[REGRESSION] Linux 6.6.64 crashes when booting as PVH domU

[Marek Marczykowski-Górecki <marmarek@xxxxxxxxxxxxxxxxxxxxxx>]

Hi,

With Linux 6.6.64 I get the following crash on domU boot:

(XEN) d5v0 Triple fault - invoking HVM shutdown action 1
(XEN) *** Dumping Dom5 vcpu#0 state: ***
(XEN) ----[ Xen-4.19.0  x86_64  debug=n  Tainted:  M     ]----
(XEN) CPU:    4
(XEN) RIP:    0008:[<ffffffff82b64050>]
(XEN) RFLAGS: 0000000000010086   CONTEXT: hvm guest (d5v0)
(XEN) rax: ffffffff82b64050   rbx: ffffffffffe00000   rcx: 00000000c0000101
(XEN) rdx: 0000000000000000   rsi: 0000000003a00038   rdi: 0000000002a9bc98
(XEN) rbp: 0000000000000000   rsp: 0000000002aa0ce8   r8:  0000000000000000
(XEN) r9:  0000000000000000   r10: 0000000000000000   r11: 0000000000000000
(XEN) r12: 0000000000000000   r13: 0000000000000000   r14: 0000000000000000
(XEN) r15: 0000000000000000   cr0: 0000000080000011   cr4: 0000000000000020
(XEN) cr3: 0000000002022000   cr2: 0000000000000000
(XEN) fsb: 0000000000000000   gsb: 0000000002a9ccc0   gss: 0000000000000000
(XEN) ds: 0010   es: 0010   fs: 0000   gs: 0000   ss: 0010   cs: 0008

Linux 6.6.63 works fine.

Looking at the changes, I suspect one of those:

    83d123e27623 x86/pvh: Call C code via the kernel virtual mapping
    f662b4a69e1d x86/pvh: Set phys_base when calling xen_prepare_pvh()

But I haven't tested this hypothesis yet.

-- 
Best Regards,
Marek Marczykowski-Górecki
Invisible Things Lab

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