diff options
Diffstat (limited to 'common/recipes-kernel/linux/linux-yocto-4.9.21/0085-KVM-lapic-stop-advertising-DIRECTED_EOI-when-in-kern.patch')
| -rw-r--r-- | common/recipes-kernel/linux/linux-yocto-4.9.21/0085-KVM-lapic-stop-advertising-DIRECTED_EOI-when-in-kern.patch | 56 |
1 files changed, 0 insertions, 56 deletions
diff --git a/common/recipes-kernel/linux/linux-yocto-4.9.21/0085-KVM-lapic-stop-advertising-DIRECTED_EOI-when-in-kern.patch b/common/recipes-kernel/linux/linux-yocto-4.9.21/0085-KVM-lapic-stop-advertising-DIRECTED_EOI-when-in-kern.patch deleted file mode 100644 index db300b21..00000000 --- a/common/recipes-kernel/linux/linux-yocto-4.9.21/0085-KVM-lapic-stop-advertising-DIRECTED_EOI-when-in-kern.patch +++ /dev/null @@ -1,56 +0,0 @@ -From 2ece92e70fbd29fd14c1add63648b7154521b473 Mon Sep 17 00:00:00 2001 -From: Vitaly Kuznetsov <vkuznets@redhat.com> -Date: Fri, 9 Feb 2018 14:01:33 +0100 -Subject: [PATCH 85/93] KVM: lapic: stop advertising DIRECTED_EOI when - in-kernel IOAPIC is in use -MIME-Version: 1.0 -Content-Type: text/plain; charset=UTF-8 -Content-Transfer-Encoding: 8bit - -[ Upstream commit 0bcc3fb95b97ac2ca223a5a870287b37f56265ac ] - -Devices which use level-triggered interrupts under Windows 2016 with -Hyper-V role enabled don't work: Windows disables EOI broadcast in SPIV -unconditionally. Our in-kernel IOAPIC implementation emulates an old IOAPIC -version which has no EOI register so EOI never happens. - -The issue was discovered and discussed a while ago: -https://www.spinics.net/lists/kvm/msg148098.html - -While this is a guest OS bug (it should check that IOAPIC has the required -capabilities before disabling EOI broadcast) we can workaround it in KVM: -advertising DIRECTED_EOI with in-kernel IOAPIC makes little sense anyway. - -Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> -Signed-off-by: Radim Krčmář <rkrcmar@redhat.com> -Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> -Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> ---- - arch/x86/kvm/lapic.c | 10 +++++++++- - 1 file changed, 9 insertions(+), 1 deletion(-) - -diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c -index 650ff4a..d99e13d 100644 ---- a/arch/x86/kvm/lapic.c -+++ b/arch/x86/kvm/lapic.c -@@ -294,8 +294,16 @@ void kvm_apic_set_version(struct kvm_vcpu *vcpu) - if (!lapic_in_kernel(vcpu)) - return; - -+ /* -+ * KVM emulates 82093AA datasheet (with in-kernel IOAPIC implementation) -+ * which doesn't have EOI register; Some buggy OSes (e.g. Windows with -+ * Hyper-V role) disable EOI broadcast in lapic not checking for IOAPIC -+ * version first and level-triggered interrupts never get EOIed in -+ * IOAPIC. -+ */ - feat = kvm_find_cpuid_entry(apic->vcpu, 0x1, 0); -- if (feat && (feat->ecx & (1 << (X86_FEATURE_X2APIC & 31)))) -+ if (feat && (feat->ecx & (1 << (X86_FEATURE_X2APIC & 31))) && -+ !ioapic_in_kernel(vcpu->kvm)) - v |= APIC_LVR_DIRECTED_EOI; - kvm_lapic_set_reg(apic, APIC_LVR, v); - } --- -2.7.4 - |