---

yaml --- r: 258146 b: refs/heads/master c: 603d1a5 h: refs/heads/master v: v3
git-mirror · Jul 24, 2011 · 800bd14 · 800bd14
1 parent 4184067
commit 800bd14
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Showing 6 changed files with 80 additions and 108 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: bb25b9ba3e33e941dc48048d0a784e6a05e5648a
+refs/heads/master: 603d1a50acf252621a3598618b018b8123aaba64
diff --git a/trunk/arch/s390/include/asm/thread_info.h b/trunk/arch/s390/include/asm/thread_info.h
@@ -94,6 +94,7 @@ static inline struct thread_info *current_thread_info(void)
 #define TIF_SYSCALL_AUDIT	9	/* syscall auditing active */
 #define TIF_SECCOMP		10	/* secure computing */
 #define TIF_SYSCALL_TRACEPOINT	11	/* syscall tracepoint instrumentation */
+#define TIF_SIE			12	/* guest execution active */
 #define TIF_POLLING_NRFLAG	16	/* true if poll_idle() is polling
 					   TIF_NEED_RESCHED */
 #define TIF_31BIT		17	/* 32bit process */
@@ -113,6 +114,7 @@ static inline struct thread_info *current_thread_info(void)
 #define _TIF_SYSCALL_AUDIT	(1<<TIF_SYSCALL_AUDIT)
 #define _TIF_SECCOMP		(1<<TIF_SECCOMP)
 #define _TIF_SYSCALL_TRACEPOINT	(1<<TIF_SYSCALL_TRACEPOINT)
+#define _TIF_SIE		(1<<TIF_SIE)
 #define _TIF_POLLING_NRFLAG	(1<<TIF_POLLING_NRFLAG)
 #define _TIF_31BIT		(1<<TIF_31BIT)
 #define _TIF_SINGLE_STEP	(1<<TIF_FREEZE)

diff --git a/trunk/arch/s390/kernel/entry64.S b/trunk/arch/s390/kernel/entry64.S
@@ -56,15 +56,28 @@ _TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \
 		 _TIF_MCCK_PENDING)
 _TIF_SYSCALL = (_TIF_SYSCALL_TRACE>>8 | _TIF_SYSCALL_AUDIT>>8 | \
 		_TIF_SECCOMP>>8 | _TIF_SYSCALL_TRACEPOINT>>8)
+_TIF_EXIT_SIE = (_TIF_SIGPENDING | _TIF_NEED_RESCHED | _TIF_MCCK_PENDING)
 
 #define BASED(name) name-system_call(%r13)
 
+	.macro SPP newpp
+#if defined(CONFIG_KVM) || defined(CONFIG_KVM_MODULE)
+	tm	__LC_MACHINE_FLAGS+6,0x20	# MACHINE_FLAG_SPP
+	jz	.+8
+	.insn	s,0xb2800000,\newpp
+#endif
+	.endm
+
 	.macro	HANDLE_SIE_INTERCEPT
 #if defined(CONFIG_KVM) || defined(CONFIG_KVM_MODULE)
-	lg	%r3,__LC_SIE_HOOK
-	ltgr	%r3,%r3
+	tm	__TI_flags+6(%r12),_TIF_SIE>>8
 	jz	0f
-	basr	%r14,%r3
+	SPP	__LC_CMF_HPP			# set host id
+	clc	SP_PSW+8(8,%r15),BASED(.Lsie_loop)
+	jl	0f
+	clc	SP_PSW+8(8,%r15),BASED(.Lsie_done)
+	jhe	0f
+	mvc	SP_PSW+8(8,%r15),BASED(.Lsie_loop)
 0:
 #endif
 	.endm
@@ -465,14 +478,14 @@ pgm_check_handler:
 	xc	SP_ILC(4,%r15),SP_ILC(%r15)
 	mvc	SP_PSW(16,%r15),__LC_PGM_OLD_PSW
 	lg	%r12,__LC_THREAD_INFO	# load pointer to thread_info struct
+	HANDLE_SIE_INTERCEPT
 	tm	SP_PSW+1(%r15),0x01	# interrupting from user ?
 	jz	pgm_no_vtime
 	UPDATE_VTIME __LC_EXIT_TIMER,__LC_SYNC_ENTER_TIMER,__LC_USER_TIMER
 	UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
 	mvc	__LC_LAST_UPDATE_TIMER(8),__LC_SYNC_ENTER_TIMER
 	LAST_BREAK
 pgm_no_vtime:
-	HANDLE_SIE_INTERCEPT
 	stg	%r11,SP_ARGS(%r15)
 	lgf	%r3,__LC_PGM_ILC	# load program interruption code
 	lg	%r4,__LC_TRANS_EXC_CODE
@@ -507,14 +520,14 @@ pgm_per_std:
 	CREATE_STACK_FRAME __LC_SAVE_AREA
 	mvc	SP_PSW(16,%r15),__LC_PGM_OLD_PSW
 	lg	%r12,__LC_THREAD_INFO	# load pointer to thread_info struct
+	HANDLE_SIE_INTERCEPT
 	tm	SP_PSW+1(%r15),0x01	# interrupting from user ?
 	jz	pgm_no_vtime2
 	UPDATE_VTIME __LC_EXIT_TIMER,__LC_SYNC_ENTER_TIMER,__LC_USER_TIMER
 	UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
 	mvc	__LC_LAST_UPDATE_TIMER(8),__LC_SYNC_ENTER_TIMER
 	LAST_BREAK
 pgm_no_vtime2:
-	HANDLE_SIE_INTERCEPT
 	lg	%r1,__TI_task(%r12)
 	tm	SP_PSW+1(%r15),0x01	# kernel per event ?
 	jz	kernel_per
@@ -579,14 +592,14 @@ io_int_handler:
 	CREATE_STACK_FRAME __LC_SAVE_AREA+40
 	mvc	SP_PSW(16,%r15),0(%r12)	# move user PSW to stack
 	lg	%r12,__LC_THREAD_INFO	# load pointer to thread_info struct
+	HANDLE_SIE_INTERCEPT
 	tm	SP_PSW+1(%r15),0x01	# interrupting from user ?
 	jz	io_no_vtime
 	UPDATE_VTIME __LC_EXIT_TIMER,__LC_ASYNC_ENTER_TIMER,__LC_USER_TIMER
 	UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
 	mvc	__LC_LAST_UPDATE_TIMER(8),__LC_ASYNC_ENTER_TIMER
 	LAST_BREAK
 io_no_vtime:
-	HANDLE_SIE_INTERCEPT
 	TRACE_IRQS_OFF
 	la	%r2,SP_PTREGS(%r15)	# address of register-save area
 	brasl	%r14,do_IRQ		# call standard irq handler
@@ -714,14 +727,14 @@ ext_int_handler:
 	CREATE_STACK_FRAME __LC_SAVE_AREA+40
 	mvc	SP_PSW(16,%r15),0(%r12)	# move user PSW to stack
 	lg	%r12,__LC_THREAD_INFO	# load pointer to thread_info struct
+	HANDLE_SIE_INTERCEPT
 	tm	SP_PSW+1(%r15),0x01	# interrupting from user ?
 	jz	ext_no_vtime
 	UPDATE_VTIME __LC_EXIT_TIMER,__LC_ASYNC_ENTER_TIMER,__LC_USER_TIMER
 	UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
 	mvc	__LC_LAST_UPDATE_TIMER(8),__LC_ASYNC_ENTER_TIMER
 	LAST_BREAK
 ext_no_vtime:
-	HANDLE_SIE_INTERCEPT
 	TRACE_IRQS_OFF
 	lghi	%r1,4096
 	la	%r2,SP_PTREGS(%r15)	# address of register-save area
@@ -785,6 +798,7 @@ mcck_int_main:
 	lg	%r12,__LC_THREAD_INFO	# load pointer to thread_info struct
 	tm	__LC_MCCK_CODE+2,0x08	# mwp of old psw valid?
 	jno	mcck_no_vtime		# no -> no timer update
+	HANDLE_SIE_INTERCEPT
 	tm	SP_PSW+1(%r15),0x01	# interrupting from user ?
 	jz	mcck_no_vtime
 	UPDATE_VTIME __LC_EXIT_TIMER,__LC_MCCK_ENTER_TIMER,__LC_USER_TIMER
@@ -804,7 +818,6 @@ mcck_no_vtime:
 	stosm	__SF_EMPTY(%r15),0x04	# turn dat on
 	tm	__TI_flags+7(%r12),_TIF_MCCK_PENDING
 	jno	mcck_return
-	HANDLE_SIE_INTERCEPT
 	TRACE_IRQS_OFF
 	brasl	%r14,s390_handle_mcck
 	TRACE_IRQS_ON
@@ -1036,6 +1049,57 @@ cleanup_io_restore_insn:
 .Lcritical_end:
 		.quad	__critical_end
 
+#if defined(CONFIG_KVM) || defined(CONFIG_KVM_MODULE)
+/*
+ * sie64a calling convention:
+ * %r2 pointer to sie control block
+ * %r3 guest register save area
+ */
+	.globl	sie64a
+sie64a:
+	stmg	%r6,%r14,__SF_GPRS(%r15)	# save kernel registers
+	stg	%r2,__SF_EMPTY(%r15)		# save control block pointer
+	stg	%r3,__SF_EMPTY+8(%r15)		# save guest register save area
+	lmg	%r0,%r13,0(%r3)			# load guest gprs 0-13
+	lg	%r14,__LC_THREAD_INFO		# pointer thread_info struct
+	oi	__TI_flags+6(%r14),_TIF_SIE>>8
+sie_loop:
+	lg	%r14,__LC_THREAD_INFO		# pointer thread_info struct
+	tm	__TI_flags+7(%r14),_TIF_EXIT_SIE
+	jnz	sie_exit
+	lg	%r14,__SF_EMPTY(%r15)		# get control block pointer
+	SPP	__SF_EMPTY(%r15)		# set guest id
+	sie	0(%r14)
+sie_done:
+	SPP	__LC_CMF_HPP			# set host id
+	lg	%r14,__LC_THREAD_INFO		# pointer thread_info struct
+sie_exit:
+	ni	__TI_flags+6(%r14),255-(_TIF_SIE>>8)
+	lg	%r14,__SF_EMPTY+8(%r15)		# load guest register save area
+	stmg	%r0,%r13,0(%r14)		# save guest gprs 0-13
+	lmg	%r6,%r14,__SF_GPRS(%r15)	# restore kernel registers
+	lghi	%r2,0
+	br	%r14
+sie_fault:
+	lg	%r14,__LC_THREAD_INFO		# pointer thread_info struct
+	ni	__TI_flags+6(%r14),255-(_TIF_SIE>>8)
+	lg	%r14,__SF_EMPTY+8(%r15)		# load guest register save area
+	stmg	%r0,%r13,0(%r14)		# save guest gprs 0-13
+	lmg	%r6,%r14,__SF_GPRS(%r15)	# restore kernel registers
+	lghi	%r2,-EFAULT
+	br	%r14
+
+	.align	8
+.Lsie_loop:
+	.quad	sie_loop
+.Lsie_done:
+	.quad	sie_done
+
+	.section __ex_table,"a"
+	.quad	sie_loop,sie_fault
+	.previous
+#endif
+
 		.section .rodata, "a"
 #define SYSCALL(esa,esame,emu)	.long esame
 	.globl	sys_call_table

diff --git a/trunk/arch/s390/kernel/s390_ksyms.c b/trunk/arch/s390/kernel/s390_ksyms.c
@@ -1,6 +1,10 @@
 #include <linux/module.h>
+#include <linux/kvm_host.h>
 #include <asm/ftrace.h>
 
 #ifdef CONFIG_FUNCTION_TRACER
 EXPORT_SYMBOL(_mcount);
 #endif
+#if defined(CONFIG_KVM) || defined(CONFIG_KVM_MODULE)
+EXPORT_SYMBOL(sie64a);
+#endif
diff --git a/trunk/arch/s390/kvm/Makefile b/trunk/arch/s390/kvm/Makefile
@@ -10,5 +10,5 @@ common-objs = $(addprefix ../../../virt/kvm/, kvm_main.o)
 
 ccflags-y := -Ivirt/kvm -Iarch/s390/kvm
 
-kvm-objs := $(common-objs) kvm-s390.o sie64a.o intercept.o interrupt.o priv.o sigp.o diag.o
+kvm-objs := $(common-objs) kvm-s390.o intercept.o interrupt.o priv.o sigp.o diag.o
 obj-$(CONFIG_KVM) += kvm.o
diff --git a/trunk/arch/s390/kvm/sie64a.S b/trunk/arch/s390/kvm/sie64a.S