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| author | Michael Brown | 2017-01-26 09:03:11 +0100 |
|---|---|---|
| committer | Michael Brown | 2017-01-26 09:19:26 +0100 |
| commit | f3ba0fb5fdd866961b5dfc0d227af60b25753f0e (patch) | |
| tree | f2473a45a68f0e992b37798b6cef9cb31eb36b87 /src/include/assert.h | |
| parent | [time] Allow timer to be selected at runtime (diff) | |
| download | ipxe-f3ba0fb5fdd866961b5dfc0d227af60b25753f0e.tar.gz ipxe-f3ba0fb5fdd866961b5dfc0d227af60b25753f0e.tar.xz ipxe-f3ba0fb5fdd866961b5dfc0d227af60b25753f0e.zip | |
[hyperv] Provide timer based on the 10MHz time reference count MSR
When running on AMD platforms, the legacy hardware emulation is
extremely unreliable. In particular, the IRQ0 timer interrupt is
likely to simply stop working, resulting in a total failure of any
code that relies on timers (such as DHCP retransmission attempts).
Work around this by using the 10MHz time counter provided by Hyper-V
via an MSR. (This timer can be tested in KVM via the command-line
option "-cpu host,hv_time".)
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Diffstat (limited to 'src/include/assert.h')
0 files changed, 0 insertions, 0 deletions