* [PATCH][RFC] ACPI: processor: Print more information when acpi_processor_evaluate_cst() failed
@ 2020-08-16 15:12 Chen Yu
2020-08-18 10:46 ` Rafael J. Wysocki
0 siblings, 1 reply; 3+ messages in thread
From: Chen Yu @ 2020-08-16 15:12 UTC (permalink / raw)
To: Rafael J. Wysocki, Len Brown; +Cc: linux-acpi, rui.zhang, linux-kernel, Chen Yu
Some platforms have bogus _CST which might cause expectd behavior
in the cpu idle driver. Some bogus _CST might be unable to be
disassembled by acpica-tools due to broken format.
Print extra log if the _CST extraction/verification failed.
This can be used to help the user narrow down why the cpu
idle driver fails to behave as expected.
Suggested-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Chen Yu <yu.c.chen@intel.com>
---
drivers/acpi/acpi_processor.c | 34 ++++++++++++++++++++++++++++------
1 file changed, 28 insertions(+), 6 deletions(-)
diff --git a/drivers/acpi/acpi_processor.c b/drivers/acpi/acpi_processor.c
index b51ddf3bb616..c1d34c448edb 100644
--- a/drivers/acpi/acpi_processor.c
+++ b/drivers/acpi/acpi_processor.c
@@ -798,22 +798,34 @@ int acpi_processor_evaluate_cst(acpi_handle handle, u32 cpu,
memset(&cx, 0, sizeof(cx));
element = &cst->package.elements[i];
- if (element->type != ACPI_TYPE_PACKAGE)
+ if (element->type != ACPI_TYPE_PACKAGE) {
+ acpi_handle_warn(handle, "_CST C%d type(%x) is not package, skip...\n",
+ i, element->type);
continue;
+ }
- if (element->package.count != 4)
+ if (element->package.count != 4) {
+ acpi_handle_warn(handle, "_CST C%d package count(%d) is not 4, skip...\n",
+ i, element->package.count);
continue;
+ }
obj = &element->package.elements[0];
- if (obj->type != ACPI_TYPE_BUFFER)
+ if (obj->type != ACPI_TYPE_BUFFER) {
+ acpi_handle_warn(handle, "_CST C%d package element[0] type(%x) is not buffer, skip...\n",
+ i, obj->type);
continue;
+ }
reg = (struct acpi_power_register *)obj->buffer.pointer;
obj = &element->package.elements[1];
- if (obj->type != ACPI_TYPE_INTEGER)
+ if (obj->type != ACPI_TYPE_INTEGER) {
+ acpi_handle_warn(handle, "_CST C[%d] package element[1] type(%x) is not integer, skip...\n",
+ i, obj->type);
continue;
+ }
cx.type = obj->integer.value;
/*
@@ -850,6 +862,8 @@ int acpi_processor_evaluate_cst(acpi_handle handle, u32 cpu,
cx.entry_method = ACPI_CSTATE_HALT;
snprintf(cx.desc, ACPI_CX_DESC_LEN, "ACPI HLT");
} else {
+ acpi_handle_warn(handle, "_CST C%d declares FIXED_HARDWARE C-state but not supported in hardware, skip...\n",
+ i);
continue;
}
} else if (reg->space_id == ACPI_ADR_SPACE_SYSTEM_IO) {
@@ -857,6 +871,8 @@ int acpi_processor_evaluate_cst(acpi_handle handle, u32 cpu,
snprintf(cx.desc, ACPI_CX_DESC_LEN, "ACPI IOPORT 0x%x",
cx.address);
} else {
+ acpi_handle_warn(handle, "_CST C%d space_id(%x) neither FIXED_HARDWARE nor SYSTEM_IO, skip...\n",
+ i, reg->space_id);
continue;
}
@@ -864,14 +880,20 @@ int acpi_processor_evaluate_cst(acpi_handle handle, u32 cpu,
cx.valid = 1;
obj = &element->package.elements[2];
- if (obj->type != ACPI_TYPE_INTEGER)
+ if (obj->type != ACPI_TYPE_INTEGER) {
+ acpi_handle_warn(handle, "_CST C%d package element[2] type(%x) not integer, skip...\n",
+ i, obj->type);
continue;
+ }
cx.latency = obj->integer.value;
obj = &element->package.elements[3];
- if (obj->type != ACPI_TYPE_INTEGER)
+ if (obj->type != ACPI_TYPE_INTEGER) {
+ acpi_handle_warn(handle, "_CST C%d package element[3] type(%x) not integer, skip...\n",
+ i, obj->type);
continue;
+ }
memcpy(&info->states[++last_index], &cx, sizeof(cx));
}
--
2.17.1
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [PATCH][RFC] ACPI: processor: Print more information when acpi_processor_evaluate_cst() failed
2020-08-16 15:12 [PATCH][RFC] ACPI: processor: Print more information when acpi_processor_evaluate_cst() failed Chen Yu
@ 2020-08-18 10:46 ` Rafael J. Wysocki
2020-08-19 2:48 ` Chen Yu
0 siblings, 1 reply; 3+ messages in thread
From: Rafael J. Wysocki @ 2020-08-18 10:46 UTC (permalink / raw)
To: Chen Yu
Cc: Rafael J. Wysocki, Len Brown, ACPI Devel Maling List, Zhang, Rui,
Linux Kernel Mailing List
On Sun, Aug 16, 2020 at 5:12 PM Chen Yu <yu.c.chen@intel.com> wrote:
>
> Some platforms have bogus _CST which might cause expectd behavior
> in the cpu idle driver. Some bogus _CST might be unable to be
> disassembled by acpica-tools due to broken format.
> Print extra log if the _CST extraction/verification failed.
> This can be used to help the user narrow down why the cpu
> idle driver fails to behave as expected.
>
> Suggested-by: Zhang Rui <rui.zhang@intel.com>
> Signed-off-by: Chen Yu <yu.c.chen@intel.com>
This is fine by me as a general idea, but please change the log level to "info".
> ---
> drivers/acpi/acpi_processor.c | 34 ++++++++++++++++++++++++++++------
> 1 file changed, 28 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/acpi/acpi_processor.c b/drivers/acpi/acpi_processor.c
> index b51ddf3bb616..c1d34c448edb 100644
> --- a/drivers/acpi/acpi_processor.c
> +++ b/drivers/acpi/acpi_processor.c
> @@ -798,22 +798,34 @@ int acpi_processor_evaluate_cst(acpi_handle handle, u32 cpu,
> memset(&cx, 0, sizeof(cx));
>
> element = &cst->package.elements[i];
> - if (element->type != ACPI_TYPE_PACKAGE)
> + if (element->type != ACPI_TYPE_PACKAGE) {
> + acpi_handle_warn(handle, "_CST C%d type(%x) is not package, skip...\n",
> + i, element->type);
> continue;
> + }
>
> - if (element->package.count != 4)
> + if (element->package.count != 4) {
> + acpi_handle_warn(handle, "_CST C%d package count(%d) is not 4, skip...\n",
> + i, element->package.count);
> continue;
> + }
>
> obj = &element->package.elements[0];
>
> - if (obj->type != ACPI_TYPE_BUFFER)
> + if (obj->type != ACPI_TYPE_BUFFER) {
> + acpi_handle_warn(handle, "_CST C%d package element[0] type(%x) is not buffer, skip...\n",
> + i, obj->type);
> continue;
> + }
>
> reg = (struct acpi_power_register *)obj->buffer.pointer;
>
> obj = &element->package.elements[1];
> - if (obj->type != ACPI_TYPE_INTEGER)
> + if (obj->type != ACPI_TYPE_INTEGER) {
> + acpi_handle_warn(handle, "_CST C[%d] package element[1] type(%x) is not integer, skip...\n",
> + i, obj->type);
> continue;
> + }
>
> cx.type = obj->integer.value;
> /*
> @@ -850,6 +862,8 @@ int acpi_processor_evaluate_cst(acpi_handle handle, u32 cpu,
> cx.entry_method = ACPI_CSTATE_HALT;
> snprintf(cx.desc, ACPI_CX_DESC_LEN, "ACPI HLT");
> } else {
> + acpi_handle_warn(handle, "_CST C%d declares FIXED_HARDWARE C-state but not supported in hardware, skip...\n",
> + i);
> continue;
> }
> } else if (reg->space_id == ACPI_ADR_SPACE_SYSTEM_IO) {
> @@ -857,6 +871,8 @@ int acpi_processor_evaluate_cst(acpi_handle handle, u32 cpu,
> snprintf(cx.desc, ACPI_CX_DESC_LEN, "ACPI IOPORT 0x%x",
> cx.address);
> } else {
> + acpi_handle_warn(handle, "_CST C%d space_id(%x) neither FIXED_HARDWARE nor SYSTEM_IO, skip...\n",
> + i, reg->space_id);
> continue;
> }
>
> @@ -864,14 +880,20 @@ int acpi_processor_evaluate_cst(acpi_handle handle, u32 cpu,
> cx.valid = 1;
>
> obj = &element->package.elements[2];
> - if (obj->type != ACPI_TYPE_INTEGER)
> + if (obj->type != ACPI_TYPE_INTEGER) {
> + acpi_handle_warn(handle, "_CST C%d package element[2] type(%x) not integer, skip...\n",
> + i, obj->type);
> continue;
> + }
>
> cx.latency = obj->integer.value;
>
> obj = &element->package.elements[3];
> - if (obj->type != ACPI_TYPE_INTEGER)
> + if (obj->type != ACPI_TYPE_INTEGER) {
> + acpi_handle_warn(handle, "_CST C%d package element[3] type(%x) not integer, skip...\n",
> + i, obj->type);
> continue;
> + }
>
> memcpy(&info->states[++last_index], &cx, sizeof(cx));
> }
> --
> 2.17.1
>
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [PATCH][RFC] ACPI: processor: Print more information when acpi_processor_evaluate_cst() failed
2020-08-18 10:46 ` Rafael J. Wysocki
@ 2020-08-19 2:48 ` Chen Yu
0 siblings, 0 replies; 3+ messages in thread
From: Chen Yu @ 2020-08-19 2:48 UTC (permalink / raw)
To: Rafael J. Wysocki
Cc: Rafael J. Wysocki, Len Brown, ACPI Devel Maling List, Zhang, Rui,
Linux Kernel Mailing List
On Tue, Aug 18, 2020 at 12:46:12PM +0200, Rafael J. Wysocki wrote:
> On Sun, Aug 16, 2020 at 5:12 PM Chen Yu <yu.c.chen@intel.com> wrote:
> >
> > Some platforms have bogus _CST which might cause expectd behavior
> > in the cpu idle driver. Some bogus _CST might be unable to be
> > disassembled by acpica-tools due to broken format.
> > Print extra log if the _CST extraction/verification failed.
> > This can be used to help the user narrow down why the cpu
> > idle driver fails to behave as expected.
> >
> > Suggested-by: Zhang Rui <rui.zhang@intel.com>
> > Signed-off-by: Chen Yu <yu.c.chen@intel.com>
>
> This is fine by me as a general idea, but please change the log level to "info".
>
Okay, I will send a new version. Thanks!
thanks,
Chenyu
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2020-08-19 2:47 UTC | newest]
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2020-08-16 15:12 [PATCH][RFC] ACPI: processor: Print more information when acpi_processor_evaluate_cst() failed Chen Yu
2020-08-18 10:46 ` Rafael J. Wysocki
2020-08-19 2:48 ` Chen Yu
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