Re: [Qemu-devel] [Qemu-ppc] [PATCH] spapr: add missing break in h_get_cpu_characteristics()

[Daniel Henrique Barboza <danielhb@linux.vnet.ibm.com>]

On 02/01/2018 05:47 PM, Greg Kurz wrote:
> Detected by Coverity (CID 1385702). This fixes the recently added hypercall
> to let guests properly apply Spectre and Meltdown workarounds.

Paolo Bonzini reported this error in a reply to the pull request that
added the patch:

"Re: [Qemu-ppc] [Qemu-devel] [PULL 12/12] target/ppc/spapr: Add H-Call 
H_GET_CPU_CHARACTERISTICS

On 28/01/2018 22:28, David Gibson wrote:

> +    switch (safe_indirect_branch) {
> +    case SPAPR_CAP_FIXED:
> +        characteristics |= H_CPU_CHAR_BCCTRL_SERIALISED;

Missing "break;" here.

Paolo

"

I think it is nice to mention in the commit msg that Paolo also detected 
this same error,
specially given that his email was sent before this patch.


Thanks,


Daniel


>
> Fixes: c59704b25473 "target/ppc/spapr: Add H-Call H_GET_CPU_CHARACTERISTICS"
> Signed-off-by: Greg Kurz <groug@kaod.org>
> ---
>   hw/ppc/spapr_hcall.c |    1 +
>   1 file changed, 1 insertion(+)
>
> diff --git a/hw/ppc/spapr_hcall.c b/hw/ppc/spapr_hcall.c
> index 4d0e6eb0cf1d..596f58378a40 100644
> --- a/hw/ppc/spapr_hcall.c
> +++ b/hw/ppc/spapr_hcall.c
> @@ -1697,6 +1697,7 @@ static target_ulong h_get_cpu_characteristics(PowerPCCPU *cpu,
>       switch (safe_indirect_branch) {
>       case SPAPR_CAP_FIXED:
>           characteristics |= H_CPU_CHAR_BCCTRL_SERIALISED;
> +        break;
>       default: /* broken */
>           assert(safe_indirect_branch == SPAPR_CAP_BROKEN);
>           break;
>
>