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ppc/xive2: add interrupt priority configuration flags

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Adds support for extracting additional configuration flags from
the XIVE configuration register that are needed for redistribution
of group interrupts.

Signed-off-by: Glenn Miles <milesg@linux.ibm.com>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Michael Kowal <kowal@linux.ibm.com>
Tested-by: Gautam Menghani <gautam@linux.ibm.com>
Link: https://lore.kernel.org/qemu-devel/20250512031100.439842-22-npiggin@gmail.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>
This commit is contained in:
Glenn Miles 2025-05-12 13:10:30 +10:00 • committed by Cédric Le Goater
parent 9898cc8030
commit b22ffb4299
3 changed files with 18 additions and 7 deletions
Download patch file Download diff file Expand all files Collapse all files

16
hw/intc/pnv_xive2.c
View file

@ -605,20 +605,28 @@ static uint32_t pnv_xive2_get_config(Xive2Router *xrtr)
{
PnvXive2 *xive = PNV_XIVE2(xrtr);
uint32_t cfg = 0;
uint64_t reg = xive->cq_regs[CQ_XIVE_CFG >> 3];
if (xive->cq_regs[CQ_XIVE_CFG >> 3] & CQ_XIVE_CFG_GEN1_TIMA_OS) {
if (reg & CQ_XIVE_CFG_GEN1_TIMA_OS) {
cfg |= XIVE2_GEN1_TIMA_OS;
}
if (xive->cq_regs[CQ_XIVE_CFG >> 3] & CQ_XIVE_CFG_EN_VP_SAVE_RESTORE) {
if (reg & CQ_XIVE_CFG_EN_VP_SAVE_RESTORE) {
cfg |= XIVE2_VP_SAVE_RESTORE;
}
if (GETFIELD(CQ_XIVE_CFG_HYP_HARD_RANGE,
xive->cq_regs[CQ_XIVE_CFG >> 3]) == CQ_XIVE_CFG_THREADID_8BITS) {
if (GETFIELD(CQ_XIVE_CFG_HYP_HARD_RANGE, reg) ==
CQ_XIVE_CFG_THREADID_8BITS) {
cfg |= XIVE2_THREADID_8BITS;
}
if (reg & CQ_XIVE_CFG_EN_VP_GRP_PRIORITY) {
cfg |= XIVE2_EN_VP_GRP_PRIORITY;
}
cfg = SETFIELD(XIVE2_VP_INT_PRIO, cfg,
GETFIELD(CQ_XIVE_CFG_VP_INT_PRIO, reg));
return cfg;
}

1
hw/intc/pnv_xive2_regs.h
View file

@ -66,6 +66,7 @@
#define CQ_XIVE_CFG_GEN1_TIMA_HYP_BLK0 PPC_BIT(26) /* 0 if bit[25]=0 */
#define CQ_XIVE_CFG_GEN1_TIMA_CROWD_DIS PPC_BIT(27) /* 0 if bit[25]=0 */
#define CQ_XIVE_CFG_GEN1_END_ESX PPC_BIT(28)
#define CQ_XIVE_CFG_EN_VP_GRP_PRIORITY PPC_BIT(32) /* 0 if bit[25]=1 */
#define CQ_XIVE_CFG_EN_VP_SAVE_RESTORE PPC_BIT(38) /* 0 if bit[25]=1 */
#define CQ_XIVE_CFG_EN_VP_SAVE_REST_STRICT PPC_BIT(39) /* 0 if bit[25]=1 */

8
include/hw/ppc/xive2.h
View file

@ -29,9 +29,11 @@ OBJECT_DECLARE_TYPE(Xive2Router, Xive2RouterClass, XIVE2_ROUTER);
* Configuration flags
*/
#define XIVE2_GEN1_TIMA_OS 0x00000001
#define XIVE2_VP_SAVE_RESTORE 0x00000002
#define XIVE2_THREADID_8BITS 0x00000004
#define XIVE2_GEN1_TIMA_OS 0x00000001
#define XIVE2_VP_SAVE_RESTORE 0x00000002
#define XIVE2_THREADID_8BITS 0x00000004
#define XIVE2_EN_VP_GRP_PRIORITY 0x00000008
#define XIVE2_VP_INT_PRIO 0x00000030
typedef struct Xive2RouterClass {
SysBusDeviceClass parent;