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KVM: selftests: Add helper for enabling LPIs on a redistributor

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The selftests GIC library presently does not support LPIs. Add a
userspace helper for configuring a redistributor for LPIs, installing
an LPI configuration table and LPI pending table.

Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Link: https://lore.kernel.org/r/20240422200158.2606761-18-oliver.upton@linux.dev
Signed-off-by: Marc Zyngier <maz@kernel.org>
This commit is contained in:
Oliver Upton 2024-04-22 20:01:56 +00:00 committed by Marc Zyngier
parent be26db61e8
commit 03e560ab53
3 changed files with 29 additions and 0 deletions
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3
tools/testing/selftests/kvm/include/aarch64/gic.h
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@ -58,4 +58,7 @@ void gic_irq_clear_pending(unsigned int intid);
bool gic_irq_get_pending(unsigned int intid);
void gic_irq_set_config(unsigned int intid, bool is_edge);
void gic_rdist_enable_lpis(vm_paddr_t cfg_table, size_t cfg_table_size,
vm_paddr_t pend_table);
#endif /* SELFTEST_KVM_GIC_H */

24
tools/testing/selftests/kvm/lib/aarch64/gic_v3.c
View File

@ -401,3 +401,27 @@ const struct gic_common_ops gicv3_ops = {
.gic_irq_get_pending = gicv3_irq_get_pending,
.gic_irq_set_config = gicv3_irq_set_config,
};
void gic_rdist_enable_lpis(vm_paddr_t cfg_table, size_t cfg_table_size,
vm_paddr_t pend_table)
{
volatile void *rdist_base = gicr_base_cpu(guest_get_vcpuid());
u32 ctlr;
u64 val;
val = (cfg_table |
GICR_PROPBASER_InnerShareable |
GICR_PROPBASER_RaWaWb |
((ilog2(cfg_table_size) - 1) & GICR_PROPBASER_IDBITS_MASK));
writeq_relaxed(val, rdist_base + GICR_PROPBASER);
val = (pend_table |
GICR_PENDBASER_InnerShareable |
GICR_PENDBASER_RaWaWb);
writeq_relaxed(val, rdist_base + GICR_PENDBASER);
ctlr = readl_relaxed(rdist_base + GICR_CTLR);
ctlr |= GICR_CTLR_ENABLE_LPIS;
writel_relaxed(ctlr, rdist_base + GICR_CTLR);
}

2
tools/testing/selftests/kvm/lib/aarch64/vgic.c
View File

@ -3,8 +3,10 @@
* ARM Generic Interrupt Controller (GIC) v3 host support
*/
#include <linux/kernel.h>
#include <linux/kvm.h>
#include <linux/sizes.h>
#include <asm/cputype.h>
#include <asm/kvm_para.h>
#include <asm/kvm.h>