| Message ID | 20220414132013.1588929-7-vkuznets@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | KVM: x86: hyper-v: Fine-grained TLB flush + L2 TLB flush feature | expand |
On Thu, 2022-04-14 at 15:19 +0200, Vitaly Kuznetsov wrote: > To handle L2 TLB flush requests, KVM needs to translate the specified > L2 GPA to L1 GPA to read hypercall arguments from there. > > No fucntional change as KVM doesn't handle VMCALL/VMMCALL from L2 yet. ^ typo > > Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> > --- > arch/x86/kvm/hyperv.c | 7 +++++++ > 1 file changed, 7 insertions(+) > > diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c > index 1a6f9628cee9..fc4bb0ead9fa 100644 > --- a/arch/x86/kvm/hyperv.c > +++ b/arch/x86/kvm/hyperv.c > @@ -23,6 +23,7 @@ > #include "ioapic.h" > #include "cpuid.h" > #include "hyperv.h" > +#include "mmu.h" > #include "xen.h" > > #include <linux/cpu.h> > @@ -1975,6 +1976,12 @@ static u64 kvm_hv_flush_tlb(struct kvm_vcpu *vcpu, struct kvm_hv_hcall *hc) > */ > BUILD_BUG_ON(KVM_HV_MAX_SPARSE_VCPU_SET_BITS > 64); > > + if (!hc->fast && is_guest_mode(vcpu)) { > + hc->ingpa = translate_nested_gpa(vcpu, hc->ingpa, 0, NULL); > + if (unlikely(hc->ingpa == UNMAPPED_GVA)) > + return HV_STATUS_INVALID_HYPERCALL_INPUT; > + } > + > if (hc->code == HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST || > hc->code == HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE) { > if (hc->fast) { Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com> Best regards, Maxim Levitsky
On Thu, 2022-04-14 at 15:19 +0200, Vitaly Kuznetsov wrote: > To handle L2 TLB flush requests, KVM needs to translate the specified > L2 GPA to L1 GPA to read hypercall arguments from there. > > No fucntional change as KVM doesn't handle VMCALL/VMMCALL from L2 yet. ^ typo > > Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> > --- > arch/x86/kvm/hyperv.c | 7 +++++++ > 1 file changed, 7 insertions(+) > > diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c > index 1a6f9628cee9..fc4bb0ead9fa 100644 > --- a/arch/x86/kvm/hyperv.c > +++ b/arch/x86/kvm/hyperv.c > @@ -23,6 +23,7 @@ > #include "ioapic.h" > #include "cpuid.h" > #include "hyperv.h" > +#include "mmu.h" > #include "xen.h" > > #include <linux/cpu.h> > @@ -1975,6 +1976,12 @@ static u64 kvm_hv_flush_tlb(struct kvm_vcpu *vcpu, struct kvm_hv_hcall *hc) > */ > BUILD_BUG_ON(KVM_HV_MAX_SPARSE_VCPU_SET_BITS > 64); > > + if (!hc->fast && is_guest_mode(vcpu)) { > + hc->ingpa = translate_nested_gpa(vcpu, hc->ingpa, 0, NULL); > + if (unlikely(hc->ingpa == UNMAPPED_GVA)) > + return HV_STATUS_INVALID_HYPERCALL_INPUT; > + } > + > if (hc->code == HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST || > hc->code == HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE) { > if (hc->fast) { Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com> Best regards, Maxim Levitsky
diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c index 1a6f9628cee9..fc4bb0ead9fa 100644 --- a/arch/x86/kvm/hyperv.c +++ b/arch/x86/kvm/hyperv.c @@ -23,6 +23,7 @@ #include "ioapic.h" #include "cpuid.h" #include "hyperv.h" +#include "mmu.h" #include "xen.h" #include <linux/cpu.h> @@ -1975,6 +1976,12 @@ static u64 kvm_hv_flush_tlb(struct kvm_vcpu *vcpu, struct kvm_hv_hcall *hc) */ BUILD_BUG_ON(KVM_HV_MAX_SPARSE_VCPU_SET_BITS > 64); + if (!hc->fast && is_guest_mode(vcpu)) { + hc->ingpa = translate_nested_gpa(vcpu, hc->ingpa, 0, NULL); + if (unlikely(hc->ingpa == UNMAPPED_GVA)) + return HV_STATUS_INVALID_HYPERCALL_INPUT; + } + if (hc->code == HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST || hc->code == HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE) { if (hc->fast) {
To handle L2 TLB flush requests, KVM needs to translate the specified L2 GPA to L1 GPA to read hypercall arguments from there. No fucntional change as KVM doesn't handle VMCALL/VMMCALL from L2 yet. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> --- arch/x86/kvm/hyperv.c | 7 +++++++ 1 file changed, 7 insertions(+)