KVM: PPC: Fix DEC truncation for greater than 0xffff_ffff/1000

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kvmppc_emulate_dec() uses dec_nsec of type unsigned long and does below calculation:

        dec_nsec = vcpu->arch.dec;
        dec_nsec *= 1000;
This will truncate if DEC value "vcpu->arch.dec" is greater than 0xffff_ffff/1000.
For example : For tb_ticks_per_usec = 4a, we can not set decrementer more than ~58ms.

Signed-off-by: Bharat Bhushan <bharat.bhushan@freescale.com>
Acked-by: Liu Yu <yu.liu@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>

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Bharat Bhushan 2011-10-19 09:46:06 +05:30 • committed by Avi Kivity

parent f9208427f7

commit dc2babfea5

1 changed files with 7 additions and 5 deletions

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arch/powerpc/kvm/emulate.c

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