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SUSE:SLE-15-SP5:GA
xen.26341
62cd91d2-x86-spec-ctrl-rename-opt_ibpb.patch
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File 62cd91d2-x86-spec-ctrl-rename-opt_ibpb.patch of Package xen.26341
# Commit a8e5ef079d6f5c88c472e3e620db5a8d1402a50d # Date 2022-07-12 16:23:00 +0100 # Author Andrew Cooper <andrew.cooper3@citrix.com> # Committer Andrew Cooper <andrew.cooper3@citrix.com> x86/spec-ctrl: Rename opt_ibpb to opt_ibpb_ctxt_switch We are about to introduce the use of IBPB at different points in Xen, making opt_ibpb ambiguous. Rename it to opt_ibpb_ctxt_switch. No functional change. Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com> Reviewed-by: Jan Beulich <jbeulich@suse.com> --- a/xen/arch/x86/domain.c +++ b/xen/arch/x86/domain.c @@ -1810,7 +1810,7 @@ void context_switch(struct vcpu *prev, s ctxt_switch_levelling(next); - if ( opt_ibpb && !is_idle_domain(nextd) ) + if ( opt_ibpb_ctxt_switch && !is_idle_domain(nextd) ) { static DEFINE_PER_CPU(unsigned int, last); unsigned int *last_id = &this_cpu(last); --- a/xen/arch/x86/spec_ctrl.c +++ b/xen/arch/x86/spec_ctrl.c @@ -54,7 +54,7 @@ int8_t __initdata opt_stibp = -1; bool __read_mostly opt_ssbd; int8_t __initdata opt_psfd = -1; -bool __read_mostly opt_ibpb = true; +bool __read_mostly opt_ibpb_ctxt_switch = true; int8_t __read_mostly opt_eager_fpu = -1; int8_t __read_mostly opt_l1d_flush = -1; bool __read_mostly opt_branch_harden = true; @@ -117,7 +117,7 @@ static int __init parse_spec_ctrl(const opt_thunk = THUNK_JMP; opt_ibrs = 0; - opt_ibpb = false; + opt_ibpb_ctxt_switch = false; opt_ssbd = false; opt_l1d_flush = 0; opt_branch_harden = false; @@ -238,7 +238,7 @@ static int __init parse_spec_ctrl(const /* Misc settings. */ else if ( (val = parse_boolean("ibpb", s, ss)) >= 0 ) - opt_ibpb = val; + opt_ibpb_ctxt_switch = val; else if ( (val = parse_boolean("eager-fpu", s, ss)) >= 0 ) opt_eager_fpu = val; else if ( (val = parse_boolean("l1d-flush", s, ss)) >= 0 ) @@ -458,7 +458,7 @@ static void __init print_details(enum in (opt_tsx & 1) ? " TSX+" : " TSX-", !cpu_has_srbds_ctrl ? "" : opt_srb_lock ? " SRB_LOCK+" : " SRB_LOCK-", - opt_ibpb ? " IBPB" : "", + opt_ibpb_ctxt_switch ? " IBPB-ctxt" : "", opt_l1d_flush ? " L1D_FLUSH" : "", opt_md_clear_pv || opt_md_clear_hvm || opt_fb_clear_mmio ? " VERW" : "", @@ -1193,7 +1193,7 @@ void __init init_speculation_mitigations /* Check we have hardware IBPB support before using it... */ if ( !boot_cpu_has(X86_FEATURE_IBRSB) && !boot_cpu_has(X86_FEATURE_IBPB) ) - opt_ibpb = false; + opt_ibpb_ctxt_switch = false; /* Check whether Eager FPU should be enabled by default. */ if ( opt_eager_fpu == -1 ) --- a/xen/include/asm-x86/spec_ctrl.h +++ b/xen/include/asm-x86/spec_ctrl.h @@ -63,7 +63,7 @@ void init_speculation_mitigations(void); void spec_ctrl_init_domain(struct domain *d); -extern bool opt_ibpb; +extern bool opt_ibpb_ctxt_switch; extern bool opt_ssbd; extern int8_t opt_eager_fpu; extern int8_t opt_l1d_flush;
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