linux-kernel - Re: [PATCH] acpi, apei, arm64: APEI initial support for aarch64.

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Date:	Fri, 14 Aug 2015 11:27:31 -0700
From:	"Zhang, Jonathan Zhixiong" <zjzhang@...eaurora.org>
To:	Fu Wei <fu.wei@...aro.org>,
	Linaro ACPI Mailman List <linaro-acpi@...ts.linaro.org>,
	linux-kernel@...r.kernel.org,
	"matt.fleming" <matt.fleming@...el.com>
Cc:	Wei Fu <tekkamanninja@...il.com>,
	G Gregory <graeme.gregory@...aro.org>,
	Al Stone <al.stone@...aro.org>,
	Hanjun Guo <hanjun.guo@...aro.org>,
	Jon Masters <jcm@...hat.com>,
	Mark Rutland <mark.rutland@....com>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will.deacon@....com>,
	Rafael Wysocki <rjw@...ysocki.net>, bp <bp@...en8.de>,
	Tomasz Nowicki <tomasz.nowicki@...aro.org>
Subject: Re: [PATCH] acpi, apei, arm64: APEI initial support for aarch64.


On 8/14/2015 5:39 AM, Fu Wei wrote:
> Hi all,
>
> This patch depends on https://lkml.org/lkml/2015/8/8/169
> [PATCH V11 4/5] arm64: apei: implement arch_apei_get_mem_attributes(),
> which has been in the "next" branch of
> git://git.kernel.org/pub/scm/linux/kernel/git/mfleming/efi.git
>
> FYI
> Thanks
>
> On 14 August 2015 at 20:35,  <fu.wei@...aro.org> wrote:
>> From: Tomasz Nowicki <tomasz.nowicki@...aro.org>
>>
>> This commit provides APEI arch-specific bits for aarch64
>>
>> Changelog:
>>    Fu Wei:
>>      Move arch_apei_flush_tlb_one() to arch/arm64/include/asm/apci.h.
>>      Delete arch/arm64/kernel/apei.c.
>>      Add "#ifdef CONFIG_ACPI_APEI" for "acpi_disable_cmcff".
>>
>> Signed-off-by: Tomasz Nowicki <tomasz.nowicki@...aro.org>
>> Signed-off-by: Fu Wei <fu.wei@...aro.org>
>> ---
>>   arch/arm64/Kconfig            |  1 +
>>   arch/arm64/include/asm/acpi.h | 11 +++++++++++
>>   arch/arm64/kernel/acpi.c      |  4 ++++
>>   3 files changed, 16 insertions(+)
>>
>> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
>> index 318175f..6144c9d 100644
>> --- a/arch/arm64/Kconfig
>> +++ b/arch/arm64/Kconfig
>> @@ -3,6 +3,7 @@ config ARM64
>>          select ACPI_CCA_REQUIRED if ACPI
>>          select ACPI_GENERIC_GSI if ACPI
>>          select ACPI_REDUCED_HARDWARE_ONLY if ACPI
>> +       select HAVE_ACPI_APEI if ACPI
>>          select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
>>          select ARCH_HAS_ELF_RANDOMIZE
>>          select ARCH_HAS_GCOV_PROFILE_ALL
>> diff --git a/arch/arm64/include/asm/acpi.h b/arch/arm64/include/asm/acpi.h
>> index a17b623..ced6e25 100644
>> --- a/arch/arm64/include/asm/acpi.h
>> +++ b/arch/arm64/include/asm/acpi.h
>> @@ -22,6 +22,7 @@
>>   #ifdef CONFIG_ACPI_APEI
>>   #include <linux/efi.h>
>>   #include <asm/pgtable.h>
>> +#include <asm/tlbflush.h>
>>   #endif
>>
>>   /* Macros for consistency checks of the GICC subtable of MADT */
>> @@ -52,6 +53,9 @@ typedef u64 phys_cpuid_t;
>>   extern int acpi_disabled;
>>   extern int acpi_noirq;
>>   extern int acpi_pci_disabled;
>> +#ifdef CONFIG_ACPI_APEI
>> +extern int acpi_disable_cmcff;
>> +#endif
>>
>>   static inline void disable_acpi(void)
>>   {
>> @@ -89,6 +93,13 @@ static inline bool acpi_has_cpu_in_madt(void)
>>   static inline void arch_fix_phys_package_id(int num, u32 slot) { }
>>   void __init acpi_init_cpus(void);
>>
>> +#ifdef CONFIG_ACPI_APEI
>> +static inline void arch_apei_flush_tlb_one(unsigned long addr)
>> +{
>> +       flush_tlb_kernel_range(addr, addr + PAGE_SIZE);
>> +}
>> +#endif
>> +
>>   #else
>>   static inline void acpi_init_cpus(void) { }
>>   #endif /* CONFIG_ACPI */
>> diff --git a/arch/arm64/kernel/acpi.c b/arch/arm64/kernel/acpi.c
>> index 19de753..bd1be9a 100644
>> --- a/arch/arm64/kernel/acpi.c
>> +++ b/arch/arm64/kernel/acpi.c
>> @@ -36,6 +36,10 @@ EXPORT_SYMBOL(acpi_disabled);
>>   int acpi_pci_disabled = 1;     /* skip ACPI PCI scan and IRQ initialization */
>>   EXPORT_SYMBOL(acpi_pci_disabled);
>>
>> +#ifdef CONFIG_ACPI_APEI
>> +int acpi_disable_cmcff;
>> +#endif
>> +
>>   static bool param_acpi_off __initdata;
>>   static bool param_acpi_force __initdata;
>>
>> --
>> 1.9.1
>>
>
>
>
I tested this patch on an arm64 platform, the APEI functionalities
work as expected.
   Tested-by: Jonathan (Zhixiong) Zhang <zjzhang@...eaurora.org>

-- 
Jonathan (Zhixiong) Zhang
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
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