From: Glenn Miles Date: Mon, 12 May 2025 03:10:26 +0000 (+1000) Subject: pnv/xive2: Support ESB Escalation X-Git-Tag: v10.1.0-rc0~2^2~33 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=c2cee7477f4af8cdfc33c5bb5928a3a1862655ee;p=thirdparty%2Fqemu.git pnv/xive2: Support ESB Escalation Add support for XIVE ESB Interrupt Escalation. Suggested-by: Michael Kowal [This change was taken from a patch provided by Michael Kowal.] Signed-off-by: Glenn Miles Reviewed-by: Nicholas Piggin Reviewed-by: Michael Kowal Reviewed-by: Caleb Schlossin Tested-by: Gautam Menghani Link: https://lore.kernel.org/qemu-devel/20250512031100.439842-18-npiggin@gmail.com Signed-off-by: Cédric Le Goater --- diff --git a/hw/intc/xive2.c b/hw/intc/xive2.c index cca121b5f1..541b05225c 100644 --- a/hw/intc/xive2.c +++ b/hw/intc/xive2.c @@ -1552,18 +1552,39 @@ do_escalation: } } - /* - * The END trigger becomes an Escalation trigger - */ - xive2_router_end_notify(xrtr, - xive_get_field32(END2_W4_END_BLOCK, end.w4), - xive_get_field32(END2_W4_ESC_END_INDEX, end.w4), - xive_get_field32(END2_W5_ESC_END_DATA, end.w5)); + if (xive2_end_is_escalate_end(&end)) { + /* + * Perform END Adaptive escalation processing + * The END trigger becomes an Escalation trigger + */ + xive2_router_end_notify(xrtr, + xive_get_field32(END2_W4_END_BLOCK, end.w4), + xive_get_field32(END2_W4_ESC_END_INDEX, end.w4), + xive_get_field32(END2_W5_ESC_END_DATA, end.w5)); + } /* end END adaptive escalation */ + + else { + uint32_t lisn; /* Logical Interrupt Source Number */ + + /* + * Perform ESB escalation processing + * E[N] == 1 --> N + * Req[Block] <- E[ESB_Block] + * Req[Index] <- E[ESB_Index] + * Req[Offset] <- 0x000 + * Execute Req command + */ + lisn = XIVE_EAS(xive_get_field32(END2_W4_END_BLOCK, end.w4), + xive_get_field32(END2_W4_ESC_END_INDEX, end.w4)); + + xive2_notify(xrtr, lisn, true /* pq_checked */); + } + + return; } -void xive2_router_notify(XiveNotifier *xn, uint32_t lisn, bool pq_checked) +void xive2_notify(Xive2Router *xrtr , uint32_t lisn, bool pq_checked) { - Xive2Router *xrtr = XIVE2_ROUTER(xn); uint8_t eas_blk = XIVE_EAS_BLOCK(lisn); uint32_t eas_idx = XIVE_EAS_INDEX(lisn); Xive2Eas eas; @@ -1606,13 +1627,30 @@ void xive2_router_notify(XiveNotifier *xn, uint32_t lisn, bool pq_checked) return; } + /* TODO: add support for EAS resume */ + if (xive2_eas_is_resume(&eas)) { + qemu_log_mask(LOG_UNIMP, + "XIVE: EAS resume processing unimplemented - LISN %x\n", + lisn); + return; + } + /* * The event trigger becomes an END trigger */ xive2_router_end_notify(xrtr, - xive_get_field64(EAS2_END_BLOCK, eas.w), - xive_get_field64(EAS2_END_INDEX, eas.w), - xive_get_field64(EAS2_END_DATA, eas.w)); + xive_get_field64(EAS2_END_BLOCK, eas.w), + xive_get_field64(EAS2_END_INDEX, eas.w), + xive_get_field64(EAS2_END_DATA, eas.w)); + return; +} + +void xive2_router_notify(XiveNotifier *xn, uint32_t lisn, bool pq_checked) +{ + Xive2Router *xrtr = XIVE2_ROUTER(xn); + + xive2_notify(xrtr, lisn, pq_checked); + return; } static const Property xive2_router_properties[] = { diff --git a/include/hw/ppc/xive2.h b/include/hw/ppc/xive2.h index 8cdf819174..2436ddb5e5 100644 --- a/include/hw/ppc/xive2.h +++ b/include/hw/ppc/xive2.h @@ -80,6 +80,7 @@ int xive2_router_write_nvgc(Xive2Router *xrtr, bool crowd, uint32_t xive2_router_get_config(Xive2Router *xrtr); void xive2_router_notify(XiveNotifier *xn, uint32_t lisn, bool pq_checked); +void xive2_notify(Xive2Router *xrtr, uint32_t lisn, bool pq_checked); /* * XIVE2 Presenter (POWER10) diff --git a/include/hw/ppc/xive2_regs.h b/include/hw/ppc/xive2_regs.h index 3c28de8a30..2c535ec0d0 100644 --- a/include/hw/ppc/xive2_regs.h +++ b/include/hw/ppc/xive2_regs.h @@ -39,15 +39,18 @@ typedef struct Xive2Eas { uint64_t w; -#define EAS2_VALID PPC_BIT(0) -#define EAS2_END_BLOCK PPC_BITMASK(4, 7) /* Destination EQ block# */ -#define EAS2_END_INDEX PPC_BITMASK(8, 31) /* Destination EQ index */ -#define EAS2_MASKED PPC_BIT(32) /* Masked */ -#define EAS2_END_DATA PPC_BITMASK(33, 63) /* written to the EQ */ +#define EAS2_VALID PPC_BIT(0) +#define EAS2_QOS PPC_BIT(1, 2) /* Quality of Service(unimp) */ +#define EAS2_RESUME PPC_BIT(3) /* END Resume(unimp) */ +#define EAS2_END_BLOCK PPC_BITMASK(4, 7) /* Destination EQ block# */ +#define EAS2_END_INDEX PPC_BITMASK(8, 31) /* Destination EQ index */ +#define EAS2_MASKED PPC_BIT(32) /* Masked */ +#define EAS2_END_DATA PPC_BITMASK(33, 63) /* written to the EQ */ } Xive2Eas; #define xive2_eas_is_valid(eas) (be64_to_cpu((eas)->w) & EAS2_VALID) #define xive2_eas_is_masked(eas) (be64_to_cpu((eas)->w) & EAS2_MASKED) +#define xive2_eas_is_resume(eas) (be64_to_cpu((eas)->w) & EAS2_RESUME) void xive2_eas_pic_print_info(Xive2Eas *eas, uint32_t lisn, GString *buf);