1 files changed, 0 insertions, 56 deletions
diff --git a/tools/testing/selftests/kvm/lib/x86_64/ucall.c b/tools/testing/selftests/kvm/lib/x86_64/ucall.c
deleted file mode 100644
index 1265cecc7dd1..000000000000
--- a/tools/testing/selftests/kvm/lib/x86_64/ucall.c
+++ /dev/null
@@ -1,56 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * ucall support. A ucall is a "hypercall to userspace".
- *
- * Copyright (C) 2018, Red Hat, Inc.
- */
-#include "kvm_util.h"
-
-#define UCALL_PIO_PORT ((uint16_t)0x1000)
-
-void ucall_arch_do_ucall(vm_vaddr_t uc)
-{
-	/*
-	 * FIXME: Revert this hack (the entire commit that added it) once nVMX
-	 * preserves L2 GPRs across a nested VM-Exit.  If a ucall from L2, e.g.
-	 * to do a GUEST_SYNC(), lands the vCPU in L1, any and all GPRs can be
-	 * clobbered by L1.  Save and restore non-volatile GPRs (clobbering RBP
-	 * in particular is problematic) along with RDX and RDI (which are
-	 * inputs), and clobber volatile GPRs. *sigh*
-	 */
-#define HORRIFIC_L2_UCALL_CLOBBER_HACK	\
-	"rcx", "rsi", "r8", "r9", "r10", "r11"
-
-	asm volatile("push %%rbp\n\t"
-		     "push %%r15\n\t"
-		     "push %%r14\n\t"
-		     "push %%r13\n\t"
-		     "push %%r12\n\t"
-		     "push %%rbx\n\t"
-		     "push %%rdx\n\t"
-		     "push %%rdi\n\t"
-		     "in %[port], %%al\n\t"
-		     "pop %%rdi\n\t"
-		     "pop %%rdx\n\t"
-		     "pop %%rbx\n\t"
-		     "pop %%r12\n\t"
-		     "pop %%r13\n\t"
-		     "pop %%r14\n\t"
-		     "pop %%r15\n\t"
-		     "pop %%rbp\n\t"
-		: : [port] "d" (UCALL_PIO_PORT), "D" (uc) : "rax", "memory",
-		     HORRIFIC_L2_UCALL_CLOBBER_HACK);
-}
-
-void *ucall_arch_get_ucall(struct kvm_vcpu *vcpu)
-{
-	struct kvm_run *run = vcpu->run;
-
-	if (run->exit_reason == KVM_EXIT_IO && run->io.port == UCALL_PIO_PORT) {
-		struct kvm_regs regs;
-
-		vcpu_regs_get(vcpu, &regs);
-		return (void *)regs.rdi;
-	}
-	return NULL;
-}