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authorThomas Huth <thuth@redhat.com>2017-04-05 15:58:51 +0200
committerPaul Mackerras <paulus@ozlabs.org>2017-04-20 03:39:32 +0200
commitfeafd13c96d6e2998d3da81bb55db379fcf02499 (patch)
tree6049c97e88caf30912603728ca446d457bfd739f /drivers
parentKVM: PPC: VFIO: Add in-kernel acceleration for VFIO (diff)
downloadlinux-feafd13c96d6e2998d3da81bb55db379fcf02499.tar.xz
linux-feafd13c96d6e2998d3da81bb55db379fcf02499.zip
KVM: PPC: Book3S PR: Do not fail emulation with mtspr/mfspr for unknown SPRs
According to the PowerISA 2.07, mtspr and mfspr should not always generate an illegal instruction exception when being used with an undefined SPR, but rather treat the instruction as a NOP or inject a privilege exception in some cases, too - depending on the SPR number. Also turn the printk here into a ratelimited print statement, so that the guest can not flood the dmesg log of the host by issueing lots of illegal mtspr/mfspr instruction here. Signed-off-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
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