[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v7 20/24] 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> --- xen/arch/x86/domctl.c | 6 +++ xen/arch/x86/psr.c | 92 +++++++++++++++++++++++++++++++++++++++++ xen/include/asm-x86/msr-index.h | 1 + xen/include/public/domctl.h | 1 + 4 files changed, 100 insertions(+) diff --git a/xen/arch/x86/domctl.c b/xen/arch/x86/domctl.c index 68c2d60..38dc087 100644 --- a/xen/arch/x86/domctl.c +++ b/xen/arch/x86/domctl.c @@ -1439,6 +1439,12 @@ 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, + domctl->u.psr_cat_op.data, + PSR_CBM_TYPE_L2); + break; + case XEN_DOMCTL_PSR_CAT_OP_GET_L3_CBM: ret = psr_get_val(d, domctl->u.psr_cat_op.target, &domctl->u.psr_cat_op.data, diff --git a/xen/arch/x86/psr.c b/xen/arch/x86/psr.c index fe920c0..e29723d 100644 --- a/xen/arch/x86/psr.c +++ b/xen/arch/x86/psr.c @@ -752,10 +752,102 @@ static bool l2_cat_get_val(const struct feat_node *feat, unsigned int cos, return true; } +static unsigned int l2_cat_get_cos_num(const struct feat_node *feat) +{ + /* L2 CAT uses one COS. */ + return 1; +} + +static int l2_cat_get_old_val(uint64_t val[], + const struct feat_node *feat, + unsigned int old_cos) +{ + if ( old_cos > feat->info.l2_cat_info.cos_max ) + /* Use default value. */ + old_cos = 0; + + val[0] = feat->cos_reg_val[old_cos]; + + return 0; +} + +static int l2_cat_set_new_val(uint64_t val[], + const struct feat_node *feat, + enum cbm_type type, + uint64_t m) +{ + if ( !psr_check_cbm(feat->info.l2_cat_info.cbm_len, m) ) + return -EINVAL; + + val[0] = m; + + return 0; +} + +static int l2_cat_compare_val(const uint64_t val[], + const struct feat_node *feat, + unsigned int cos, bool *found) +{ + uint64_t l2_def_cbm; + + l2_def_cbm = (1ull << feat->info.l2_cat_info.cbm_len) - 1; + + if ( cos > feat->info.l2_cat_info.cos_max ) + { + if ( val[0] != l2_def_cbm ) + { + *found = false; + return -ENOENT; + } + *found = true; + } + else + *found = (val[0] == feat->cos_reg_val[cos]); + + return 0; +} + +static bool l2_cat_fits_cos_max(const uint64_t val[], + const struct feat_node *feat, + unsigned int cos) +{ + uint64_t l2_def_cbm; + + l2_def_cbm = (1ull << feat->info.l2_cat_info.cbm_len) - 1; + + if ( cos > feat->info.l2_cat_info.cos_max && + val[0] != l2_def_cbm ) + /* + * Exceed cos_max and value to set is not default, + * return error. + */ + return false; + + return true; +} + +static int l2_cat_write_msr(unsigned int cos, const uint64_t val[], + struct feat_node *feat) +{ + if ( cos > feat->info.l2_cat_info.cos_max ) + return -EINVAL; + + feat->cos_reg_val[cos] = val[0]; + wrmsrl(MSR_IA32_PSR_L2_MASK(cos), val[0]); + + return 0; +} + struct feat_ops l2_cat_ops = { .get_cos_max = l2_cat_get_cos_max, .get_feat_info = l2_cat_get_feat_info, .get_val = l2_cat_get_val, + .get_cos_num = l2_cat_get_cos_num, + .get_old_val = l2_cat_get_old_val, + .set_new_val = l2_cat_set_new_val, + .compare_val = l2_cat_compare_val, + .fits_cos_max = l2_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/asm-x86/msr-index.h b/xen/include/asm-x86/msr-index.h index 98dbff1..a41e63a 100644 --- a/xen/include/asm-x86/msr-index.h +++ b/xen/include/asm-x86/msr-index.h @@ -343,6 +343,7 @@ #define MSR_IA32_PSR_L3_MASK(n) (0x00000c90 + (n)) #define MSR_IA32_PSR_L3_MASK_CODE(n) (0x00000c90 + (n) * 2 + 1) #define MSR_IA32_PSR_L3_MASK_DATA(n) (0x00000c90 + (n) * 2) +#define MSR_IA32_PSR_L2_MASK(n) (0x00000d10 + (n)) /* Intel Model 6 */ #define MSR_P6_PERFCTR(n) (0x000000c1 + (n)) 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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