[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v9 21/25] x86: L2 CAT: implement set value flow.
This patch implements L2 CAT set value related callback functions and domctl interface. Signed-off-by: Yi Sun <yi.y.sun@xxxxxxxxxxxxxxx> --- v9: - reuse some CAT common functions for L2 CAT to reduce redundant codes. (suggested by Roger Pau) - remove parameter 'found' from 'cat_compare_val' and modify the return values to let caller know if the id is found or not. These things are done in patch "x86: refactor psr: set value: implement cos finding flow." (suggested by Roger Pau and Dario Faggioli) - remove 'get_cos_num' related codes. (suggested by Jan Beulich) - modify 'l2_cat_write_msr' according to previous patch change. - changes about 'uint64_t' to 'uint32_t'. (suggested by Jan Beulich) v8: - modify 'l2_cat_write_msr' to 'void'. v5: - remove type check in callback function. (suggested by Jan Beulich) - modify return value of callback functions because we do not need them to return number of entries the feature uses. In caller, we call 'get_cos_num' to get the number of entries the feature uses. (suggested by Jan Beulich) - remove 'l2_cat_get_cos_max_from_type'. (suggested by Jan Beulich) - rename 'l2_cat_exceeds_cos_max' to 'l2_cat_fits_cos_max'. (suggested by Jan Beulich) v4: - create this patch because of codes architecture change. (suggested by Jan Beulich) --- xen/arch/x86/domctl.c | 6 ++++++ xen/arch/x86/psr.c | 17 +++++++++++++++++ xen/include/public/domctl.h | 1 + 3 files changed, 24 insertions(+) diff --git a/xen/arch/x86/domctl.c b/xen/arch/x86/domctl.c index 7f55cfd..e732b99 100644 --- a/xen/arch/x86/domctl.c +++ b/xen/arch/x86/domctl.c @@ -1454,6 +1454,12 @@ long arch_do_domctl( PSR_CBM_TYPE_L3_DATA); break; + case XEN_DOMCTL_PSR_CAT_OP_SET_L2_CBM: + ret = psr_set_val(d, domctl->u.psr_cat_op.target, + (uint32_t)domctl->u.psr_cat_op.data, + PSR_CBM_TYPE_L2); + break; + case XEN_DOMCTL_PSR_CAT_OP_GET_L3_CBM: domctl->u.psr_cat_op.data = 0; ret = psr_get_val(d, domctl->u.psr_cat_op.target, diff --git a/xen/arch/x86/psr.c b/xen/arch/x86/psr.c index 4cbcbe0..4059bbb 100644 --- a/xen/arch/x86/psr.c +++ b/xen/arch/x86/psr.c @@ -636,10 +636,27 @@ struct feat_ops l3_cdp_ops = { }; /* L2 CAT ops */ +static void l2_cat_write_msr(unsigned int cos, uint32_t val, + enum cbm_type type, struct feat_node *feat) +{ + if ( feat->cos_reg_val[cos] != val ) + { + feat->cos_reg_val[cos] = val; + wrmsrl(MSR_IA32_PSR_L2_MASK(cos), (uint64_t)val); + } + + return; +} + struct feat_ops l2_cat_ops = { .get_cos_max = cat_get_cos_max, .get_feat_info = cat_get_feat_info, .get_val = cat_get_val, + .get_old_val = cat_get_old_val, + .set_new_val = cat_set_new_val, + .compare_val = cat_compare_val, + .fits_cos_max = cat_fits_cos_max, + .write_msr = l2_cat_write_msr, }; static void __init parse_psr_bool(char *s, char *value, char *feature, diff --git a/xen/include/public/domctl.h b/xen/include/public/domctl.h index 8c183ba..523a2cd 100644 --- a/xen/include/public/domctl.h +++ b/xen/include/public/domctl.h @@ -1138,6 +1138,7 @@ struct xen_domctl_psr_cat_op { #define XEN_DOMCTL_PSR_CAT_OP_SET_L3_DATA 3 #define XEN_DOMCTL_PSR_CAT_OP_GET_L3_CODE 4 #define XEN_DOMCTL_PSR_CAT_OP_GET_L3_DATA 5 +#define XEN_DOMCTL_PSR_CAT_OP_SET_L2_CBM 6 #define XEN_DOMCTL_PSR_CAT_OP_GET_L2_CBM 7 uint32_t cmd; /* IN: XEN_DOMCTL_PSR_CAT_OP_* */ uint32_t target; /* IN */ -- 1.9.1 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx https://lists.xen.org/xen-devel
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