Paul Mackerras 2ad7a27dea KVM: PPC: Book3S: Enable XIVE native capability only if OPAL has required functions ... There are some POWER9 machines where the OPAL firmware does not support the OPAL_XIVE_GET_QUEUE_STATE and OPAL_XIVE_SET_QUEUE_STATE calls. The impact of this is that a guest using XIVE natively will not be able to be migrated successfully. On the source side, the get_attr operation on the KVM native device for the KVM_DEV_XIVE_GRP_EQ_CONFIG attribute will fail; on the destination side, the set_attr operation for the same attribute will fail. This adds tests for the existence of the OPAL get/set queue state functions, and if they are not supported, the XIVE-native KVM device is not created and the KVM_CAP_PPC_IRQ_XIVE capability returns false. Userspace can then either provide a software emulation of XIVE, or else tell the guest that it does not have a XIVE controller available to it. Cc: stable@vger.kernel.org # v5.2+ Fixes: 3fab2d1058 ("KVM: PPC: Book3S HV: XIVE: Activate XIVE exploitation mode") Reviewed-by: David Gibson <david@gibson.dropbear.id.au> Reviewed-by: Cédric Le Goater <clg@kaod.org> Signed-off-by: Paul Mackerras <paulus@ozlabs.org>		2019-08-27 11:45:49 +10:00
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asm	KVM: PPC: Book3S: Enable XIVE native capability only if OPAL has required functions	2019-08-27 11:45:49 +10:00
uapi/asm	SPDX fixes for 5.3-rc2	2019-07-28 10:00:06 -07:00