The branch main has been updated by kib: URL: https://cgit.FreeBSD.org/src/commit/?id=99e3d96fc1a2b1d5cac5a635608ec3044ec4fa13
commit 99e3d96fc1a2b1d5cac5a635608ec3044ec4fa13 Author: Konstantin Belousov <[email protected]> AuthorDate: 2024-09-05 00:33:34 +0000 Commit: Konstantin Belousov <[email protected]> CommitDate: 2024-09-05 01:30:29 +0000 x86: always provide dummy x86_iommu virtual methods to make configurations where vendor-specific IOMMU not yet implemented but IOMMU is enabled in config, work when calling into MSI/IOAPIC interrupt remapping. Reported by: cy Sponsored by: Advanced Micro Devices (AMD) Sponsored by: The FreeBSD Foundation MFC after: 1 week --- sys/x86/iommu/iommu_utils.c | 52 +++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 50 insertions(+), 2 deletions(-) diff --git a/sys/x86/iommu/iommu_utils.c b/sys/x86/iommu/iommu_utils.c index 2c647fd21c67..2011c632f770 100644 --- a/sys/x86/iommu/iommu_utils.c +++ b/sys/x86/iommu/iommu_utils.c @@ -190,12 +190,60 @@ SYSCTL_INT(_hw_iommu, OID_AUTO, batch_coalesce, CTLFLAG_RWTUN, &iommu_qi_batch_coalesce, 0, "Number of qi batches between interrupt"); -static struct x86_iommu *x86_iommu; +static struct iommu_unit * +x86_no_iommu_find(device_t dev, bool verbose) +{ + return (NULL); +} + +static int +x86_no_iommu_alloc_msi_intr(device_t src, u_int *cookies, u_int count) +{ + return (EOPNOTSUPP); +} + +static int +x86_no_iommu_map_msi_intr(device_t src, u_int cpu, u_int vector, + u_int cookie, uint64_t *addr, uint32_t *data) +{ + return (EOPNOTSUPP); +} + +static int +x86_no_iommu_unmap_msi_intr(device_t src, u_int cookie) +{ + return (0); +} + +static int +x86_no_iommu_map_ioapic_intr(u_int ioapic_id, u_int cpu, u_int vector, + bool edge, bool activehi, int irq, u_int *cookie, uint32_t *hi, + uint32_t *lo) +{ + return (EOPNOTSUPP); +} + +static int +x86_no_iommu_unmap_ioapic_intr(u_int ioapic_id, u_int *cookie) +{ + return (0); +} + +static struct x86_iommu x86_no_iommu = { + .find = x86_no_iommu_find, + .alloc_msi_intr = x86_no_iommu_alloc_msi_intr, + .map_msi_intr = x86_no_iommu_map_msi_intr, + .unmap_msi_intr = x86_no_iommu_unmap_msi_intr, + .map_ioapic_intr = x86_no_iommu_map_ioapic_intr, + .unmap_ioapic_intr = x86_no_iommu_unmap_ioapic_intr, +}; + +static struct x86_iommu *x86_iommu = &x86_no_iommu; void set_x86_iommu(struct x86_iommu *x) { - MPASS(x86_iommu == NULL); + MPASS(x86_iommu == &x86_no_iommu); x86_iommu = x; }
