search for: clbr_any

...\ - if (sizeof(__rettype) > sizeof(unsigned long)) { \ - unsigned long long __tmp; \ - unsigned long __ecx; \ - asm volatile(paravirt_alt(PARAVIRT_CALL) \ - : "=A" (__tmp), "=c" (__ecx) \ - : paravirt_type(__op), \ - paravirt_clobber(CLBR_ANY) \ + rettype __ret; \ + unsigned long __eax, __edx, __ecx; \ + if (sizeof(rettype) > sizeof(unsigned long)) { \ + asm volatile(pre \ + paravirt_alt(PARAVIRT_CALL) \ + post \ + : "=a" (__eax), "=d" (__edx), \ + "=c&quot...

...\ - if (sizeof(__rettype) > sizeof(unsigned long)) { \ - unsigned long long __tmp; \ - unsigned long __ecx; \ - asm volatile(paravirt_alt(PARAVIRT_CALL) \ - : "=A" (__tmp), "=c" (__ecx) \ - : paravirt_type(__op), \ - paravirt_clobber(CLBR_ANY) \ + rettype __ret; \ + unsigned long __eax, __edx, __ecx; \ + if (sizeof(rettype) > sizeof(unsigned long)) { \ + asm volatile(pre \ + paravirt_alt(PARAVIRT_CALL) \ + post \ + : "=a" (__eax), "=d" (__edx), \ + "=c&quot...

...9", "r10", "r11" #define VEXTRA_CLOBBERS , "rax", "r8", "r9", "r10", "r11" @@ -552,12 +552,12 @@ int paravirt_disable_iospace(void); }) #define __PVOP_CALL(rettype, op, pre, post, ...) \ - ____PVOP_CALL(rettype, op, CLBR_ANY, PVOP_CALL_CLOBBERS, \ + ____PVOP_CALL(rettype, op, CLBR_ANY, PVOP_CALL_OUTPUTS, \ EXTRA_CLOBBERS, pre, post, ##__VA_ARGS__) #define __PVOP_CALLEESAVE(rettype, op, pre, post, ...) \ ____PVOP_CALL(rettype, op.func, CLBR_RET_REG, \ - PVOP_CALLEE_CLOBBERS, , \ + PVO...

Hi Andi, This series of patches updates paravirt_ops in various ways. Some of the changes are plain cleanups and improvements, and some add some interfaces necessary for Xen. The brief overview: add-MAINTAINERS.patch - obvious remove-CONFIG_DEBUG_PARAVIRT.patch - no longer needed paravirt-nop.patch - mark nop operations consistently paravirt-pte-accessors.patch - operations to pack/unpack

Hi Andi, This series of patches updates paravirt_ops in various ways. Some of the changes are plain cleanups and improvements, and some add some interfaces necessary for Xen. The brief overview: add-MAINTAINERS.patch - obvious remove-CONFIG_DEBUG_PARAVIRT.patch - no longer needed paravirt-nop.patch - mark nop operations consistently paravirt-pte-accessors.patch - operations to pack/unpack

Hi Andi, Here's a repost of the paravirt_ops update series I posted the other day. Since then, I found a few potential bugs with patching clobbering, cleaned up and documented paravirt.h and the patching machinery. Overview: add-MAINTAINERS.patch obvious remove-CONFIG_DEBUG_PARAVIRT.patch No longer meaningful or needed. paravirt-nop.patch Clean up nop paravirt_ops functions, mainly to

Hi Andi, Here's a repost of the paravirt_ops update series I posted the other day. Since then, I found a few potential bugs with patching clobbering, cleaned up and documented paravirt.h and the patching machinery. Overview: add-MAINTAINERS.patch obvious remove-CONFIG_DEBUG_PARAVIRT.patch No longer meaningful or needed. paravirt-nop.patch Clean up nop paravirt_ops functions, mainly to

OK, this is the revised paravirt.h (Andi has seen this before), then the second is the binary patching stuff. More things get added to the paravirt struct in future patches, but this basic stuff hasn't changed for some time. ==== This patch does the dumbest possible replacement of paravirtualized instructions: calls through a "paravirt_ops" structure. Currently these are function

The following patches introduce the core infrastructure needed to paravirtualize the 32-bit x86 Linux kernel. This is done by moving virtualization sensitive insn's or code paths to a function table, paravirt_ops. This structure can be populated with hypervisor specific calls or native stubs and currently support running on bare metal, VMI, Xen, or Lhype. These patches apply to

The following patches introduce the core infrastructure needed to paravirtualize the 32-bit x86 Linux kernel. This is done by moving virtualization sensitive insn's or code paths to a function table, paravirt_ops. This structure can be populated with hypervisor specific calls or native stubs and currently support running on bare metal, VMI, Xen, or Lhype. These patches apply to

Hi folks, With this series, the bulk of the work of pvops64 is done. Here, I integrate most of the paravirt.c and paravirt.h files, making them applicable to both architectures. CONFIG_PARAVIRT is _not_ present yet. Basically, this code is missing page table integration (patches currently being worked on by Jeremy). Enjoy

Hi folks, With this series, the bulk of the work of pvops64 is done. Here, I integrate most of the paravirt.c and paravirt.h files, making them applicable to both architectures. CONFIG_PARAVIRT is _not_ present yet. Basically, this code is missing page table integration (patches currently being worked on by Jeremy). Enjoy

...\ + sizeof(rettype) > sizeof(unsigned long)) \ + __ret = (rettype)((((u64)__edx) << 32) | __eax); \ + else \ + __ret = (rettype)(__eax & PVOP_RETMASK(rettype)); \ + __ret; \ +}) #define __PVOP_CALL(rettype, op, pre, post, ...) \ ____PVOP_CALL(rettype, op, CLBR_ANY, PVOP_CALL_OUTPUTS, \ @@ -560,11 +565,10 @@ int paravirt_disable_iospace(void); PVOP_VCALL_ARGS; \ PVOP_TEST_NULL(op); \ asm volatile(pre \ - paravirt_alt(PARAVIRT_CALL) \ + PV_SITE(PV_CALL_STR) \ post \ : call_clbr, ASM_CALL_CONSTRAINT...

...eof(rettype) > sizeof(unsigned long)) \ + __ret = (rettype)((((u64)__edx) << 32) | __eax); \ + else \ + __ret = (rettype)(__eax & PVOP_RETMASK(rettype)); \ + __ret; \ +}) + +#define __PVOP_ALT_CALL(rettype, native, op, ...) \ + ____PVOP_ALT_CALL(rettype, native, op, CLBR_ANY, \ + PVOP_CALL_OUTPUTS, EXTRA_CLOBBERS, \ + ##__VA_ARGS__) + +#define __PVOP_ALT_CALLEESAVE(rettype, native, op, ...) \ + ____PVOP_ALT_CALL(rettype, native, op.func, CLBR_RET_REG, \ + PVOP_CALLEE_OUTPUTS, , ##__VA_ARGS__) #define ____PVOP_VCALL(op, clbr, call_clbr, extra...

...3 +#define PARAVIRT_SAVE_FLAGS_IRQ_DISABLE 4 +#define PARAVIRT_INTERRUPT_RETURN 5 +#define PARAVIRT_SYSRETQ 6 +#define PARAVIRT_SWAPGS 7 + +/* Bitmask of what can be clobbered: usually at least rax. */ +#define CLBR_NONE 0x0 +#define CLBR_RAX 0x1 +#define CLBR_RCX 0x2 +#define CLBR_RDX 0x4 +#define CLBR_ANY 0xf + +#ifndef __ASSEMBLY__ +#include <linux/types.h> + +struct thread_struct; +struct desc_struct; +struct desc_ptr; +struct tss_struct; +struct mm_struct; + +struct paravirt_ops +{ + int paravirt_enabled; + + int pgd_alignment; + + const char *name; + char *mem_type; + + unsigned long *vsys...

...3 +#define PARAVIRT_SAVE_FLAGS_IRQ_DISABLE 4 +#define PARAVIRT_INTERRUPT_RETURN 5 +#define PARAVIRT_SYSRETQ 6 +#define PARAVIRT_SWAPGS 7 + +/* Bitmask of what can be clobbered: usually at least rax. */ +#define CLBR_NONE 0x0 +#define CLBR_RAX 0x1 +#define CLBR_RCX 0x2 +#define CLBR_RDX 0x4 +#define CLBR_ANY 0xf + +#ifndef __ASSEMBLY__ +#include <linux/types.h> + +struct thread_struct; +struct desc_struct; +struct desc_ptr; +struct tss_struct; +struct mm_struct; + +struct paravirt_ops +{ + int paravirt_enabled; + + int pgd_alignment; + + const char *name; + char *mem_type; + + unsigned long *vsys...

...atch_default(u8 type, u16 clobbers, void *insnbuf, /* If operation requires a jmp, then jmp */ ret = paravirt_patch_jmp(insnbuf, opfunc, addr, len); else - /* Otherwise call the function; assume target could - clobber any caller-save reg */ - ret = paravirt_patch_call(insnbuf, opfunc, CLBR_ANY, - addr, clobbers, len); + /* Otherwise call the function. */ + ret = paravirt_patch_call(insnbuf, opfunc, addr, len); return ret; } diff --git a/arch/x86/kernel/paravirt_patch_32.c b/arch/x86/kernel/paravirt_patch_32.c index 758e69d72ebf..e5c3a438149e 100644 --- a/arch/x86/kernel/para...

This changes the pv ops code generation to more closely match reality. For example, instead of: callq *0xffffffff81e3a400 (pv_irq_ops.save_fl) vmlinux will now show: pushfq pop %rax nop nop nop nop nop which is what the runtime version of the code will show in most cases. This idea was suggested by Andy Lutomirski. The benefits are: - For the most common runtime cases

This changes the pv ops code generation to more closely match reality. For example, instead of: callq *0xffffffff81e3a400 (pv_irq_ops.save_fl) vmlinux will now show: pushfq pop %rax nop nop nop nop nop which is what the runtime version of the code will show in most cases. This idea was suggested by Andy Lutomirski. The benefits are: - For the most common runtime cases

...avirt_ops+PARAVIRT_irq_disable) #define ENABLE_INTERRUPTS(clobbers) \ PARA_PATCH(PARAVIRT_IRQ_ENABLE, clobbers, \ - pushq %rcx; pushq %rdx; \ - call *%cs:paravirt_ops+PARAVIRT_irq_enable; \ - popq %rdx; popq %rcx) - -#define ENABLE_INTERRUPTS_SYSRETQ \ - PARA_PATCH(PARAVIRT_STI_SYSRETQ, CLBR_ANY, \ - jmp *%cs:paravirt_ops+PARAVIRT_irq_enable_sysexit) + call *%cs:paravirt_ops+PARAVIRT_irq_enable) -#define GET_CR0_INTO_RAX \ - call *paravirt_ops+PARAVIRT_read_cr0 +#define SYSRETQ \ + PARA_PATCH(PARAVIRT_SYSRETQ, CLBR_ANY, \ + jmp *%cs:paravirt_ops+PARAVIRT_sysret) + +#define SWAPGS...