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KVM: arm64: ITS: return 1 on successful MSI injection

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According to the KVM API documentation a successful MSI injection
should return a value > 0 on success.
Return possible errors in vgic_its_trigger_msi() and report a
successful injection back to userland, while also reporting the
case where the MSI could not be delivered due to the guest not
having the LPI mapped, for instance.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
This commit is contained in:
Andre Przywara
2016-08-08 17:29:28 +01:00
committed by Christoffer Dall
parent 29b4817d40
commit fd837b08d9
2 changed files with 37 additions and 18 deletions
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1
include/linux/irqchip/arm-gic-v3.h
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@@ -337,6 +337,7 @@
*/
#define E_ITS_MOVI_UNMAPPED_INTERRUPT 0x010107
#define E_ITS_MOVI_UNMAPPED_COLLECTION 0x010109
#define E_ITS_INT_UNMAPPED_INTERRUPT 0x010307
#define E_ITS_CLEAR_UNMAPPED_INTERRUPT 0x010507
#define E_ITS_MAPD_DEVICE_OOR 0x010801
#define E_ITS_MAPC_PROCNUM_OOR 0x010902