* Re: [PATCH RESEND] kvm:x86:Make sure kvm_write_guest successes for first call in kvm_write_wall_clock
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@ 2016-01-07 10:07 ` Paolo Bonzini
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From: Paolo Bonzini @ 2016-01-07 10:07 UTC (permalink / raw)
To: Nicholas Krause, gleb; +Cc: x86, kvm, linux-kernel
On 30/12/2015 19:08, Nicholas Krause wrote:
> This makes sure that kvm_write_guest successes for the first call
> in order to make sure that the wall clock is successfully written
> to the host system before being calucated as required by the
> guest system.
>
> Signed-off-by: Nicholas Krause <xerofoify@gmail.com>
> ---
> arch/x86/kvm/x86.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
> index eed3228..7551f30 100644
> --- a/arch/x86/kvm/x86.c
> +++ b/arch/x86/kvm/x86.c
> @@ -1167,7 +1167,8 @@ static void kvm_write_wall_clock(struct kvm *kvm, gpa_t wall_clock)
>
> ++version;
>
> - kvm_write_guest(kvm, wall_clock, &version, sizeof(version));
> + if (kvm_write_guest(kvm, wall_clock, &version, sizeof(version)))
> + return;
>
> /*
> * The guest calculates current wall clock time by adding
>
Applied, thanks.
Paolo
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