From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/arch/x86/include/asm/lguest_hcall.h | 75 ++++++++++++++++++++++++++++++ 1 file changed, 75 insertions(+) create mode 100644 kernel/arch/x86/include/asm/lguest_hcall.h (limited to 'kernel/arch/x86/include/asm/lguest_hcall.h') diff --git a/kernel/arch/x86/include/asm/lguest_hcall.h b/kernel/arch/x86/include/asm/lguest_hcall.h new file mode 100644 index 000000000..ef01fef3e --- /dev/null +++ b/kernel/arch/x86/include/asm/lguest_hcall.h @@ -0,0 +1,75 @@ +/* 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_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 + +/*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. + * + * Our hypercall mechanism uses the highest unused trap code (traps 32 and + * above are used by real hardware interrupts). 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". + */ +static inline unsigned long +hcall(unsigned long call, + unsigned long arg1, unsigned long arg2, unsigned long arg3, + unsigned long arg4) +{ + /* "int" is the Intel instruction to trigger a trap. */ + asm volatile("int $" __stringify(LGUEST_TRAP_ENTRY) + /* The call in %eax (aka "a") might be overwritten */ + : "=a"(call) + /* The arguments are in %eax, %ebx, %ecx, %edx & %esi */ + : "a"(call), "b"(arg1), "c"(arg2), "d"(arg3), "S"(arg4) + /* "memory" means this might write somewhere in memory. + * This isn't true for all calls, but it's safe to tell + * gcc that it might happen so it doesn't get clever. */ + : "memory"); + return call; +} +/*:*/ + +/* 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 */ -- cgit 1.2.3-korg