diff --git a/arch/x86/include/asm/fpu/xstate.h b/arch/x86/include/asm/fpu/xstate.h index fe7c9af9ea421689d62f37655b216c79de3c037c..3c890b97f1950bb38635ac7a1d02e91d784a8126 100644 --- a/arch/x86/include/asm/fpu/xstate.h +++ b/arch/x86/include/asm/fpu/xstate.h @@ -83,15 +83,6 @@ static inline u64 xfeatures_mask_supervisor(void) return fpu_kernel_cfg.max_features & XFEATURE_MASK_SUPERVISOR_SUPPORTED; } -/* - * The xfeatures which are enabled in XCR0 and expected to be in ptrace - * buffers and signal frames. - */ -static inline u64 xfeatures_mask_uabi(void) -{ - return fpu_kernel_cfg.max_features & XFEATURE_MASK_USER_SUPPORTED; -} - /* * The xfeatures which are restored by the kernel when returning to user * mode. This is not necessarily the same as xfeatures_mask_uabi() as the diff --git a/arch/x86/kernel/fpu/core.c b/arch/x86/kernel/fpu/core.c index 501e21c341f19cdc5d4c9daacb1ce4ec05c671f1..5acc077cb9f1d3f53bac491cfe71fadc71b8c910 100644 --- a/arch/x86/kernel/fpu/core.c +++ b/arch/x86/kernel/fpu/core.c @@ -237,7 +237,7 @@ int fpu_copy_kvm_uabi_to_fpstate(struct fpu *fpu, const void *buf, u64 xcr0, } /* Ensure that XCOMP_BV is set up for XSAVES */ - xstate_init_xcomp_bv(&kstate->regs.xsave, xfeatures_mask_uabi()); + xstate_init_xcomp_bv(&kstate->regs.xsave, kstate->xfeatures); return 0; } EXPORT_SYMBOL_GPL(fpu_copy_kvm_uabi_to_fpstate); @@ -333,7 +333,7 @@ void fpstate_init_user(struct fpstate *fpstate) return; } - xstate_init_xcomp_bv(&fpstate->regs.xsave, xfeatures_mask_uabi()); + xstate_init_xcomp_bv(&fpstate->regs.xsave, fpstate->xfeatures); if (cpu_feature_enabled(X86_FEATURE_FXSR)) fpstate_init_fxstate(fpstate); diff --git a/arch/x86/kernel/fpu/signal.c b/arch/x86/kernel/fpu/signal.c index c14f477f56516f55ebf0b210ca1efe7ccd3a35cd..3e42e6e8b56ca3ac43418cf446ccad45b4630e4d 100644 --- a/arch/x86/kernel/fpu/signal.c +++ b/arch/x86/kernel/fpu/signal.c @@ -536,7 +536,7 @@ void __init fpu__init_prepare_fx_sw_frame(void) fx_sw_reserved.magic1 = FP_XSTATE_MAGIC1; fx_sw_reserved.extended_size = size; - fx_sw_reserved.xfeatures = xfeatures_mask_uabi(); + fx_sw_reserved.xfeatures = fpu_user_cfg.default_features; fx_sw_reserved.xstate_size = fpu_user_cfg.default_size; if (IS_ENABLED(CONFIG_IA32_EMULATION) || diff --git a/arch/x86/kernel/fpu/xstate.c b/arch/x86/kernel/fpu/xstate.c index 8b496c0eb1a530ed731396e1c236293daa0a27d0..9f92abd230dbc596a06692acbbc9cfd3bacfec5a 100644 --- a/arch/x86/kernel/fpu/xstate.c +++ b/arch/x86/kernel/fpu/xstate.c @@ -770,7 +770,7 @@ void __init fpu__init_system_xstate(unsigned int legacy_size) cpuid_count(XSTATE_CPUID, 1, &eax, &ebx, &ecx, &edx); fpu_kernel_cfg.max_features |= ecx + ((u64)edx << 32); - if ((xfeatures_mask_uabi() & XFEATURE_MASK_FPSSE) != XFEATURE_MASK_FPSSE) { + if ((fpu_kernel_cfg.max_features & XFEATURE_MASK_FPSSE) != XFEATURE_MASK_FPSSE) { /* * This indicates that something really unexpected happened * with the enumeration. Disable XSAVE and try to continue @@ -815,7 +815,7 @@ void __init fpu__init_system_xstate(unsigned int legacy_size) * supervisor xstates: */ update_regset_xstate_info(fpu_user_cfg.max_size, - xfeatures_mask_uabi()); + fpu_user_cfg.max_features); fpu__init_prepare_fx_sw_frame(); setup_init_fpu_buf(); @@ -853,7 +853,7 @@ void fpu__resume_cpu(void) * Restore XCR0 on xsave capable CPUs: */ if (cpu_feature_enabled(X86_FEATURE_XSAVE)) - xsetbv(XCR_XFEATURE_ENABLED_MASK, xfeatures_mask_uabi()); + xsetbv(XCR_XFEATURE_ENABLED_MASK, fpu_user_cfg.max_features); /* * Restore IA32_XSS. The same CPUID bit enumerates support