Reviewed-by: Glenn Miles <mil...@linux.ibm.com>
On Mon, 2025-05-12 at 13:10 +1000, Nicholas Piggin wrote:
> Have xive_tctx_accept clear NSR in one shot rather than masking out bits
> as they are tested, which makes it clear it's reset to 0, and does not
> have a partial NSR value in the register.
>
> Signed-off-by: Nicholas Piggin <npig...@gmail.com>
> ---
> hw/intc/xive.c | 6 ++----
> 1 file changed, 2 insertions(+), 4 deletions(-)
>
> diff --git a/hw/intc/xive.c b/hw/intc/xive.c
> index 6293ea4361..bb40a69c5b 100644
> --- a/hw/intc/xive.c
> +++ b/hw/intc/xive.c
> @@ -68,13 +68,11 @@ static uint64_t xive_tctx_accept(XiveTCTX *tctx, uint8_t
> ring)
> * If the interrupt was for a specific VP, reset the pending
> * buffer bit, otherwise clear the logical server indicator
> */
> - if (regs[TM_NSR] & TM_NSR_GRP_LVL) {
> - regs[TM_NSR] &= ~TM_NSR_GRP_LVL;
> - } else {
> + if (!(regs[TM_NSR] & TM_NSR_GRP_LVL)) {
> alt_regs[TM_IPB] &= ~xive_priority_to_ipb(cppr);
> }
>
> - /* Drop the exception bit and any group/crowd */
> + /* Clear the exception from NSR */
> regs[TM_NSR] = 0;
>
> trace_xive_tctx_accept(tctx->cs->cpu_index, alt_ring,
