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[xen] Add basic support for PV-HVM domains

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Add basic support for Xen PV-HVM domains (detected via the Xen
platform PCI device with IDs 5853:0001), including support for
accessing configuration via XenStore and enumerating devices via
XenBus.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2014-07-28 23:38:30 +01:00
parent ec94a8798f
commit 036af27a45
18 changed files with 2272 additions and 0 deletions
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1
src/arch/x86/include/bits/errfile.h
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@@ -45,6 +45,7 @@ FILE_LICENCE ( GPL2_OR_LATER );
#define ERRFILE_timer_rdtsc ( ERRFILE_ARCH | ERRFILE_DRIVER | 0x00000000 )
#define ERRFILE_timer_bios ( ERRFILE_ARCH | ERRFILE_DRIVER | 0x00010000 )
#define ERRFILE_hvm ( ERRFILE_ARCH | ERRFILE_DRIVER | 0x00020000 )
#define ERRFILE_cpuid_cmd ( ERRFILE_ARCH | ERRFILE_OTHER | 0x00000000 )
#define ERRFILE_cpuid_settings ( ERRFILE_ARCH | ERRFILE_OTHER | 0x00010000 )

164
src/arch/x86/include/bits/xen.h Normal file
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@@ -0,0 +1,164 @@
#ifndef _BITS_XEN_H
#define _BITS_XEN_H
/** @file
*
* Xen interface
*
*/
FILE_LICENCE ( GPL2_OR_LATER );
/* Hypercall registers */
#ifdef __x86_64__
#define XEN_REG1 "rdi"
#define XEN_REG2 "rsi"
#define XEN_REG3 "rdx"
#define XEN_REG4 "r10"
#define XEN_REG5 "r8"
#else
#define XEN_REG1 "ebx"
#define XEN_REG2 "ecx"
#define XEN_REG3 "edx"
#define XEN_REG4 "esi"
#define XEN_REG5 "edi"
#endif
/** A hypercall entry point */
struct xen_hypercall {
/** Code generated by hypervisor */
uint8_t code[32];
} __attribute__ (( packed ));
/**
* Issue hypercall with one argument
*
* @v xen Xen hypervisor
* @v hypercall Hypercall number
* @v arg1 First argument
* @ret retval Return value
*/
static inline __attribute__ (( always_inline )) unsigned long
xen_hypercall_1 ( struct xen_hypervisor *xen, unsigned int hypercall,
unsigned long arg1 ) {
register unsigned long reg1 asm ( XEN_REG1 ) = arg1;
unsigned long retval;
__asm__ __volatile__ ( "call *%2"
: "=a" ( retval ), "+r" ( reg1 )
: "r" ( &xen->hypercall[hypercall] )
: XEN_REG2, XEN_REG3, XEN_REG4, XEN_REG5,
"memory" );
return retval;
}
/**
* Issue hypercall with two arguments
*
* @v xen Xen hypervisor
* @v hypercall Hypercall number
* @v arg1 First argument
* @v arg2 Second argument
* @ret retval Return value
*/
static inline __attribute__ (( always_inline )) unsigned long
xen_hypercall_2 ( struct xen_hypervisor *xen, unsigned int hypercall,
unsigned long arg1, unsigned long arg2 ) {
register unsigned long reg1 asm ( XEN_REG1 ) = arg1;
register unsigned long reg2 asm ( XEN_REG2 ) = arg2;
unsigned long retval;
__asm__ __volatile__ ( "call *%3"
: "=a" ( retval ), "+r" ( reg1 ), "+r" ( reg2 )
: "r" ( &xen->hypercall[hypercall] )
: XEN_REG3, XEN_REG4, XEN_REG5, "memory" );
return retval;
}
/**
* Issue hypercall with three arguments
*
* @v xen Xen hypervisor
* @v hypercall Hypercall number
* @v arg1 First argument
* @v arg2 Second argument
* @v arg3 Third argument
* @ret retval Return value
*/
static inline __attribute__ (( always_inline )) unsigned long
xen_hypercall_3 ( struct xen_hypervisor *xen, unsigned int hypercall,
unsigned long arg1, unsigned long arg2, unsigned long arg3 ) {
register unsigned long reg1 asm ( XEN_REG1 ) = arg1;
register unsigned long reg2 asm ( XEN_REG2 ) = arg2;
register unsigned long reg3 asm ( XEN_REG3 ) = arg3;
unsigned long retval;
__asm__ __volatile__ ( "call *%4"
: "=a" ( retval ), "+r" ( reg1 ), "+r" ( reg2 ),
"+r" ( reg3 )
: "r" ( &xen->hypercall[hypercall] )
: XEN_REG4, XEN_REG5, "memory" );
return retval;
}
/**
* Issue hypercall with four arguments
*
* @v xen Xen hypervisor
* @v hypercall Hypercall number
* @v arg1 First argument
* @v arg2 Second argument
* @v arg3 Third argument
* @v arg4 Fourth argument
* @ret retval Return value
*/
static inline __attribute__ (( always_inline )) unsigned long
xen_hypercall_4 ( struct xen_hypervisor *xen, unsigned int hypercall,
unsigned long arg1, unsigned long arg2, unsigned long arg3,
unsigned long arg4 ) {
register unsigned long reg1 asm ( XEN_REG1 ) = arg1;
register unsigned long reg2 asm ( XEN_REG2 ) = arg2;
register unsigned long reg3 asm ( XEN_REG3 ) = arg3;
register unsigned long reg4 asm ( XEN_REG4 ) = arg4;
unsigned long retval;
__asm__ __volatile__ ( "call *%5"
: "=a" ( retval ), "+r" ( reg1 ), "+r" ( reg2 ),
"+r" ( reg3 ), "+r" ( reg4 )
: "r" ( &xen->hypercall[hypercall] )
: XEN_REG5, "memory" );
return retval;
}
/**
* Issue hypercall with five arguments
*
* @v xen Xen hypervisor
* @v hypercall Hypercall number
* @v arg1 First argument
* @v arg2 Second argument
* @v arg3 Third argument
* @v arg4 Fourth argument
* @v arg5 Fifth argument
* @ret retval Return value
*/
static inline __attribute__ (( always_inline )) unsigned long
xen_hypercall_5 ( struct xen_hypervisor *xen, unsigned int hypercall,
unsigned long arg1, unsigned long arg2, unsigned long arg3,
unsigned long arg4, unsigned long arg5 ) {
register unsigned long reg1 asm ( XEN_REG1 ) = arg1;
register unsigned long reg2 asm ( XEN_REG2 ) = arg2;
register unsigned long reg3 asm ( XEN_REG3 ) = arg3;
register unsigned long reg4 asm ( XEN_REG4 ) = arg4;
register unsigned long reg5 asm ( XEN_REG5 ) = arg5;
unsigned long retval;
__asm__ __volatile__ ( "call *%6"
: "=a" ( retval ), "+r" ( reg1 ), "+r" ( reg2 ),
"+r" ( reg3 ), "+r" ( reg4 ), "+r" ( reg5 )
: "r" ( &xen->hypercall[hypercall] )
: "memory" );
return retval;
}
#endif /* _BITS_XEN_H */