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[IA64] pvops: introduce pv_cpu_ops to paravirtualize privileged instructions. 

introduce pv_cpu_ops to paravirtualize privleged instructions
which are defined by ia64 intrinsics.
make them indirect C function calls by introducing function
tables, pv_cpu_ops.

Signed-off-by: Yaozu (Eddie) Dong <eddie.dong@intel.com>
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Isaku Yamahata 2008-05-19 22:13:34 +09:00 committed by Tony Luck
parent 3e0879deb7
commit 1ff730b52f
6 changed files with 424 additions and 41 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

247
arch/ia64/kernel/paravirt.c
View File

@ -26,6 +26,7 @@
#include <linux/compiler.h>
#include <linux/io.h>
#include <linux/irq.h>
#include <linux/module.h>
#include <linux/types.h>
#include <asm/iosapic.h>
@ -39,3 +40,249 @@ struct pv_info pv_info = {
.paravirt_enabled = 0,
.name = "bare hardware"
};
/***************************************************************************
* pv_cpu_ops
* intrinsics hooks.
*/
/* ia64_native_xxx are macros so that we have to make them real functions */
#define DEFINE_VOID_FUNC1(name) \
static void \
ia64_native_ ## name ## _func(unsigned long arg) \
{ \
ia64_native_ ## name(arg); \
} \
#define DEFINE_VOID_FUNC2(name) \
static void \
ia64_native_ ## name ## _func(unsigned long arg0, \
unsigned long arg1) \
{ \
ia64_native_ ## name(arg0, arg1); \
} \
#define DEFINE_FUNC0(name) \
static unsigned long \
ia64_native_ ## name ## _func(void) \
{ \
return ia64_native_ ## name(); \
}
#define DEFINE_FUNC1(name, type) \
static unsigned long \
ia64_native_ ## name ## _func(type arg) \
{ \
return ia64_native_ ## name(arg); \
} \
DEFINE_VOID_FUNC1(fc);
DEFINE_VOID_FUNC1(intrin_local_irq_restore);
DEFINE_VOID_FUNC2(ptcga);
DEFINE_VOID_FUNC2(set_rr);
DEFINE_FUNC0(get_psr_i);
DEFINE_FUNC1(thash, unsigned long);
DEFINE_FUNC1(get_cpuid, int);
DEFINE_FUNC1(get_pmd, int);
DEFINE_FUNC1(get_rr, unsigned long);
static void
ia64_native_ssm_i_func(void)
{
ia64_native_ssm(IA64_PSR_I);
}
static void
ia64_native_rsm_i_func(void)
{
ia64_native_rsm(IA64_PSR_I);
}
static void
ia64_native_set_rr0_to_rr4_func(unsigned long val0, unsigned long val1,
unsigned long val2, unsigned long val3,
unsigned long val4)
{
ia64_native_set_rr0_to_rr4(val0, val1, val2, val3, val4);
}
#define CASE_GET_REG(id) \
case _IA64_REG_ ## id: \
res = ia64_native_getreg(_IA64_REG_ ## id); \
break;
#define CASE_GET_AR(id) CASE_GET_REG(AR_ ## id)
#define CASE_GET_CR(id) CASE_GET_REG(CR_ ## id)
unsigned long
ia64_native_getreg_func(int regnum)
{
unsigned long res = -1;
switch (regnum) {
CASE_GET_REG(GP);
CASE_GET_REG(IP);
CASE_GET_REG(PSR);
CASE_GET_REG(TP);
CASE_GET_REG(SP);
CASE_GET_AR(KR0);
CASE_GET_AR(KR1);
CASE_GET_AR(KR2);
CASE_GET_AR(KR3);
CASE_GET_AR(KR4);
CASE_GET_AR(KR5);
CASE_GET_AR(KR6);
CASE_GET_AR(KR7);
CASE_GET_AR(RSC);
CASE_GET_AR(BSP);
CASE_GET_AR(BSPSTORE);
CASE_GET_AR(RNAT);
CASE_GET_AR(FCR);
CASE_GET_AR(EFLAG);
CASE_GET_AR(CSD);
CASE_GET_AR(SSD);
CASE_GET_AR(CFLAG);
CASE_GET_AR(FSR);
CASE_GET_AR(FIR);
CASE_GET_AR(FDR);
CASE_GET_AR(CCV);
CASE_GET_AR(UNAT);
CASE_GET_AR(FPSR);
CASE_GET_AR(ITC);
CASE_GET_AR(PFS);
CASE_GET_AR(LC);
CASE_GET_AR(EC);
CASE_GET_CR(DCR);
CASE_GET_CR(ITM);
CASE_GET_CR(IVA);
CASE_GET_CR(PTA);
CASE_GET_CR(IPSR);
CASE_GET_CR(ISR);
CASE_GET_CR(IIP);
CASE_GET_CR(IFA);
CASE_GET_CR(ITIR);
CASE_GET_CR(IIPA);
CASE_GET_CR(IFS);
CASE_GET_CR(IIM);
CASE_GET_CR(IHA);
CASE_GET_CR(LID);
CASE_GET_CR(IVR);
CASE_GET_CR(TPR);
CASE_GET_CR(EOI);
CASE_GET_CR(IRR0);
CASE_GET_CR(IRR1);
CASE_GET_CR(IRR2);
CASE_GET_CR(IRR3);
CASE_GET_CR(ITV);
CASE_GET_CR(PMV);
CASE_GET_CR(CMCV);
CASE_GET_CR(LRR0);
CASE_GET_CR(LRR1);
default:
printk(KERN_CRIT "wrong_getreg %d\n", regnum);
break;
}
return res;
}
#define CASE_SET_REG(id) \
case _IA64_REG_ ## id: \
ia64_native_setreg(_IA64_REG_ ## id, val); \
break;
#define CASE_SET_AR(id) CASE_SET_REG(AR_ ## id)
#define CASE_SET_CR(id) CASE_SET_REG(CR_ ## id)
void
ia64_native_setreg_func(int regnum, unsigned long val)
{
switch (regnum) {
case _IA64_REG_PSR_L:
ia64_native_setreg(_IA64_REG_PSR_L, val);
ia64_dv_serialize_data();
break;
CASE_SET_REG(SP);
CASE_SET_REG(GP);
CASE_SET_AR(KR0);
CASE_SET_AR(KR1);
CASE_SET_AR(KR2);
CASE_SET_AR(KR3);
CASE_SET_AR(KR4);
CASE_SET_AR(KR5);
CASE_SET_AR(KR6);
CASE_SET_AR(KR7);
CASE_SET_AR(RSC);
CASE_SET_AR(BSP);
CASE_SET_AR(BSPSTORE);
CASE_SET_AR(RNAT);
CASE_SET_AR(FCR);
CASE_SET_AR(EFLAG);
CASE_SET_AR(CSD);
CASE_SET_AR(SSD);
CASE_SET_AR(CFLAG);
CASE_SET_AR(FSR);
CASE_SET_AR(FIR);
CASE_SET_AR(FDR);
CASE_SET_AR(CCV);
CASE_SET_AR(UNAT);
CASE_SET_AR(FPSR);
CASE_SET_AR(ITC);
CASE_SET_AR(PFS);
CASE_SET_AR(LC);
CASE_SET_AR(EC);
CASE_SET_CR(DCR);
CASE_SET_CR(ITM);
CASE_SET_CR(IVA);
CASE_SET_CR(PTA);
CASE_SET_CR(IPSR);
CASE_SET_CR(ISR);
CASE_SET_CR(IIP);
CASE_SET_CR(IFA);
CASE_SET_CR(ITIR);
CASE_SET_CR(IIPA);
CASE_SET_CR(IFS);
CASE_SET_CR(IIM);
CASE_SET_CR(IHA);
CASE_SET_CR(LID);
CASE_SET_CR(IVR);
CASE_SET_CR(TPR);
CASE_SET_CR(EOI);
CASE_SET_CR(IRR0);
CASE_SET_CR(IRR1);
CASE_SET_CR(IRR2);
CASE_SET_CR(IRR3);
CASE_SET_CR(ITV);
CASE_SET_CR(PMV);
CASE_SET_CR(CMCV);
CASE_SET_CR(LRR0);
CASE_SET_CR(LRR1);
default:
printk(KERN_CRIT "wrong setreg %d\n", regnum);
break;
}
}
struct pv_cpu_ops pv_cpu_ops = {
.fc = ia64_native_fc_func,
.thash = ia64_native_thash_func,
.get_cpuid = ia64_native_get_cpuid_func,
.get_pmd = ia64_native_get_pmd_func,
.ptcga = ia64_native_ptcga_func,
.get_rr = ia64_native_get_rr_func,
.set_rr = ia64_native_set_rr_func,
.set_rr0_to_rr4 = ia64_native_set_rr0_to_rr4_func,
.ssm_i = ia64_native_ssm_i_func,
.getreg = ia64_native_getreg_func,
.setreg = ia64_native_setreg_func,
.rsm_i = ia64_native_rsm_i_func,
.get_psr_i = ia64_native_get_psr_i_func,
.intrin_local_irq_restore
= ia64_native_intrin_local_irq_restore_func,
};
EXPORT_SYMBOL(pv_cpu_ops);

2
include/asm-ia64/Kbuild
View File

@ -5,12 +5,12 @@ header-y += fpu.h
header-y += fpswa.h
header-y += ia64regs.h
header-y += intel_intrin.h
header-y += intrinsics.h
header-y += perfmon_default_smpl.h
header-y += ptrace_offsets.h
header-y += rse.h
header-y += ucontext.h
unifdef-y += gcc_intrin.h
unifdef-y += intrinsics.h
unifdef-y += perfmon.h
unifdef-y += ustack.h

24
include/asm-ia64/gcc_intrin.h
View File

@ -32,7 +32,7 @@ extern void ia64_bad_param_for_getreg (void);
register unsigned long ia64_r13 asm ("r13") __used;
#endif
#define ia64_setreg(regnum, val) \
#define ia64_native_setreg(regnum, val) \
({ \
switch (regnum) { \
case _IA64_REG_PSR_L: \
@ -61,7 +61,7 @@ register unsigned long ia64_r13 asm ("r13") __used;
} \
})
#define ia64_getreg(regnum) \
#define ia64_native_getreg(regnum) \
({ \
__u64 ia64_intri_res; \
\
@ -385,7 +385,7 @@ register unsigned long ia64_r13 asm ("r13") __used;
#define ia64_invala() asm volatile ("invala" ::: "memory")
#define ia64_thash(addr) \
#define ia64_native_thash(addr) \
({ \
__u64 ia64_intri_res; \
asm volatile ("thash %0=%1" : "=r"(ia64_intri_res) : "r" (addr)); \
@ -438,10 +438,10 @@ register unsigned long ia64_r13 asm ("r13") __used;
#define ia64_set_pmd(index, val) \
asm volatile ("mov pmd[%0]=%1" :: "r"(index), "r"(val) : "memory")
#define ia64_set_rr(index, val) \
#define ia64_native_set_rr(index, val) \
asm volatile ("mov rr[%0]=%1" :: "r"(index), "r"(val) : "memory");
#define ia64_get_cpuid(index) \
#define ia64_native_get_cpuid(index) \
({ \
__u64 ia64_intri_res; \
asm volatile ("mov %0=cpuid[%r1]" : "=r"(ia64_intri_res) : "rO"(index)); \
@ -477,33 +477,33 @@ register unsigned long ia64_r13 asm ("r13") __used;
})
#define ia64_get_pmd(index) \
#define ia64_native_get_pmd(index) \
({ \
__u64 ia64_intri_res; \
asm volatile ("mov %0=pmd[%1]" : "=r"(ia64_intri_res) : "r"(index)); \
ia64_intri_res; \
})
#define ia64_get_rr(index) \
#define ia64_native_get_rr(index) \
({ \
__u64 ia64_intri_res; \
asm volatile ("mov %0=rr[%1]" : "=r"(ia64_intri_res) : "r" (index)); \
ia64_intri_res; \
})
#define ia64_fc(addr) asm volatile ("fc %0" :: "r"(addr) : "memory")
#define ia64_native_fc(addr) asm volatile ("fc %0" :: "r"(addr) : "memory")
#define ia64_sync_i() asm volatile (";; sync.i" ::: "memory")
#define ia64_ssm(mask) asm volatile ("ssm %0":: "i"((mask)) : "memory")
#define ia64_rsm(mask) asm volatile ("rsm %0":: "i"((mask)) : "memory")
#define ia64_native_ssm(mask) asm volatile ("ssm %0":: "i"((mask)) : "memory")
#define ia64_native_rsm(mask) asm volatile ("rsm %0":: "i"((mask)) : "memory")
#define ia64_sum(mask) asm volatile ("sum %0":: "i"((mask)) : "memory")
#define ia64_rum(mask) asm volatile ("rum %0":: "i"((mask)) : "memory")
#define ia64_ptce(addr) asm volatile ("ptc.e %0" :: "r"(addr))
#define ia64_ptcga(addr, size) \
#define ia64_native_ptcga(addr, size) \
do { \
asm volatile ("ptc.ga %0,%1" :: "r"(addr), "r"(size) : "memory"); \
ia64_dv_serialize_data(); \
@ -608,7 +608,7 @@ do { \
} \
})
#define ia64_intrin_local_irq_restore(x) \
#define ia64_native_intrin_local_irq_restore(x) \
do { \
asm volatile (";; cmp.ne p6,p7=%0,r0;;" \
"(p6) ssm psr.i;" \

41
include/asm-ia64/intel_intrin.h
View File

@ -16,8 +16,8 @@
* intrinsic
*/
#define ia64_getreg __getReg
#define ia64_setreg __setReg
#define ia64_native_getreg __getReg
#define ia64_native_setreg __setReg
#define ia64_hint __hint
#define ia64_hint_pause __hint_pause
@ -39,10 +39,10 @@
#define ia64_invala_fr __invala_fr
#define ia64_nop __nop
#define ia64_sum __sum
#define ia64_ssm __ssm
#define ia64_native_ssm __ssm
#define ia64_rum __rum
#define ia64_rsm __rsm
#define ia64_fc __fc
#define ia64_native_rsm __rsm
#define ia64_native_fc __fc
#define ia64_ldfs __ldfs
#define ia64_ldfd __ldfd
@ -88,16 +88,17 @@
__setIndReg(_IA64_REG_INDR_PMC, index, val)
#define ia64_set_pmd(index, val) \
__setIndReg(_IA64_REG_INDR_PMD, index, val)
#define ia64_set_rr(index, val) \
#define ia64_native_set_rr(index, val) \
__setIndReg(_IA64_REG_INDR_RR, index, val)
#define ia64_get_cpuid(index) __getIndReg(_IA64_REG_INDR_CPUID, index)
#define __ia64_get_dbr(index) __getIndReg(_IA64_REG_INDR_DBR, index)
#define ia64_get_ibr(index) __getIndReg(_IA64_REG_INDR_IBR, index)
#define ia64_get_pkr(index) __getIndReg(_IA64_REG_INDR_PKR, index)
#define ia64_get_pmc(index) __getIndReg(_IA64_REG_INDR_PMC, index)
#define ia64_get_pmd(index) __getIndReg(_IA64_REG_INDR_PMD, index)
#define ia64_get_rr(index) __getIndReg(_IA64_REG_INDR_RR, index)
#define ia64_native_get_cpuid(index) \
__getIndReg(_IA64_REG_INDR_CPUID, index)
#define __ia64_get_dbr(index) __getIndReg(_IA64_REG_INDR_DBR, index)
#define ia64_get_ibr(index) __getIndReg(_IA64_REG_INDR_IBR, index)
#define ia64_get_pkr(index) __getIndReg(_IA64_REG_INDR_PKR, index)
#define ia64_get_pmc(index) __getIndReg(_IA64_REG_INDR_PMC, index)
#define ia64_native_get_pmd(index) __getIndReg(_IA64_REG_INDR_PMD, index)
#define ia64_native_get_rr(index) __getIndReg(_IA64_REG_INDR_RR, index)
#define ia64_srlz_d __dsrlz
#define ia64_srlz_i __isrlz
@ -119,16 +120,16 @@
#define ia64_ld8_acq __ld8_acq
#define ia64_sync_i __synci
#define ia64_thash __thash
#define ia64_ttag __ttag
#define ia64_native_thash __thash
#define ia64_native_ttag __ttag
#define ia64_itcd __itcd
#define ia64_itci __itci
#define ia64_itrd __itrd
#define ia64_itri __itri
#define ia64_ptce __ptce
#define ia64_ptcl __ptcl
#define ia64_ptcg __ptcg
#define ia64_ptcga __ptcga
#define ia64_native_ptcg __ptcg
#define ia64_native_ptcga __ptcga
#define ia64_ptri __ptri
#define ia64_ptrd __ptrd
#define ia64_dep_mi _m64_dep_mi
@ -145,13 +146,13 @@
#define ia64_lfetch_fault __lfetch_fault
#define ia64_lfetch_fault_excl __lfetch_fault_excl
#define ia64_intrin_local_irq_restore(x) \
#define ia64_native_intrin_local_irq_restore(x) \
do { \
if ((x) != 0) { \
ia64_ssm(IA64_PSR_I); \
ia64_native_ssm(IA64_PSR_I); \
ia64_srlz_d(); \
} else { \
ia64_rsm(IA64_PSR_I); \
ia64_native_rsm(IA64_PSR_I); \
} \
} while (0)

60
include/asm-ia64/intrinsics.h
View File

@ -18,15 +18,15 @@
# include <asm/gcc_intrin.h>
#endif
#define ia64_get_psr_i() (ia64_getreg(_IA64_REG_PSR) & IA64_PSR_I)
#define ia64_native_get_psr_i() (ia64_native_getreg(_IA64_REG_PSR) & IA64_PSR_I)
#define ia64_set_rr0_to_rr4(val0, val1, val2, val3, val4) \
do { \
ia64_set_rr(0x0000000000000000UL, (val0)); \
ia64_set_rr(0x2000000000000000UL, (val1)); \
ia64_set_rr(0x4000000000000000UL, (val2)); \
ia64_set_rr(0x6000000000000000UL, (val3)); \
ia64_set_rr(0x8000000000000000UL, (val4)); \
#define ia64_native_set_rr0_to_rr4(val0, val1, val2, val3, val4) \
do { \
ia64_native_set_rr(0x0000000000000000UL, (val0)); \
ia64_native_set_rr(0x2000000000000000UL, (val1)); \
ia64_native_set_rr(0x4000000000000000UL, (val2)); \
ia64_native_set_rr(0x6000000000000000UL, (val3)); \
ia64_native_set_rr(0x8000000000000000UL, (val4)); \
} while (0)
/*
@ -194,4 +194,48 @@ extern long ia64_cmpxchg_called_with_bad_pointer (void);
#endif /* !CONFIG_IA64_DEBUG_CMPXCHG */
#endif
#ifdef __KERNEL__
#include <asm/paravirt_privop.h>
#endif
#ifndef __ASSEMBLY__
#if defined(CONFIG_PARAVIRT) && defined(__KERNEL__)
#define IA64_INTRINSIC_API(name) pv_cpu_ops.name
#define IA64_INTRINSIC_MACRO(name) paravirt_ ## name
#else
#define IA64_INTRINSIC_API(name) ia64_native_ ## name
#define IA64_INTRINSIC_MACRO(name) ia64_native_ ## name
#endif
/************************************************/
/* Instructions paravirtualized for correctness */
/************************************************/
/* fc, thash, get_cpuid, get_pmd, get_eflags, set_eflags */
/* Note that "ttag" and "cover" are also privilege-sensitive; "ttag"
* is not currently used (though it may be in a long-format VHPT system!)
*/
#define ia64_fc IA64_INTRINSIC_API(fc)
#define ia64_thash IA64_INTRINSIC_API(thash)
#define ia64_get_cpuid IA64_INTRINSIC_API(get_cpuid)
#define ia64_get_pmd IA64_INTRINSIC_API(get_pmd)
/************************************************/
/* Instructions paravirtualized for performance */
/************************************************/
#define ia64_ssm IA64_INTRINSIC_MACRO(ssm)
#define ia64_rsm IA64_INTRINSIC_MACRO(rsm)
#define ia64_getreg IA64_INTRINSIC_API(getreg)
#define ia64_setreg IA64_INTRINSIC_API(setreg)
#define ia64_set_rr IA64_INTRINSIC_API(set_rr)
#define ia64_get_rr IA64_INTRINSIC_API(get_rr)
#define ia64_ptcga IA64_INTRINSIC_API(ptcga)
#define ia64_get_psr_i IA64_INTRINSIC_API(get_psr_i)
#define ia64_intrin_local_irq_restore \
IA64_INTRINSIC_API(intrin_local_irq_restore)
#define ia64_set_rr0_to_rr4 IA64_INTRINSIC_API(set_rr0_to_rr4)
#endif /* !__ASSEMBLY__ */
#endif /* _ASM_IA64_INTRINSICS_H */

91
include/asm-ia64/paravirt_privop.h Normal file
View File

@ -0,0 +1,91 @@
/******************************************************************************
* include/asm-ia64/paravirt_privops.h
*
* Copyright (c) 2008 Isaku Yamahata <yamahata at valinux co jp>
* VA Linux Systems Japan K.K.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#ifndef _ASM_IA64_PARAVIRT_PRIVOP_H
#define _ASM_IA64_PARAVIRT_PRIVOP_H
#ifdef CONFIG_PARAVIRT
#ifndef __ASSEMBLY__
#include <linux/types.h>
#include <asm/kregs.h> /* for IA64_PSR_I */
/******************************************************************************
* replacement of intrinsics operations.
*/
struct pv_cpu_ops {
void (*fc)(unsigned long addr);
unsigned long (*thash)(unsigned long addr);
unsigned long (*get_cpuid)(int index);
unsigned long (*get_pmd)(int index);
unsigned long (*getreg)(int reg);
void (*setreg)(int reg, unsigned long val);
void (*ptcga)(unsigned long addr, unsigned long size);
unsigned long (*get_rr)(unsigned long index);
void (*set_rr)(unsigned long index, unsigned long val);
void (*set_rr0_to_rr4)(unsigned long val0, unsigned long val1,
unsigned long val2, unsigned long val3,
unsigned long val4);
void (*ssm_i)(void);
void (*rsm_i)(void);
unsigned long (*get_psr_i)(void);
void (*intrin_local_irq_restore)(unsigned long flags);
};
extern struct pv_cpu_ops pv_cpu_ops;
extern void ia64_native_setreg_func(int regnum, unsigned long val);
extern unsigned long ia64_native_getreg_func(int regnum);
/************************************************/
/* Instructions paravirtualized for performance */
/************************************************/
/* mask for ia64_native_ssm/rsm() must be constant.("i" constraing).
* static inline function doesn't satisfy it. */
#define paravirt_ssm(mask) \
do { \
if ((mask) == IA64_PSR_I) \
pv_cpu_ops.ssm_i(); \
else \
ia64_native_ssm(mask); \
} while (0)
#define paravirt_rsm(mask) \
do { \
if ((mask) == IA64_PSR_I) \
pv_cpu_ops.rsm_i(); \
else \
ia64_native_rsm(mask); \
} while (0)
#endif /* __ASSEMBLY__ */
#else
/* fallback for native case */
#endif /* CONFIG_PARAVIRT */
#endif /* _ASM_IA64_PARAVIRT_PRIVOP_H */