Re: [Xen-devel] [PATCH v13 0/4] add per-domain IOMMU control

[Oleksandr <olekstysh@xxxxxxxxx>]

[CC Julien]


Hi Paul

I may mistake, but looks like

80ff3d338dc93260b41ffeeebb0f852c2edef9ce iommu: tidy up 
iommu_use_hap_pt() and need_iommu_pt_sync() macros
triggers ASSERT_UNREACHABLE on Arm if no IOMMU has been found (I built 
with my platform's IOMMU driver disabled: # CONFIG_IPMMU_VMSA is not set) .
So, iommu_setup() calls clear_iommu_hap_pt_share() with 
iommu_hap_pt_share being set (CONFIG_IOMMU_FORCE_PT_SHARE=y) which, 
actually, triggers ASSERT.
...


(XEN) Assertion 'unreachable' failed at 
...ild-workspace/build/xen/xen/include/xen/iommu.h:72
(XEN) ----[ Xen-4.13-unstable  arm64  debug=y   Not tainted ]----
(XEN) CPU:    0
(XEN) PC:     00000000002b3ae0 iommu_setup+0xa0/0x18c
(XEN) LR:     00000000002b3a8c
(XEN) SP:     00000000002f7dc0
(XEN) CPSR:   a0000249 MODE:64-bit EL2h (Hypervisor, handler)
(XEN)      X0: 00000000002a7000  X1: 0000000000000000  X2: 2c736173656e6572
(XEN)      X3: 0000000000000002  X4: 0000000000000001  X5: 0000000000000000
(XEN)      X6: 0000000000000080  X7: 2b726072646d6471  X8: 7f7f7f7f7f7f7f7f
(XEN)      X9: ff65685e6c6f7275 X10: 7f7f7f7f7f7f7f7f X11: 0101010101010101
(XEN)     X12: 0000000000000038 X13: 0000000000280910 X14: 0000000000000020
(XEN)     X15: 0000000000000000 X16: 00000000002a7000 X17: 00000000002a7000
(XEN)     X18: 00000000002a7000 X19: 0000000000000000 X20: 00000000ffffffed
(XEN)     X21: 00000000002a6380 X22: 0000000000335430 X23: 0000000000000002
(XEN)     X24: 000000000029b1f0 X25: 00000000002d83d0 X26: 0000000048000000
(XEN)     X27: 00000000c0000000 X28: 0000000000000001  FP: 00000000002f7dc0
(XEN)
(XEN)   VTCR_EL2: 80000000
(XEN)  VTTBR_EL2: 0000000000000000
(XEN)
(XEN)  SCTLR_EL2: 30cd183d
(XEN)    HCR_EL2: 0000000000000038
(XEN)  TTBR0_EL2: 00000000781b4000
(XEN)
(XEN)    ESR_EL2: f2000001
(XEN)  HPFAR_EL2: 0000000000000000
(XEN)    FAR_EL2: 0000000000000000
(XEN)
(XEN) Xen stack trace from sp=00000000002f7dc0:
(XEN)    00000000002f7de0 00000000002bdd94 0000000000000002 0000000000000002
(XEN)    00000000bfe0b660 00000000002001b4 0000000078080000 0000000077e80000
(XEN)    0000000048000000 0000000000000000 0000000000400000 0000000000000003
(XEN)    0000000000000001 0000000000000000 0000000078080000 0000000048080040
(XEN)    0000000000000000 000000000000f080 0000000048000000 0000000078000000
(XEN)    00000000002d83c0 00000000002aa440 0000000000000000 0000000000000000
(XEN)    0000000000000000 0000000300000000 0000000000000000 00000040ffffffff
(XEN)    0000000000000400 0000000000000000 0000000000000000 0000000000000000
(XEN)    0000000000000000 0000000000000000 0000000000000000 0000000000000000
(XEN)    0000000000000000 0000000000000000 0000000000000000 0000000000000000
(XEN)    0000000000000000 0000000000000000 0000000000000000 0000000000000000
(XEN)    0000000000000000 0000000000000000 0000000000000000 0000000000000000
(XEN)    0000000000000000 0000000000000000 0000000000000000 0000000000000000
(XEN)    0000000000000000 0000000000000000 0000000000000000 0000000000000000
(XEN)    0000000000000000 0000000000000000 0000000000000000 0000000000000000
(XEN)    0000000000000000 0000000000000000 0000000000000000 0000000000000000
(XEN)    0000000000000000 0000000000000000 0000000000000000 0000000000000000
(XEN)    0000000000000000 0000000000000000 0000000000000000 0000000000000000
(XEN) Xen call trace:
(XEN)    [<00000000002b3ae0>] iommu_setup+0xa0/0x18c (PC)
(XEN)    [<00000000002b3a8c>] iommu_setup+0x4c/0x18c (LR)
(XEN)    [<00000000002bdd94>] start_xen+0xaa0/0xc7c
(XEN)    [<00000000002001b4>] arm64/head.o#primary_switched+0xc/0x2c
(XEN)
(XEN)
(XEN) ****************************************
(XEN) Panic on CPU 0:
(XEN) Assertion 'unreachable' failed at 
...ild-workspace/build/xen/xen/include/xen/iommu.h:72
(XEN) ****************************************
(XEN)


--
Regards,

Oleksandr Tyshchenko


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