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replay: record and replay random number sources

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Record/replay feature of icount allows deterministic running of execution
scenarios. Some CPUs and peripheral devices read random numbers from
external sources making deterministic execution impossible.
This patch adds recording and replaying of random read operations
into guest-random module, which is used by the virtual hardware.

Signed-off-by: Pavel Dovgalyuk <Pavel.Dovgaluk@ispras.ru>
Message-Id: <157675984852.14505.15709141760677102489.stgit@pasha-Precision-3630-Tower>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Pavel Dovgalyuk 2019-12-19 15:50:48 +03:00 • committed by Paolo Bonzini
parent fc6b2dbac1
commit 878ec29b9c
8 changed files with 77 additions and 4 deletions
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docs/replay.txt
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@ -67,6 +67,7 @@ Modifications of qemu include:
* network filter for recording and replaying the packets
* block driver for making block layer deterministic
* serial port input record and replay
* recording of random numbers obtained from the external sources
Locking and thread synchronisation
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