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FAILED: patch "[PATCH] PCI: brcmstb: Fix disabling L0s capability" failed to apply to 6.1-stable tree

by gregkh＠linuxfoundation.org

3 days, 1 hour

FAILED: patch "[PATCH] PCI: brcmstb: Fix disabling L0s capability" failed to apply to 6.6-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.6-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.6.y git checkout FETCH_HEAD git cherry-pick -x 9583f9d22991d2cfb5cc59a2552040c4ae98d998 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2026010520-wreckage-quantum-ba65@gregkh' --subject-prefix 'PATCH 6.6.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 9583f9d22991d2cfb5cc59a2552040c4ae98d998 Mon Sep 17 00:00:00 2001 From: Jim Quinlan <james.quinlan(a)broadcom.com> Date: Fri, 3 Oct 2025 13:04:36 -0400 Subject: [PATCH] PCI: brcmstb: Fix disabling L0s capability caab002d5069 ("PCI: brcmstb: Disable L0s component of ASPM if requested") set PCI_EXP_LNKCAP_ASPM_L1 and (optionally) PCI_EXP_LNKCAP_ASPM_L0S in PCI_EXP_LNKCAP (aka PCIE_RC_CFG_PRIV1_LINK_CAPABILITY in brcmstb). But instead of using PCI_EXP_LNKCAP_ASPM_L1 and PCI_EXP_LNKCAP_ASPM_L0S directly, it used PCIE_LINK_STATE_L1 and PCIE_LINK_STATE_L0S, which are Linux-created values that only coincidentally matched the PCIe spec. b478e162f227 ("PCI/ASPM: Consolidate link state defines") later changed them so they no longer matched the PCIe spec, so the bits ended up in the wrong place in PCI_EXP_LNKCAP. Use PCI_EXP_LNKCAP_ASPM_L0S to clear L0s support when there's an 'aspm-no-l0s' property. Rely on brcmstb hardware to advertise L0s and/or L1 support otherwise. Fixes: caab002d5069 ("PCI: brcmstb: Disable L0s component of ASPM if requested") Reported-by: Bjorn Helgaas <bhelgaas(a)google.com> Closes: https://lore.kernel.org/linux-pci/20250925194424.GA2197200@bhelgaas Signed-off-by: Jim Quinlan <james.quinlan(a)broadcom.com> [mani: reworded subject and description, added closes tag and CCed stable] Signed-off-by: Manivannan Sadhasivam <mani(a)kernel.org> [bhelgaas: commit log] Signed-off-by: Bjorn Helgaas <bhelgaas(a)google.com> Reviewed-by: Florian Fainelli <florian.fainelli(a)broadcom.com> Cc: stable(a)vger.kernel.org Link: https://patch.msgid.link/20251003170436.1446030-1-james.quinlan@broadcom.com diff --git a/drivers/pci/controller/pcie-brcmstb.c b/drivers/pci/controller/pcie-brcmstb.c index 9afbd02ded35..7e9b2f6a604a 100644 --- a/drivers/pci/controller/pcie-brcmstb.c +++ b/drivers/pci/controller/pcie-brcmstb.c @@ -48,7 +48,6 @@ #define PCIE_RC_CFG_PRIV1_LINK_CAPABILITY 0x04dc #define PCIE_RC_CFG_PRIV1_LINK_CAPABILITY_MAX_LINK_WIDTH_MASK 0x1f0 -#define PCIE_RC_CFG_PRIV1_LINK_CAPABILITY_ASPM_SUPPORT_MASK 0xc00 #define PCIE_RC_CFG_PRIV1_ROOT_CAP 0x4f8 #define PCIE_RC_CFG_PRIV1_ROOT_CAP_L1SS_MODE_MASK 0xf8 @@ -1075,7 +1074,7 @@ static int brcm_pcie_setup(struct brcm_pcie *pcie) void __iomem *base = pcie->base; struct pci_host_bridge *bridge; struct resource_entry *entry; - u32 tmp, burst, aspm_support, num_lanes, num_lanes_cap; + u32 tmp, burst, num_lanes, num_lanes_cap; u8 num_out_wins = 0; int num_inbound_wins = 0; int memc, ret; @@ -1175,12 +1174,9 @@ static int brcm_pcie_setup(struct brcm_pcie *pcie) /* Don't advertise L0s capability if 'aspm-no-l0s' */ - aspm_support = PCIE_LINK_STATE_L1; - if (!of_property_read_bool(pcie->np, "aspm-no-l0s")) - aspm_support |= PCIE_LINK_STATE_L0S; tmp = readl(base + PCIE_RC_CFG_PRIV1_LINK_CAPABILITY); - u32p_replace_bits(&tmp, aspm_support, - PCIE_RC_CFG_PRIV1_LINK_CAPABILITY_ASPM_SUPPORT_MASK); + if (of_property_read_bool(pcie->np, "aspm-no-l0s")) + tmp &= ~PCI_EXP_LNKCAP_ASPM_L0S; writel(tmp, base + PCIE_RC_CFG_PRIV1_LINK_CAPABILITY); /* 'tmp' still holds the contents of PRIV1_LINK_CAPABILITY */

3 days, 1 hour

[PATCH] iommu/arm-smmu-v3: Maintain valid access attributes for non-coherent SMMU

by Dawei Li

According to SMMUv3 architecture specification, IO-coherent access for SMMU is supported for: - Translation table walks. - Fetches of L1STD, STE, L1CD and CD. - Command queue, Event queue and PRI queue access. - GERROR, CMD_SYNC, Event queue and PRI queue MSIs, if supported In other words, if a SMMU implementation doesn't support IO coherent access(SMMUIDR0.COHACC==0), all fields above accessed by SMMU is expected to be non-coherent and S/W is supposed to maintain proper access attributes to achieve expected behavior. Unfortunately, for non-coherent SMMU implementation, current codebase only takes care of translation table walking. Fix it by providing right attributes(cacheability, shareablility, cache allocation hints, e.g) to other fields. Fixes: 4f41845b3407 ("iommu/io-pgtable: Replace IO_PGTABLE_QUIRK_NO_DMA with specific flag") Fixes: 9e6ea59f3ff3 ("iommu/io-pgtable: Support non-coherent page tables") Cc: stable(a)vger.kernel.org Signed-off-by: Dawei Li <dawei.li(a)linux.dev> --- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 73 +++++++++++++++------ drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h | 1 + 2 files changed, 54 insertions(+), 20 deletions(-) diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c index d16d35c78c06..4f00bf53d26c 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c @@ -265,8 +265,14 @@ static int queue_remove_raw(struct arm_smmu_queue *q, u64 *ent) return 0; } +static __always_inline bool smmu_coherent(struct arm_smmu_device *smmu) +{ + return !!(smmu->features & ARM_SMMU_FEAT_COHERENCY); +} + /* High-level queue accessors */ -static int arm_smmu_cmdq_build_cmd(u64 *cmd, struct arm_smmu_cmdq_ent *ent) +static int arm_smmu_cmdq_build_cmd(u64 *cmd, struct arm_smmu_cmdq_ent *ent, + struct arm_smmu_device *smmu) { memset(cmd, 0, 1 << CMDQ_ENT_SZ_SHIFT); cmd[0] |= FIELD_PREP(CMDQ_0_OP, ent->opcode); @@ -358,8 +364,13 @@ static int arm_smmu_cmdq_build_cmd(u64 *cmd, struct arm_smmu_cmdq_ent *ent) } else { cmd[0] |= FIELD_PREP(CMDQ_SYNC_0_CS, CMDQ_SYNC_0_CS_SEV); } - cmd[0] |= FIELD_PREP(CMDQ_SYNC_0_MSH, ARM_SMMU_SH_ISH); - cmd[0] |= FIELD_PREP(CMDQ_SYNC_0_MSIATTR, ARM_SMMU_MEMATTR_OIWB); + if (smmu_coherent(smmu)) { + cmd[0] |= FIELD_PREP(CMDQ_SYNC_0_MSH, ARM_SMMU_SH_ISH); + cmd[0] |= FIELD_PREP(CMDQ_SYNC_0_MSIATTR, ARM_SMMU_MEMATTR_OIWB); + } else { + cmd[0] |= FIELD_PREP(CMDQ_SYNC_0_MSH, ARM_SMMU_SH_OSH); + cmd[0] |= FIELD_PREP(CMDQ_SYNC_0_MSIATTR, ARM_SMMU_MEMATTR_OINC); + } break; default: return -ENOENT; @@ -405,7 +416,7 @@ static void arm_smmu_cmdq_build_sync_cmd(u64 *cmd, struct arm_smmu_device *smmu, q->ent_dwords * 8; } - arm_smmu_cmdq_build_cmd(cmd, &ent); + arm_smmu_cmdq_build_cmd(cmd, &ent, smmu); if (arm_smmu_cmdq_needs_busy_polling(smmu, cmdq)) u64p_replace_bits(cmd, CMDQ_SYNC_0_CS_NONE, CMDQ_SYNC_0_CS); } @@ -461,7 +472,7 @@ void __arm_smmu_cmdq_skip_err(struct arm_smmu_device *smmu, dev_err(smmu->dev, "\t0x%016llx\n", (unsigned long long)cmd[i]); /* Convert the erroneous command into a CMD_SYNC */ - arm_smmu_cmdq_build_cmd(cmd, &cmd_sync); + arm_smmu_cmdq_build_cmd(cmd, &cmd_sync, smmu); if (arm_smmu_cmdq_needs_busy_polling(smmu, cmdq)) u64p_replace_bits(cmd, CMDQ_SYNC_0_CS_NONE, CMDQ_SYNC_0_CS); @@ -913,7 +924,7 @@ static int __arm_smmu_cmdq_issue_cmd(struct arm_smmu_device *smmu, { u64 cmd[CMDQ_ENT_DWORDS]; - if (unlikely(arm_smmu_cmdq_build_cmd(cmd, ent))) { + if (unlikely(arm_smmu_cmdq_build_cmd(cmd, ent, smmu))) { dev_warn(smmu->dev, "ignoring unknown CMDQ opcode 0x%x\n", ent->opcode); return -EINVAL; @@ -965,7 +976,7 @@ static void arm_smmu_cmdq_batch_add(struct arm_smmu_device *smmu, } index = cmds->num * CMDQ_ENT_DWORDS; - if (unlikely(arm_smmu_cmdq_build_cmd(&cmds->cmds[index], cmd))) { + if (unlikely(arm_smmu_cmdq_build_cmd(&cmds->cmds[index], cmd, smmu))) { dev_warn(smmu->dev, "ignoring unknown CMDQ opcode 0x%x\n", cmd->opcode); return; @@ -1603,6 +1614,7 @@ void arm_smmu_make_cdtable_ste(struct arm_smmu_ste *target, { struct arm_smmu_ctx_desc_cfg *cd_table = &master->cd_table; struct arm_smmu_device *smmu = master->smmu; + u64 val; memset(target, 0, sizeof(*target)); target->data[0] = cpu_to_le64( @@ -1612,11 +1624,18 @@ void arm_smmu_make_cdtable_ste(struct arm_smmu_ste *target, (cd_table->cdtab_dma & STRTAB_STE_0_S1CTXPTR_MASK) | FIELD_PREP(STRTAB_STE_0_S1CDMAX, cd_table->s1cdmax)); + if (smmu_coherent(smmu)) { + val = FIELD_PREP(STRTAB_STE_1_S1CIR, STRTAB_STE_1_S1C_CACHE_WBRA) | + FIELD_PREP(STRTAB_STE_1_S1COR, STRTAB_STE_1_S1C_CACHE_WBRA) | + FIELD_PREP(STRTAB_STE_1_S1CSH, ARM_SMMU_SH_ISH); + } else { + val = FIELD_PREP(STRTAB_STE_1_S1CIR, STRTAB_STE_1_S1C_CACHE_NC) | + FIELD_PREP(STRTAB_STE_1_S1COR, STRTAB_STE_1_S1C_CACHE_NC) | + FIELD_PREP(STRTAB_STE_1_S1CSH, ARM_SMMU_SH_OSH); + } + target->data[1] = cpu_to_le64( - FIELD_PREP(STRTAB_STE_1_S1DSS, s1dss) | - FIELD_PREP(STRTAB_STE_1_S1CIR, STRTAB_STE_1_S1C_CACHE_WBRA) | - FIELD_PREP(STRTAB_STE_1_S1COR, STRTAB_STE_1_S1C_CACHE_WBRA) | - FIELD_PREP(STRTAB_STE_1_S1CSH, ARM_SMMU_SH_ISH) | + FIELD_PREP(STRTAB_STE_1_S1DSS, s1dss) | val | ((smmu->features & ARM_SMMU_FEAT_STALLS && !master->stall_enabled) ? STRTAB_STE_1_S1STALLD : @@ -3746,7 +3765,7 @@ int arm_smmu_init_one_queue(struct arm_smmu_device *smmu, q->cons_reg = page + cons_off; q->ent_dwords = dwords; - q->q_base = Q_BASE_RWA; + q->q_base = smmu_coherent(smmu) ? Q_BASE_RWA : 0; q->q_base |= q->base_dma & Q_BASE_ADDR_MASK; q->q_base |= FIELD_PREP(Q_BASE_LOG2SIZE, q->llq.max_n_shift); @@ -4093,6 +4112,7 @@ static void arm_smmu_write_strtab(struct arm_smmu_device *smmu) struct arm_smmu_strtab_cfg *cfg = &smmu->strtab_cfg; dma_addr_t dma; u32 reg; + u64 val; if (smmu->features & ARM_SMMU_FEAT_2_LVL_STRTAB) { reg = FIELD_PREP(STRTAB_BASE_CFG_FMT, @@ -4107,8 +4127,12 @@ static void arm_smmu_write_strtab(struct arm_smmu_device *smmu) FIELD_PREP(STRTAB_BASE_CFG_LOG2SIZE, smmu->sid_bits); dma = cfg->linear.ste_dma; } - writeq_relaxed((dma & STRTAB_BASE_ADDR_MASK) | STRTAB_BASE_RA, - smmu->base + ARM_SMMU_STRTAB_BASE); + + val = dma & STRTAB_BASE_ADDR_MASK; + if (smmu_coherent(smmu)) + val |= STRTAB_BASE_RA; + + writeq_relaxed(val, smmu->base + ARM_SMMU_STRTAB_BASE); writel_relaxed(reg, smmu->base + ARM_SMMU_STRTAB_BASE_CFG); } @@ -4130,12 +4154,21 @@ static int arm_smmu_device_reset(struct arm_smmu_device *smmu) return ret; /* CR1 (table and queue memory attributes) */ - reg = FIELD_PREP(CR1_TABLE_SH, ARM_SMMU_SH_ISH) | - FIELD_PREP(CR1_TABLE_OC, CR1_CACHE_WB) | - FIELD_PREP(CR1_TABLE_IC, CR1_CACHE_WB) | - FIELD_PREP(CR1_QUEUE_SH, ARM_SMMU_SH_ISH) | - FIELD_PREP(CR1_QUEUE_OC, CR1_CACHE_WB) | - FIELD_PREP(CR1_QUEUE_IC, CR1_CACHE_WB); + if (smmu_coherent(smmu)) { + reg = FIELD_PREP(CR1_TABLE_SH, ARM_SMMU_SH_ISH) | + FIELD_PREP(CR1_TABLE_OC, CR1_CACHE_WB) | + FIELD_PREP(CR1_TABLE_IC, CR1_CACHE_WB) | + FIELD_PREP(CR1_QUEUE_SH, ARM_SMMU_SH_ISH) | + FIELD_PREP(CR1_QUEUE_OC, CR1_CACHE_WB) | + FIELD_PREP(CR1_QUEUE_IC, CR1_CACHE_WB); + } else { + reg = FIELD_PREP(CR1_TABLE_SH, ARM_SMMU_SH_OSH) | + FIELD_PREP(CR1_TABLE_OC, CR1_CACHE_NC) | + FIELD_PREP(CR1_TABLE_IC, CR1_CACHE_NC) | + FIELD_PREP(CR1_QUEUE_SH, ARM_SMMU_SH_OSH) | + FIELD_PREP(CR1_QUEUE_OC, CR1_CACHE_NC) | + FIELD_PREP(CR1_QUEUE_IC, CR1_CACHE_NC); + } writel_relaxed(reg, smmu->base + ARM_SMMU_CR1); /* CR2 (random crap) */ diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h index ae23aacc3840..7a5f76e165dc 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h @@ -183,6 +183,7 @@ struct arm_vsmmu; #define ARM_SMMU_SH_ISH 3 #define ARM_SMMU_MEMATTR_DEVICE_nGnRE 0x1 #define ARM_SMMU_MEMATTR_OIWB 0xf +#define ARM_SMMU_MEMATTR_OINC 0x5 #define Q_IDX(llq, p) ((p) & ((1 << (llq)->max_n_shift) - 1)) #define Q_WRP(llq, p) ((p) & (1 << (llq)->max_n_shift)) -- 2.25.1

3 days, 1 hour

FAILED: patch "[PATCH] powerpc/pseries/cmm: adjust BALLOON_MIGRATE when migrating" failed to apply to 6.1-stable tree

by gregkh＠linuxfoundation.org

3 days, 1 hour

[regression 5.10.y] Libvirt can no longer delete macvtap devices after backport of a6cec0bcd342 ("net: rtnetlink: add bulk delete support flag") to 5.10.y series (Debian 11)

by Salvatore Bonaccorso

Hi all, Roland Schwarzkopf reported to the Debian mailing list a problem which he encountered once updating in Debian from 5.10.244 to 5.10.247. The report is quoted below and found in https://lists.debian.org/debian-kernel/2025/12/msg00223.html Roland did bisect the changes between 5.10.244 to 5.10.247 and found that the issue is introduced with 1550f3673972 ("net: rtnetlink: add bulk delete support flag") which is the backport to the 5.10.y series. On Thu, Dec 18, 2025 at 02:59:55PM +0100, Roland Schwarzkopf wrote: > Hi Salvatore, > > On 12/17/25 20:28, Salvatore Bonaccorso wrote: > > Hi Roland, > > > > I'm CC'ing Ben Hutchings directly as well as he takes care of the > > Debian LTS kernel updates. Idellly we make this as well a proper bug > > for easier tracking. > > > > On Wed, Dec 17, 2025 at 01:35:54PM +0100, Roland Schwarzkopf wrote: > > > Hi there, > > > > > > after upgrading to the latest kernel on Debian 11 > > > (linux-image-5.10.0-37-amd64) I have an issue using libvirt with qemu/kvm > > > virtual machines and macvtap networking. When a machine is shut down, > > > libvirt can not delete the corresponding macvtap device. Thus, starting the > > > machine again is not possible. After manually removing the macvtap device > > > using `ip link delete` the vm can be started again. > > > > > > In the journal the following message is shown: > > > > > > Dec 17 13:19:27 iblis libvirtd[535]: error destroying network device macvtap0: Operation not supported > > > > > > After downgrading the kernel to linux-image-5.10.0-36-amd64, the problem > > > disappears. I tested this on a fresh minimal install of Debian 11 - to > > > exclude that anything else on my production machines is causing this issue. > > > > > > Since the older kernel does not have this issue, I assume this is related to > > > the kernel and not to libvirt? > > > > > > I tried to check for bug reports of the kernel package, but the bug tracker > > > finds no reports and even states that the package does not exist (I used the > > > "Bug reports" link on > > > https://packages.debian.org/bullseye/linux-image-5.10.0-37-amd64). This left > > > me a bit puzzled. Since I don't have experience with the debian bug > > > reporting process, I had no other idea than writing to this list. > > You would need to search for inhttps://bugs.debian.org/src:linux , > > but that said I'm not aware of any bug reports in that direction. > > > > Would you be in the position of bisecting the problem as you can say > > that 5.10.244 is good and 5.10.247 is bad and regressed? If you can do > > that that would involve compiling a couple of kernels to narrow down > > where the problem is introduced: > > > > git clone --single-branch -b linux-5.10.yhttps://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-st… > > cd linux-stable > > git checkout v5.10.244 > > cp /boot/config-$(uname -r) .config > > yes '' | make localmodconfig > > make savedefconfig > > mv defconfig arch/x86/configs/my_defconfig > > > > # test 5.10.244 to ensure this is "good" > > make my_defconfig > > make -j $(nproc) bindeb-pkg > > ... install the resulting .deb package and confirm it successfully boots / problem does not exist > > > > # test 5.10.247 to ensure this is "bad" > > git checkout v5.10.247 > > make my_defconfig > > make -j $(nproc) bindeb-pkg > > ... install the resulting .deb package and confirm it fails to boot / problem exists > > > > With that confirmed, the bisection can start: > > > > git bisect start > > git bisect good v5.10.244 > > git bisect bad v5.10.247 > > > > In each bisection step git checks out a state between the oldest > > known-bad and the newest known-good commit. In each step test using: > > > > make my_defconfig > > make -j $(nproc) bindeb-pkg > > ... install, try to boot / verify if problem exists > > > > and if the problem is hit run: > > > > git bisect bad > > > > and if the problem doesn't trigger run: > > > > git bisect good > > > > . Please pay attention to always select the just built kernel for > > booting, it won't always be the default kernel picked up by grub. > > > > Iterate until git announces to have identified the first bad commit. > > > > Then provide the output of > > > > git bisect log > > > > In the course of the bisection you might have to uninstall previous > > kernels again to not exhaust the disk space in /boot. Also in the end > > uninstall all self-built kernels again. > > I just did my first bisection \o/ (sorry) > > Here are the results: > > git bisect start > # bad: [f964b940099f9982d723d4c77988d4b0dda9c165] Linux 5.10.247 > git bisect bad f964b940099f9982d723d4c77988d4b0dda9c165 > # good: [863b76df7d1e327979946a2d3893479c3275bfa4] Linux 5.10.244 > git bisect good f52ee6ea810273e527a5d319e5f400be8c8424c1 > # good: [dc9fdb7586b90e33c766eac52b6f3d1c9ec365a1] net: usb: lan78xx: Add error handling to lan78xx_init_mac_address > git bisect good dc9fdb7586b90e33c766eac52b6f3d1c9ec365a1 > # bad: [2272d5757ce5d3fb416d9f2497b015678eb85c0d] phy: cadence: cdns-dphy: Enable lower resolutions in dphy > git bisect bad 2272d5757ce5d3fb416d9f2497b015678eb85c0d > # bad: [547539f08b9e3629ce68479889813e58c8087e70] ALSA: usb-audio: fix control pipe direction > git bisect bad 547539f08b9e3629ce68479889813e58c8087e70 > # bad: [3509c748e79435d09e730673c8c100b7f0ebc87c] most: usb: hdm_probe: Fix calling put_device() before device initialization > git bisect bad 3509c748e79435d09e730673c8c100b7f0ebc87c > # bad: [a6ebcafc2f5ff7f0d1ce0c6dc38ac09a16a56ec0] net: add ndo_fdb_del_bulk > git bisect bad a6ebcafc2f5ff7f0d1ce0c6dc38ac09a16a56ec0 > # good: [b8a72692aa42b7dcd179a96b90bc2763ac74576a] hfsplus: fix KMSAN uninit-value issue in __hfsplus_ext_cache_extent() > git bisect good b8a72692aa42b7dcd179a96b90bc2763ac74576a > # good: [2b42a595863556b394bd702d46f4a9d0d2985aaa] m68k: bitops: Fix find_*_bit() signatures > git bisect good 2b42a595863556b394bd702d46f4a9d0d2985aaa > # good: [9d9f7d71d46cff3491a443a3cf452cecf87d51ef] net: rtnetlink: use BIT for flag values > git bisect good 9d9f7d71d46cff3491a443a3cf452cecf87d51ef > # bad: [1550f3673972c5cfba714135f8bf26784e6f2b0f] net: rtnetlink: add bulk delete support flag > git bisect bad 1550f3673972c5cfba714135f8bf26784e6f2b0f > # good: [c8879afa24169e504f78c9ca43a4d0d7397049eb] net: netlink: add NLM_F_BULK delete request modifier > git bisect good c8879afa24169e504f78c9ca43a4d0d7397049eb > # first bad commit: [1550f3673972c5cfba714135f8bf26784e6f2b0f] net: rtnetlink: add bulk delete support flag > > Is there anything else I can do to help? Is there soemthing missing? Roland I think it would be helpful if you can test as well more recent stable series versions to confirm if the issue is present there as well or not, which might indicate a 5.10.y specific backporting problem. #regzbot introduced: 1550f3673972c5cfba714135f8bf26784e6f2b0f Regards, Salvatore

3 days, 2 hours

FAILED: patch "[PATCH] media: verisilicon: Fix CPU stalls on G2 bus error" failed to apply to 6.1-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.1-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.1.y git checkout FETCH_HEAD git cherry-pick -x 19c286b755072a22a063052f530a6b1fac8a1f63 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2026010508-pending-boondocks-df47@gregkh' --subject-prefix 'PATCH 6.1.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 19c286b755072a22a063052f530a6b1fac8a1f63 Mon Sep 17 00:00:00 2001 From: Nicolas Dufresne <nicolas.dufresne(a)collabora.com> Date: Mon, 22 Sep 2025 14:43:38 -0400 Subject: [PATCH] media: verisilicon: Fix CPU stalls on G2 bus error In some seek stress tests, we are getting IRQ from the G2 decoder where the dec_bus_int and the dec_e bits are high, meaning the decoder is still running despite the error. Fix this by reworking the IRQ handler to only finish the job once we have reached completion and move the software reset to when our software watchdog triggers. This way, we let the hardware continue on errors when it did not self reset and in worse case scenario the hardware timeout will automatically stop it. The actual error will be fixed in a follow up patch. Fixes: 3385c514ecc5a ("media: hantro: Convert imx8m_vpu_g2_irq to helper") Cc: stable(a)vger.kernel.org Reviewed-by: Benjamin Gaignard <benjamin.gaignard(a)collabora.com> Signed-off-by: Nicolas Dufresne <nicolas.dufresne(a)collabora.com> Signed-off-by: Hans Verkuil <hverkuil+cisco(a)kernel.org> diff --git a/drivers/media/platform/verisilicon/hantro_g2.c b/drivers/media/platform/verisilicon/hantro_g2.c index aae0b562fabb..318673b66da8 100644 --- a/drivers/media/platform/verisilicon/hantro_g2.c +++ b/drivers/media/platform/verisilicon/hantro_g2.c @@ -5,43 +5,93 @@ * Copyright (C) 2021 Collabora Ltd, Andrzej Pietrasiewicz <andrzej.p(a)collabora.com> */ +#include <linux/delay.h> #include "hantro_hw.h" #include "hantro_g2_regs.h" #define G2_ALIGN 16 -void hantro_g2_check_idle(struct hantro_dev *vpu) +static bool hantro_g2_active(struct hantro_ctx *ctx) { - int i; + struct hantro_dev *vpu = ctx->dev; + u32 status; - for (i = 0; i < 3; i++) { - u32 status; + status = vdpu_read(vpu, G2_REG_INTERRUPT); - /* Make sure the VPU is idle */ - status = vdpu_read(vpu, G2_REG_INTERRUPT); - if (status & G2_REG_INTERRUPT_DEC_E) { - dev_warn(vpu->dev, "device still running, aborting"); - status |= G2_REG_INTERRUPT_DEC_ABORT_E | G2_REG_INTERRUPT_DEC_IRQ_DIS; - vdpu_write(vpu, status, G2_REG_INTERRUPT); - } + return (status & G2_REG_INTERRUPT_DEC_E); +} + +/** + * hantro_g2_reset: + * @ctx: the hantro context + * + * Emulates a reset using Hantro abort function. Failing this procedure would + * results in programming a running IP which leads to CPU hang. + * + * Using a hard reset procedure instead is prefferred. + */ +void hantro_g2_reset(struct hantro_ctx *ctx) +{ + struct hantro_dev *vpu = ctx->dev; + u32 status; + + status = vdpu_read(vpu, G2_REG_INTERRUPT); + if (status & G2_REG_INTERRUPT_DEC_E) { + dev_warn_ratelimited(vpu->dev, "device still running, aborting"); + status |= G2_REG_INTERRUPT_DEC_ABORT_E | G2_REG_INTERRUPT_DEC_IRQ_DIS; + vdpu_write(vpu, status, G2_REG_INTERRUPT); + + do { + mdelay(1); + } while (hantro_g2_active(ctx)); } } irqreturn_t hantro_g2_irq(int irq, void *dev_id) { struct hantro_dev *vpu = dev_id; - enum vb2_buffer_state state; u32 status; status = vdpu_read(vpu, G2_REG_INTERRUPT); - state = (status & G2_REG_INTERRUPT_DEC_RDY_INT) ? - VB2_BUF_STATE_DONE : VB2_BUF_STATE_ERROR; - vdpu_write(vpu, 0, G2_REG_INTERRUPT); - vdpu_write(vpu, G2_REG_CONFIG_DEC_CLK_GATE_E, G2_REG_CONFIG); + if (!(status & G2_REG_INTERRUPT_DEC_IRQ)) + return IRQ_NONE; - hantro_irq_done(vpu, state); + hantro_reg_write(vpu, &g2_dec_irq, 0); + hantro_reg_write(vpu, &g2_dec_int_stat, 0); + hantro_reg_write(vpu, &g2_clk_gate_e, 1); + if (status & G2_REG_INTERRUPT_DEC_RDY_INT) { + hantro_irq_done(vpu, VB2_BUF_STATE_DONE); + return IRQ_HANDLED; + } + + if (status & G2_REG_INTERRUPT_DEC_ABORT_INT) { + /* disabled on abort, though lets be safe and handle it */ + dev_warn_ratelimited(vpu->dev, "decode operation aborted."); + return IRQ_HANDLED; + } + + if (status & G2_REG_INTERRUPT_DEC_LAST_SLICE_INT) + dev_warn_ratelimited(vpu->dev, "not all macroblocks were decoded."); + + if (status & G2_REG_INTERRUPT_DEC_BUS_INT) + dev_warn_ratelimited(vpu->dev, "bus error detected."); + + if (status & G2_REG_INTERRUPT_DEC_ERROR_INT) + dev_warn_ratelimited(vpu->dev, "decode error detected."); + + if (status & G2_REG_INTERRUPT_DEC_TIMEOUT) + dev_warn_ratelimited(vpu->dev, "frame decode timed out."); + + /** + * If the decoding haven't stopped, let it continue. The hardware timeout + * will trigger if it is trully stuck. + */ + if (status & G2_REG_INTERRUPT_DEC_E) + return IRQ_HANDLED; + + hantro_irq_done(vpu, VB2_BUF_STATE_ERROR); return IRQ_HANDLED; } diff --git a/drivers/media/platform/verisilicon/hantro_g2_hevc_dec.c b/drivers/media/platform/verisilicon/hantro_g2_hevc_dec.c index 0e212198dd65..f066636e56f9 100644 --- a/drivers/media/platform/verisilicon/hantro_g2_hevc_dec.c +++ b/drivers/media/platform/verisilicon/hantro_g2_hevc_dec.c @@ -582,8 +582,6 @@ int hantro_g2_hevc_dec_run(struct hantro_ctx *ctx) struct hantro_dev *vpu = ctx->dev; int ret; - hantro_g2_check_idle(vpu); - /* Prepare HEVC decoder context. */ ret = hantro_hevc_dec_prepare_run(ctx); if (ret) diff --git a/drivers/media/platform/verisilicon/hantro_g2_regs.h b/drivers/media/platform/verisilicon/hantro_g2_regs.h index b943b1816db7..c614951121c7 100644 --- a/drivers/media/platform/verisilicon/hantro_g2_regs.h +++ b/drivers/media/platform/verisilicon/hantro_g2_regs.h @@ -22,7 +22,14 @@ #define G2_REG_VERSION G2_SWREG(0) #define G2_REG_INTERRUPT G2_SWREG(1) +#define G2_REG_INTERRUPT_DEC_LAST_SLICE_INT BIT(19) +#define G2_REG_INTERRUPT_DEC_TIMEOUT BIT(18) +#define G2_REG_INTERRUPT_DEC_ERROR_INT BIT(16) +#define G2_REG_INTERRUPT_DEC_BUF_INT BIT(14) +#define G2_REG_INTERRUPT_DEC_BUS_INT BIT(13) #define G2_REG_INTERRUPT_DEC_RDY_INT BIT(12) +#define G2_REG_INTERRUPT_DEC_ABORT_INT BIT(11) +#define G2_REG_INTERRUPT_DEC_IRQ BIT(8) #define G2_REG_INTERRUPT_DEC_ABORT_E BIT(5) #define G2_REG_INTERRUPT_DEC_IRQ_DIS BIT(4) #define G2_REG_INTERRUPT_DEC_E BIT(0) @@ -35,6 +42,9 @@ #define BUS_WIDTH_128 2 #define BUS_WIDTH_256 3 +#define g2_dec_int_stat G2_DEC_REG(1, 11, 0xf) +#define g2_dec_irq G2_DEC_REG(1, 8, 0x1) + #define g2_strm_swap G2_DEC_REG(2, 28, 0xf) #define g2_strm_swap_old G2_DEC_REG(2, 27, 0x1f) #define g2_pic_swap G2_DEC_REG(2, 22, 0x1f) @@ -225,6 +235,9 @@ #define vp9_filt_level_seg5 G2_DEC_REG(19, 8, 0x3f) #define vp9_quant_seg5 G2_DEC_REG(19, 0, 0xff) +#define g2_timemout_override_e G2_DEC_REG(45, 31, 0x1) +#define g2_timemout_cycles G2_DEC_REG(45, 0, 0x7fffffff) + #define hevc_cur_poc_00 G2_DEC_REG(46, 24, 0xff) #define hevc_cur_poc_01 G2_DEC_REG(46, 16, 0xff) #define hevc_cur_poc_02 G2_DEC_REG(46, 8, 0xff) diff --git a/drivers/media/platform/verisilicon/hantro_g2_vp9_dec.c b/drivers/media/platform/verisilicon/hantro_g2_vp9_dec.c index 82a478ac645e..56c79e339030 100644 --- a/drivers/media/platform/verisilicon/hantro_g2_vp9_dec.c +++ b/drivers/media/platform/verisilicon/hantro_g2_vp9_dec.c @@ -893,8 +893,6 @@ int hantro_g2_vp9_dec_run(struct hantro_ctx *ctx) struct vb2_v4l2_buffer *dst; int ret; - hantro_g2_check_idle(ctx->dev); - ret = start_prepare_run(ctx, &decode_params); if (ret) { hantro_end_prepare_run(ctx); diff --git a/drivers/media/platform/verisilicon/hantro_hw.h b/drivers/media/platform/verisilicon/hantro_hw.h index c9b6556f8b2b..5f2011529f02 100644 --- a/drivers/media/platform/verisilicon/hantro_hw.h +++ b/drivers/media/platform/verisilicon/hantro_hw.h @@ -583,6 +583,7 @@ void hantro_g2_vp9_dec_done(struct hantro_ctx *ctx); int hantro_vp9_dec_init(struct hantro_ctx *ctx); void hantro_vp9_dec_exit(struct hantro_ctx *ctx); void hantro_g2_check_idle(struct hantro_dev *vpu); +void hantro_g2_reset(struct hantro_ctx *ctx); irqreturn_t hantro_g2_irq(int irq, void *dev_id); #endif /* HANTRO_HW_H_ */ diff --git a/drivers/media/platform/verisilicon/imx8m_vpu_hw.c b/drivers/media/platform/verisilicon/imx8m_vpu_hw.c index f9f276385c11..5be0e2e76882 100644 --- a/drivers/media/platform/verisilicon/imx8m_vpu_hw.c +++ b/drivers/media/platform/verisilicon/imx8m_vpu_hw.c @@ -294,11 +294,13 @@ static const struct hantro_codec_ops imx8mq_vpu_g1_codec_ops[] = { static const struct hantro_codec_ops imx8mq_vpu_g2_codec_ops[] = { [HANTRO_MODE_HEVC_DEC] = { .run = hantro_g2_hevc_dec_run, + .reset = hantro_g2_reset, .init = hantro_hevc_dec_init, .exit = hantro_hevc_dec_exit, }, [HANTRO_MODE_VP9_DEC] = { .run = hantro_g2_vp9_dec_run, + .reset = hantro_g2_reset, .done = hantro_g2_vp9_dec_done, .init = hantro_vp9_dec_init, .exit = hantro_vp9_dec_exit,

3 days, 2 hours

FAILED: patch "[PATCH] powerpc/pseries/cmm: adjust BALLOON_MIGRATE when migrating" failed to apply to 6.6-stable tree

by gregkh＠linuxfoundation.org

3 days, 2 hours

FAILED: patch "[PATCH] powerpc/pseries/cmm: adjust BALLOON_MIGRATE when migrating" failed to apply to 6.12-stable tree

by gregkh＠linuxfoundation.org

3 days, 2 hours

FAILED: patch "[PATCH] PCI: brcmstb: Fix disabling L0s capability" failed to apply to 6.12-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.12-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.12.y git checkout FETCH_HEAD git cherry-pick -x 9583f9d22991d2cfb5cc59a2552040c4ae98d998 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2026010519-syndrome-eccentric-90f2@gregkh' --subject-prefix 'PATCH 6.12.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 9583f9d22991d2cfb5cc59a2552040c4ae98d998 Mon Sep 17 00:00:00 2001 From: Jim Quinlan <james.quinlan(a)broadcom.com> Date: Fri, 3 Oct 2025 13:04:36 -0400 Subject: [PATCH] PCI: brcmstb: Fix disabling L0s capability caab002d5069 ("PCI: brcmstb: Disable L0s component of ASPM if requested") set PCI_EXP_LNKCAP_ASPM_L1 and (optionally) PCI_EXP_LNKCAP_ASPM_L0S in PCI_EXP_LNKCAP (aka PCIE_RC_CFG_PRIV1_LINK_CAPABILITY in brcmstb). But instead of using PCI_EXP_LNKCAP_ASPM_L1 and PCI_EXP_LNKCAP_ASPM_L0S directly, it used PCIE_LINK_STATE_L1 and PCIE_LINK_STATE_L0S, which are Linux-created values that only coincidentally matched the PCIe spec. b478e162f227 ("PCI/ASPM: Consolidate link state defines") later changed them so they no longer matched the PCIe spec, so the bits ended up in the wrong place in PCI_EXP_LNKCAP. Use PCI_EXP_LNKCAP_ASPM_L0S to clear L0s support when there's an 'aspm-no-l0s' property. Rely on brcmstb hardware to advertise L0s and/or L1 support otherwise. Fixes: caab002d5069 ("PCI: brcmstb: Disable L0s component of ASPM if requested") Reported-by: Bjorn Helgaas <bhelgaas(a)google.com> Closes: https://lore.kernel.org/linux-pci/20250925194424.GA2197200@bhelgaas Signed-off-by: Jim Quinlan <james.quinlan(a)broadcom.com> [mani: reworded subject and description, added closes tag and CCed stable] Signed-off-by: Manivannan Sadhasivam <mani(a)kernel.org> [bhelgaas: commit log] Signed-off-by: Bjorn Helgaas <bhelgaas(a)google.com> Reviewed-by: Florian Fainelli <florian.fainelli(a)broadcom.com> Cc: stable(a)vger.kernel.org Link: https://patch.msgid.link/20251003170436.1446030-1-james.quinlan@broadcom.com diff --git a/drivers/pci/controller/pcie-brcmstb.c b/drivers/pci/controller/pcie-brcmstb.c index 9afbd02ded35..7e9b2f6a604a 100644 --- a/drivers/pci/controller/pcie-brcmstb.c +++ b/drivers/pci/controller/pcie-brcmstb.c @@ -48,7 +48,6 @@ #define PCIE_RC_CFG_PRIV1_LINK_CAPABILITY 0x04dc #define PCIE_RC_CFG_PRIV1_LINK_CAPABILITY_MAX_LINK_WIDTH_MASK 0x1f0 -#define PCIE_RC_CFG_PRIV1_LINK_CAPABILITY_ASPM_SUPPORT_MASK 0xc00 #define PCIE_RC_CFG_PRIV1_ROOT_CAP 0x4f8 #define PCIE_RC_CFG_PRIV1_ROOT_CAP_L1SS_MODE_MASK 0xf8 @@ -1075,7 +1074,7 @@ static int brcm_pcie_setup(struct brcm_pcie *pcie) void __iomem *base = pcie->base; struct pci_host_bridge *bridge; struct resource_entry *entry; - u32 tmp, burst, aspm_support, num_lanes, num_lanes_cap; + u32 tmp, burst, num_lanes, num_lanes_cap; u8 num_out_wins = 0; int num_inbound_wins = 0; int memc, ret; @@ -1175,12 +1174,9 @@ static int brcm_pcie_setup(struct brcm_pcie *pcie) /* Don't advertise L0s capability if 'aspm-no-l0s' */ - aspm_support = PCIE_LINK_STATE_L1; - if (!of_property_read_bool(pcie->np, "aspm-no-l0s")) - aspm_support |= PCIE_LINK_STATE_L0S; tmp = readl(base + PCIE_RC_CFG_PRIV1_LINK_CAPABILITY); - u32p_replace_bits(&tmp, aspm_support, - PCIE_RC_CFG_PRIV1_LINK_CAPABILITY_ASPM_SUPPORT_MASK); + if (of_property_read_bool(pcie->np, "aspm-no-l0s")) + tmp &= ~PCI_EXP_LNKCAP_ASPM_L0S; writel(tmp, base + PCIE_RC_CFG_PRIV1_LINK_CAPABILITY); /* 'tmp' still holds the contents of PRIV1_LINK_CAPABILITY */

3 days, 2 hours

FAILED: patch "[PATCH] gve: defer interrupt enabling until NAPI registration" failed to apply to 6.12-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.12-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.12.y git checkout FETCH_HEAD git cherry-pick -x 3d970eda003441f66551a91fda16478ac0711617 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2026010559-clock-gore-94e2@gregkh' --subject-prefix 'PATCH 6.12.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 3d970eda003441f66551a91fda16478ac0711617 Mon Sep 17 00:00:00 2001 From: Ankit Garg <nktgrg(a)google.com> Date: Fri, 19 Dec 2025 10:29:45 +0000 Subject: [PATCH] gve: defer interrupt enabling until NAPI registration Currently, interrupts are automatically enabled immediately upon request. This allows interrupt to fire before the associated NAPI context is fully initialized and cause failures like below: [ 0.946369] Call Trace: [ 0.946369] <IRQ> [ 0.946369] __napi_poll+0x2a/0x1e0 [ 0.946369] net_rx_action+0x2f9/0x3f0 [ 0.946369] handle_softirqs+0xd6/0x2c0 [ 0.946369] ? handle_edge_irq+0xc1/0x1b0 [ 0.946369] __irq_exit_rcu+0xc3/0xe0 [ 0.946369] common_interrupt+0x81/0xa0 [ 0.946369] </IRQ> [ 0.946369] <TASK> [ 0.946369] asm_common_interrupt+0x22/0x40 [ 0.946369] RIP: 0010:pv_native_safe_halt+0xb/0x10 Use the `IRQF_NO_AUTOEN` flag when requesting interrupts to prevent auto enablement and explicitly enable the interrupt in NAPI initialization path (and disable it during NAPI teardown). This ensures that interrupt lifecycle is strictly coupled with readiness of NAPI context. Cc: stable(a)vger.kernel.org Fixes: 1dfc2e46117e ("gve: Refactor napi add and remove functions") Signed-off-by: Ankit Garg <nktgrg(a)google.com> Reviewed-by: Jordan Rhee <jordanrhee(a)google.com> Reviewed-by: Joshua Washington <joshwash(a)google.com> Signed-off-by: Harshitha Ramamurthy <hramamurthy(a)google.com> Link: https://patch.msgid.link/20251219102945.2193617-1-hramamurthy@google.com Signed-off-by: Paolo Abeni <pabeni(a)redhat.com> diff --git a/drivers/net/ethernet/google/gve/gve_main.c b/drivers/net/ethernet/google/gve/gve_main.c index a7a088a77f37..7eb64e1e4d85 100644 --- a/drivers/net/ethernet/google/gve/gve_main.c +++ b/drivers/net/ethernet/google/gve/gve_main.c @@ -558,7 +558,7 @@ static int gve_alloc_notify_blocks(struct gve_priv *priv) block->priv = priv; err = request_irq(priv->msix_vectors[msix_idx].vector, gve_is_gqi(priv) ? gve_intr : gve_intr_dqo, - 0, block->name, block); + IRQF_NO_AUTOEN, block->name, block); if (err) { dev_err(&priv->pdev->dev, "Failed to receive msix vector %d\n", i); diff --git a/drivers/net/ethernet/google/gve/gve_utils.c b/drivers/net/ethernet/google/gve/gve_utils.c index ace9b8698021..b53b7fcdcdaf 100644 --- a/drivers/net/ethernet/google/gve/gve_utils.c +++ b/drivers/net/ethernet/google/gve/gve_utils.c @@ -112,11 +112,13 @@ void gve_add_napi(struct gve_priv *priv, int ntfy_idx, netif_napi_add_locked(priv->dev, &block->napi, gve_poll); netif_napi_set_irq_locked(&block->napi, block->irq); + enable_irq(block->irq); } void gve_remove_napi(struct gve_priv *priv, int ntfy_idx) { struct gve_notify_block *block = &priv->ntfy_blocks[ntfy_idx]; + disable_irq(block->irq); netif_napi_del_locked(&block->napi); }

3 days, 2 hours

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