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Catch up with CURRENTs different timer usage compared to 8.1. A counter

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value of 0 in rategen mode is equivalent to a max initial value.
The TSC is now correctly calibrated on a 9.0 guest.

Obtained from:	NetApp
This commit is contained in:
Peter Grehan 2011-05-24 01:08:53 +00:00
parent ad54f37429
commit 32c39f32cd
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/projects/bhyve/; revision=222238
1 changed files with 2 additions and 0 deletions
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usr.sbin/bhyve/pit_8254.c
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@ -183,6 +183,8 @@ pit_8254_handler(struct vmctx *ctx, int vcpu, int in, int port, int bytes,
if (c->crbyte == 2) {
c->crbyte = 0;
c->initial = c->cr[0] | (uint16_t)c->cr[1] << 8;
if (c->initial == 0)
c->initial = 0xffff;
gettimeofday(&c->tv, NULL);
}
}