Re: [PATCH] irqchip/gic-v3: Fix GICD_CTLR_ARE_NS bit field
Hi Marc, On 03/07/2017 01:11 PM, Marc Zyngier wrote: On Tue, Mar 07 2017 at 4:07:05 am GMT, Alim Akhtar wrote: From: Alim Akhtar As per GICv3 Architecture specification 8.9.4 field descriptions, GICD_CTLR_ARE_NS is bit[5]. This patch correct the same. Fixes: 021f6537 ("irqchip: gic-v3: Initial support for GICv3") Cc: sta...@vger.kernel.org Signed-off-by: Alim Akhtar --- include/linux/irqchip/arm-gic-v3.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/linux/irqchip/arm-gic-v3.h b/include/linux/irqchip/arm-gic-v3.h index e808f8a..4aaf639 100644 --- a/include/linux/irqchip/arm-gic-v3.h +++ b/include/linux/irqchip/arm-gic-v3.h @@ -57,7 +57,7 @@ #define GICD_CTLR_RWP (1U << 31) #define GICD_CTLR_DS (1U << 6) -#define GICD_CTLR_ARE_NS (1U << 4) +#define GICD_CTLR_ARE_NS (1U << 5) #define GICD_CTLR_ENABLE_G1A (1U << 1) #define GICD_CTLR_ENABLE_G1(1U << 0) No, the issue is much more subtle. - When the access is secure in a system that supports two security states, this is bit[5] indeed. - When the access is non-secure in a system that supports two security states, this is bit[4] (so that software written for a single security mode can run on both side of the security fence). - In a system that only supports a single security state, this is bit[4] too. Given that Linux is only designed to run on the non-secure side (at least when paired with GICv3), I stand by my original bit layout. Ok, got it, thanks for clarification. Thanks, M.
Re: [PATCH] irqchip/gic-v3: Fix GICD_CTLR_ARE_NS bit field
On Tue, Mar 07 2017 at 4:07:05 am GMT, Alim Akhtar wrote: > From: Alim Akhtar > > As per GICv3 Architecture specification 8.9.4 field descriptions, > GICD_CTLR_ARE_NS is bit[5]. This patch correct the same. > > Fixes: 021f6537 ("irqchip: gic-v3: Initial support for GICv3") > Cc: sta...@vger.kernel.org > Signed-off-by: Alim Akhtar > --- > include/linux/irqchip/arm-gic-v3.h | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/include/linux/irqchip/arm-gic-v3.h > b/include/linux/irqchip/arm-gic-v3.h > index e808f8a..4aaf639 100644 > --- a/include/linux/irqchip/arm-gic-v3.h > +++ b/include/linux/irqchip/arm-gic-v3.h > @@ -57,7 +57,7 @@ > > #define GICD_CTLR_RWP(1U << 31) > #define GICD_CTLR_DS (1U << 6) > -#define GICD_CTLR_ARE_NS (1U << 4) > +#define GICD_CTLR_ARE_NS (1U << 5) > #define GICD_CTLR_ENABLE_G1A (1U << 1) > #define GICD_CTLR_ENABLE_G1 (1U << 0) No, the issue is much more subtle. - When the access is secure in a system that supports two security states, this is bit[5] indeed. - When the access is non-secure in a system that supports two security states, this is bit[4] (so that software written for a single security mode can run on both side of the security fence). - In a system that only supports a single security state, this is bit[4] too. Given that Linux is only designed to run on the non-secure side (at least when paired with GICv3), I stand by my original bit layout. Thanks, M. -- Jazz is not dead, it just smell funny.
[PATCH] irqchip/gic-v3: Fix GICD_CTLR_ARE_NS bit field
From: Alim Akhtar As per GICv3 Architecture specification 8.9.4 field descriptions, GICD_CTLR_ARE_NS is bit[5]. This patch correct the same. Fixes: 021f6537 ("irqchip: gic-v3: Initial support for GICv3") Cc: sta...@vger.kernel.org Signed-off-by: Alim Akhtar --- include/linux/irqchip/arm-gic-v3.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/linux/irqchip/arm-gic-v3.h b/include/linux/irqchip/arm-gic-v3.h index e808f8a..4aaf639 100644 --- a/include/linux/irqchip/arm-gic-v3.h +++ b/include/linux/irqchip/arm-gic-v3.h @@ -57,7 +57,7 @@ #define GICD_CTLR_RWP (1U << 31) #define GICD_CTLR_DS (1U << 6) -#define GICD_CTLR_ARE_NS (1U << 4) +#define GICD_CTLR_ARE_NS (1U << 5) #define GICD_CTLR_ENABLE_G1A (1U << 1) #define GICD_CTLR_ENABLE_G1(1U << 0) -- 2.7.4