[Deepin-Kernel-SIG] [linux-6.6.y] [deepin] workaround 920 desktop cpufreq #409
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| if (read_cpuid_implementor() == ARM_CPU_IMP_HISI) { | ||
| /* For normal memory we already have a cacheable mapping. */ |
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| int ret = -ENODATA; | ||
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| if (!osc_sb_cppc2_support_acked) { | ||
| if (read_cpuid_implementor() != ARM_CPU_IMP_HISI && !osc_sb_cppc2_support_acked) { |
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…cess kernel memory If we have a buggy bios,and we have no bios update for it, we cannot access the _OSC map, so the CPPC cpufreq driver will not probed in some case. example: Kunpeng 920 8 core Desktop Board Log: ACPI CPPC: Failed to ioremap PCC comm region mem for 0 ACPI CPPC: Failed to find PCC channel for subspace 0 ACPI CPPC: Failed to find PCC channel for subspace 0 ACPI CPPC: Failed to find PCC channel for subspace 0 ACPI CPPC: Failed to find PCC channel for subspace 0 ACPI CPPC: Failed to find PCC channel for subspace 0 ACPI CPPC: Failed to find PCC channel for subspace 0 ACPI CPPC: Failed to find PCC channel for subspace 0 Link:https://gitee.com/openeuler/kernel/issues/I39AN0 Signed-off-by: Wentao Guan <guanwentao@uniontech.com>
If we have a buggy bios,and we have no bios update for it, we cannot acked CPPCv2. so the CPPC cpufreq driver will not probed in some case. example: Kunpeng 920 8 core Desktop Board Test result: cpu freq can from 200Mhz to 2.6Ghz. Log: cppc_acpi:acpi_cppc_processor_probe: ACPI CPPC: CPPC v2 _OSC not acked cppc_acpi:acpi_cppc_processor_probe: ACPI CPPC: CPPC v2 _OSC not acked cppc_acpi:acpi_cppc_processor_probe: ACPI CPPC: CPPC v2 _OSC not acked cppc_acpi:acpi_cppc_processor_probe: ACPI CPPC: CPPC v2 _OSC not acked cppc_acpi:acpi_cppc_processor_probe: ACPI CPPC: CPPC v2 _OSC not acked cppc_acpi:acpi_cppc_processor_probe: ACPI CPPC: CPPC v2 _OSC not acked cppc_acpi:acpi_cppc_processor_probe: ACPI CPPC: CPPC v2 _OSC not acked cppc_acpi:acpi_cppc_processor_probe: ACPI CPPC: CPPC v2 _OSC not acked
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| { | ||
| #ifdef CONFIG_ARM64 | ||
| if (read_cpuid_implementor() == ARM_CPU_IMP_HISI) { | ||
| /* For normal memory we already have a cacheable mapping. */ |
There was a problem hiding this comment.
WARNING: Prefer a maximum 75 chars per line (possible unwrapped commit description?)
| int ret = -ENODATA; | ||
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||
| #ifdef CONFIG_ARM64 | ||
| if (read_cpuid_implementor() != ARM_CPU_IMP_HISI && !osc_sb_cppc2_support_acked) { |
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WARNING: Prefer a maximum 75 chars per line (possible unwrapped commit description?)
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opsiff
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to opsiff/UOS-kernel
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Dec 29, 2025
…cess kernel memory If we have a buggy bios,and we have no bios update for it, we cannot access the _OSC map, so the CPPC cpufreq driver will not probed in some case. example: Kunpeng 920 8 core Desktop Board Log: ACPI CPPC: Failed to ioremap PCC comm region mem for 0 ACPI CPPC: Failed to find PCC channel for subspace 0 ACPI CPPC: Failed to find PCC channel for subspace 0 ACPI CPPC: Failed to find PCC channel for subspace 0 ACPI CPPC: Failed to find PCC channel for subspace 0 ACPI CPPC: Failed to find PCC channel for subspace 0 ACPI CPPC: Failed to find PCC channel for subspace 0 ACPI CPPC: Failed to find PCC channel for subspace 0 Link: https://gitee.com/openeuler/kernel/issues/I39AN0 Signed-off-by: Wentao Guan <guanwentao@uniontech.com> Link: deepin-community#409 (cherry picked from commit 534de05) Signed-off-by: Wentao Guan <guanwentao@uniontech.com>
opsiff
added a commit
to opsiff/UOS-kernel
that referenced
this pull request
Dec 29, 2025
If we have a buggy bios,and we have no bios update for it, we cannot acked CPPCv2. so the CPPC cpufreq driver will not probed in some case. example: Kunpeng 920 8 core Desktop Board Test result: cpu freq can from 200Mhz to 2.6Ghz. Log: cppc_acpi:acpi_cppc_processor_probe: ACPI CPPC: CPPC v2 _OSC not acked cppc_acpi:acpi_cppc_processor_probe: ACPI CPPC: CPPC v2 _OSC not acked cppc_acpi:acpi_cppc_processor_probe: ACPI CPPC: CPPC v2 _OSC not acked cppc_acpi:acpi_cppc_processor_probe: ACPI CPPC: CPPC v2 _OSC not acked cppc_acpi:acpi_cppc_processor_probe: ACPI CPPC: CPPC v2 _OSC not acked cppc_acpi:acpi_cppc_processor_probe: ACPI CPPC: CPPC v2 _OSC not acked cppc_acpi:acpi_cppc_processor_probe: ACPI CPPC: CPPC v2 _OSC not acked cppc_acpi:acpi_cppc_processor_probe: ACPI CPPC: CPPC v2 _OSC not acked Link: deepin-community#409 (cherry picked from commit 816c5ec) Signed-off-by: Wentao Guan <guanwentao@uniontech.com>
opsiff
added a commit
to opsiff/UOS-kernel
that referenced
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Dec 29, 2025
…cess kernel memory If we have a buggy bios,and we have no bios update for it, we cannot access the _OSC map, so the CPPC cpufreq driver will not probed in some case. example: Kunpeng 920 8 core Desktop Board Log: ACPI CPPC: Failed to ioremap PCC comm region mem for 0 ACPI CPPC: Failed to find PCC channel for subspace 0 ACPI CPPC: Failed to find PCC channel for subspace 0 ACPI CPPC: Failed to find PCC channel for subspace 0 ACPI CPPC: Failed to find PCC channel for subspace 0 ACPI CPPC: Failed to find PCC channel for subspace 0 ACPI CPPC: Failed to find PCC channel for subspace 0 ACPI CPPC: Failed to find PCC channel for subspace 0 Link: https://gitee.com/openeuler/kernel/issues/I39AN0 Signed-off-by: Wentao Guan <guanwentao@uniontech.com> Link: deepin-community#409 (cherry picked from commit 534de05) Signed-off-by: Wentao Guan <guanwentao@uniontech.com>
opsiff
added a commit
to opsiff/UOS-kernel
that referenced
this pull request
Dec 29, 2025
If we have a buggy bios,and we have no bios update for it, we cannot acked CPPCv2. so the CPPC cpufreq driver will not probed in some case. example: Kunpeng 920 8 core Desktop Board Test result: cpu freq can from 200Mhz to 2.6Ghz. Log: cppc_acpi:acpi_cppc_processor_probe: ACPI CPPC: CPPC v2 _OSC not acked cppc_acpi:acpi_cppc_processor_probe: ACPI CPPC: CPPC v2 _OSC not acked cppc_acpi:acpi_cppc_processor_probe: ACPI CPPC: CPPC v2 _OSC not acked cppc_acpi:acpi_cppc_processor_probe: ACPI CPPC: CPPC v2 _OSC not acked cppc_acpi:acpi_cppc_processor_probe: ACPI CPPC: CPPC v2 _OSC not acked cppc_acpi:acpi_cppc_processor_probe: ACPI CPPC: CPPC v2 _OSC not acked cppc_acpi:acpi_cppc_processor_probe: ACPI CPPC: CPPC v2 _OSC not acked cppc_acpi:acpi_cppc_processor_probe: ACPI CPPC: CPPC v2 _OSC not acked Link: deepin-community#409 (cherry picked from commit 816c5ec) Signed-off-by: Wentao Guan <guanwentao@uniontech.com>
lanlanxiyiji
pushed a commit
that referenced
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Jan 4, 2026
…cess kernel memory If we have a buggy bios,and we have no bios update for it, we cannot access the _OSC map, so the CPPC cpufreq driver will not probed in some case. example: Kunpeng 920 8 core Desktop Board Log: ACPI CPPC: Failed to ioremap PCC comm region mem for 0 ACPI CPPC: Failed to find PCC channel for subspace 0 ACPI CPPC: Failed to find PCC channel for subspace 0 ACPI CPPC: Failed to find PCC channel for subspace 0 ACPI CPPC: Failed to find PCC channel for subspace 0 ACPI CPPC: Failed to find PCC channel for subspace 0 ACPI CPPC: Failed to find PCC channel for subspace 0 ACPI CPPC: Failed to find PCC channel for subspace 0 Link: https://gitee.com/openeuler/kernel/issues/I39AN0 Signed-off-by: Wentao Guan <guanwentao@uniontech.com> Link: #409 (cherry picked from commit 534de05) Signed-off-by: Wentao Guan <guanwentao@uniontech.com>
lanlanxiyiji
pushed a commit
that referenced
this pull request
Jan 4, 2026
If we have a buggy bios,and we have no bios update for it, we cannot acked CPPCv2. so the CPPC cpufreq driver will not probed in some case. example: Kunpeng 920 8 core Desktop Board Test result: cpu freq can from 200Mhz to 2.6Ghz. Log: cppc_acpi:acpi_cppc_processor_probe: ACPI CPPC: CPPC v2 _OSC not acked cppc_acpi:acpi_cppc_processor_probe: ACPI CPPC: CPPC v2 _OSC not acked cppc_acpi:acpi_cppc_processor_probe: ACPI CPPC: CPPC v2 _OSC not acked cppc_acpi:acpi_cppc_processor_probe: ACPI CPPC: CPPC v2 _OSC not acked cppc_acpi:acpi_cppc_processor_probe: ACPI CPPC: CPPC v2 _OSC not acked cppc_acpi:acpi_cppc_processor_probe: ACPI CPPC: CPPC v2 _OSC not acked cppc_acpi:acpi_cppc_processor_probe: ACPI CPPC: CPPC v2 _OSC not acked cppc_acpi:acpi_cppc_processor_probe: ACPI CPPC: CPPC v2 _OSC not acked Link: #409 (cherry picked from commit 816c5ec) Signed-off-by: Wentao Guan <guanwentao@uniontech.com>
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workaround由于BIOS bug 导致 桌面版本 鲲鹏920 不能使能cppc-cpufreq的问题。