From 3090dd7377c7eb5cbe229e2a538f9dc7e5b06814 Mon Sep 17 00:00:00 2001 From: Laurent Vivier Date: Sun, 5 Aug 2007 10:43:32 +0300 Subject: [PATCH] KVM: Clean up kvm_setup_pio() Split kvm_setup_pio() into two functions, one to setup in/out pio (kvm_emulate_pio()) and one to setup ins/outs pio (kvm_emulate_pio_string()). Signed-off-by: Laurent Vivier Signed-off-by: Avi Kivity --- drivers/kvm/kvm.h | 8 +++-- drivers/kvm/kvm_main.c | 63 ++++++++++++++++++++++++--------------- drivers/kvm/svm.c | 3 +- drivers/kvm/vmx.c | 3 +- drivers/kvm/x86_emulate.c | 6 ++-- 5 files changed, 48 insertions(+), 35 deletions(-) diff --git a/drivers/kvm/kvm.h b/drivers/kvm/kvm.h index 6d258261891e..2245baeeb022 100644 --- a/drivers/kvm/kvm.h +++ b/drivers/kvm/kvm.h @@ -539,9 +539,11 @@ int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data); struct x86_emulate_ctxt; -int kvm_setup_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in, - int size, unsigned long count, int string, int down, - gva_t address, int rep, unsigned port); +int kvm_emulate_pio (struct kvm_vcpu *vcpu, struct kvm_run *run, int in, + int size, unsigned port); +int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in, + int size, unsigned long count, int down, + gva_t address, int rep, unsigned port); void kvm_emulate_cpuid(struct kvm_vcpu *vcpu); int kvm_emulate_halt(struct kvm_vcpu *vcpu); int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address); diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c index 661d065fd866..d154487b7729 100644 --- a/drivers/kvm/kvm_main.c +++ b/drivers/kvm/kvm_main.c @@ -1735,8 +1735,39 @@ static void pio_string_write(struct kvm_io_device *pio_dev, } } -int kvm_setup_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in, - int size, unsigned long count, int string, int down, +int kvm_emulate_pio (struct kvm_vcpu *vcpu, struct kvm_run *run, int in, + int size, unsigned port) +{ + struct kvm_io_device *pio_dev; + + vcpu->run->exit_reason = KVM_EXIT_IO; + vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT; + vcpu->run->io.size = vcpu->pio.size = size; + vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; + vcpu->run->io.count = vcpu->pio.count = vcpu->pio.cur_count = 1; + vcpu->run->io.port = vcpu->pio.port = port; + vcpu->pio.in = in; + vcpu->pio.string = 0; + vcpu->pio.down = 0; + vcpu->pio.guest_page_offset = 0; + vcpu->pio.rep = 0; + + kvm_arch_ops->cache_regs(vcpu); + memcpy(vcpu->pio_data, &vcpu->regs[VCPU_REGS_RAX], 4); + kvm_arch_ops->decache_regs(vcpu); + + pio_dev = vcpu_find_pio_dev(vcpu, port); + if (pio_dev) { + kernel_pio(pio_dev, vcpu, vcpu->pio_data); + complete_pio(vcpu); + return 1; + } + return 0; +} +EXPORT_SYMBOL_GPL(kvm_emulate_pio); + +int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in, + int size, unsigned long count, int down, gva_t address, int rep, unsigned port) { unsigned now, in_page; @@ -1747,33 +1778,16 @@ int kvm_setup_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in, vcpu->run->exit_reason = KVM_EXIT_IO; vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT; - vcpu->run->io.size = size; + vcpu->run->io.size = vcpu->pio.size = size; vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; - vcpu->run->io.count = count; - vcpu->run->io.port = port; - vcpu->pio.count = count; - vcpu->pio.cur_count = count; - vcpu->pio.size = size; + vcpu->run->io.count = vcpu->pio.count = vcpu->pio.cur_count = count; + vcpu->run->io.port = vcpu->pio.port = port; vcpu->pio.in = in; - vcpu->pio.port = port; - vcpu->pio.string = string; + vcpu->pio.string = 1; vcpu->pio.down = down; vcpu->pio.guest_page_offset = offset_in_page(address); vcpu->pio.rep = rep; - pio_dev = vcpu_find_pio_dev(vcpu, port); - if (!string) { - kvm_arch_ops->cache_regs(vcpu); - memcpy(vcpu->pio_data, &vcpu->regs[VCPU_REGS_RAX], 4); - kvm_arch_ops->decache_regs(vcpu); - if (pio_dev) { - kernel_pio(pio_dev, vcpu, vcpu->pio_data); - complete_pio(vcpu); - return 1; - } - return 0; - } - if (!count) { kvm_arch_ops->skip_emulated_instruction(vcpu); return 1; @@ -1818,6 +1832,7 @@ int kvm_setup_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in, } } + pio_dev = vcpu_find_pio_dev(vcpu, port); if (!vcpu->pio.in) { /* string PIO write */ ret = pio_copy_data(vcpu); @@ -1834,7 +1849,7 @@ int kvm_setup_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in, return ret; } -EXPORT_SYMBOL_GPL(kvm_setup_pio); +EXPORT_SYMBOL_GPL(kvm_emulate_pio_string); static int kvm_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) { diff --git a/drivers/kvm/svm.c b/drivers/kvm/svm.c index a83ff01bb014..e3c6d891326b 100644 --- a/drivers/kvm/svm.c +++ b/drivers/kvm/svm.c @@ -1005,8 +1005,7 @@ static int io_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run) rep = (io_info & SVM_IOIO_REP_MASK) != 0; down = (svm->vmcb->save.rflags & X86_EFLAGS_DF) != 0; - return kvm_setup_pio(&svm->vcpu, kvm_run, in, size, 1, 0, - down, 0, rep, port); + return kvm_emulate_pio(&svm->vcpu, kvm_run, in, size, port); } static int nop_on_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run) diff --git a/drivers/kvm/vmx.c b/drivers/kvm/vmx.c index 044722bc1a7f..906d4fa13d10 100644 --- a/drivers/kvm/vmx.c +++ b/drivers/kvm/vmx.c @@ -1785,8 +1785,7 @@ static int handle_io(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) rep = (exit_qualification & 32) != 0; port = exit_qualification >> 16; - return kvm_setup_pio(vcpu, kvm_run, in, size, 1, 0, down, - 0, rep, port); + return kvm_emulate_pio(vcpu, kvm_run, in, size, port); } static void diff --git a/drivers/kvm/x86_emulate.c b/drivers/kvm/x86_emulate.c index d553719fc4cb..b4f439cfc66e 100644 --- a/drivers/kvm/x86_emulate.c +++ b/drivers/kvm/x86_emulate.c @@ -1123,12 +1123,11 @@ special_insn: switch(b) { case 0x6c: /* insb */ case 0x6d: /* insw/insd */ - if (kvm_setup_pio(ctxt->vcpu, NULL, + if (kvm_emulate_pio_string(ctxt->vcpu, NULL, 1, /* in */ (d & ByteOp) ? 1 : op_bytes, /* size */ rep_prefix ? address_mask(_regs[VCPU_REGS_RCX]) : 1, /* count */ - 1, /* strings */ (_eflags & EFLG_DF), /* down */ register_address(ctxt->es_base, _regs[VCPU_REGS_RDI]), /* address */ @@ -1139,12 +1138,11 @@ special_insn: return 0; case 0x6e: /* outsb */ case 0x6f: /* outsw/outsd */ - if (kvm_setup_pio(ctxt->vcpu, NULL, + if (kvm_emulate_pio_string(ctxt->vcpu, NULL, 0, /* in */ (d & ByteOp) ? 1 : op_bytes, /* size */ rep_prefix ? address_mask(_regs[VCPU_REGS_RCX]) : 1, /* count */ - 1, /* strings */ (_eflags & EFLG_DF), /* down */ register_address(override_base ? *override_base : ctxt->ds_base, -- 2.20.1