[Deepin-Kernel-SIG] [linux-6.6.y] [deepin] workaround 920 desktop cpufreq #409
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| @@ -269,6 +269,20 @@ pgprot_t __acpi_get_mem_attribute(phys_addr_t addr) | |||
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| void __iomem *acpi_os_ioremap(acpi_physical_address phys, acpi_size size) | |||
| { | |||
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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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| @@ -681,7 +681,7 @@ int acpi_cppc_processor_probe(struct acpi_processor *pr) | |||
| acpi_status status; | |||
| 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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| @@ -269,6 +269,20 @@ pgprot_t __acpi_get_mem_attribute(phys_addr_t addr) | |||
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| void __iomem *acpi_os_ioremap(acpi_physical_address phys, acpi_size size) | |||
| { | |||
| #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?)
| @@ -681,7 +681,11 @@ int acpi_cppc_processor_probe(struct acpi_processor *pr) | |||
| acpi_status status; | |||
| 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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workaround由于BIOS bug 导致 桌面版本 鲲鹏920 不能使能cppc-cpufreq的问题。