diff --git a/arch/x86/platform/pvh/head.S b/arch/x86/platform/pvh/head.S
index c994ea58bdf7a..c4365a05ab83b 100644
--- a/arch/x86/platform/pvh/head.S
+++ b/arch/x86/platform/pvh/head.S
@@ -100,20 +100,7 @@ SYM_CODE_START_LOCAL(pvh_start_xen)
 	xor %edx, %edx
 	wrmsr
 
-	/*
-	 * Calculate load offset and store in phys_base.  __pa() needs
-	 * phys_base set to calculate the hypercall page in xen_pvh_init().
-	 */
-	movq %rbp, %rbx
-	subq $_pa(pvh_start_xen), %rbx
-	movq %rbx, phys_base(%rip)
 	call xen_prepare_pvh
-	/*
-	 * Clear phys_base.  __startup_64 will *add* to its value,
-	 * so reset to 0.
-	 */
-	xor  %rbx, %rbx
-	movq %rbx, phys_base(%rip)
 
 	/* startup_64 expects boot_params in %rsi. */
 	mov $_pa(pvh_bootparams), %rsi