svm_ops.h

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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __KVM_X86_SVM_OPS_H
#define __KVM_X86_SVM_OPS_H
 
#include <linux/compiler_types.h>
 
#include "x86.h"
 
#define svm_asm(insn, clobber...)               \
do {                                \
    asm goto("1: " __stringify(insn) "\n\t" \
              _ASM_EXTABLE(1b, %l[fault])       \
              ::: clobber : fault);         \
    return;                         \
fault:                              \
    kvm_spurious_fault();                   \
} while (0)
 
#define svm_asm1(insn, op1, clobber...)             \
do {                                \
    asm goto("1: "  __stringify(insn) " %0\n\t" \
              _ASM_EXTABLE(1b, %l[fault])       \
              :: op1 : clobber : fault);        \
    return;                         \
fault:                              \
    kvm_spurious_fault();                   \
} while (0)
 
#define svm_asm2(insn, op1, op2, clobber...)                \
do {                                    \
    asm goto("1: "  __stringify(insn) " %1, %0\n\t" \
              _ASM_EXTABLE(1b, %l[fault])           \
              :: op1, op2 : clobber : fault);       \
    return;                             \
fault:                                  \
    kvm_spurious_fault();                       \
} while (0)
 
static inline void clgi(void)
{
    svm_asm(clgi);
}
 
static inline void stgi(void)
{
    svm_asm(stgi);
}
 
static inline void invlpga(unsigned long addr, u32 asid)
{
    svm_asm2(invlpga, "c"(asid), "a"(addr));
}
 
/*
 * Despite being a physical address, the portion of rAX that is consumed by
 * VMSAVE, VMLOAD, etc... is still controlled by the effective address size,
 * hence 'unsigned long' instead of 'hpa_t'.
 */
static __always_inline void vmsave(unsigned long pa)
{
    svm_asm1(vmsave, "a" (pa), "memory");
}
 
#endif /* __KVM_X86_SVM_OPS_H */