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arch/x86: All dynamic IRQ connection need to be remapped

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Allocate an IRTE for all irq being connected through
arch_irq_connect_dynamic(). This will be mandatory since VT-D expects to
filter all interruptions (but the one it generates, as we will see
later).

Taking into account CONFIG_INTEL_VTD_ICTL_XAPIC_PASSTHROUGH, which could
help for debugging.

Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
This commit is contained in:
Tomasz Bursztyka 2021-01-06 10:51:02 +01:00 • committed by Anas Nashif
commit 84319db9fe
1 changed files with 32 additions and 0 deletions
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32
arch/x86/core/intel64/irq.c
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@ -29,6 +29,27 @@ unsigned char _irq_to_interrupt_vector[CONFIG_MAX_IRQ_LINES];
void (*x86_irq_funcs[NR_IRQ_VECTORS])(const void *); void (*x86_irq_funcs[NR_IRQ_VECTORS])(const void *);
const void *x86_irq_args[NR_IRQ_VECTORS]; const void *x86_irq_args[NR_IRQ_VECTORS];
#if defined(CONFIG_INTEL_VTD_ICTL)
#include <device.h>
#include <drivers/interrupt_controller/intel_vtd.h>
static const struct device *vtd;
static bool get_vtd(void)
{
if (vtd != NULL) {
return true;
}
#define DT_DRV_COMPAT intel_vt_d
vtd = device_get_binding(DT_INST_LABEL(0));
#undef DT_DRV_COMPAT
return vtd == NULL ? false : true;
}
#endif /* CONFIG_INTEL_VTD_ICTL */
static void irq_spurious(const void *arg) static void irq_spurious(const void *arg)
{ {
LOG_ERR("Spurious interrupt, vector %d\n", (uint32_t)(uint64_t)arg); LOG_ERR("Spurious interrupt, vector %d\n", (uint32_t)(uint64_t)arg);
@ -109,6 +130,17 @@ int arch_irq_connect_dynamic(unsigned int irq, unsigned int priority,
vector = z_x86_allocate_vector(priority, -1); vector = z_x86_allocate_vector(priority, -1);
if (vector >= 0) { if (vector >= 0) {
#if defined(CONFIG_INTEL_VTD_ICTL)
if (get_vtd()) {
int irte = vtd_allocate_entries(vtd, 1);
__ASSERT(irte >= 0, "IRTE allocation must succeed");
vtd_set_irte_vector(vtd, irte, vector);
vtd_set_irte_irq(vtd, irte, irq);
}
#endif /* CONFIG_INTEL_VTD_ICTL */
z_irq_controller_irq_config(vector, irq, flags); z_irq_controller_irq_config(vector, irq, flags);
z_x86_irq_connect_on_vector(irq, vector, func, arg); z_x86_irq_connect_on_vector(irq, vector, func, arg);
} }