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net: ipa: explicitly disallow inter-EE interrupts

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It is possible for other execution environments (EEs, like the modem)
to request changes to local (AP) channel or event ring state.  We do
not support this feature.

In gsi_irq_setup(), explicitly zero the mask that defines which
channels are permitted to generate inter-EE channel state change
interrupts.  Do the same for the event ring mask.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Alex Elder 2020-11-05 12:14:05 -06:00 committed by Jakub Kicinski
parent 06c8632833
commit 46f748ccaf
1 changed files with 2 additions and 2 deletions
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4
drivers/net/ipa/gsi.c
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@ -259,6 +259,8 @@ static void gsi_irq_setup(struct gsi *gsi)
iowrite32(0, gsi->virt + GSI_CNTXT_SRC_EV_CH_IRQ_MSK_OFFSET);
iowrite32(0, gsi->virt + GSI_CNTXT_GLOB_IRQ_EN_OFFSET);
iowrite32(0, gsi->virt + GSI_CNTXT_SRC_IEOB_IRQ_MSK_OFFSET);
iowrite32(0, gsi->virt + GSI_INTER_EE_SRC_CH_IRQ_OFFSET);
iowrite32(0, gsi->virt + GSI_INTER_EE_SRC_EV_CH_IRQ_OFFSET);
}
/* Turn off all GSI interrupts when we're all done */
@ -307,8 +309,6 @@ static void gsi_irq_enable(struct gsi *gsi)
iowrite32(ERROR_INT_FMASK, gsi->virt + GSI_CNTXT_GLOB_IRQ_EN_OFFSET);
gsi->type_enabled_bitmap |= BIT(GSI_GLOB_EE);
/* We don't use inter-EE channel or event interrupts */
/* Never enable GSI_BREAK_POINT */
val = GSI_CNTXT_GSI_IRQ_ALL & ~BREAK_POINT_FMASK;
iowrite32(val, gsi->virt + GSI_CNTXT_GSI_IRQ_EN_OFFSET);