Messages in this thread | | | Date | Tue, 12 Jun 2012 09:49:28 +0200 | From | Christian Borntraeger <> | Subject | Re: [PATCH] kvm: notify host when guest panicked |
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>> We have three solutions to implement this feature: >> 1. use vmcall >> 2. use I/O port >> 3. use virtio-serial. > >> We have decided to avoid touching hypervisor. The reason why I choose >> choose the I/O port is: >> 1. it is easier to implememt >> 2. it does not depend any virtual device >> 3. it can work when startint the kernel
Havent looked deeply into that, butz wouldnt kvm_hypercall0 also fulfill all of these points? You just have to define the number for each architecture and then it should be possible to write a simple panic driver that works on all architectures.
>> --- a/include/linux/kvm_para.h >> +++ b/include/linux/kvm_para.h >> @@ -20,6 +20,14 @@ >> #define KVM_HC_FEATURES 3 >> #define KVM_HC_PPC_MAP_MAGIC_PAGE 4 >> >> +#define KVM_PV_PORT (0x505UL) >> +
ignoring the above, shouldnt a port number go into an architecture specific file?
Christian
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