diff options
| author | Sam Bobroff <sam.bobroff@au1.ibm.com> | 2017-03-20 10:46:49 +1100 |
|---|---|---|
| committer | David Gibson <david@gibson.dropbear.id.au> | 2017-04-26 12:00:41 +1000 |
| commit | e957f6a9b92439a222ecd4ff1c8cdc9700710c72 (patch) | |
| tree | 636fa2579717d1b21292ce4010a65a9f22cea749 /include/hw/ppc/spapr_ovec.h | |
| parent | 9fb4541f5803f8d2ba116b12113386e26482ba30 (diff) | |
spapr: Workaround for broken radix guests
For a little while around 4.9, Linux kernels that saw the radix bit in
ibm,pa-features would attempt to set up the MMU as if they were a
hypervisor, even if they were a guest, which would cause them to
crash.
Work around this by detecting pre-ISA 3.0 guests by their lack of that
bit in option vector 1, and then removing the radix bit from
ibm,pa-features. Note: This now requires regeneration of that node
after CAS negotiation.
Signed-off-by: Sam Bobroff <sam.bobroff@au1.ibm.com>
[dwg: Fix style nits]
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Diffstat (limited to 'include/hw/ppc/spapr_ovec.h')
| -rw-r--r-- | include/hw/ppc/spapr_ovec.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/hw/ppc/spapr_ovec.h b/include/hw/ppc/spapr_ovec.h index f7f2abeb16..f088833204 100644 --- a/include/hw/ppc/spapr_ovec.h +++ b/include/hw/ppc/spapr_ovec.h @@ -43,6 +43,9 @@ typedef struct sPAPROptionVector sPAPROptionVector; #define OV_BIT(byte, bit) ((byte - 1) * BITS_PER_BYTE + bit) +/* option vector 1 */ +#define OV1_PPC_3_00 OV_BIT(3, 0) /* guest supports PowerPC 3.00? */ + /* option vector 5 */ #define OV5_DRCONF_MEMORY OV_BIT(2, 2) #define OV5_FORM1_AFFINITY OV_BIT(5, 0) |