Hi James, On 2018/6/29 23:58, James Morse wrote: > Hi Dongjiu Geng, > > This patch doesn't apply on v4.18-rc2. > > Documentation/virtual/kvm/api.txt already has a 8.18 section. I guess you > based > this on v4.17.
Yes, indeed I based on v4.17. > > For posting patches, please use the latest 'rc' from Linus' tree, (or the > maintainer's tree listed in MAINTAINERS for the tree you are targeting if the > maintainer has started to pick up patches). Ok, I will rebase it using the latest 'rc' from Linus' tree. thanks for the reminder. > > > Thanks, > > James > > > On 25/06/18 21:58, Dongjiu Geng wrote: >> For the arm64 RAS Extension, user space can inject a virtual-SError >> with specified ESR. So user space needs to know whether KVM support >> to inject such SError, this interface adds this query for this capability. >> >> KVM will check whether system support RAS Extension, if supported, KVM >> returns true to user space, otherwise returns false. > > >> diff --git a/Documentation/virtual/kvm/api.txt >> b/Documentation/virtual/kvm/api.txt >> index 3732097..86b3808 100644 >> --- a/Documentation/virtual/kvm/api.txt >> +++ b/Documentation/virtual/kvm/api.txt >> @@ -4628,3 +4628,14 @@ Architectures: s390 >> This capability indicates that kvm will implement the interfaces to handle >> reset, migration and nested KVM for branch prediction blocking. The stfle >> facility 82 should not be provided to the guest without this capability. >> + >> +8.14 KVM_CAP_ARM_SET_SERROR_ESR >> + >> +Architectures: arm, arm64 >> + >> +This capability indicates that userspace can specify the syndrome value >> reported >> +to the guest OS when guest takes a virtual SError interrupt exception. >> +If KVM has this capability, userspace can only specify the ISS field for >> the ESR >> +syndrome, it can not specify the EC field which is not under control by KVM. >> +If this virtual SError is taken to EL1 using AArch64, this value will be >> reported >> +in ISS filed of ESR_EL1. > > > > > . >
