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ppc/xive: Check TIMA operations validity

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Certain TIMA operations should only be performed when a ring is valid,
others when the ring is invalid, and they are considered undefined if
used incorrectly. Add checks for this condition.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Glenn Miles <milesg@linux.ibm.com>
Reviewed-by: Michael Kowal <kowal@linux.ibm.com>
Tested-by: Gautam Menghani <gautam@linux.ibm.com>
Link: https://lore.kernel.org/qemu-devel/20250512031100.439842-44-npiggin@gmail.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>
This commit is contained in:
Nicholas Piggin
2025-07-21 08:03:53 +02:00
committed by Cédric Le Goater
parent 565e6d4d21
commit ca0081ef7e
2 changed files with 116 additions and 81 deletions
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include/hw/ppc/xive.h
+1
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@@ -365,6 +365,7 @@ static inline uint32_t xive_tctx_word2(uint8_t *ring)
return *((uint32_t *) &ring[TM_WORD2]);
}
bool xive_ring_valid(XiveTCTX *tctx, uint8_t ring);
bool xive_nsr_indicates_exception(uint8_t ring, uint8_t nsr);
bool xive_nsr_indicates_group_exception(uint8_t ring, uint8_t nsr);
uint8_t xive_nsr_exception_ring(uint8_t ring, uint8_t nsr);