forked from luck/tmp_suning_uos_patched
a489f0b555
Fixes guest crash 'lguest: bad read address 0x4800000 len 256' The new per-cpu allocator ends up handing a non-linear address to write_gdt_entry. We do __pa() on it, and hand it to the host, which kills us. I've long wanted to make the hypercall "LOAD_GDT_ENTRY" to match the IDT code, but had no pressing reason until now. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: lguest@ozlabs.org
56 lines
1.8 KiB
C
56 lines
1.8 KiB
C
/* Architecture specific portion of the lguest hypercalls */
|
|
#ifndef _ASM_X86_LGUEST_HCALL_H
|
|
#define _ASM_X86_LGUEST_HCALL_H
|
|
|
|
#define LHCALL_FLUSH_ASYNC 0
|
|
#define LHCALL_LGUEST_INIT 1
|
|
#define LHCALL_SHUTDOWN 2
|
|
#define LHCALL_NEW_PGTABLE 4
|
|
#define LHCALL_FLUSH_TLB 5
|
|
#define LHCALL_LOAD_IDT_ENTRY 6
|
|
#define LHCALL_SET_STACK 7
|
|
#define LHCALL_TS 8
|
|
#define LHCALL_SET_CLOCKEVENT 9
|
|
#define LHCALL_HALT 10
|
|
#define LHCALL_SET_PTE 14
|
|
#define LHCALL_SET_PMD 15
|
|
#define LHCALL_LOAD_TLS 16
|
|
#define LHCALL_NOTIFY 17
|
|
#define LHCALL_LOAD_GDT_ENTRY 18
|
|
|
|
#define LGUEST_TRAP_ENTRY 0x1F
|
|
|
|
/* Argument number 3 to LHCALL_LGUEST_SHUTDOWN */
|
|
#define LGUEST_SHUTDOWN_POWEROFF 1
|
|
#define LGUEST_SHUTDOWN_RESTART 2
|
|
|
|
#ifndef __ASSEMBLY__
|
|
#include <asm/hw_irq.h>
|
|
#include <asm/kvm_para.h>
|
|
|
|
/*G:031 But first, how does our Guest contact the Host to ask for privileged
|
|
* operations? There are two ways: the direct way is to make a "hypercall",
|
|
* to make requests of the Host Itself.
|
|
*
|
|
* We use the KVM hypercall mechanism. Eighteen hypercalls are
|
|
* available: the hypercall number is put in the %eax register, and the
|
|
* arguments (when required) are placed in %ebx, %ecx and %edx. If a return
|
|
* value makes sense, it's returned in %eax.
|
|
*
|
|
* Grossly invalid calls result in Sudden Death at the hands of the vengeful
|
|
* Host, rather than returning failure. This reflects Winston Churchill's
|
|
* definition of a gentleman: "someone who is only rude intentionally". */
|
|
/*:*/
|
|
|
|
/* Can't use our min() macro here: needs to be a constant */
|
|
#define LGUEST_IRQS (NR_IRQS < 32 ? NR_IRQS: 32)
|
|
|
|
#define LHCALL_RING_SIZE 64
|
|
struct hcall_args {
|
|
/* These map directly onto eax, ebx, ecx, edx in struct lguest_regs */
|
|
unsigned long arg0, arg1, arg2, arg3;
|
|
};
|
|
|
|
#endif /* !__ASSEMBLY__ */
|
|
#endif /* _ASM_X86_LGUEST_HCALL_H */
|