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vgic_lpi_stress sends MAPTI and MAPC commands during guest GIC setup to map interrupt events to ITT entries and collection IDs to redistributors, respectively. We have no guarantee that the ITS will finish handling these mapping commands before the selftest calls KVM_SIGNAL_MSI to inject LPIs to the guest. If LPIs are injected before ITS mapping completes, the ITS cannot properly pass the interrupt on to the redistributor. Fix by adding a SYNC command to the selftests ITS library, then calling SYNC after ITS mapping to ensure mapping completes before signal_lpi() writes to GITS_TRANSLATER. Signed-off-by: Maximilian Dittgen <mdittgen@amazon.de> Link: https://msgid.link/20251119135744.68552-2-mdittgen@amazon.de Signed-off-by: Oliver Upton <oupton@kernel.org>
21 lines
746 B
C
21 lines
746 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __SELFTESTS_GIC_V3_ITS_H__
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#define __SELFTESTS_GIC_V3_ITS_H__
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#include <linux/sizes.h>
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void its_init(vm_paddr_t coll_tbl, size_t coll_tbl_sz,
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vm_paddr_t device_tbl, size_t device_tbl_sz,
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vm_paddr_t cmdq, size_t cmdq_size);
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void its_send_mapd_cmd(void *cmdq_base, u32 device_id, vm_paddr_t itt_base,
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size_t itt_size, bool valid);
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void its_send_mapc_cmd(void *cmdq_base, u32 vcpu_id, u32 collection_id, bool valid);
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void its_send_mapti_cmd(void *cmdq_base, u32 device_id, u32 event_id,
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u32 collection_id, u32 intid);
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void its_send_invall_cmd(void *cmdq_base, u32 collection_id);
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void its_send_sync_cmd(void *cmdq_base, u32 vcpu_id);
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#endif // __SELFTESTS_GIC_V3_ITS_H__
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