Re: [kvm-unit-tests PATCH] arm64: microbench: fix unexpected PPI

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Fri, Dec 18, 2020 at 03:15:42PM +0800, Jingyi Wang wrote:
> For the origin value of CNTV_CVAL_EL0 architecturally UNKNOWN, we may
> receive an unexpected PPI before we actual trigger the timer interrupt.
> So we should set ARCH_TIMER_CTL_IMASK in timer_prep.
> 
> Signed-off-by: Jingyi Wang <wangjingyi11@xxxxxxxxxx>
> ---
>  arm/micro-bench.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arm/micro-bench.c b/arm/micro-bench.c
> index 362f93e..95c418c 100644
> --- a/arm/micro-bench.c
> +++ b/arm/micro-bench.c
> @@ -227,7 +227,7 @@ static bool timer_prep(void)
>  	}
>  
>  	writel(1 << PPI(TIMER_VTIMER_IRQ), gic_isenabler);
> -	write_sysreg(ARCH_TIMER_CTL_ENABLE, cntv_ctl_el0);
> +	write_sysreg(ARCH_TIMER_CTL_IMASK | ARCH_TIMER_CTL_ENABLE, cntv_ctl_el0);
>  	isb();
>  
>  	gic_prep_common();
> -- 
> 2.19.1
>

Queued, https://gitlab.com/rhdrjones/kvm-unit-tests/commits/arm/queue

Thanks,
drew 

_______________________________________________
kvmarm mailing list
kvmarm@xxxxxxxxxxxxxxxxxxxxx
https://lists.cs.columbia.edu/mailman/listinfo/kvmarm



[Index of Archives]     [Linux KVM]     [Spice Development]     [Libvirt]     [Libvirt Users]     [Linux USB Devel]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux