mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-21 11:44:01 +08:00
a91d74a3c4
Every so often, after code shuffles, I need to go through and unbitrot the Lguest Journey (see drivers/lguest/README). Since we now use RCU in a simple form in one place I took the opportunity to expand that explanation. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: Ingo Molnar <mingo@redhat.com> Cc: Paul McKenney <paulmck@linux.vnet.ibm.com>
59 lines
1.9 KiB
C
59 lines
1.9 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_PMD 13
|
|
#define LHCALL_SET_PTE 14
|
|
#define LHCALL_SET_PGD 15
|
|
#define LHCALL_LOAD_TLS 16
|
|
#define LHCALL_NOTIFY 17
|
|
#define LHCALL_LOAD_GDT_ENTRY 18
|
|
#define LHCALL_SEND_INTERRUPTS 19
|
|
|
|
#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:030
|
|
* 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, though completely different hypercall
|
|
* numbers. Seventeen hypercalls are available: the hypercall number is put in
|
|
* the %eax register, and the arguments (when required) are placed in %ebx,
|
|
* %ecx, %edx and %esi. 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/esi in struct lguest_regs */
|
|
unsigned long arg0, arg1, arg2, arg3, arg4;
|
|
};
|
|
|
|
#endif /* !__ASSEMBLY__ */
|
|
#endif /* _ASM_X86_LGUEST_HCALL_H */
|