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Virtualization: Eliminate requirement for clearing TCP checksum field for ILLAN checksum calculation

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Issue:  (05/17/2018 01:09:54 PM) Eliminate requirement for clearing TCP checksum field for ILLAN checksum calculation

Signed-off-by: Leonardo Bras <leonardo@linux.ibm.com>
pull/2/head
Leonardo Bras 4 years ago
parent ed9c6a357e
commit f3103f1562
1 changed files with 28 additions and 2 deletions
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30
Virtualization/ch_virtual_io.xml
Unescape Escape View File

@ -9975,7 +9975,32 @@ hcall ( const uint64 H_CHANGE_LOGICAL_LAN_MAC, /* Change the MAC address */
<tbody valign="middle">
<row>
<entry>
<para>0-47</para>
<para>0-45</para>
</entry>
<entry>
<para>Reserved</para>
</entry>
<entry>
<para>&#160;</para>
</entry>
</row>
<row>
<entry>
<para>46</para>
</entry>
<entry>
<para>Checksum Offload Non-zero Checksum Field Support</para>
</entry>
<entry>
<para>This bit is implemented when PHYP supports sending TCP
packets with a non-zero TCP checksum field when bit 6 of the
buffer descriptor (the "No Checksum" bit) is set. This bit
indicates R1–17.3.6.2.2–3 is not required.</para>
</entry>
</row>
<row>
<entry>
<para>47</para>
</entry>
<entry>
<para>Reserved</para>
@ -11401,7 +11426,8 @@ hcall ( const uint64 H_ILLAN_ATTRIBUTES,/* Returns in R4 the resulting ILLAN */
<para><emphasis role="bold">For the ILLAN Checksum Offload Support option:</emphasis> When
the caller of H_SEND_LOGICAL_LAN has set the No Checksum bit in the
Control field to a 1, then they must also have set the checksum field in
the packet to 0.</para>
the packet to 0, unless bit 46 in the ILLAN Attributes (the "Checksum Offload Non-zero
Checksum Field Support" bit) is set.</para>
</listitem>
</varlistentry>
</variablelist>

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