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| author | Marc Zyngier <marc.zyngier@arm.com> | 2016-05-06 19:41:56 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-06-01 12:16:58 -0700 |
| commit | f0bbf31d63b86845500f8e2a6fcbe6e35f630636 (patch) | |
| tree | d90693d754357cba4f6a5f1fcffe0f5dfa8b9aed /drivers | |
| parent | 066b085d819dd8a1decba6119a7a068e9e5add86 (diff) | |
| download | linux-stable-f0bbf31d63b86845500f8e2a6fcbe6e35f630636.tar.gz linux-stable-f0bbf31d63b86845500f8e2a6fcbe6e35f630636.tar.bz2 linux-stable-f0bbf31d63b86845500f8e2a6fcbe6e35f630636.zip | |
irqchip/gic-v3: Configure all interrupts as non-secure Group-1
commit 7c9b973061b03af62734f613f6abec46c0dd4a88 upstream.
The GICv3 driver wrongly assumes that it runs on the non-secure
side of a secure-enabled system, while it could be on a system
with a single security state, or a GICv3 with GICD_CTLR.DS set.
Either way, it is important to configure this properly, or
interrupts will simply not be delivered on this HW.
Reported-by: Peter Maydell <peter.maydell@linaro.org>
Tested-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/irqchip/irq-gic-v3.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c index e35ab799be12..2fc499a2207e 100644 --- a/drivers/irqchip/irq-gic-v3.c +++ b/drivers/irqchip/irq-gic-v3.c @@ -387,6 +387,15 @@ static void __init gic_dist_init(void) writel_relaxed(0, base + GICD_CTLR); gic_dist_wait_for_rwp(); + /* + * Configure SPIs as non-secure Group-1. This will only matter + * if the GIC only has a single security state. This will not + * do the right thing if the kernel is running in secure mode, + * but that's not the intended use case anyway. + */ + for (i = 32; i < gic_data.irq_nr; i += 32) + writel_relaxed(~0, base + GICD_IGROUPR + i / 8); + gic_dist_config(base, gic_data.irq_nr, gic_dist_wait_for_rwp); /* Enable distributor with ARE, Group1 */ @@ -501,6 +510,9 @@ static void gic_cpu_init(void) rbase = gic_data_rdist_sgi_base(); + /* Configure SGIs/PPIs as non-secure Group-1 */ + writel_relaxed(~0, rbase + GICR_IGROUPR0); + gic_cpu_config(rbase, gic_redist_wait_for_rwp); /* Give LPIs a spin */ |