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KVM: selftests: aarch64: Cmdline arg to set EOI mode in vgic_irq

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Add a new cmdline arg to set the EOI mode for all vgic_irq tests.  This
specifies whether a write to EOIR will deactivate IRQs or not.

Signed-off-by: Ricardo Koller <ricarkol@google.com>
Acked-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20211109023906.1091208-10-ricarkol@google.com
This commit is contained in:
Ricardo Koller 2021-11-08 18:38:58 -08:00 committed by Marc Zyngier
parent e5410ee280
commit 8a35b2877d
1 changed files with 50 additions and 8 deletions
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58
tools/testing/selftests/kvm/aarch64/vgic_irq.c
View File

@ -29,6 +29,7 @@
*/
struct test_args {
uint32_t nr_irqs; /* number of KVM supported IRQs. */
bool eoi_split; /* 1 is eoir+dir, 0 is eoir only */
};
/*
@ -112,7 +113,7 @@ static uint64_t gic_read_ap1r0(void)
return reg;
}
static void guest_irq_handler(struct ex_regs *regs)
static void guest_irq_generic_handler(bool eoi_split)
{
uint32_t intid = gic_get_and_ack_irq();
@ -129,6 +130,8 @@ static void guest_irq_handler(struct ex_regs *regs)
gic_set_eoi(intid);
GUEST_ASSERT_EQ(gic_read_ap1r0(), 0);
if (eoi_split)
gic_set_dir(intid);
GUEST_ASSERT(!gic_irq_get_active(intid));
GUEST_ASSERT(!gic_irq_get_pending(intid));
@ -151,6 +154,24 @@ do { \
GUEST_ASSERT(_intid == 0 || _intid == IAR_SPURIOUS); \
} while (0)
#define CAT_HELPER(a, b) a ## b
#define CAT(a, b) CAT_HELPER(a, b)
#define PREFIX guest_irq_handler_
#define GUEST_IRQ_HANDLER_NAME(split) CAT(PREFIX, split)
#define GENERATE_GUEST_IRQ_HANDLER(split) \
static void CAT(PREFIX, split)(struct ex_regs *regs) \
{ \
guest_irq_generic_handler(split); \
}
GENERATE_GUEST_IRQ_HANDLER(0);
GENERATE_GUEST_IRQ_HANDLER(1);
static void (*guest_irq_handlers[2])(struct ex_regs *) = {
GUEST_IRQ_HANDLER_NAME(0),
GUEST_IRQ_HANDLER_NAME(1),
};
static void reset_priorities(struct test_args *args)
{
int i;
@ -220,6 +241,8 @@ static void guest_code(struct test_args args)
for (i = 0; i < nr_irqs; i++)
gic_irq_enable(i);
gic_set_eoi_split(args.eoi_split);
reset_priorities(&args);
gic_set_priority_mask(CPU_PRIO_MASK);
@ -268,10 +291,11 @@ static void kvm_inject_get_call(struct kvm_vm *vm, struct ucall *uc,
static void print_args(struct test_args *args)
{
printf("nr-irqs=%d\n", args->nr_irqs);
printf("nr-irqs=%d eoi-split=%d\n",
args->nr_irqs, args->eoi_split);
}
static void test_vgic(uint32_t nr_irqs)
static void test_vgic(uint32_t nr_irqs, bool eoi_split)
{
struct ucall uc;
int gic_fd;
@ -280,6 +304,7 @@ static void test_vgic(uint32_t nr_irqs)
struct test_args args = {
.nr_irqs = nr_irqs,
.eoi_split = eoi_split,
};
print_args(&args);
@ -297,7 +322,7 @@ static void test_vgic(uint32_t nr_irqs)
GICD_BASE_GPA, GICR_BASE_GPA);
vm_install_exception_handler(vm, VECTOR_IRQ_CURRENT,
guest_irq_handler);
guest_irq_handlers[args.eoi_split]);
while (1) {
vcpu_run(vm, VCPU_ID);
@ -328,8 +353,11 @@ static void help(const char *name)
{
printf(
"\n"
"usage: %s [-n num_irqs]\n", name);
printf(" -n: specify the number of IRQs to configure the vgic with.\n");
"usage: %s [-n num_irqs] [-e eoi_split]\n", name);
printf(" -n: specify the number of IRQs to configure the vgic with. "
"It has to be a multiple of 32 and between 64 and 1024.\n");
printf(" -e: if 1 then EOI is split into a write to DIR on top "
"of writing EOI.\n");
puts("");
exit(1);
}
@ -337,18 +365,24 @@ static void help(const char *name)
int main(int argc, char **argv)
{
uint32_t nr_irqs = 64;
bool default_args = true;
int opt;
bool eoi_split = false;
/* Tell stdout not to buffer its content */
setbuf(stdout, NULL);
while ((opt = getopt(argc, argv, "hg:n:")) != -1) {
while ((opt = getopt(argc, argv, "hn:e:")) != -1) {
switch (opt) {
case 'n':
nr_irqs = atoi(optarg);
if (nr_irqs > 1024 || nr_irqs % 32)
help(argv[0]);
break;
case 'e':
eoi_split = (bool)atoi(optarg);
default_args = false;
break;
case 'h':
default:
help(argv[0]);
@ -356,7 +390,15 @@ int main(int argc, char **argv)
}
}
test_vgic(nr_irqs);
/* If the user just specified nr_irqs and/or gic_version, then run all
* combinations.
*/
if (default_args) {
test_vgic(nr_irqs, false /* eoi_split */);
test_vgic(nr_irqs, true /* eoi_split */);
} else {
test_vgic(nr_irqs, eoi_split);
}
return 0;
}