linux-kernel - Re: [PATCH v2 02/26] arm64: convert handle_IRQ to use __handle_domain

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 26 Aug 2014 17:58:47 +0100
From:	Marc Zyngier <marc.zyngier@....com>
To:	Catalin Marinas <catalin.marinas@....com>
CC:	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-omap@...r.kernel.org" <linux-omap@...r.kernel.org>,
	"linux@...nrisc.net" <linux@...nrisc.net>,
	"linux@....linux.org.uk" <linux@....linux.org.uk>,
	"shawn.guo@...escale.com" <shawn.guo@...escale.com>,
	"kernel@...gutronix.de" <kernel@...gutronix.de>,
	"tony@...mide.com" <tony@...mide.com>,
	Will Deacon <Will.Deacon@....com>,
	"jonas@...thpole.se" <jonas@...thpole.se>,
	"tglx@...utronix.de" <tglx@...utronix.de>,
	"jason@...edaemon.net" <jason@...edaemon.net>,
	"shc_work@...l.ru" <shc_work@...l.ru>,
	"baohua@...nel.org" <baohua@...nel.org>,
	"maxime.ripard@...e-electrons.com" <maxime.ripard@...e-electrons.com>,
	"khilman@...aro.org" <khilman@...aro.org>,
	"sboyd@...eaurora.org" <sboyd@...eaurora.org>,
	Lorenzo Pieralisi <Lorenzo.Pieralisi@....com>,
	"larry.bassel@...aro.org" <larry.bassel@...aro.org>,
	Mark Rutland <Mark.Rutland@....com>,
	Sudeep Holla <Sudeep.Holla@....com>,
	"stefan.kristiansson@...nalahti.fi" 
	<stefan.kristiansson@...nalahti.fi>,
	"vkale@....com" <vkale@....com>,
	"schwidefsky@...ibm.com" <schwidefsky@...ibm.com>
Subject: Re: [PATCH v2 02/26] arm64: convert handle_IRQ to use __handle_domain_irq

On 26/08/14 17:51, Catalin Marinas wrote:
> On Tue, Aug 26, 2014 at 11:03:17AM +0100, Marc Zyngier wrote:
>> In order to limit code duplication, convert the architecture specific
>> handle_IRQ to use the generic __handle_domain_irq function.
>>
>> Signed-off-by: Marc Zyngier <marc.zyngier@....com>
>> ---
>>  arch/arm64/Kconfig      |  1 +
>>  arch/arm64/kernel/irq.c | 18 +-----------------
>>  2 files changed, 2 insertions(+), 17 deletions(-)
>>
>> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
>> index fd4e81a..1f16ed9 100644
>> --- a/arch/arm64/Kconfig
>> +++ b/arch/arm64/Kconfig
>> @@ -30,6 +30,7 @@ config ARM64
>>  	select GENERIC_STRNCPY_FROM_USER
>>  	select GENERIC_STRNLEN_USER
>>  	select GENERIC_TIME_VSYSCALL
>> +	select HANDLE_DOMAIN_IRQ
>>  	select HARDIRQS_SW_RESEND
>>  	select HAVE_ARCH_AUDITSYSCALL
>>  	select HAVE_ARCH_JUMP_LABEL
>> diff --git a/arch/arm64/kernel/irq.c b/arch/arm64/kernel/irq.c
>> index 0f08dfd..2c0e2a7 100644
>> --- a/arch/arm64/kernel/irq.c
>> +++ b/arch/arm64/kernel/irq.c
>> @@ -48,23 +48,7 @@ int arch_show_interrupts(struct seq_file *p, int prec)
>>   */
>>  void handle_IRQ(unsigned int irq, struct pt_regs *regs)
>>  {
>> -	struct pt_regs *old_regs = set_irq_regs(regs);
>> -
>> -	irq_enter();
>> -
>> -	/*
>> -	 * Some hardware gives randomly wrong interrupts.  Rather
>> -	 * than crashing, do something sensible.
>> -	 */
>> -	if (unlikely(irq >= nr_irqs)) {
>> -		pr_warn_ratelimited("Bad IRQ%u\n", irq);
>> -		ack_bad_irq(irq);
>> -	} else {
>> -		generic_handle_irq(irq);
>> -	}
>> -
>> -	irq_exit();
>> -	set_irq_regs(old_regs);
>> +	__handle_domain_irq(NULL, irq, false, regs);
>>  }
> 
> The only thing that's missing is a pr_warn_ratelimited(). Do we still
> need it? We could add it to ack_bad_irq() though.

Indeed, we could move the warning to ack_bad_irq(), which is always
architecture specific. I'll add that to the next version of the series.

> Either way:
> 
> Acked-by: Catalin Marinas <catalin.marinas@....com>
> 

Thanks,

	M.
-- 
Jazz is not dead. It just smells funny...
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/