mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-25 02:09:42 +00:00
![Peter Zijlstra](/assets/img/avatar_default.png)
The one paravirt read_cr2() implementation (Xen) is actually quite trivial and doesn't need to clobber anything other than the return register. Making read_cr2() CALLEE_SAVE avoids all the PUSH/POP nonsense and allows more convenient use from assembly. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Juergen Gross <jgross@suse.com> Cc: bp@alien8.de Cc: rostedt@goodmis.org Cc: luto@kernel.org Cc: torvalds@linux-foundation.org Cc: hpa@zytor.com Cc: dave.hansen@linux.intel.com Cc: zhe.he@windriver.com Cc: joel@joelfernandes.org Cc: devel@etsukata.com Link: https://lkml.kernel.org/r/20190711114335.887392493@infradead.org
108 lines
3.3 KiB
C
108 lines
3.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Generate definitions needed by assembly language modules.
|
|
* This code generates raw asm output which is post-processed to extract
|
|
* and format the required data.
|
|
*/
|
|
#define COMPILE_OFFSETS
|
|
|
|
#include <linux/crypto.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/stddef.h>
|
|
#include <linux/hardirq.h>
|
|
#include <linux/suspend.h>
|
|
#include <linux/kbuild.h>
|
|
#include <asm/processor.h>
|
|
#include <asm/thread_info.h>
|
|
#include <asm/sigframe.h>
|
|
#include <asm/bootparam.h>
|
|
#include <asm/suspend.h>
|
|
#include <asm/tlbflush.h>
|
|
|
|
#ifdef CONFIG_XEN
|
|
#include <xen/interface/xen.h>
|
|
#endif
|
|
|
|
#ifdef CONFIG_X86_32
|
|
# include "asm-offsets_32.c"
|
|
#else
|
|
# include "asm-offsets_64.c"
|
|
#endif
|
|
|
|
static void __used common(void)
|
|
{
|
|
BLANK();
|
|
OFFSET(TASK_threadsp, task_struct, thread.sp);
|
|
#ifdef CONFIG_STACKPROTECTOR
|
|
OFFSET(TASK_stack_canary, task_struct, stack_canary);
|
|
#endif
|
|
|
|
BLANK();
|
|
OFFSET(TASK_addr_limit, task_struct, thread.addr_limit);
|
|
|
|
BLANK();
|
|
OFFSET(crypto_tfm_ctx_offset, crypto_tfm, __crt_ctx);
|
|
|
|
BLANK();
|
|
OFFSET(pbe_address, pbe, address);
|
|
OFFSET(pbe_orig_address, pbe, orig_address);
|
|
OFFSET(pbe_next, pbe, next);
|
|
|
|
#if defined(CONFIG_X86_32) || defined(CONFIG_IA32_EMULATION)
|
|
BLANK();
|
|
OFFSET(IA32_SIGCONTEXT_ax, sigcontext_32, ax);
|
|
OFFSET(IA32_SIGCONTEXT_bx, sigcontext_32, bx);
|
|
OFFSET(IA32_SIGCONTEXT_cx, sigcontext_32, cx);
|
|
OFFSET(IA32_SIGCONTEXT_dx, sigcontext_32, dx);
|
|
OFFSET(IA32_SIGCONTEXT_si, sigcontext_32, si);
|
|
OFFSET(IA32_SIGCONTEXT_di, sigcontext_32, di);
|
|
OFFSET(IA32_SIGCONTEXT_bp, sigcontext_32, bp);
|
|
OFFSET(IA32_SIGCONTEXT_sp, sigcontext_32, sp);
|
|
OFFSET(IA32_SIGCONTEXT_ip, sigcontext_32, ip);
|
|
|
|
BLANK();
|
|
OFFSET(IA32_RT_SIGFRAME_sigcontext, rt_sigframe_ia32, uc.uc_mcontext);
|
|
#endif
|
|
|
|
#ifdef CONFIG_PARAVIRT_XXL
|
|
BLANK();
|
|
OFFSET(PV_IRQ_irq_disable, paravirt_patch_template, irq.irq_disable);
|
|
OFFSET(PV_IRQ_irq_enable, paravirt_patch_template, irq.irq_enable);
|
|
OFFSET(PV_CPU_iret, paravirt_patch_template, cpu.iret);
|
|
OFFSET(PV_MMU_read_cr2, paravirt_patch_template, mmu.read_cr2);
|
|
#endif
|
|
|
|
#ifdef CONFIG_XEN
|
|
BLANK();
|
|
OFFSET(XEN_vcpu_info_mask, vcpu_info, evtchn_upcall_mask);
|
|
OFFSET(XEN_vcpu_info_pending, vcpu_info, evtchn_upcall_pending);
|
|
OFFSET(XEN_vcpu_info_arch_cr2, vcpu_info, arch.cr2);
|
|
#endif
|
|
|
|
BLANK();
|
|
OFFSET(BP_scratch, boot_params, scratch);
|
|
OFFSET(BP_secure_boot, boot_params, secure_boot);
|
|
OFFSET(BP_loadflags, boot_params, hdr.loadflags);
|
|
OFFSET(BP_hardware_subarch, boot_params, hdr.hardware_subarch);
|
|
OFFSET(BP_version, boot_params, hdr.version);
|
|
OFFSET(BP_kernel_alignment, boot_params, hdr.kernel_alignment);
|
|
OFFSET(BP_init_size, boot_params, hdr.init_size);
|
|
OFFSET(BP_pref_address, boot_params, hdr.pref_address);
|
|
OFFSET(BP_code32_start, boot_params, hdr.code32_start);
|
|
|
|
BLANK();
|
|
DEFINE(PTREGS_SIZE, sizeof(struct pt_regs));
|
|
|
|
/* TLB state for the entry code */
|
|
OFFSET(TLB_STATE_user_pcid_flush_mask, tlb_state, user_pcid_flush_mask);
|
|
|
|
/* Layout info for cpu_entry_area */
|
|
OFFSET(CPU_ENTRY_AREA_entry_stack, cpu_entry_area, entry_stack_page);
|
|
DEFINE(SIZEOF_entry_stack, sizeof(struct entry_stack));
|
|
DEFINE(MASK_entry_stack, (~(sizeof(struct entry_stack) - 1)));
|
|
|
|
/* Offset for fields in tss_struct */
|
|
OFFSET(TSS_sp0, tss_struct, x86_tss.sp0);
|
|
OFFSET(TSS_sp1, tss_struct, x86_tss.sp1);
|
|
OFFSET(TSS_sp2, tss_struct, x86_tss.sp2);
|
|
}
|