Re: [Qemu-ppc] [QEMU-PPC] [PATCH] target/ppc/spapr: Enable mitigations by default for pseries-4.0 machine type

[David Gibson]

On Wed, Feb 27, 2019 at 04:18:59PM +1100, Suraj Jitindar Singh wrote:
> There are currently 3 vulnerability mitigations controlled by the
> spapr-caps mechanism, cap-cfpc, cap-sbbc, and cap-ibs. Enable these
> mitigations by default for the pseries-4.0 machine type.
> 
> By now machine firmware should have been upgraded to allow these
> settings.
> Note: This means these caps will have to be set to broken for tcg
> 
> Signed-off-by: Suraj Jitindar Singh <address@hidden>

There was a conflict because you've diffed this against a tree which
already has your large decrementer patches, but I've fixed that up and applied.

> ---
>  hw/ppc/spapr.c | 9 ++++++---
>  1 file changed, 6 insertions(+), 3 deletions(-)
> 
> diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
> index 73aba70aa9..1ef8865dc5 100644
> --- a/hw/ppc/spapr.c
> +++ b/hw/ppc/spapr.c
> @@ -4313,9 +4313,9 @@ static void spapr_machine_class_init(ObjectClass *oc, 
> void *data)
>      smc->default_caps.caps[SPAPR_CAP_HTM] = SPAPR_CAP_OFF;
>      smc->default_caps.caps[SPAPR_CAP_VSX] = SPAPR_CAP_ON;
>      smc->default_caps.caps[SPAPR_CAP_DFP] = SPAPR_CAP_ON;
> -    smc->default_caps.caps[SPAPR_CAP_CFPC] = SPAPR_CAP_BROKEN;
> -    smc->default_caps.caps[SPAPR_CAP_SBBC] = SPAPR_CAP_BROKEN;
> -    smc->default_caps.caps[SPAPR_CAP_IBS] = SPAPR_CAP_BROKEN;
> +    smc->default_caps.caps[SPAPR_CAP_CFPC] = SPAPR_CAP_WORKAROUND;
> +    smc->default_caps.caps[SPAPR_CAP_SBBC] = SPAPR_CAP_WORKAROUND;
> +    smc->default_caps.caps[SPAPR_CAP_IBS] = SPAPR_CAP_FIXED_CCD;
>      smc->default_caps.caps[SPAPR_CAP_HPT_MAXPAGESIZE] = 16; /* 64kiB */
>      smc->default_caps.caps[SPAPR_CAP_NESTED_KVM_HV] = SPAPR_CAP_OFF;
>      smc->default_caps.caps[SPAPR_CAP_LARGE_DECREMENTER] = 1;
> @@ -4394,6 +4394,9 @@ static void 
> spapr_machine_3_1_class_options(MachineClass *mc)
>      mc->default_cpu_type = POWERPC_CPU_TYPE_NAME("power8_v2.0");
>      smc->update_dt_enabled = false;
>      smc->dr_phb_enabled = false;
> +    smc->default_caps.caps[SPAPR_CAP_CFPC] = SPAPR_CAP_BROKEN;
> +    smc->default_caps.caps[SPAPR_CAP_SBBC] = SPAPR_CAP_BROKEN;
> +    smc->default_caps.caps[SPAPR_CAP_IBS] = SPAPR_CAP_BROKEN;
>      smc->default_caps.caps[SPAPR_CAP_LARGE_DECREMENTER] = 0;
>  }
>  

-- 
David Gibson                    | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au  | minimalist, thank you.  NOT _the_ _other_
                                | _way_ _around_!
http://www.ozlabs.org/~dgibson

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