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envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=148.163.156.1; envelope-from=kowal@linux.ibm.com; helo=mx0a-001b2d01.pphosted.com X-Spam_score_int: -26 X-Spam_score: -2.7 X-Spam_bar: -- X-Spam_report: (-2.7 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @ibm.com) X-ZM-MESSAGEID: 1729026912192116600 Content-Type: text/plain; charset="utf-8" From: Frederic Barrat When processing a backlog scan for group interrupts, also take into account crowd interrupts. Signed-off-by: Frederic Barrat Signed-off-by: Michael Kowal --- include/hw/ppc/xive2_regs.h | 4 ++ hw/intc/xive2.c | 82 +++++++++++++++++++++++++------------ 2 files changed, 60 insertions(+), 26 deletions(-) diff --git a/include/hw/ppc/xive2_regs.h b/include/hw/ppc/xive2_regs.h index 66a419441c..89236b9aaf 100644 --- a/include/hw/ppc/xive2_regs.h +++ b/include/hw/ppc/xive2_regs.h @@ -237,4 +237,8 @@ void xive2_nvgc_pic_print_info(Xive2Nvgc *nvgc, uint32_= t nvgc_idx, #define NVx_BACKLOG_OP PPC_BITMASK(52, 53) #define NVx_BACKLOG_PRIO PPC_BITMASK(57, 59) =20 +/* split the 6-bit crowd/group level */ +#define NVx_CROWD_LVL(level) ((level >> 4) & 0b11) +#define NVx_GROUP_LVL(level) (level & 0b1111) + #endif /* PPC_XIVE2_REGS_H */ diff --git a/hw/intc/xive2.c b/hw/intc/xive2.c index 1f2837104c..41d689eaab 100644 --- a/hw/intc/xive2.c +++ b/hw/intc/xive2.c @@ -367,6 +367,35 @@ static void xive2_end_enqueue(Xive2End *end, uint32_t = data) end->w1 =3D xive_set_field32(END2_W1_PAGE_OFF, end->w1, qindex); } =20 +static void xive2_pgofnext(uint8_t *nvgc_blk, uint32_t *nvgc_idx, + uint8_t next_level) +{ + uint32_t mask, next_idx; + uint8_t next_blk; + + /* + * Adjust the block and index of a VP for the next group/crowd + * size (PGofFirst/PGofNext field in the NVP and NVGC structures). + * + * The 6-bit group level is split into a 2-bit crowd and 4-bit + * group levels. Encoding is similar. However, we don't support + * crowd size of 8. So a crowd level of 0b11 is bumped to a crowd + * size of 16. + */ + next_blk =3D NVx_CROWD_LVL(next_level); + if (next_blk =3D=3D 3) { + next_blk =3D 4; + } + mask =3D (1 << next_blk) - 1; + *nvgc_blk &=3D ~mask; + *nvgc_blk |=3D mask >> 1; + + next_idx =3D NVx_GROUP_LVL(next_level); + mask =3D (1 << next_idx) - 1; + *nvgc_idx &=3D ~mask; + *nvgc_idx |=3D mask >> 1; +} + /* * Scan the group chain and return the highest priority and group * level of pending group interrupts. @@ -377,29 +406,28 @@ static uint8_t xive2_presenter_backlog_check(XivePres= enter *xptr, uint8_t *out_level) { Xive2Router *xrtr =3D XIVE2_ROUTER(xptr); - uint32_t nvgc_idx, mask; + uint32_t nvgc_idx; uint32_t current_level, count; - uint8_t prio; + uint8_t nvgc_blk, prio; Xive2Nvgc nvgc; =20 for (prio =3D 0; prio <=3D XIVE_PRIORITY_MAX; prio++) { - current_level =3D first_group & 0xF; + current_level =3D first_group & 0x3F; + nvgc_blk =3D nvp_blk; + nvgc_idx =3D nvp_idx; =20 while (current_level) { - mask =3D (1 << current_level) - 1; - nvgc_idx =3D nvp_idx & ~mask; - nvgc_idx |=3D mask >> 1; - qemu_log("fxb %s checking backlog for prio %d group idx %x\n", - __func__, prio, nvgc_idx); - - if (xive2_router_get_nvgc(xrtr, false, nvp_blk, nvgc_idx, &nvg= c)) { - qemu_log_mask(LOG_GUEST_ERROR, "XIVE: No NVG %x/%x\n", - nvp_blk, nvgc_idx); + xive2_pgofnext(&nvgc_blk, &nvgc_idx, current_level); + + if (xive2_router_get_nvgc(xrtr, NVx_CROWD_LVL(current_level), + nvgc_blk, nvgc_idx, &nvgc)) { + qemu_log_mask(LOG_GUEST_ERROR, "XIVE: No NVGC %x/%x\n", + nvgc_blk, nvgc_idx); return 0xFF; } if (!xive2_nvgc_is_valid(&nvgc)) { - qemu_log_mask(LOG_GUEST_ERROR, "XIVE: Invalid NVG %x/%x\n", - nvp_blk, nvgc_idx); + qemu_log_mask(LOG_GUEST_ERROR, "XIVE: Invalid NVGC %x/%x\n= ", + nvgc_blk, nvgc_idx); return 0xFF; } =20 @@ -408,7 +436,7 @@ static uint8_t xive2_presenter_backlog_check(XivePresen= ter *xptr, *out_level =3D current_level; return prio; } - current_level =3D xive_get_field32(NVGC2_W0_PGONEXT, nvgc.w0) = & 0xF; + current_level =3D xive_get_field32(NVGC2_W0_PGONEXT, nvgc.w0) = & 0x3F; } } return 0xFF; @@ -420,22 +448,23 @@ static void xive2_presenter_backlog_decr(XivePresente= r *xptr, uint8_t group_level) { Xive2Router *xrtr =3D XIVE2_ROUTER(xptr); - uint32_t nvgc_idx, mask, count; + uint32_t nvgc_idx, count; + uint8_t nvgc_blk; Xive2Nvgc nvgc; =20 - group_level &=3D 0xF; - mask =3D (1 << group_level) - 1; - nvgc_idx =3D nvp_idx & ~mask; - nvgc_idx |=3D mask >> 1; + nvgc_blk =3D nvp_blk; + nvgc_idx =3D nvp_idx; + xive2_pgofnext(&nvgc_blk, &nvgc_idx, group_level); =20 - if (xive2_router_get_nvgc(xrtr, false, nvp_blk, nvgc_idx, &nvgc)) { - qemu_log_mask(LOG_GUEST_ERROR, "XIVE: No NVG %x/%x\n", - nvp_blk, nvgc_idx); + if (xive2_router_get_nvgc(xrtr, NVx_CROWD_LVL(group_level), + nvgc_blk, nvgc_idx, &nvgc)) { + qemu_log_mask(LOG_GUEST_ERROR, "XIVE: No NVGC %x/%x\n", + nvgc_blk, nvgc_idx); return; } if (!xive2_nvgc_is_valid(&nvgc)) { - qemu_log_mask(LOG_GUEST_ERROR, "XIVE: Invalid NVG %x/%x\n", - nvp_blk, nvgc_idx); + qemu_log_mask(LOG_GUEST_ERROR, "XIVE: Invalid NVGC %x/%x\n", + nvgc_blk, nvgc_idx); return; } count =3D xive2_nvgc_get_backlog(&nvgc, group_prio); @@ -443,7 +472,8 @@ static void xive2_presenter_backlog_decr(XivePresenter = *xptr, return; } xive2_nvgc_set_backlog(&nvgc, group_prio, count - 1); - xive2_router_write_nvgc(xrtr, false, nvp_blk, nvgc_idx, &nvgc); + xive2_router_write_nvgc(xrtr, NVx_CROWD_LVL(group_level), + nvgc_blk, nvgc_idx, &nvgc); } =20 /* --=20 2.43.0