mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-25 18:30:06 +00:00
irqchip/gic-v3: Handle pseudo-NMIs
Provide a higher priority to be used for pseudo-NMIs. When such an interrupt is received, keep interrupts fully disabled at CPU level to prevent receiving other pseudo-NMIs while handling the current one. Signed-off-by: Julien Thierry <julien.thierry@arm.com> Acked-by: Marc Zyngier <marc.zyngier@arm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
parent
d98d0a990c
commit
f32c926651
1 changed files with 36 additions and 6 deletions
|
@ -41,6 +41,8 @@
|
|||
|
||||
#include "irq-gic-common.h"
|
||||
|
||||
#define GICD_INT_NMI_PRI (GICD_INT_DEF_PRI & ~0x80)
|
||||
|
||||
#define FLAGS_WORKAROUND_GICR_WAKER_MSM8996 (1ULL << 0)
|
||||
|
||||
struct redist_region {
|
||||
|
@ -381,12 +383,45 @@ static u64 gic_mpidr_to_affinity(unsigned long mpidr)
|
|||
return aff;
|
||||
}
|
||||
|
||||
static void gic_deactivate_unhandled(u32 irqnr)
|
||||
{
|
||||
if (static_branch_likely(&supports_deactivate_key)) {
|
||||
if (irqnr < 8192)
|
||||
gic_write_dir(irqnr);
|
||||
} else {
|
||||
gic_write_eoir(irqnr);
|
||||
}
|
||||
}
|
||||
|
||||
static inline void gic_handle_nmi(u32 irqnr, struct pt_regs *regs)
|
||||
{
|
||||
int err;
|
||||
|
||||
if (static_branch_likely(&supports_deactivate_key))
|
||||
gic_write_eoir(irqnr);
|
||||
/*
|
||||
* Leave the PSR.I bit set to prevent other NMIs to be
|
||||
* received while handling this one.
|
||||
* PSR.I will be restored when we ERET to the
|
||||
* interrupted context.
|
||||
*/
|
||||
err = handle_domain_nmi(gic_data.domain, irqnr, regs);
|
||||
if (err)
|
||||
gic_deactivate_unhandled(irqnr);
|
||||
}
|
||||
|
||||
static asmlinkage void __exception_irq_entry gic_handle_irq(struct pt_regs *regs)
|
||||
{
|
||||
u32 irqnr;
|
||||
|
||||
irqnr = gic_read_iar();
|
||||
|
||||
if (gic_supports_nmi() &&
|
||||
unlikely(gic_read_rpr() == GICD_INT_NMI_PRI)) {
|
||||
gic_handle_nmi(irqnr, regs);
|
||||
return;
|
||||
}
|
||||
|
||||
if (gic_prio_masking_enabled()) {
|
||||
gic_pmr_mask_irqs();
|
||||
gic_arch_enable_irqs();
|
||||
|
@ -403,12 +438,7 @@ static asmlinkage void __exception_irq_entry gic_handle_irq(struct pt_regs *regs
|
|||
err = handle_domain_irq(gic_data.domain, irqnr, regs);
|
||||
if (err) {
|
||||
WARN_ONCE(true, "Unexpected interrupt received!\n");
|
||||
if (static_branch_likely(&supports_deactivate_key)) {
|
||||
if (irqnr < 8192)
|
||||
gic_write_dir(irqnr);
|
||||
} else {
|
||||
gic_write_eoir(irqnr);
|
||||
}
|
||||
gic_deactivate_unhandled(irqnr);
|
||||
}
|
||||
return;
|
||||
}
|
||||
|
|
Loading…
Reference in a new issue