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Section 1.9 of TLFS v6.0b says:
"All structures are padded in such a way that fields are aligned
naturally (that is, an 8-byte field is aligned to an offset of 8 bytes
and so on)".
'struct enlightened_vmcs' has a glitch:
...
struct {
u32 nested_flush_hypercall:1; /* 836: 0 4 */
u32 msr_bitmap:1; /* 836: 1 4 */
u32 reserved:30; /* 836: 2 4 */
} hv_enlightenments_control; /* 836 4 */
u32 hv_vp_id; /* 840 4 */
u64 hv_vm_id; /* 844 8 */
u64 partition_assist_page; /* 852 8 */
...
And the observed values in 'partition_assist_page' make no sense at
all. Fix the layout by padding the structure properly.
Fixes: 68d1eb72ee ("x86/hyper-v: define struct hv_enlightened_vmcs and clean field bits")
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Link: https://lore.kernel.org/r/20220830133737.1539624-2-vkuznets@redhat.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.