The dust has not yet settled on the new vgic, but here's the first batch of fixes anyway! The first two patches are courtesy of Christoffer, who noticed that we fail to clear LRs that generate a maintenance interrupt, leading to potential screaming interrupts. This bug already exists in the current mainline. The next two address a bug where we fail to properly resample the line level on exit, which could result in spurious interrupts being injected. This is specific to the new vgic. The following two patches tighten our GICv3 emulation by preventing the guest from changing the SRE setting. This bug already exists in mainline. The last patch is actually a performance optimization: if the guest is using GICv3, we can drop a number of barriers (since we don't need to change SRE, and there is no memory-mapped view to synchronize with). This results in a world switch that is 2.5% faster on my LS2085 box when running GICv3 guests. These patches have been tested on top of the kvmarm/next branch. Thanks, M. Christoffer Dall (2): KVM: arm/arm64: vgic-v2: Clear all dirty LRs KVM: arm/arm64: vgic-v3: Clear all dirty LRs Marc Zyngier (5): KVM: arm/arm64: vgic-v2: Always resample level interrupts KVM: arm/arm64: vgic-v3: Always resample level interrupts arm64: KVM: Make ICC_SRE_EL1 access return the configured SRE value arm64: KVM: vgic-v3: Prevent the guest from messing with ICC_SRE_EL1 arm64: KVM: vgic-v3: Relax synchronization when SRE==1 arch/arm64/kvm/hyp/vgic-v3-sr.c | 36 +++++++++++++++++++++--------------- arch/arm64/kvm/sys_regs.c | 13 ++++++++++++- virt/kvm/arm/hyp/vgic-v2-sr.c | 7 +++---- virt/kvm/arm/vgic/vgic-v2.c | 11 +++++++---- virt/kvm/arm/vgic/vgic-v3.c | 11 +++++++---- 5 files changed, 50 insertions(+), 28 deletions(-) -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
