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ppc/xive2: Process group backlog when updating the CPPR

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When the hypervisor or OS pushes a new value to the CPPR, if the LSMFB
value is lower than the new CPPR value, there could be a pending group
interrupt in the backlog, so it needs to be scanned.

Signed-off-by: Frederic Barrat <fbarrat@linux.ibm.com>
Signed-off-by: Michael Kowal <kowal@linux.ibm.com>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
This commit is contained in:
Frederic Barrat 2025-03-11 11:51:22 +10:00 • committed by Nicholas Piggin
parent 071456d0c7
commit 26c55b9941
3 changed files with 177 additions and 4 deletions
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4
include/hw/ppc/xive2.h
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@ -113,6 +113,10 @@ typedef struct Xive2EndSource {
* XIVE2 Thread Interrupt Management Area (POWER10)
*/
void xive2_tm_set_hv_cppr(XivePresenter *xptr, XiveTCTX *tctx,
hwaddr offset, uint64_t value, unsigned size);
void xive2_tm_set_os_cppr(XivePresenter *xptr, XiveTCTX *tctx,
hwaddr offset, uint64_t value, unsigned size);
void xive2_tm_push_os_ctx(XivePresenter *xptr, XiveTCTX *tctx, hwaddr offset,
uint64_t value, unsigned size);
uint64_t xive2_tm_pull_os_ctx(XivePresenter *xptr, XiveTCTX *tctx,