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spapr: introduce the XIVE_EXPLOIT option in CAS

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On POWER9, the Client Architecture Support (CAS) negotiation process
determines whether the guest operates in XIVE Legacy compatibility
(the former POWER8 interrupt model) or in XIVE exploitation mode (the
newer POWER9 interrupt model).

Bit 7 of Byte 23 of vector 5 is used for this purpose.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Cédric Le Goater 2017-07-05 19:13:14 +02:00 • committed by David Gibson
parent 92e926e1e3
commit f2b14e3a9f
2 changed files with 8 additions and 6 deletions
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include/hw/ppc/spapr_ovec.h
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@ -50,6 +50,7 @@ typedef struct sPAPROptionVector sPAPROptionVector;
#define OV5_DRCONF_MEMORY OV_BIT(2, 2)
#define OV5_FORM1_AFFINITY OV_BIT(5, 0)
#define OV5_HP_EVT OV_BIT(6, 5)
#define OV5_XIVE_EXPLOIT OV_BIT(23, 7)
/* ISA 3.00 MMU features: */
#define OV5_MMU_BOTH OV_BIT(24, 0) /* Radix and hash */