On 01/17/2010 02:36 PM, Gleb Natapov wrote:
+
+int kvm_hv_vapic_msr_read(struct kvm_vcpu *vcpu, u32 reg, u64 *data)
+{
+ struct kvm_lapic *apic = vcpu->arch.apic;
+ u32 low, high = 0;
+
+ if (!irqchip_in_kernel(vcpu->kvm))
+ return 1;
+
+ if (apic_reg_read(apic, reg, 4,&low))
+ return 1;
+ if (reg == APIC_ICR)
+ apic_reg_read(apic, APIC_ICR2, 4,&high);
+
+ *data = (((u64)high)<< 32) | low;
+
+ return 0;
+}
I prefer putting this in x86.c (maybe later split into hyperv.c).
This implements part of apic behaviour. It uses internal lapic functions
like apic_reg_read()/apic_reg_write(). Why move it from lapic.c?
The new functions implement hyper-v behaviour. Why scatter them all around?
Maybe apic_reg_{read,write} need to be exported.
static int set_msr_hyperv(struct kvm_vcpu *vcpu, u32 msr, u64 data)
{
- pr_unimpl(vcpu, "HYPER-V unimplemented wrmsr: 0x%x data 0x%llx\n",
- msr, data);
+ switch (msr) {
+ case HV_X64_MSR_APIC_ASSIST_PAGE: {
+ unsigned long vaddr;
+ void *addr;
+ struct page *page;
+ vcpu->arch.hv_vapic = data;
+ if (!kvm_hv_vapic_enabled(vcpu))
+ break;
+ vaddr = gfn_to_hva(vcpu->kvm, data>>
+ HV_X64_MSR_APIC_ASSIST_PAGE_ADDRESS_SHIFT);
+ if (kvm_is_error_hva(vaddr))
+ return 1;
+ page = virt_to_page(vaddr);
virt_to_page() takes a kernel address, not a user address. This is
get_user_pages(). But I think the whole thing is done better with
put_user().
So there is no function to get struct page from user virtual address?
get_user_pages_fast().
--
error compiling committee.c: too many arguments to function
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