| From | Reiji Watanabe <> | Date | Sun, 12 Sep 2021 00:05:22 -0700 | Subject | Re: [PATCH v4 09/18] KVM: arm64: selftests: Add guest support to get the vcpuid |
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Hi Raghu and all,
On Wed, Sep 8, 2021 at 6:38 PM Raghavendra Rao Ananta <rananta@google.com> wrote: > > At times, such as when in the interrupt handler, the guest wants > to get the vcpuid that it's running on. As a result, introduce > get_vcpuid() that returns the vcpuid of the calling vcpu. At its > backend, the VMM prepares a map of vcpuid and mpidr during VM > initialization and exports the map to the guest for it to read.
How about using TPIDR_EL1 to hold the vcpuid ? i.e. have aarch64_vcpu_setup() set the register to vcpuid and guest_get_vcpuid() simply return a value of the register. This would be a simpler solution to implement.
Thanks, Reiji
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