x86/fpu: Rename xfeatures_mask_user() to xfeatures_mask_uabi()

Rename it so it's clear that this is about user ABI features which can
differ from the feature set which the kernel saves and restores because the
kernel handles e.g. PKRU differently. But the user ABI (ptrace, signal
frame) expects it to be there.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20210623121456.211585137@linutronix.de

3 files changed, 15 insertions, 15 deletions

diff --git a/arch/x86/kernel/fpu/core.c b/arch/x86/kernel/fpu/core.c
index afd0deee8cfd..12437383ff79 100644
--- a/arch/x86/kernel/fpu/core.c
+++ b/arch/x86/kernel/fpu/core.c
@@ -404,7 +404,7 @@ void fpu__clear_user_states(struct fpu *fpu)
 	}
 
 	/* Reset user states in registers. */
-	restore_fpregs_from_init_fpstate(xfeatures_mask_user());
+	restore_fpregs_from_init_fpstate(xfeatures_mask_uabi());
 
 	/*
 	 * Now all FPU registers have their desired values.  Inform the FPU
diff --git a/arch/x86/kernel/fpu/signal.c b/arch/x86/kernel/fpu/signal.c
index b12665c38a30..a42bc9d0b1cc 100644
--- a/arch/x86/kernel/fpu/signal.c
+++ b/arch/x86/kernel/fpu/signal.c
@@ -257,14 +257,14 @@ static int copy_user_to_fpregs_zeroing(void __user *buf, u64 xbv, int fx_only)
 
 	if (use_xsave()) {
 		if (fx_only) {
-			init_bv = xfeatures_mask_user() & ~XFEATURE_MASK_FPSSE;
+			init_bv = xfeatures_mask_uabi() & ~XFEATURE_MASK_FPSSE;
 
 			r = fxrstor_from_user_sigframe(buf);
 			if (!r)
 				os_xrstor(&init_fpstate.xsave, init_bv);
 			return r;
 		} else {
-			init_bv = xfeatures_mask_user() & ~xbv;
+			init_bv = xfeatures_mask_uabi() & ~xbv;
 
 			r = xrstor_from_user_sigframe(buf, xbv);
 			if (!r && unlikely(init_bv))
@@ -420,7 +420,7 @@ static int __fpu__restore_sig(void __user *buf, void __user *buf_fx, int size)
 	fpregs_unlock();
 
 	if (use_xsave() && !fx_only) {
-		u64 init_bv = xfeatures_mask_user() & ~user_xfeatures;
+		u64 init_bv = xfeatures_mask_uabi() & ~user_xfeatures;
 
 		ret = copy_sigframe_from_user_to_xstate(&fpu->state.xsave, buf_fx);
 		if (ret)
@@ -454,7 +454,7 @@ static int __fpu__restore_sig(void __user *buf, void __user *buf_fx, int size)
 		if (use_xsave()) {
 			u64 init_bv;
 
-			init_bv = xfeatures_mask_user() & ~XFEATURE_MASK_FPSSE;
+			init_bv = xfeatures_mask_uabi() & ~XFEATURE_MASK_FPSSE;
 			os_xrstor(&init_fpstate.xsave, init_bv);
 		}
 
@@ -549,7 +549,7 @@ void 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_user();
+	fx_sw_reserved.xfeatures = xfeatures_mask_uabi();
 	fx_sw_reserved.xstate_size = fpu_user_xstate_size;
 
 	if (IS_ENABLED(CONFIG_IA32_EMULATION) ||
diff --git a/arch/x86/kernel/fpu/xstate.c b/arch/x86/kernel/fpu/xstate.c
index bc71609ba65a..c513596f8ec9 100644
--- a/arch/x86/kernel/fpu/xstate.c
+++ b/arch/x86/kernel/fpu/xstate.c
@@ -144,7 +144,7 @@ void fpu__init_cpu_xstate(void)
 	 * managed by XSAVE{C, OPT, S} and XRSTOR{S}.  Only XSAVE user
 	 * states can be set here.
 	 */
-	xsetbv(XCR_XFEATURE_ENABLED_MASK, xfeatures_mask_user());
+	xsetbv(XCR_XFEATURE_ENABLED_MASK, xfeatures_mask_uabi());
 
 	/*
 	 * MSR_IA32_XSS sets supervisor states managed by XSAVES.
@@ -453,7 +453,7 @@ int xfeature_size(int xfeature_nr)
 static int validate_user_xstate_header(const struct xstate_header *hdr)
 {
 	/* No unknown or supervisor features may be set */
-	if (hdr->xfeatures & ~xfeatures_mask_user())
+	if (hdr->xfeatures & ~xfeatures_mask_uabi())
 		return -EINVAL;
 
 	/* Userspace must use the uncompacted format */
@@ -756,7 +756,7 @@ void __init fpu__init_system_xstate(void)
 	cpuid_count(XSTATE_CPUID, 1, &eax, &ebx, &ecx, &edx);
 	xfeatures_mask_all |= ecx + ((u64)edx << 32);
 
-	if ((xfeatures_mask_user() & XFEATURE_MASK_FPSSE) != XFEATURE_MASK_FPSSE) {
+	if ((xfeatures_mask_uabi() & XFEATURE_MASK_FPSSE) != XFEATURE_MASK_FPSSE) {
 		/*
 		 * This indicates that something really unexpected happened
 		 * with the enumeration.  Disable XSAVE and try to continue
@@ -791,7 +791,7 @@ void __init fpu__init_system_xstate(void)
 	 * Update info used for ptrace frames; use standard-format size and no
 	 * supervisor xstates:
 	 */
-	update_regset_xstate_info(fpu_user_xstate_size, xfeatures_mask_user());
+	update_regset_xstate_info(fpu_user_xstate_size, xfeatures_mask_uabi());
 
 	fpu__init_prepare_fx_sw_frame();
 	setup_init_fpu_buf();
@@ -828,14 +828,14 @@ void fpu__resume_cpu(void)
 	/*
 	 * Restore XCR0 on xsave capable CPUs:
 	 */
-	if (boot_cpu_has(X86_FEATURE_XSAVE))
-		xsetbv(XCR_XFEATURE_ENABLED_MASK, xfeatures_mask_user());
+	if (cpu_feature_enabled(X86_FEATURE_XSAVE))
+		xsetbv(XCR_XFEATURE_ENABLED_MASK, xfeatures_mask_uabi());
 
 	/*
 	 * Restore IA32_XSS. The same CPUID bit enumerates support
 	 * of XSAVES and MSR_IA32_XSS.
 	 */
-	if (boot_cpu_has(X86_FEATURE_XSAVES)) {
+	if (cpu_feature_enabled(X86_FEATURE_XSAVES)) {
 		wrmsrl(MSR_IA32_XSS, xfeatures_mask_supervisor()  |
 				     xfeatures_mask_independent());
 	}
@@ -993,7 +993,7 @@ void copy_xstate_to_uabi_buf(struct membuf to, struct xregs_state *xsave,
 		break;
 
 	case XSTATE_COPY_XSAVE:
-		header.xfeatures &= xfeatures_mask_user();
+		header.xfeatures &= xfeatures_mask_uabi();
 		break;
 	}
 
@@ -1038,7 +1038,7 @@ void copy_xstate_to_uabi_buf(struct membuf to, struct xregs_state *xsave,
 		 * compacted init_fpstate. The gap tracking will zero this
 		 * later.
 		 */
-		if (!(xfeatures_mask_user() & BIT_ULL(i)))
+		if (!(xfeatures_mask_uabi() & BIT_ULL(i)))
 			continue;
 
 		/*