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| author | Suraj Jitindar Singh <sjitindarsingh@gmail.com> | 2017-02-28 17:03:48 +1100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-03-06 21:44:09 +1100 |
| commit | 014d02cbf16b3106dc8e93281d2a9c189751ed5e (patch) | |
| tree | 31f2cd87c238719b3d53492ac307db57ec2e935e /arch/powerpc/include/asm/prom.h | |
| parent | 12cc9fd6b2d8ee307a735b3b9faed0d17b719463 (diff) | |
| download | linux-014d02cbf16b3106dc8e93281d2a9c189751ed5e.tar.gz linux-014d02cbf16b3106dc8e93281d2a9c189751ed5e.tar.bz2 linux-014d02cbf16b3106dc8e93281d2a9c189751ed5e.zip | |
powerpc: Update to new option-vector-5 format for CAS
On POWER9 the ibm,client-architecture-support (CAS) negotiation process
has been updated to change how the host to guest negotiation is done for
the new hash/radix mmu as well as the nest mmu, process tables and guest
translation shootdown (GTSE).
This is documented in the unreleased PAPR ACR "CAS option vector
additions for P9".
The host tells the guest which options it supports in
ibm,arch-vec-5-platform-support. The guest then chooses a subset of these
to request in the CAS call and these are agreed to in the
ibm,architecture-vec-5 property of the chosen node.
Thus we read ibm,arch-vec-5-platform-support and make our selection before
calling CAS. We then parse the ibm,architecture-vec-5 property of the
chosen node to check whether we should run as hash or radix.
ibm,arch-vec-5-platform-support format:
index value pairs: <index, val> ... <index, val>
index: Option vector 5 byte number
val: Some representation of supported values
Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Acked-by: Paul Mackerras <paulus@ozlabs.org>
[mpe: Don't print about unknown options, be consistent with OV5_FEAT]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include/asm/prom.h')
| -rw-r--r-- | arch/powerpc/include/asm/prom.h | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/arch/powerpc/include/asm/prom.h b/arch/powerpc/include/asm/prom.h index 4a90634e8322..35c00d7a0cf8 100644 --- a/arch/powerpc/include/asm/prom.h +++ b/arch/powerpc/include/asm/prom.h @@ -160,12 +160,18 @@ struct of_drconf_cell { #define OV5_PFO_HW_ENCR 0x1120 /* PFO Encryption Accelerator */ #define OV5_SUB_PROCESSORS 0x1501 /* 1,2,or 4 Sub-Processors supported */ #define OV5_XIVE_EXPLOIT 0x1701 /* XIVE exploitation supported */ -#define OV5_MMU_RADIX_300 0x1880 /* ISA v3.00 radix MMU supported */ -#define OV5_MMU_HASH_300 0x1840 /* ISA v3.00 hash MMU supported */ -#define OV5_MMU_SEGM_RADIX 0x1820 /* radix mode (no segmentation) */ -#define OV5_MMU_PROC_TBL 0x1810 /* hcall selects SLB or proc table */ -#define OV5_MMU_SLB 0x1800 /* always use SLB */ -#define OV5_MMU_GTSE 0x1808 /* Guest translation shootdown */ +/* MMU Base Architecture */ +#define OV5_MMU_SUPPORT 0x18C0 /* MMU Mode Support Mask */ +#define OV5_MMU_HASH 0x1800 /* Hash MMU Only */ +#define OV5_MMU_RADIX 0x1840 /* Radix MMU Only */ +#define OV5_MMU_EITHER 0x1880 /* Hash or Radix Supported */ +#define OV5_MMU_DYNAMIC 0x18C0 /* Hash or Radix Can Switch Later */ +#define OV5_NMMU 0x1820 /* Nest MMU Available */ +/* Hash Table Extensions */ +#define OV5_HASH_SEG_TBL 0x1980 /* In Memory Segment Tables Available */ +#define OV5_HASH_GTSE 0x1940 /* Guest Translation Shoot Down Avail */ +/* Radix Table Extensions */ +#define OV5_RADIX_GTSE 0x1A40 /* Guest Translation Shoot Down Avail */ /* Option Vector 6: IBM PAPR hints */ #define OV6_LINUX 0x02 /* Linux is our OS */ |