On 20/9/23 21:50, Oliver Upton wrote:
To date KVM has relied on kvm_reset_vcpu() failing when the vCPU feature flags are unsupported by the system. This is a bit messy since kvm_reset_vcpu() is called at runtime outside of the KVM_ARM_VCPU_INIT ioctl when it is expected to succeed. Further complicating the matter is that kvm_reset_vcpu() must tolerate be idemptotent to the config_lock, as it isn't consistently called with the lock held. Prepare to move feature compatibility checks out of kvm_reset_vcpu() with a 'generic' check that compares the user-provided flags with a computed maximum feature set for the system. Signed-off-by: Oliver Upton <oliver.upton@xxxxxxxxx> --- arch/arm64/kvm/arm.c | 16 +++++++++++++--- 1 file changed, 13 insertions(+), 3 deletions(-)
Reviewed-by: Philippe Mathieu-Daudé <philmd@xxxxxxxxxx>
