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Re: [PATCH v6 01/82] target/arm: Add ID_AA64ZFR0 fields and isar_feature


From: Richard Henderson
Subject: Re: [PATCH v6 01/82] target/arm: Add ID_AA64ZFR0 fields and isar_feature_aa64_sve2
Date: Tue, 11 May 2021 12:20:14 -0500
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.8.1

On 5/11/21 2:55 AM, Peter Maydell wrote:
This code is earlier in the function than the place where we
update ahcf->isar to set the "SVE supported bits":

     /* Add feature bits that can't appear until after VCPU init. */
     if (sve_supported) {
         t = ahcf->isar.id_aa64pfr0;
         t = FIELD_DP64(t, ID_AA64PFR0, SVE, 1);
         ahcf->isar.id_aa64pfr0 = t;
     }

so won't the condition here be always false ?

Good catch, thanks.
I guess I can test this running kvm inside tcg.


r~



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