d3561b7fa0
Create a paravirt.h header for all the critical operations which need to be
replaced with hypervisor calls, and include that instead of defining native
operations, when CONFIG_PARAVIRT.
This patch does the dumbest possible replacement of paravirtualized
instructions: calls through a "paravirt_ops" structure. Currently these are
function implementations of native hardware: hypervisors will override the ops
structure with their own variants.
All the pv-ops functions are declared "fastcall" so that a specific
register-based ABI is used, to make inlining assember easier.
And:
+From: Andy Whitcroft <apw@shadowen.org>
The paravirt ops introduce a 'weak' attribute onto memory_setup().
Code ordering leads to the following warnings on x86:
arch/i386/kernel/setup.c:651: warning: weak declaration of
`memory_setup' after first use results in unspecified behavior
Move memory_setup() to avoid this.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Zachary Amsden <zach@vmware.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Andy Whitcroft <apw@shadowen.org>
114 lines
3.5 KiB
C
114 lines
3.5 KiB
C
/*
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* Generate definitions needed by assembly language modules.
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* This code generates raw asm output which is post-processed
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* to extract and format the required data.
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*/
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#include <linux/crypto.h>
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#include <linux/sched.h>
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#include <linux/signal.h>
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#include <linux/personality.h>
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#include <linux/suspend.h>
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#include <asm/ucontext.h>
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#include "sigframe.h"
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#include <asm/fixmap.h>
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#include <asm/processor.h>
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#include <asm/thread_info.h>
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#include <asm/elf.h>
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#include <asm/pda.h>
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#define DEFINE(sym, val) \
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asm volatile("\n->" #sym " %0 " #val : : "i" (val))
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#define BLANK() asm volatile("\n->" : : )
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#define OFFSET(sym, str, mem) \
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DEFINE(sym, offsetof(struct str, mem));
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void foo(void)
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{
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OFFSET(SIGCONTEXT_eax, sigcontext, eax);
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OFFSET(SIGCONTEXT_ebx, sigcontext, ebx);
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OFFSET(SIGCONTEXT_ecx, sigcontext, ecx);
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OFFSET(SIGCONTEXT_edx, sigcontext, edx);
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OFFSET(SIGCONTEXT_esi, sigcontext, esi);
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OFFSET(SIGCONTEXT_edi, sigcontext, edi);
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OFFSET(SIGCONTEXT_ebp, sigcontext, ebp);
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OFFSET(SIGCONTEXT_esp, sigcontext, esp);
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OFFSET(SIGCONTEXT_eip, sigcontext, eip);
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BLANK();
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OFFSET(CPUINFO_x86, cpuinfo_x86, x86);
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OFFSET(CPUINFO_x86_vendor, cpuinfo_x86, x86_vendor);
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OFFSET(CPUINFO_x86_model, cpuinfo_x86, x86_model);
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OFFSET(CPUINFO_x86_mask, cpuinfo_x86, x86_mask);
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OFFSET(CPUINFO_hard_math, cpuinfo_x86, hard_math);
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OFFSET(CPUINFO_cpuid_level, cpuinfo_x86, cpuid_level);
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OFFSET(CPUINFO_x86_capability, cpuinfo_x86, x86_capability);
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OFFSET(CPUINFO_x86_vendor_id, cpuinfo_x86, x86_vendor_id);
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BLANK();
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OFFSET(TI_task, thread_info, task);
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OFFSET(TI_exec_domain, thread_info, exec_domain);
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OFFSET(TI_flags, thread_info, flags);
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OFFSET(TI_status, thread_info, status);
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OFFSET(TI_preempt_count, thread_info, preempt_count);
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OFFSET(TI_addr_limit, thread_info, addr_limit);
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OFFSET(TI_restart_block, thread_info, restart_block);
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OFFSET(TI_sysenter_return, thread_info, sysenter_return);
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BLANK();
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OFFSET(GDS_size, Xgt_desc_struct, size);
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OFFSET(GDS_address, Xgt_desc_struct, address);
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OFFSET(GDS_pad, Xgt_desc_struct, pad);
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BLANK();
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OFFSET(PT_EBX, pt_regs, ebx);
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OFFSET(PT_ECX, pt_regs, ecx);
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OFFSET(PT_EDX, pt_regs, edx);
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OFFSET(PT_ESI, pt_regs, esi);
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OFFSET(PT_EDI, pt_regs, edi);
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OFFSET(PT_EBP, pt_regs, ebp);
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OFFSET(PT_EAX, pt_regs, eax);
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OFFSET(PT_DS, pt_regs, xds);
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OFFSET(PT_ES, pt_regs, xes);
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OFFSET(PT_GS, pt_regs, xgs);
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OFFSET(PT_ORIG_EAX, pt_regs, orig_eax);
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OFFSET(PT_EIP, pt_regs, eip);
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OFFSET(PT_CS, pt_regs, xcs);
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OFFSET(PT_EFLAGS, pt_regs, eflags);
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OFFSET(PT_OLDESP, pt_regs, esp);
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OFFSET(PT_OLDSS, pt_regs, xss);
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BLANK();
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OFFSET(EXEC_DOMAIN_handler, exec_domain, handler);
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OFFSET(RT_SIGFRAME_sigcontext, rt_sigframe, uc.uc_mcontext);
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BLANK();
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OFFSET(pbe_address, pbe, address);
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OFFSET(pbe_orig_address, pbe, orig_address);
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OFFSET(pbe_next, pbe, next);
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/* Offset from the sysenter stack to tss.esp0 */
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DEFINE(TSS_sysenter_esp0, offsetof(struct tss_struct, esp0) -
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sizeof(struct tss_struct));
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DEFINE(PAGE_SIZE_asm, PAGE_SIZE);
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DEFINE(VDSO_PRELINK, VDSO_PRELINK);
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OFFSET(crypto_tfm_ctx_offset, crypto_tfm, __crt_ctx);
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BLANK();
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OFFSET(PDA_cpu, i386_pda, cpu_number);
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OFFSET(PDA_pcurrent, i386_pda, pcurrent);
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#ifdef CONFIG_PARAVIRT
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BLANK();
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OFFSET(PARAVIRT_enabled, paravirt_ops, paravirt_enabled);
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OFFSET(PARAVIRT_irq_disable, paravirt_ops, irq_disable);
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OFFSET(PARAVIRT_irq_enable, paravirt_ops, irq_enable);
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OFFSET(PARAVIRT_irq_enable_sysexit, paravirt_ops, irq_enable_sysexit);
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OFFSET(PARAVIRT_iret, paravirt_ops, iret);
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OFFSET(PARAVIRT_read_cr0, paravirt_ops, read_cr0);
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#endif
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}
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