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ppc/xive2: Support crowd-matching when looking for target

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XIVE crowd sizes are encoded into a 2-bit field as follows:
  0: 0b00
  2: 0b01
  4: 0b10
 16: 0b11

A crowd size of 8 is not supported.

If an END is defined with the 'crowd' bit set, then a target can be
running on different blocks. It means that some bits from the block
VP are masked when looking for a match. It is similar to groups, but
on the block instead of the VP index.

Most of the changes are due to passing the extra argument 'crowd' all
the way to the function checking for matches.

Signed-off-by: Frederic Barrat <fbarrat@linux.ibm.com>
Signed-off-by: Glenn Miles <milesg@linux.vnet.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 11:53:52 +10:00 • committed by Nicholas Piggin
parent 96a2132ce9
commit 1a3cc1209b
9 changed files with 134 additions and 52 deletions
Download patch file Download diff file Expand all files Collapse all files

10
include/hw/ppc/xive.h
View file

@ -438,13 +438,13 @@ struct XivePresenterClass {
InterfaceClass parent;
int (*match_nvt)(XivePresenter *xptr, uint8_t format,
uint8_t nvt_blk, uint32_t nvt_idx,
bool cam_ignore, uint8_t priority,
bool crowd, bool cam_ignore, uint8_t priority,
uint32_t logic_serv, XiveTCTXMatch *match);
bool (*in_kernel)(const XivePresenter *xptr);
uint32_t (*get_config)(XivePresenter *xptr);
int (*broadcast)(XivePresenter *xptr,
uint8_t nvt_blk, uint32_t nvt_idx,
uint8_t priority);
bool crowd, bool cam_ignore, uint8_t priority);
};
int xive_presenter_tctx_match(XivePresenter *xptr, XiveTCTX *tctx,
@ -453,7 +453,7 @@ int xive_presenter_tctx_match(XivePresenter *xptr, XiveTCTX *tctx,
bool cam_ignore, uint32_t logic_serv);
bool xive_presenter_notify(XiveFabric *xfb, uint8_t format,
uint8_t nvt_blk, uint32_t nvt_idx,
bool cam_ignore, uint8_t priority,
bool crowd, bool cam_ignore, uint8_t priority,
uint32_t logic_serv, bool *precluded);
uint32_t xive_get_vpgroup_size(uint32_t nvp_index);
@ -473,10 +473,10 @@ struct XiveFabricClass {
InterfaceClass parent;
int (*match_nvt)(XiveFabric *xfb, uint8_t format,
uint8_t nvt_blk, uint32_t nvt_idx,
bool cam_ignore, uint8_t priority,
bool crowd, bool cam_ignore, uint8_t priority,
uint32_t logic_serv, XiveTCTXMatch *match);
int (*broadcast)(XiveFabric *xfb, uint8_t nvt_blk, uint32_t nvt_idx,
uint8_t priority);
bool crowd, bool cam_ignore, uint8_t priority);
};
/*

3
include/hw/ppc/xive2.h
View file

@ -88,7 +88,8 @@ void xive2_router_notify(XiveNotifier *xn, uint32_t lisn, bool pq_checked);
int xive2_presenter_tctx_match(XivePresenter *xptr, XiveTCTX *tctx,
uint8_t format,
uint8_t nvt_blk, uint32_t nvt_idx,
bool cam_ignore, uint32_t logic_serv);
bool crowd, bool cam_ignore,
uint32_t logic_serv);
uint64_t xive2_presenter_nvp_backlog_op(XivePresenter *xptr,
uint8_t blk, uint32_t idx,