TR, ctxt->vcpu); + ops->get_cached_segment_base(ctxt, VCPU_SREG_TR); u32 desc_limit; /* FIXME: old_tss_base == ~0 ? */ @@ -2383,8 +2383,8 @@ static int emulator_do_task_switch(struct x86_emulate_ctxt *ctxt, } ops->set_cr(0, ops->get_cr(0, ctxt->vcpu) | X86_CR0_TS, ctxt->vcpu); - ops->set_cached_descriptor(&next_tss_desc, 0, VCPU_SREG_TR, ctxt->vcpu); - ops->set_segment_selector(tss_selector, VCPU_SREG_TR, ctxt->vcpu); + ops->set_cached_descriptor(ctxt, &next_tss_desc, 0, VCPU_SREG_TR); + ops->set_segment_selector(ctxt, tss_selector, VCPU_SREG_TR); if (has_error_code) { struct decode_cache *c = &ctxt->decode; @@ -2475,7 +2475,7 @@ static int em_call_far(struct x86_emulate_ctxt *ctxt) ulong old_eip; int rc; - old_cs = ctxt->ops->get_segment_selector(VCPU_SREG_CS, ctxt->vcpu); + old_cs = ctxt->ops->get_segment_selector(ctxt, VCPU_SREG_CS); old_eip = c->eip; memcpy(&sel, c->src.valptr + c->op_bytes, 2); @@ -3743,7 +3743,7 @@ special_insn: rc = emulate_ud(ctxt); goto done; } - c->dst.val = ops->get_segment_selector(c->modrm_reg, ctxt->vcpu); + c->dst.val = ops->get_segment_selector(ctxt, c->modrm_reg); break; case 0x8d: /* lea r16/r32, m */ c->dst.val = c->src.addr.mem.ea; diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index e9040a9b25c..6a7fbf671b2 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -4237,28 +4237,29 @@ static int emulator_get_cpl(struct kvm_vcpu *vcpu) return kvm_x86_ops->get_cpl(vcpu); } -static void emulator_get_gdt(struct desc_ptr *dt, struct kvm_vcpu *vcpu) +static void emulator_get_gdt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) { - kvm_x86_ops->get_gdt(vcpu, dt); + kvm_x86_ops->get_gdt(emul_to_vcpu(ctxt), dt); } -static void emulator_get_idt(struct desc_ptr *dt, struct kvm_vcpu *vcpu) +static void emulator_get_idt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) { - kvm_x86_ops->get_idt(vcpu, dt); + kvm_x86_ops->get_idt(emul_to_vcpu(ctxt), dt); } -static unsigned long emulator_get_cached_segment_base(int seg, - struct kvm_vcpu *vcpu) +static unsigned long emulator_get_cached_segment_base( + struct x86_emulate_ctxt *ctxt, int seg) { - return get_segment_base(vcpu, seg); + return get_segment_base(emul_to_vcpu(ctxt), seg); } -static bool emulator_get_cached_descriptor(struct desc_struct *desc, u32 *base3, - int seg, struct kvm_vcpu *vcpu) +static bool emulator_get_cached_descriptor(struct x86_emulate_ctxt *ctxt, + struct desc_struct *desc, u32 *base3, + int seg) { struct kvm_segment var; - kvm_get_segment(vcpu, &var, seg); + kvm_get_segment(emul_to_vcpu(ctxt), &var, seg); if (var.unusable) return false; @@ -4283,9 +4284,11 @@ static bool emulator_get_cached_descriptor(struct desc_struct *desc, u32 *base3, return true; } -static void emulator_set_cached_descriptor(struct desc_struct *desc, u32 base3, - int seg, struct kvm_vcpu *vcpu) +static void emulator_set_cached_descriptor(struct x86_emulate_ctxt *ctxt, + struct desc_struct *desc, u32 base3, + int seg) { + struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); struct kvm_segment var; /* needed to preserve selector */ @@ -4314,22 +4317,22 @@ static void emulator_set_cached_descriptor(struct desc_struct *desc, u32 base3, return; } -static u16 emulator_get_segment_selector(int seg, struct kvm_vcpu *vcpu) +static u16 emulator_get_segment_selector(struct x86_emulate_ctxt *ctxt, int seg) { struct kvm_segment kvm_seg; - kvm_get_segment(vcpu, &kvm_seg, seg); + kvm_get_segment(emul_to_vcpu(ctxt), &kvm_seg, seg); return kvm_seg.selector; } -static void emulator_set_segment_selector(u16 sel, int seg, - struct kvm_vcpu *vcpu) +static void emulator_set_segment_selector(struct x86_emulate_ctxt *ctxt, + u16 sel, int seg) { struct kvm_segment kvm_seg; - kvm_get_segment(vcpu, &kvm_seg, seg); + kvm_get_segment(emul_to_vcpu(ctxt), &kvm_seg, seg); kvm_seg.selector = sel; - kvm_set_segment(vcpu, &kvm_seg, seg); + kvm_set_segment(emul_to_vcpu(ctxt), &kvm_seg, seg); } static void emulator_get_fpu(struct x86_emulate_ctxt *ctxt)