linux-kernel - Re: [PATCH v2] acpi, apei, arm64: APEI initial support for aarch64.

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Message-ID: <20151202170257.GB20520@red-moon>
Date:	Wed, 2 Dec 2015 17:02:57 +0000
From:	Lorenzo Pieralisi <lorenzo.pieralisi@....com>
To:	fu.wei@...aro.org
Cc:	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linaro-acpi@...ts.linaro.org, jon.zhixiong.zhang@...il.com,
	tomasz.nowicki@...aro.org, tn@...ihalf.com,
	graeme.gregory@...aro.org, al.stone@...aro.org,
	hanjun.guo@...aro.org, jcm@...hat.com, mark.rutland@....com,
	catalin.marinas@....com, will.deacon@....com, msalter@...hat.com,
	Marc.Zyngier@....com, grant.likely@...aro.org, rrichter@...ium.com,
	ruigrok.richard@...il.com, harba@....qualcomm.com
Subject: Re: [PATCH v2] acpi, apei, arm64: APEI initial support for aarch64.

On Wed, Dec 02, 2015 at 10:59:05PM +0800, fu.wei@...aro.org wrote:

[...]

> +#ifdef CONFIG_ACPI_APEI
> +extern int acpi_disable_cmcff;
> +#endif
>  
>  static inline void disable_acpi(void)
>  {
> @@ -94,6 +97,7 @@ static inline const char *acpi_get_enable_method(int cpu)
>  
>  #ifdef	CONFIG_ACPI_APEI
>  pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr);
> +void arch_apei_flush_tlb_one(unsigned long addr);
>  #endif
>  
>  #endif /*_ASM_ACPI_H*/
> diff --git a/arch/arm64/kernel/acpi.c b/arch/arm64/kernel/acpi.c
> index d1ce8e2..811fea2 100644
> --- a/arch/arm64/kernel/acpi.c
> +++ b/arch/arm64/kernel/acpi.c
> @@ -32,6 +32,7 @@
>  #ifdef CONFIG_ACPI_APEI
>  # include <linux/efi.h>
>  # include <asm/pgtable.h>
> +# include <asm/tlbflush.h>
>  #endif
>  
>  int acpi_noirq = 1;		/* skip ACPI IRQ initialization */
> @@ -41,6 +42,10 @@ 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

There must be a reason why we keep all these arch agnostic ACPI flags
in arch specific code, is there ?

Lorenzo

> +
>  static bool param_acpi_off __initdata;
>  static bool param_acpi_force __initdata;
>  
> @@ -233,4 +238,9 @@ pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr)
>  		return __pgprot(PROT_NORMAL_NC);
>  	return __pgprot(PROT_DEVICE_nGnRnE);
>  }
> +
> +void arch_apei_flush_tlb_one(unsigned long addr)
> +{
> +	flush_tlb_kernel_range(addr, addr + PAGE_SIZE);
> +}
>  #endif
> -- 
> 2.5.0
> 
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