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Subject[patch 13/26] Xen-paravirt_ops: Consistently wrap paravirt ops callsites to make them patchable
Wrap a set of interesting paravirt_ops calls in a wrapper which makes
the callsites available for patching. Unfortunately this is pretty
ugly because there's no way to get gcc to generate a function call,
but also wrap just the callsite itself with the necessary labels.

This patch supports functions with 0-4 arguments, and either void or
returning a value. 64-bit arguments must be split into a pair of
32-bit arguments (lower word first). Functions which return
structures do so via the stack, with the first hidden argument being
the pointer to the returned structure; this is explicitly visible in
the wrapped calls.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Zachary Amsden <zach@vmware.com>
Cc: Anthony Liguori <anthony@codemonkey.ws>

---
include/asm-i386/paravirt.h | 576 ++++++++++++++++++++++++++++++++-----------
1 file changed, 441 insertions(+), 135 deletions(-)
===================================================================
--- a/include/asm-i386/paravirt.h
+++ b/include/asm-i386/paravirt.h
@@ -37,6 +37,222 @@
#define paravirt_alt(insn_string) \
_paravirt_alt(insn_string, "%c[paravirt_typenum]", "%c[paravirt_clobber]")

+#define PVOP_CALL0(__rettype, __op) \
+ ({ \
+ __rettype __ret; \
+ if (sizeof(__rettype) > sizeof(unsigned long)) { \
+ unsigned long long __tmp; \
+ unsigned long __ecx; \
+ asm volatile(paravirt_alt("call *%[op]") \
+ : "=A" (__tmp), "=c" (__ecx) \
+ : [op] "m" (paravirt_ops.__op), \
+ paravirt_type(PARAVIRT_PATCH(__op)), \
+ paravirt_clobber(CLBR_ANY) \
+ : "memory", "cc"); \
+ __ret = (__rettype)__tmp; \
+ } else { \
+ unsigned long __tmp, __edx, __ecx; \
+ asm volatile(paravirt_alt("call *%[op]") \
+ : "=a" (__tmp), "=d" (__edx), "=c" (__ecx) \
+ : [op] "m" (paravirt_ops.__op), \
+ paravirt_type(PARAVIRT_PATCH(__op)), \
+ paravirt_clobber(CLBR_ANY) \
+ : "memory", "cc"); \
+ __ret = (__rettype)__tmp; \
+ } \
+ __ret; \
+ })
+#define PVOP_VCALL0(__op) \
+ ({ \
+ unsigned long __eax, __edx, __ecx; \
+ asm volatile(paravirt_alt("call *%[op]") \
+ : "=a" (__eax), "=d" (__edx), "=c" (__ecx) \
+ : [op] "m" (paravirt_ops.__op), \
+ paravirt_type(PARAVIRT_PATCH(__op)), \
+ paravirt_clobber(CLBR_ANY) \
+ : "memory", "cc"); \
+ })
+
+#define PVOP_CALL1(__rettype, __op, arg1) \
+ ({ \
+ __rettype __ret; \
+ if (sizeof(__rettype) > sizeof(unsigned long)) { \
+ unsigned long long __tmp; \
+ unsigned long __ecx; \
+ asm volatile(paravirt_alt("call *%[op]") \
+ : "=A" (__tmp), "=c" (__ecx) \
+ : [op] "m" (paravirt_ops.__op), \
+ "a" ((u32)(arg1)), \
+ paravirt_type(PARAVIRT_PATCH(__op)), \
+ paravirt_clobber(CLBR_ANY) \
+ : "memory", "cc"); \
+ __ret = (__rettype)__tmp; \
+ } else { \
+ unsigned long __tmp, __edx, __ecx; \
+ asm volatile(paravirt_alt("call *%[op]") \
+ : "=a" (__tmp), "=d" (__edx), "=c" (__ecx) \
+ : [op] "m" (paravirt_ops.__op), \
+ "0" ((u32)(arg1)), \
+ paravirt_type(PARAVIRT_PATCH(__op)), \
+ paravirt_clobber(CLBR_ANY) \
+ : "memory", "cc"); \
+ __ret = (__rettype)__tmp; \
+ } \
+ __ret; \
+ })
+#define PVOP_VCALL1(__op, arg1) \
+ ({ \
+ unsigned long __eax, __edx, __ecx; \
+ asm volatile(paravirt_alt("call *%[op]") \
+ : "=a" (__eax), "=d" (__edx), "=c" (__ecx) \
+ : [op] "m" (paravirt_ops.__op), \
+ "0" ((u32)(arg1)), \
+ paravirt_type(PARAVIRT_PATCH(__op)), \
+ paravirt_clobber(CLBR_ANY) \
+ : "memory", "cc"); \
+ })
+
+#define PVOP_CALL2(__rettype, __op, arg1, arg2) \
+ ({ \
+ __rettype __ret; \
+ if (sizeof(__rettype) > sizeof(unsigned long)) { \
+ unsigned long long __tmp; \
+ unsigned long __ecx; \
+ asm volatile(paravirt_alt("call *%[op]") \
+ : "=A" (__tmp), "=c" (__ecx) \
+ : [op] "m" (paravirt_ops.__op), \
+ "a" ((u32)(arg1)), \
+ "d" ((u32)(arg2)), \
+ paravirt_type(PARAVIRT_PATCH(__op)), \
+ paravirt_clobber(CLBR_ANY) \
+ : "memory", "cc"); \
+ __ret = (__rettype)__tmp; \
+ } else { \
+ unsigned long __tmp, __edx, __ecx; \
+ asm volatile(paravirt_alt("call *%[op]") \
+ : "=a" (__tmp), "=d" (__edx), "=c" (__ecx) \
+ : [op] "m" (paravirt_ops.__op), \
+ "0" ((u32)(arg1)), \
+ "1" ((u32)(arg2)), \
+ paravirt_type(PARAVIRT_PATCH(__op)), \
+ paravirt_clobber(CLBR_ANY) \
+ : "memory", "cc"); \
+ __ret = (__rettype)__tmp; \
+ } \
+ __ret; \
+ })
+#define PVOP_VCALL2(__op, arg1, arg2) \
+ ({ \
+ unsigned long __eax, __edx, __ecx; \
+ asm volatile(paravirt_alt("call *%[op]") \
+ : "=a" (__eax), "=d" (__edx), "=c" (__ecx) \
+ : [op] "m" (paravirt_ops.__op), \
+ "0" ((u32)(arg1)), \
+ "1" ((u32)(arg2)), \
+ paravirt_type(PARAVIRT_PATCH(__op)), \
+ paravirt_clobber(CLBR_ANY) \
+ : "memory", "cc"); \
+ })
+
+#define PVOP_CALL3(__rettype, __op, arg1, arg2, arg3) \
+ ({ \
+ __rettype __ret; \
+ if (sizeof(__rettype) > sizeof(unsigned long)) { \
+ unsigned long long __tmp; \
+ unsigned long __ecx; \
+ asm volatile(paravirt_alt("call *%[op]") \
+ : "=A" (__tmp), "=c" (__ecx) \
+ : [op] "m" (paravirt_ops.__op), \
+ "a" ((u32)(arg1)), \
+ "d" ((u32)(arg2)), \
+ "1" ((u32)(arg3)), \
+ paravirt_type(PARAVIRT_PATCH(__op)), \
+ paravirt_clobber(CLBR_ANY) \
+ : "memory", "cc"); \
+ __ret = (__rettype)__tmp; \
+ } else { \
+ unsigned long __tmp, __edx, __ecx; \
+ asm volatile(paravirt_alt("call *%[op]") \
+ : "=a" (__tmp), "=d" (__edx), "=c" (__ecx) \
+ : [op] "m" (paravirt_ops.__op), \
+ "0" ((u32)(arg1)), \
+ "1" ((u32)(arg2)), \
+ "2" ((u32)(arg3)), \
+ paravirt_type(PARAVIRT_PATCH(__op)), \
+ paravirt_clobber(CLBR_ANY) \
+ : "memory", "cc"); \
+ __ret = (__rettype)__tmp; \
+ } \
+ __ret; \
+ })
+#define PVOP_VCALL3(__op, arg1, arg2, arg3) \
+ ({ \
+ unsigned long __eax, __edx, __ecx; \
+ asm volatile(paravirt_alt("call *%[op]") \
+ : "=a" (__eax), "=d" (__edx), "=c" (__ecx) \
+ : [op] "m" (paravirt_ops.__op), \
+ "0" ((u32)(arg1)), \
+ "1" ((u32)(arg2)), \
+ "2" ((u32)(arg3)), \
+ paravirt_type(PARAVIRT_PATCH(__op)), \
+ paravirt_clobber(CLBR_ANY) \
+ : "memory", "cc"); \
+ })
+
+#define PVOP_CALL4(__rettype, __op, arg1, arg2, arg3, arg4) \
+ ({ \
+ __rettype __ret; \
+ if (sizeof(__rettype) > sizeof(unsigned long)) { \
+ unsigned long long __tmp; \
+ unsigned long __ecx; \
+ asm volatile("push %[_arg4]; " \
+ paravirt_alt("call *%[op]") \
+ "lea 4(%%esp),%%esp" \
+ : "=A" (__tmp), "=c" (__ecx) \
+ : [op] "m" (paravirt_ops.__op), \
+ "a" ((u32)(arg1)), \
+ "d" ((u32)(arg2)), \
+ "1" ((u32)(arg3)), \
+ [_arg4] "mr" ((u32)(arg4)), \
+ paravirt_type(PARAVIRT_PATCH(__op)), \
+ paravirt_clobber(CLBR_ANY) \
+ : "memory", "cc",); \
+ __ret = (__rettype)__tmp; \
+ } else { \
+ unsigned long __tmp, __edx, __ecx; \
+ asm volatile("push %[_arg4]; " \
+ paravirt_alt("call *%[op]") \
+ "lea 4(%%esp),%%esp" \
+ : "=a" (__tmp), "=d" (__edx), "=c" (__ecx) \
+ : [op] "m" (paravirt_ops.__op), \
+ "0" ((u32)(arg1)), \
+ "1" ((u32)(arg2)), \
+ "2" ((u32)(arg3)), \
+ [_arg4]"mr" ((u32)(arg4)), \
+ paravirt_type(PARAVIRT_PATCH(__op)), \
+ paravirt_clobber(CLBR_ANY) \
+ : "memory", "cc"); \
+ __ret = (__rettype)__tmp; \
+ } \
+ __ret; \
+ })
+#define PVOP_VCALL4(__op, arg1, arg2, arg3, arg4) \
+ ({ \
+ unsigned long __eax, __edx, __ecx; \
+ asm volatile("push %[_arg4]; " \
+ paravirt_alt("call *%[op]") \
+ "lea 4(%%esp),%%esp" \
+ : "=a" (__eax), "=d" (__edx), "=c" (__ecx) \
+ : [op] "m" (paravirt_ops.__op), \
+ "0" ((u32)(arg1)), \
+ "1" ((u32)(arg2)), \
+ "2" ((u32)(arg3)), \
+ [_arg4]"mr" ((u32)(arg4)), \
+ paravirt_type(PARAVIRT_PATCH(__op)), \
+ paravirt_clobber(CLBR_ANY) \
+ : "memory", "cc"); \
+ })
+
struct thread_struct;
struct Xgt_desc_struct;
struct tss_struct;
@@ -119,14 +335,10 @@ struct paravirt_ops
void (*set_ldt)(const void *desc, unsigned entries);
unsigned long (*store_tr)(void);
void (*load_tls)(struct thread_struct *t, unsigned int cpu);
- void (*write_ldt_entry)(void *dt, int entrynum,
- u32 low, u32 high);
- void (*write_gdt_entry)(void *dt, int entrynum,
- u32 low, u32 high);
- void (*write_idt_entry)(void *dt, int entrynum,
- u32 low, u32 high);
- void (*load_esp0)(struct tss_struct *tss,
- struct thread_struct *thread);
+ void (*write_ldt_entry)(void *dt, int entrynum, u32 low, u32 high);
+ void (*write_gdt_entry)(void *dt, int entrynum, u32 low, u32 high);
+ void (*write_idt_entry)(void *dt, int entrynum, u32 low, u32 high);
+ void (*load_esp0)(struct tss_struct *tss, struct thread_struct *thread);

void (*set_iopl_mask)(unsigned mask);

@@ -225,151 +437,165 @@ pgd_t native_make_pgd(unsigned long pgd)
pgd_t native_make_pgd(unsigned long pgd);
#endif

-#define paravirt_enabled() (paravirt_ops.paravirt_enabled)
+static inline int paravirt_enabled(void)
+{
+ return paravirt_ops.paravirt_enabled;
+}

static inline void load_esp0(struct tss_struct *tss,
struct thread_struct *thread)
{
- paravirt_ops.load_esp0(tss, thread);
-}
-
-#define ARCH_SETUP paravirt_ops.arch_setup();
+ PVOP_VCALL2(load_esp0, tss, thread);
+}
+
+#define ARCH_SETUP PVOP_VCALL0(arch_setup);
static inline unsigned long get_wallclock(void)
{
- return paravirt_ops.get_wallclock();
+ return PVOP_CALL0(unsigned long, get_wallclock);
}

static inline int set_wallclock(unsigned long nowtime)
{
- return paravirt_ops.set_wallclock(nowtime);
+ return PVOP_CALL1(int, set_wallclock, nowtime);
}

static inline void do_time_init(void)
{
- return paravirt_ops.time_init();
+ PVOP_VCALL0(time_init);
}

/* The paravirtualized CPUID instruction. */
static inline void __cpuid(unsigned int *eax, unsigned int *ebx,
unsigned int *ecx, unsigned int *edx)
{
- paravirt_ops.cpuid(eax, ebx, ecx, edx);
+ PVOP_VCALL4(cpuid, eax, ebx, ecx, edx);
}

/*
* These special macros can be used to get or set a debugging register
*/
-#define get_debugreg(var, reg) var = paravirt_ops.get_debugreg(reg)
-#define set_debugreg(val, reg) paravirt_ops.set_debugreg(reg, val)
-
-#define clts() paravirt_ops.clts()
-
-#define read_cr0() paravirt_ops.read_cr0()
-#define write_cr0(x) paravirt_ops.write_cr0(x)
-
-#define read_cr2() paravirt_ops.read_cr2()
-#define write_cr2(x) paravirt_ops.write_cr2(x)
-
-#define read_cr3() paravirt_ops.read_cr3()
-#define write_cr3(x) paravirt_ops.write_cr3(x)
-
-#define read_cr4() paravirt_ops.read_cr4()
-#define read_cr4_safe(x) paravirt_ops.read_cr4_safe()
-#define write_cr4(x) paravirt_ops.write_cr4(x)
-
-#define raw_ptep_get_and_clear(xp) (paravirt_ops.ptep_get_and_clear(xp))
+#define get_debugreg(var, reg) var = PVOP_CALL1(unsigned long, get_debugreg, reg)
+#define set_debugreg(val, reg) PVOP_VCALL2(set_debugreg, reg, val)
+
+#define clts() PVOP_VCALL0(clts)
+
+#define read_cr0() PVOP_CALL0(unsigned long, read_cr0)
+#define write_cr0(x) PVOP_VCALL1(write_cr0, x)
+
+#define read_cr2() PVOP_CALL0(unsigned long, read_cr2)
+#define write_cr2(x) PVOP_VCALL1(write_cr2, x)
+
+#define read_cr3() PVOP_CALL0(unsigned long, read_cr3)
+#define write_cr3(x) PVOP_VCALL1(write_cr3, x)
+
+#define read_cr4() PVOP_CALL0(unsigned long, read_cr4)
+#define read_cr4_safe(x) PVOP_CALL0(unsigned long, read_cr4_safe)
+#define write_cr4(x) PVOP_VCALL1(write_cr4, x)

static inline void raw_safe_halt(void)
{
- paravirt_ops.safe_halt();
+ PVOP_VCALL0(safe_halt);
}

static inline void halt(void)
{
- paravirt_ops.safe_halt();
-}
-#define wbinvd() paravirt_ops.wbinvd()
+ PVOP_VCALL0(safe_halt);
+}
+#define wbinvd() PVOP_VCALL0(wbinvd)

#define get_kernel_rpl() (paravirt_ops.kernel_rpl)

#define rdmsr(msr,val1,val2) do { \
int _err; \
- u64 _l = paravirt_ops.read_msr(msr,&_err); \
+ u64 _l = PVOP_CALL2(u64, read_msr, msr, &_err); \
val1 = (u32)_l; \
val2 = _l >> 32; \
} while(0)

-#define wrmsr(msr,val1,val2) do { \
- u64 _l = ((u64)(val2) << 32) | (val1); \
- paravirt_ops.write_msr((msr), _l); \
-} while(0)
+#define wrmsr(msr,val1,val2) PVOP_VCALL3(write_msr, msr, val1, val2)

#define rdmsrl(msr,val) do { \
int _err; \
- val = paravirt_ops.read_msr((msr),&_err); \
+ val = PVOP_CALL2(u64, read_msr, msr, &_err); \
} while(0)

-#define wrmsrl(msr,val) (paravirt_ops.write_msr((msr),(val)))
-#define wrmsr_safe(msr,a,b) ({ \
- u64 _l = ((u64)(b) << 32) | (a); \
- paravirt_ops.write_msr((msr),_l); \
-})
+#define wrmsrl(msr,val) PVOP_CALL3(int, write_msr, msr, val, 0)
+#define wrmsr_safe(msr,a,b) PVOP_CALL3(int, write_msr, msr, a, b)

/* rdmsr with exception handling */
#define rdmsr_safe(msr,a,b) ({ \
int _err; \
- u64 _l = paravirt_ops.read_msr(msr,&_err); \
+ u64 _l = PVOP_CALL2(u64, read_msr, msr, &_err); \
(*a) = (u32)_l; \
(*b) = _l >> 32; \
_err; })

#define rdtsc(low,high) do { \
- u64 _l = paravirt_ops.read_tsc(); \
+ u64 _l = PVOP_CALL0(u64, read_tsc); \
low = (u32)_l; \
high = _l >> 32; \
} while(0)

#define rdtscl(low) do { \
- u64 _l = paravirt_ops.read_tsc(); \
+ u64 _l = PVOP_CALL0(u64, read_tsc); \
low = (int)_l; \
} while(0)

-#define rdtscll(val) (val = paravirt_ops.read_tsc())
+#define rdtscll(val) (val = PVOP_CALL0(u64, read_tsc))

#define write_tsc(val1,val2) wrmsr(0x10, val1, val2)

#define rdpmc(counter,low,high) do { \
- u64 _l = paravirt_ops.read_pmc(); \
+ u64 _l = PVOP_CALL0(u64, read_pmc); \
low = (u32)_l; \
high = _l >> 32; \
} while(0)

-#define load_TR_desc() (paravirt_ops.load_tr_desc())
-#define load_gdt(dtr) (paravirt_ops.load_gdt(dtr))
-#define load_idt(dtr) (paravirt_ops.load_idt(dtr))
-#define set_ldt(addr, entries) (paravirt_ops.set_ldt((addr), (entries)))
-#define store_gdt(dtr) (paravirt_ops.store_gdt(dtr))
-#define store_idt(dtr) (paravirt_ops.store_idt(dtr))
-#define store_tr(tr) ((tr) = paravirt_ops.store_tr())
-#define load_TLS(t,cpu) (paravirt_ops.load_tls((t),(cpu)))
-#define write_ldt_entry(dt, entry, low, high) \
- (paravirt_ops.write_ldt_entry((dt), (entry), (low), (high)))
-#define write_gdt_entry(dt, entry, low, high) \
- (paravirt_ops.write_gdt_entry((dt), (entry), (low), (high)))
-#define write_idt_entry(dt, entry, low, high) \
- (paravirt_ops.write_idt_entry((dt), (entry), (low), (high)))
-#define set_iopl_mask(mask) (paravirt_ops.set_iopl_mask(mask))
-
-#define __pte(x) paravirt_ops.make_pte(x)
-#define __pgd(x) paravirt_ops.make_pgd(x)
-
-#define pte_val(x) paravirt_ops.pte_val(x)
-#define pgd_val(x) paravirt_ops.pgd_val(x)
-
-#ifdef CONFIG_X86_PAE
-#define __pmd(x) paravirt_ops.make_pmd(x)
-#define pmd_val(x) paravirt_ops.pmd_val(x)
-#endif
+static inline void load_TR_desc(void)
+{
+ PVOP_VCALL0(load_tr_desc);
+}
+static inline void load_gdt(const struct Xgt_desc_struct *dtr)
+{
+ PVOP_VCALL1(load_gdt, dtr);
+}
+static inline void load_idt(const struct Xgt_desc_struct *dtr)
+{
+ PVOP_VCALL1(load_idt, dtr);
+}
+static inline void set_ldt(const void *addr, unsigned entries)
+{
+ PVOP_VCALL2(set_ldt, addr, entries);
+}
+static inline void store_gdt(struct Xgt_desc_struct *dtr)
+{
+ PVOP_VCALL1(store_gdt, dtr);
+}
+static inline void store_idt(struct Xgt_desc_struct *dtr)
+{
+ PVOP_VCALL1(store_idt, dtr);
+}
+#define store_tr(tr) ((tr) = PVOP_CALL0(unsigned long, store_tr))
+static inline void load_TLS(struct thread_struct *t, unsigned cpu)
+{
+ PVOP_VCALL2(load_tls, t, cpu);
+}
+static inline void write_ldt_entry(void *dt, int entry, u32 low, u32 high)
+{
+ PVOP_VCALL4(write_ldt_entry, dt, entry, low, high);
+}
+static inline void write_gdt_entry(void *dt, int entry, u32 low, u32 high)
+{
+ PVOP_VCALL4(write_gdt_entry, dt, entry, low, high);
+}
+static inline void write_idt_entry(void *dt, int entry, u32 low, u32 high)
+{
+ PVOP_VCALL4(write_idt_entry, dt, entry, low, high);
+}
+static inline void set_iopl_mask(unsigned mask)
+{
+ PVOP_VCALL1(set_iopl_mask, mask);
+}

/* The paravirtualized I/O functions */
static inline void slow_down_io(void) {
@@ -387,27 +613,27 @@ static inline void slow_down_io(void) {
*/
static inline void apic_write(unsigned long reg, unsigned long v)
{
- paravirt_ops.apic_write(reg,v);
+ PVOP_VCALL2(apic_write, reg, v);
}

static inline void apic_write_atomic(unsigned long reg, unsigned long v)
{
- paravirt_ops.apic_write_atomic(reg,v);
+ PVOP_VCALL2(apic_write_atomic, reg, v);
}

static inline unsigned long apic_read(unsigned long reg)
{
- return paravirt_ops.apic_read(reg);
+ return PVOP_CALL1(unsigned long, apic_read, reg);
}

static inline void setup_boot_clock(void)
{
- paravirt_ops.setup_boot_clock();
+ PVOP_VCALL0(setup_boot_clock);
}

static inline void setup_secondary_clock(void)
{
- paravirt_ops.setup_secondary_clock();
+ PVOP_VCALL0(setup_secondary_clock);
}
#endif

@@ -438,90 +664,170 @@ static inline void startup_ipi_hook(int
static inline void startup_ipi_hook(int phys_apicid, unsigned long start_eip,
unsigned long start_esp)
{
- return paravirt_ops.startup_ipi_hook(phys_apicid, start_eip, start_esp);
+ PVOP_VCALL3(startup_ipi_hook, phys_apicid, start_eip, start_esp);
}
#endif

static inline void paravirt_activate_mm(struct mm_struct *prev,
struct mm_struct *next)
{
- paravirt_ops.activate_mm(prev, next);
+ PVOP_VCALL2(activate_mm, prev, next);
}

static inline void arch_dup_mmap(struct mm_struct *oldmm,
struct mm_struct *mm)
{
- paravirt_ops.dup_mmap(oldmm, mm);
+ PVOP_VCALL2(dup_mmap, oldmm, mm);
}

static inline void arch_exit_mmap(struct mm_struct *mm)
{
- paravirt_ops.exit_mmap(mm);
-}
-
-#define __flush_tlb() paravirt_ops.flush_tlb_user()
-#define __flush_tlb_global() paravirt_ops.flush_tlb_kernel()
-#define __flush_tlb_single(addr) paravirt_ops.flush_tlb_single(addr)
-
-#define paravirt_alloc_pt(pfn) paravirt_ops.alloc_pt(pfn)
-#define paravirt_release_pt(pfn) paravirt_ops.release_pt(pfn)
-
-#define paravirt_alloc_pd(pfn) paravirt_ops.alloc_pd(pfn)
+ PVOP_VCALL1(exit_mmap, mm);
+}
+
+#define __flush_tlb() PVOP_VCALL0(flush_tlb_user)
+#define __flush_tlb_global() PVOP_VCALL0(flush_tlb_kernel)
+#define __flush_tlb_single(addr) PVOP_VCALL1(flush_tlb_single, addr)
+
+#define paravirt_alloc_pt(pfn) PVOP_VCALL1(alloc_pt, pfn)
+#define paravirt_release_pt(pfn) PVOP_VCALL1(release_pt, pfn)
+
+#define paravirt_alloc_pd(pfn) PVOP_VCALL1(alloc_pd, pfn)
#define paravirt_alloc_pd_clone(pfn, clonepfn, start, count) \
- paravirt_ops.alloc_pd_clone(pfn, clonepfn, start, count)
-#define paravirt_release_pd(pfn) paravirt_ops.release_pd(pfn)
+ PVOP_VCALL4(alloc_pd_clone, pfn, clonepfn, start, count)
+#define paravirt_release_pd(pfn) PVOP_VCALL1(release_pd, pfn)
+
+static inline void pte_update(struct mm_struct *mm, u32 addr, pte_t *ptep)
+{
+ PVOP_VCALL3(pte_update, mm, addr, ptep);
+}
+
+static inline void pte_update_defer(struct mm_struct *mm, u32 addr, pte_t *ptep)
+{
+ PVOP_VCALL3(pte_update_defer, mm, addr, ptep);
+}
+
+#ifdef CONFIG_X86_PAE
+static inline pte_t __pte(unsigned long long val)
+{
+ unsigned long long ret = PVOP_CALL2(unsigned long long, make_pte, val, val >> 32);
+ return (pte_t) { ret, ret >> 32 };
+}
+
+static inline pmd_t __pmd(unsigned long long val)
+{
+ return (pmd_t) { PVOP_CALL2(unsigned long long, make_pmd, val, val >> 32) };
+}
+
+static inline pgd_t __pgd(unsigned long long val)
+{
+ return (pgd_t) { PVOP_CALL2(unsigned long long, make_pgd, val, val >> 32) };
+}
+
+static inline unsigned long long pte_val(pte_t x)
+{
+ return PVOP_CALL2(unsigned long long, pte_val, x.pte_low, x.pte_high);
+}
+
+static inline unsigned long long pmd_val(pmd_t x)
+{
+ return PVOP_CALL2(unsigned long long, pmd_val, x.pmd, x.pmd >> 32);
+}
+
+static inline unsigned long long pgd_val(pgd_t x)
+{
+ return PVOP_CALL2(unsigned long long, pgd_val, x.pgd, x.pgd >> 32);
+}

static inline void set_pte(pte_t *ptep, pte_t pteval)
{
- paravirt_ops.set_pte(ptep, pteval);
+ PVOP_VCALL3(set_pte, ptep, pteval.pte_low, pteval.pte_high);
}

static inline void set_pte_at(struct mm_struct *mm, u32 addr, pte_t *ptep, pte_t pteval)
{
+ /* 5 arg words */
paravirt_ops.set_pte_at(mm, addr, ptep, pteval);
}

+static inline void set_pte_atomic(pte_t *ptep, pte_t pteval)
+{
+ PVOP_VCALL3(set_pte_atomic, ptep, pteval.pte_low, pteval.pte_high);
+}
+
+static inline void set_pte_present(struct mm_struct *mm, unsigned long addr,
+ pte_t *ptep, pte_t pte)
+{
+ /* 5 arg words */
+ paravirt_ops.set_pte_present(mm, addr, ptep, pte);
+}
+
static inline void set_pmd(pmd_t *pmdp, pmd_t pmdval)
{
- paravirt_ops.set_pmd(pmdp, pmdval);
-}
-
-static inline void pte_update(struct mm_struct *mm, u32 addr, pte_t *ptep)
-{
- paravirt_ops.pte_update(mm, addr, ptep);
-}
-
-static inline void pte_update_defer(struct mm_struct *mm, u32 addr, pte_t *ptep)
-{
- paravirt_ops.pte_update_defer(mm, addr, ptep);
-}
-
-#ifdef CONFIG_X86_PAE
-static inline void set_pte_atomic(pte_t *ptep, pte_t pteval)
-{
- paravirt_ops.set_pte_atomic(ptep, pteval);
-}
-
-static inline void set_pte_present(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pte)
-{
- paravirt_ops.set_pte_present(mm, addr, ptep, pte);
+ PVOP_VCALL3(set_pmd, pmdp, pmdval.pmd, pmdval.pmd >> 32);
}

static inline void set_pud(pud_t *pudp, pud_t pudval)
{
- paravirt_ops.set_pud(pudp, pudval);
+ PVOP_VCALL3(set_pud, pudp, pudval.pgd.pgd, pudval.pgd.pgd >> 32);
}

static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
{
- paravirt_ops.pte_clear(mm, addr, ptep);
+ PVOP_VCALL3(pte_clear, mm, addr, ptep);
}

static inline void pmd_clear(pmd_t *pmdp)
{
- paravirt_ops.pmd_clear(pmdp);
-}
-#endif
+ PVOP_VCALL1(pmd_clear, pmdp);
+}
+
+static inline pte_t raw_ptep_get_and_clear(pte_t *p)
+{
+ unsigned long long val = PVOP_CALL1(unsigned long long, ptep_get_and_clear, p);
+ return (pte_t) { val, val >> 32 };
+}
+#else /* !CONFIG_X86_PAE */
+static inline pte_t __pte(unsigned long val)
+{
+ return (pte_t) { PVOP_CALL1(unsigned long, make_pte, val) };
+}
+
+static inline pgd_t __pgd(unsigned long val)
+{
+ return (pgd_t) { PVOP_CALL1(unsigned long, make_pgd, val) };
+}
+
+static inline unsigned long pte_val(pte_t x)
+{
+ return PVOP_CALL1(unsigned long, pte_val, x.pte_low);
+}
+
+static inline unsigned long pgd_val(pgd_t x)
+{
+ return PVOP_CALL1(unsigned long, pgd_val, x.pgd);
+}
+
+static inline void set_pte(pte_t *ptep, pte_t pteval)
+{
+ PVOP_VCALL2(set_pte, ptep, pteval.pte_low);
+}
+
+static inline void set_pte_at(struct mm_struct *mm, u32 addr, pte_t *ptep, pte_t pteval)
+{
+ PVOP_VCALL4(set_pte_at, mm, addr, ptep, pteval.pte_low);
+}
+
+static inline void set_pmd(pmd_t *pmdp, pmd_t pmdval)
+{
+ PVOP_VCALL2(set_pmd, pmdp, pmdval.pud.pgd.pgd);
+}
+
+static inline pte_t raw_ptep_get_and_clear(pte_t *p)
+{
+ return (pte_t) { PVOP_CALL1(unsigned long, ptep_get_and_clear, p) };
+}
+#endif /* CONFIG_X86_PAE */

/* Lazy mode for batching updates / context switch */
#define PARAVIRT_LAZY_NONE 0
@@ -529,12 +835,12 @@ static inline void pmd_clear(pmd_t *pmdp
#define PARAVIRT_LAZY_CPU 2

#define __HAVE_ARCH_ENTER_LAZY_CPU_MODE
-#define arch_enter_lazy_cpu_mode() paravirt_ops.set_lazy_mode(PARAVIRT_LAZY_CPU)
-#define arch_leave_lazy_cpu_mode() paravirt_ops.set_lazy_mode(PARAVIRT_LAZY_NONE)
+#define arch_enter_lazy_cpu_mode() PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_CPU)
+#define arch_leave_lazy_cpu_mode() PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_NONE)

#define __HAVE_ARCH_ENTER_LAZY_MMU_MODE
-#define arch_enter_lazy_mmu_mode() paravirt_ops.set_lazy_mode(PARAVIRT_LAZY_MMU)
-#define arch_leave_lazy_mmu_mode() paravirt_ops.set_lazy_mode(PARAVIRT_LAZY_NONE)
+#define arch_enter_lazy_mmu_mode() PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_MMU)
+#define arch_leave_lazy_mmu_mode() PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_NONE)

void _paravirt_nop(void);
#define paravirt_nop ((void *)_paravirt_nop)
--

-
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  Last update: 2007-02-27 09:43    [from the cache]
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