PATCH 2/2] setup_pio-cleanup, some cleanup, split kvm_setup_pio() in 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 <[EMAIL PROTECTED]>
--
------------- [EMAIL PROTECTED] --------------
"Software is hard" - Donald Knuth
Index: kvm/drivers/kvm/kvm.h
===================================================================
--- kvm.orig/drivers/kvm/kvm.h 2007-08-03 10:03:26.000000000 +0200
+++ kvm/drivers/kvm/kvm.h 2007-08-03 10:04:25.000000000 +0200
@@ -539,9 +539,11 @@
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);
Index: kvm/drivers/kvm/kvm_main.c
===================================================================
--- kvm.orig/drivers/kvm/kvm_main.c 2007-08-03 09:52:37.000000000 +0200
+++ kvm/drivers/kvm/kvm_main.c 2007-08-03 11:11:17.000000000 +0200
@@ -1734,8 +1734,39 @@
}
}
-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;
@@ -1746,33 +1777,16 @@
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;
@@ -1817,6 +1831,7 @@
}
}
+ pio_dev = vcpu_find_pio_dev(vcpu, port);
if (!vcpu->pio.in) {
/* string PIO write */
ret = pio_copy_data(vcpu);
@@ -1833,7 +1848,7 @@
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)
{
Index: kvm/drivers/kvm/svm.c
===================================================================
--- kvm.orig/drivers/kvm/svm.c 2007-08-03 10:02:58.000000000 +0200
+++ kvm/drivers/kvm/svm.c 2007-08-03 10:05:40.000000000 +0200
@@ -1005,8 +1005,7 @@
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)
Index: kvm/drivers/kvm/vmx.c
===================================================================
--- kvm.orig/drivers/kvm/vmx.c 2007-08-03 10:00:11.000000000 +0200
+++ kvm/drivers/kvm/vmx.c 2007-08-03 10:02:55.000000000 +0200
@@ -1783,8 +1783,7 @@
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
Index: kvm/drivers/kvm/x86_emulate.c
===================================================================
--- kvm.orig/drivers/kvm/x86_emulate.c 2007-08-03 10:04:34.000000000 +0200
+++ kvm/drivers/kvm/x86_emulate.c 2007-08-03 10:05:16.000000000 +0200
@@ -1123,12 +1123,11 @@
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 @@
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,
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