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206 lines
5.8 KiB
206 lines
5.8 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* definition for paravirtual devices on s390 |
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* |
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* Copyright IBM Corp. 2008 |
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* |
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* Author(s): Christian Borntraeger <[email protected]> |
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*/ |
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/* |
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* Hypercalls for KVM on s390. The calling convention is similar to the |
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* s390 ABI, so we use R2-R6 for parameters 1-5. In addition we use R1 |
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* as hypercall number and R7 as parameter 6. The return value is |
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* written to R2. We use the diagnose instruction as hypercall. To avoid |
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* conflicts with existing diagnoses for LPAR and z/VM, we do not use |
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* the instruction encoded number, but specify the number in R1 and |
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* use 0x500 as KVM hypercall |
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* |
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* Copyright IBM Corp. 2007,2008 |
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* Author(s): Christian Borntraeger <[email protected]> |
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*/ |
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#ifndef __S390_KVM_PARA_H |
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#define __S390_KVM_PARA_H |
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#include <uapi/asm/kvm_para.h> |
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#include <asm/diag.h> |
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static inline long __kvm_hypercall0(unsigned long nr) |
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{ |
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register unsigned long __nr asm("1") = nr; |
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register long __rc asm("2"); |
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asm volatile ("diag 2,4,0x500\n" |
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: "=d" (__rc) : "d" (__nr): "memory", "cc"); |
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return __rc; |
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} |
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static inline long kvm_hypercall0(unsigned long nr) |
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{ |
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diag_stat_inc(DIAG_STAT_X500); |
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return __kvm_hypercall0(nr); |
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} |
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static inline long __kvm_hypercall1(unsigned long nr, unsigned long p1) |
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{ |
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register unsigned long __nr asm("1") = nr; |
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register unsigned long __p1 asm("2") = p1; |
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register long __rc asm("2"); |
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asm volatile ("diag 2,4,0x500\n" |
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: "=d" (__rc) : "d" (__nr), "0" (__p1) : "memory", "cc"); |
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return __rc; |
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} |
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static inline long kvm_hypercall1(unsigned long nr, unsigned long p1) |
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{ |
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diag_stat_inc(DIAG_STAT_X500); |
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return __kvm_hypercall1(nr, p1); |
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} |
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static inline long __kvm_hypercall2(unsigned long nr, unsigned long p1, |
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unsigned long p2) |
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{ |
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register unsigned long __nr asm("1") = nr; |
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register unsigned long __p1 asm("2") = p1; |
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register unsigned long __p2 asm("3") = p2; |
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register long __rc asm("2"); |
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asm volatile ("diag 2,4,0x500\n" |
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: "=d" (__rc) : "d" (__nr), "0" (__p1), "d" (__p2) |
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: "memory", "cc"); |
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return __rc; |
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} |
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static inline long kvm_hypercall2(unsigned long nr, unsigned long p1, |
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unsigned long p2) |
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{ |
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diag_stat_inc(DIAG_STAT_X500); |
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return __kvm_hypercall2(nr, p1, p2); |
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} |
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static inline long __kvm_hypercall3(unsigned long nr, unsigned long p1, |
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unsigned long p2, unsigned long p3) |
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{ |
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register unsigned long __nr asm("1") = nr; |
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register unsigned long __p1 asm("2") = p1; |
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register unsigned long __p2 asm("3") = p2; |
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register unsigned long __p3 asm("4") = p3; |
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register long __rc asm("2"); |
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asm volatile ("diag 2,4,0x500\n" |
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: "=d" (__rc) : "d" (__nr), "0" (__p1), "d" (__p2), |
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"d" (__p3) : "memory", "cc"); |
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return __rc; |
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} |
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static inline long kvm_hypercall3(unsigned long nr, unsigned long p1, |
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unsigned long p2, unsigned long p3) |
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{ |
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diag_stat_inc(DIAG_STAT_X500); |
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return __kvm_hypercall3(nr, p1, p2, p3); |
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} |
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static inline long __kvm_hypercall4(unsigned long nr, unsigned long p1, |
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unsigned long p2, unsigned long p3, |
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unsigned long p4) |
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{ |
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register unsigned long __nr asm("1") = nr; |
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register unsigned long __p1 asm("2") = p1; |
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register unsigned long __p2 asm("3") = p2; |
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register unsigned long __p3 asm("4") = p3; |
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register unsigned long __p4 asm("5") = p4; |
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register long __rc asm("2"); |
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asm volatile ("diag 2,4,0x500\n" |
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: "=d" (__rc) : "d" (__nr), "0" (__p1), "d" (__p2), |
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"d" (__p3), "d" (__p4) : "memory", "cc"); |
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return __rc; |
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} |
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static inline long kvm_hypercall4(unsigned long nr, unsigned long p1, |
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unsigned long p2, unsigned long p3, |
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unsigned long p4) |
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{ |
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diag_stat_inc(DIAG_STAT_X500); |
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return __kvm_hypercall4(nr, p1, p2, p3, p4); |
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} |
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static inline long __kvm_hypercall5(unsigned long nr, unsigned long p1, |
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unsigned long p2, unsigned long p3, |
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unsigned long p4, unsigned long p5) |
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{ |
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register unsigned long __nr asm("1") = nr; |
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register unsigned long __p1 asm("2") = p1; |
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register unsigned long __p2 asm("3") = p2; |
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register unsigned long __p3 asm("4") = p3; |
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register unsigned long __p4 asm("5") = p4; |
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register unsigned long __p5 asm("6") = p5; |
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register long __rc asm("2"); |
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asm volatile ("diag 2,4,0x500\n" |
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: "=d" (__rc) : "d" (__nr), "0" (__p1), "d" (__p2), |
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"d" (__p3), "d" (__p4), "d" (__p5) : "memory", "cc"); |
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return __rc; |
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} |
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static inline long kvm_hypercall5(unsigned long nr, unsigned long p1, |
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unsigned long p2, unsigned long p3, |
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unsigned long p4, unsigned long p5) |
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{ |
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diag_stat_inc(DIAG_STAT_X500); |
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return __kvm_hypercall5(nr, p1, p2, p3, p4, p5); |
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} |
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static inline long __kvm_hypercall6(unsigned long nr, unsigned long p1, |
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unsigned long p2, unsigned long p3, |
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unsigned long p4, unsigned long p5, |
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unsigned long p6) |
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{ |
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register unsigned long __nr asm("1") = nr; |
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register unsigned long __p1 asm("2") = p1; |
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register unsigned long __p2 asm("3") = p2; |
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register unsigned long __p3 asm("4") = p3; |
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register unsigned long __p4 asm("5") = p4; |
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register unsigned long __p5 asm("6") = p5; |
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register unsigned long __p6 asm("7") = p6; |
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register long __rc asm("2"); |
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asm volatile ("diag 2,4,0x500\n" |
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: "=d" (__rc) : "d" (__nr), "0" (__p1), "d" (__p2), |
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"d" (__p3), "d" (__p4), "d" (__p5), "d" (__p6) |
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: "memory", "cc"); |
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return __rc; |
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} |
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static inline long kvm_hypercall6(unsigned long nr, unsigned long p1, |
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unsigned long p2, unsigned long p3, |
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unsigned long p4, unsigned long p5, |
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unsigned long p6) |
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{ |
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diag_stat_inc(DIAG_STAT_X500); |
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return __kvm_hypercall6(nr, p1, p2, p3, p4, p5, p6); |
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} |
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/* kvm on s390 is always paravirtualization enabled */ |
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static inline int kvm_para_available(void) |
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{ |
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return 1; |
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} |
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/* No feature bits are currently assigned for kvm on s390 */ |
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static inline unsigned int kvm_arch_para_features(void) |
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{ |
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return 0; |
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} |
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static inline unsigned int kvm_arch_para_hints(void) |
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{ |
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return 0; |
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} |
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static inline bool kvm_check_and_clear_guest_paused(void) |
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{ |
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return false; |
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} |
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#endif /* __S390_KVM_PARA_H */
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