|
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [linux-2.6.18-xen] [IA64] Inline xen hyperprivops to eliminate branch call.
# HG changeset patch
# User Alex Williamson <alex.williamson@xxxxxx>
# Date 1183667629 21600
# Node ID b13d92a565ba38cd2101f4d840190d7d116c82a3
# Parent 39a32fbd0abb3194a9769cd16d10b06be69ecbc7
[IA64] Inline xen hyperprivops to eliminate branch call.
Signed-off-by: Isaku Yamahata <yamahata@xxxxxxxxxxxxx>
---
arch/ia64/xen/hypercall.S | 10 ++
include/asm-ia64/privop.h | 3
include/asm-ia64/xen/privop.h | 164 +++++++++++++++++++++++++++++++++++++++++-
3 files changed, 173 insertions(+), 4 deletions(-)
diff -r 39a32fbd0abb -r b13d92a565ba arch/ia64/xen/hypercall.S
--- a/arch/ia64/xen/hypercall.S Thu Jul 05 14:30:44 2007 -0600
+++ b/arch/ia64/xen/hypercall.S Thu Jul 05 14:33:49 2007 -0600
@@ -7,6 +7,13 @@
#include <asm/asmmacro.h>
#include <asm/intrinsics.h>
+#ifdef __INTEL_COMPILER
+# undef ASM_SUPPORTED
+#else
+# define ASM_SUPPORTED
+#endif
+
+#ifndef ASM_SUPPORTED
GLOBAL_ENTRY(xen_get_psr)
XEN_HYPER_GET_PSR
br.ret.sptk.many rp
@@ -113,7 +120,8 @@ GLOBAL_ENTRY(xen_set_eflag)
XEN_HYPER_SET_EFLAG
br.ret.sptk.many rp
END(xen_set_eflag)
-#endif
+#endif /* CONFIG_IA32_SUPPORT */
+#endif /* ASM_SUPPORTED */
GLOBAL_ENTRY(xen_send_ipi)
mov r14=r32
diff -r 39a32fbd0abb -r b13d92a565ba include/asm-ia64/privop.h
--- a/include/asm-ia64/privop.h Thu Jul 05 14:30:44 2007 -0600
+++ b/include/asm-ia64/privop.h Thu Jul 05 14:33:49 2007 -0600
@@ -1,6 +1,9 @@
#ifndef _ASM_IA64_PRIVOP_H
#define _ASM_IA64_PRIVOP_H
+#ifndef _ASM_IA64_INTRINSICS_H
+#error "don't include privop.h directly. instead include intrinsics.h"
+#endif
/*
* Copyright (C) 2005 Hewlett-Packard Co
* Dan Magenheimer <dan.magenheimer@xxxxxx>
diff -r 39a32fbd0abb -r b13d92a565ba include/asm-ia64/xen/privop.h
--- a/include/asm-ia64/xen/privop.h Thu Jul 05 14:30:44 2007 -0600
+++ b/include/asm-ia64/xen/privop.h Thu Jul 05 14:33:49 2007 -0600
@@ -11,6 +11,7 @@
#ifndef __ASSEMBLY__
#include <linux/types.h> /* arch-ia64.h requires uint64_t */
+#include <linux/stringify.h>
#endif
#include <xen/interface/arch-ia64.h>
@@ -77,10 +78,32 @@
* may have different semantics depending on whether they are executed
* at PL0 vs PL!=0. When paravirtualized, these instructions mustn't
* be allowed to execute directly, lest incorrect semantics result. */
-extern unsigned long xen_fc(unsigned long addr);
+#ifdef ASM_SUPPORTED
+static inline void
+xen_fc(unsigned long addr)
+{
+ register __u64 __addr asm ("r8") = addr;
+ asm volatile ("break %0":: "i"(HYPERPRIVOP_FC), "r"(__addr));
+}
+
+static inline unsigned long
+xen_thash(unsigned long addr)
+{
+ register __u64 ia64_intri_res asm ("r8");
+ register __u64 __addr asm ("r8") = addr;
+ asm volatile ("break %1":
+ "=r"(ia64_intri_res):
+ "i"(HYPERPRIVOP_THASH), "0"(__addr));
+ return ia64_intri_res;
+}
+#else
+extern void xen_fc(unsigned long addr);
+extern unsigned long xen_thash(unsigned long addr);
+#endif
+
#define ia64_fc(addr) xen_fc((unsigned long)(addr))
-extern unsigned long xen_thash(unsigned long addr);
#define ia64_thash(addr) xen_thash((unsigned long)(addr))
+
/* Note that "ttag" and "cover" are also privilege-sensitive; "ttag"
* is not currently used (though it may be in a long-format VHPT system!)
* and the semantics of cover only change if psr.ic is off which is very
@@ -88,12 +111,57 @@ extern unsigned long xen_thash(unsigned
/* There are also privilege-sensitive registers. These registers are
* readable at any privilege level but only writable at PL0. */
+#ifdef ASM_SUPPORTED
+static inline unsigned long
+xen_get_cpuid(int index)
+{
+ register __u64 ia64_intri_res asm ("r8");
+ register __u64 __index asm ("r8") = index;
+ asm volatile ("break %1":
+ "=r"(ia64_intri_res):
+ "i"(HYPERPRIVOP_GET_CPUID), "0"(__index));
+ return ia64_intri_res;
+}
+
+static inline unsigned long
+xen_get_pmd(int index)
+{
+ register __u64 ia64_intri_res asm ("r8");
+ register __u64 __index asm ("r8") = index;
+ asm volatile ("break %1":
+ "=r"(ia64_intri_res):
+ "i"(HYPERPRIVOP_GET_PMD), "0O"(__index));
+ return ia64_intri_res;
+}
+#else
extern unsigned long xen_get_cpuid(int index);
+extern unsigned long xen_get_pmd(int index);
+#endif
+
#define ia64_get_cpuid(i) xen_get_cpuid(i)
-extern unsigned long xen_get_pmd(int index);
#define ia64_get_pmd(i) xen_get_pmd(i)
+
+
+#ifdef ASM_SUPPORTED
+static inline unsigned long
+xen_get_eflag(void)
+{
+ register __u64 ia64_intri_res asm ("r8");
+ asm volatile ("break %1":
+ "=r"(ia64_intri_res): "i"(HYPERPRIVOP_GET_EFLAG));
+ return ia64_intri_res;
+}
+
+static inline void
+xen_set_eflag(unsigned long val)
+{
+ register __u64 __val asm ("r8") = val;
+ asm volatile ("break %0":: "i"(HYPERPRIVOP_SET_EFLAG), "r"(__val));
+}
+#else
extern unsigned long xen_get_eflag(void); /* see xen_ia64_getreg */
extern void xen_set_eflag(unsigned long); /* see xen_ia64_setreg */
+#endif
/************************************************/
/* Instructions paravirtualized for performance */
@@ -185,6 +253,7 @@ extern void xen_set_eflag(unsigned long)
* be properly handled by Xen, some are frequent enough that we use
* hyperprivops for performance. */
+#ifndef ASM_SUPPORTED
extern unsigned long xen_get_psr(void);
extern unsigned long xen_get_ivr(void);
extern unsigned long xen_get_tpr(void);
@@ -195,6 +264,95 @@ extern unsigned long xen_get_rr(unsigned
extern unsigned long xen_get_rr(unsigned long index);
extern void xen_set_kr(unsigned long index, unsigned long val);
extern void xen_ptcga(unsigned long addr, unsigned long size);
+#else
+static inline unsigned long
+xen_get_psr(void)
+{
+ register __u64 ia64_intri_res asm ("r8");
+ asm volatile ("break %1":
+ "=r"(ia64_intri_res): "i"(HYPERPRIVOP_GET_PSR));
+ return ia64_intri_res;
+}
+
+static inline unsigned long
+xen_get_ivr(void)
+{
+ register __u64 ia64_intri_res asm ("r8");
+ asm volatile ("break %1":
+ "=r"(ia64_intri_res): "i"(HYPERPRIVOP_GET_IVR));
+ return ia64_intri_res;
+}
+
+static inline unsigned long
+xen_get_tpr(void)
+{
+ register __u64 ia64_intri_res asm ("r8");
+ asm volatile ("break %1":
+ "=r"(ia64_intri_res): "i"(HYPERPRIVOP_GET_TPR));
+ return ia64_intri_res;
+}
+
+static inline void
+xen_set_tpr(unsigned long val)
+{
+ register __u64 __val asm ("r8") = val;
+ asm volatile ("break %0"::
+ "i"(HYPERPRIVOP_GET_TPR), "r"(__val));
+}
+
+static inline void
+xen_eoi(unsigned long val)
+{
+ register __u64 __val asm ("r8") = val;
+ asm volatile ("break %0"::
+ "i"(HYPERPRIVOP_EOI), "r"(__val));
+}
+
+static inline void
+xen_set_itm(unsigned long val)
+{
+ register __u64 __val asm ("r8") = val;
+ asm volatile ("break %0":: "i"(HYPERPRIVOP_SET_ITM), "r"(__val));
+}
+
+static inline void
+xen_ptcga(unsigned long addr, unsigned long size)
+{
+ register __u64 __addr asm ("r8") = addr;
+ register __u64 __size asm ("r9") = size;
+ asm volatile ("break %0"::
+ "i"(HYPERPRIVOP_PTC_GA), "r"(__addr), "r"(__size));
+}
+
+static inline unsigned long
+xen_get_rr(unsigned long index)
+{
+ register __u64 ia64_intri_res asm ("r8");
+ register __u64 __index asm ("r8") = index;
+ asm volatile ("break %1":
+ "=r"(ia64_intri_res):
+ "i"(HYPERPRIVOP_GET_RR), "0"(__index));
+ return ia64_intri_res;
+}
+
+static inline void
+xen_set_rr(unsigned long index, unsigned long val)
+{
+ register __u64 __index asm ("r8") = index;
+ register __u64 __val asm ("r9") = val;
+ asm volatile ("break %0"::
+ "i"(HYPERPRIVOP_SET_RR), "r"(__index), "r"(__val));
+}
+
+static inline void
+xen_set_kr(unsigned long index, unsigned long val)
+{
+ register __u64 __index asm ("r8") = index;
+ register __u64 __val asm ("r9") = val;
+ asm volatile ("break %0"::
+ "i"(HYPERPRIVOP_SET_KR), "r"(__index), "r"(__val));
+}
+#endif
/* Note: It may look wrong to test for is_running_on_xen() in each case.
* However regnum is always a constant so, as written, the compiler
_______________________________________________
Xen-changelog mailing list
Xen-changelog@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-changelog
|
 |
Lists.xenproject.org is hosted with RackSpace, monitoring our |