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Re: [Qemu-devel] [PATCH] arm_gicv3: Fix broken logic in ELRSR calculatio
From: |
Thomas Huth |
Subject: |
Re: [Qemu-devel] [PATCH] arm_gicv3: Fix broken logic in ELRSR calculation |
Date: |
Thu, 26 Jan 2017 10:43:26 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.6.0 |
On 24.01.2017 12:06, Peter Maydell wrote:
> Fix a broken expression in the calculation of ELRSR
> register bits: instead of "(lr & ICH_LR_EL2_HW) == 1"
> we want to check for != 0, because the HW bit is not
> bit 0 so a test for == 1 is always false.
>
> Fixes: https://bugs.launchpad.net/bugs/1658506
>
> Signed-off-by: Peter Maydell <address@hidden>
> ---
> hw/intc/arm_gicv3_cpuif.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/hw/intc/arm_gicv3_cpuif.c b/hw/intc/arm_gicv3_cpuif.c
> index a9ee7fd..c25ee03 100644
> --- a/hw/intc/arm_gicv3_cpuif.c
> +++ b/hw/intc/arm_gicv3_cpuif.c
> @@ -2430,7 +2430,7 @@ static uint64_t ich_elrsr_read(CPUARMState *env, const
> ARMCPRegInfo *ri)
> uint64_t lr = cs->ich_lr_el2[i];
>
> if ((lr & ICH_LR_EL2_STATE_MASK) == 0 &&
> - ((lr & ICH_LR_EL2_HW) == 1 || (lr & ICH_LR_EL2_EOI) == 0)) {
> + ((lr & ICH_LR_EL2_HW) != 0 || (lr & ICH_LR_EL2_EOI) == 0)) {
> value |= (1 << i);
> }
> }
>
Reviewed-by: Thomas Huth <address@hidden>