Gitweb: http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=65619eb5a88dae3dadbb1050f957ed357aa54a50 Commit: 65619eb5a88dae3dadbb1050f957ed357aa54a50 Parent: 24cbc7e9cb0488095e4e144a762276c85ff55f9b Author: Eddie Dong <[EMAIL PROTECTED]> AuthorDate: Tue Jul 17 11:52:33 2007 +0300 Committer: Avi Kivity <[EMAIL PROTECTED]> CommitDate: Sat Oct 13 10:18:17 2007 +0200
KVM: In-kernel string pio write support Add string pio write support to support some version of Windows. Signed-off-by: Yaozu (Eddie) Dong <[EMAIL PROTECTED]> Signed-off-by: Avi Kivity <[EMAIL PROTECTED]> --- drivers/kvm/kvm_main.c | 48 +++++++++++++++++++++++++++++++++++++----------- 1 files changed, 37 insertions(+), 11 deletions(-) diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c index df9c05e..1be510b 100644 --- a/drivers/kvm/kvm_main.c +++ b/drivers/kvm/kvm_main.c @@ -1760,18 +1760,35 @@ static int complete_pio(struct kvm_vcpu *vcpu) return 0; } -void kernel_pio(struct kvm_io_device *pio_dev, struct kvm_vcpu *vcpu) +static void kernel_pio(struct kvm_io_device *pio_dev, + struct kvm_vcpu *vcpu, + void *pd) { /* TODO: String I/O for in kernel device */ if (vcpu->pio.in) kvm_iodevice_read(pio_dev, vcpu->pio.port, vcpu->pio.size, - vcpu->pio_data); + pd); else kvm_iodevice_write(pio_dev, vcpu->pio.port, vcpu->pio.size, - vcpu->pio_data); + pd); +} + +static void pio_string_write(struct kvm_io_device *pio_dev, + struct kvm_vcpu *vcpu) +{ + struct kvm_pio_request *io = &vcpu->pio; + void *pd = vcpu->pio_data; + int i; + + for (i = 0; i < io->cur_count; i++) { + kvm_iodevice_write(pio_dev, io->port, + io->size, + pd); + pd += io->size; + } } int kvm_setup_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in, @@ -1779,7 +1796,7 @@ int kvm_setup_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in, gva_t address, int rep, unsigned port) { unsigned now, in_page; - int i; + int i, ret = 0; int nr_pages = 1; struct page *page; struct kvm_io_device *pio_dev; @@ -1806,15 +1823,12 @@ int kvm_setup_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in, memcpy(vcpu->pio_data, &vcpu->regs[VCPU_REGS_RAX], 4); kvm_arch_ops->decache_regs(vcpu); if (pio_dev) { - kernel_pio(pio_dev, vcpu); + kernel_pio(pio_dev, vcpu, vcpu->pio_data); complete_pio(vcpu); return 1; } return 0; } - /* TODO: String I/O for in kernel device */ - if (pio_dev) - printk(KERN_ERR "kvm_setup_pio: no string io support\n"); if (!count) { kvm_arch_ops->skip_emulated_instruction(vcpu); @@ -1862,9 +1876,21 @@ int kvm_setup_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in, } } - if (!vcpu->pio.in) - return pio_copy_data(vcpu); - return 0; + if (!vcpu->pio.in) { + /* string PIO write */ + ret = pio_copy_data(vcpu); + if (ret >= 0 && pio_dev) { + pio_string_write(pio_dev, vcpu); + complete_pio(vcpu); + if (vcpu->pio.count == 0) + ret = 1; + } + } else if (pio_dev) + printk(KERN_ERR "no string pio read support yet, " + "port %x size %d count %ld\n", + port, size, count); + + return ret; } EXPORT_SYMBOL_GPL(kvm_setup_pio); - To unsubscribe from this list: send the line "unsubscribe git-commits-head" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html