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src/arch/x86_64/include/bits/hyperv.h
51 строка
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Michael Brown
[build] Prevent use of MMX and SSE registers
20 мар 2018, 23:01
20 мар 2018, 23:01
1df3b53
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#ifndef _BITS_HYPERV_H #define _BITS_HYPERV_H /** @file * * Hyper-V interface * */ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); #include <stddef.h> #include <stdint.h> #include <ipxe/io.h> /** * Issue hypercall * * @v hv Hyper-V hypervisor * @v code Call code * @v in Input parameters * @v out Output parameters * @ret status Status code */ static inline __attribute__ (( always_inline )) int hv_call ( struct hv_hypervisor *hv, unsigned int code, const void *in, void *out ) { void *hypercall = hv->hypercall; register uint64_t rcx asm ( "rcx" ); register uint64_t rdx asm ( "rdx" ); register uint64_t r8 asm ( "r8" ); uint64_t in_phys; uint64_t out_phys; uint16_t result; in_phys = ( ( __builtin_constant_p ( in ) && ( in == NULL ) ) ? 0 : virt_to_phys ( in ) ); out_phys = ( ( __builtin_constant_p ( out ) && ( out == NULL ) ) ? 0 : virt_to_phys ( out ) ); rcx = code; rdx = in_phys; r8 = out_phys; __asm__ __volatile__ ( "call *%4" : "=a" ( result ), "+r" ( rcx ), "+r" ( rdx ), "+r" ( r8 ) : "m" ( hypercall ) : "r9", "r10", "r11" ); return result; } #endif /* _BITS_HYPERV_H */