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| author | Cédric Le Goater | 2018-12-17 23:34:42 +0100 |
|---|---|---|
| committer | David Gibson | 2018-12-20 23:40:43 +0100 |
| commit | db592b5b16b4f2821b8bb3f4f46825d660d2d4c2 (patch) | |
| tree | be0f654e7640501dbf74090bb95736f184ab2c37 /include/hw/ppc/spapr.h | |
| parent | spapr: add a 'reset' method to the sPAPR IRQ backend (diff) | |
| download | qemu-db592b5b16b4f2821b8bb3f4f46825d660d2d4c2.tar.gz qemu-db592b5b16b4f2821b8bb3f4f46825d660d2d4c2.tar.xz qemu-db592b5b16b4f2821b8bb3f4f46825d660d2d4c2.zip | |
spapr: add an extra OV5 field to the sPAPR IRQ backend
The interrupt modes supported by the hypervisor are advertised to the
guest with new bits definitions of the option vector 5 of property
"ibm,arch-vec-5-platform-support. The byte 23 bits 0-1 of the OV5 are
defined as follow :
0b00 PAPR 2.7 and earlier (Legacy systems)
0b01 XIVE Exploitation mode only
0b10 Either available
If the client/guest selects the XIVE interrupt mode, it informs the
hypervisor by returning the value 0b01 in byte 23 bits 0-1. A 0b00
value indicates the use of the XICS interrupt mode (Legacy systems).
The sPAPR IRQ backend is extended with these definitions and the
values are directly used to populate the "ibm,arch-vec-5-platform-support"
property. The interrupt mode is advertised under TCG and under KVM.
Although a KVM XIVE device is not yet available, the machine can still
operate with kernel_irqchip=off. However, we apply a restriction on
the CPU which is required to be a POWER9 when a XIVE interrupt
controller is in use.
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Diffstat (limited to 'include/hw/ppc/spapr.h')
| -rw-r--r-- | include/hw/ppc/spapr.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h index 6bf028a02f..06765b4e9d 100644 --- a/include/hw/ppc/spapr.h +++ b/include/hw/ppc/spapr.h @@ -824,5 +824,11 @@ int spapr_caps_post_migration(sPAPRMachineState *spapr); void spapr_check_pagesize(sPAPRMachineState *spapr, hwaddr pagesize, Error **errp); +/* + * XIVE definitions + */ +#define SPAPR_OV5_XIVE_LEGACY 0x0 +#define SPAPR_OV5_XIVE_EXPLOIT 0x40 +#define SPAPR_OV5_XIVE_BOTH 0x80 /* Only to advertise on the platform */ #endif /* HW_SPAPR_H */ |