e17f823453
Commit 1d3e53e862 ("x86/entry/64: Refactor IRQ stacks and make them
NMI-safe") added DEBUG_ENTRY_ASSERT_IRQS_OFF macro that acceses eflags
using 'pushfq' instruction when testing for IF bit. On PV Xen guests
looking at IF flag directly will always see it set, resulting in 'ud2'.
Introduce SAVE_FLAGS() macro that will use appropriate save_fl pv op when
running paravirt.
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Juergen Gross <jgross@suse.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Borislav Petkov <bpetkov@suse.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: David Laight <David.Laight@aculab.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Eduardo Valentin <eduval@amazon.com>
Cc: Greg KH <gregkh@linuxfoundation.org>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: aliguori@amazon.com
Cc: daniel.gruss@iaik.tugraz.at
Cc: hughd@google.com
Cc: keescook@google.com
Cc: xen-devel@lists.xenproject.org
Link: https://lkml.kernel.org/r/20171204150604.899457242@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
84 lines
1.8 KiB
C
84 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#ifndef __LINUX_KBUILD_H
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# error "Please do not build this file directly, build asm-offsets.c instead"
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#endif
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#include <asm/ia32.h>
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#define __SYSCALL_64(nr, sym, qual) [nr] = 1,
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static char syscalls_64[] = {
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#include <asm/syscalls_64.h>
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};
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#define __SYSCALL_I386(nr, sym, qual) [nr] = 1,
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static char syscalls_ia32[] = {
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#include <asm/syscalls_32.h>
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};
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#if defined(CONFIG_KVM_GUEST) && defined(CONFIG_PARAVIRT_SPINLOCKS)
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#include <asm/kvm_para.h>
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#endif
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int main(void)
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{
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#ifdef CONFIG_PARAVIRT
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OFFSET(PV_CPU_usergs_sysret64, pv_cpu_ops, usergs_sysret64);
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OFFSET(PV_CPU_swapgs, pv_cpu_ops, swapgs);
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#ifdef CONFIG_DEBUG_ENTRY
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OFFSET(PV_IRQ_save_fl, pv_irq_ops, save_fl);
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#endif
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BLANK();
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#endif
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#if defined(CONFIG_KVM_GUEST) && defined(CONFIG_PARAVIRT_SPINLOCKS)
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OFFSET(KVM_STEAL_TIME_preempted, kvm_steal_time, preempted);
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BLANK();
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#endif
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#define ENTRY(entry) OFFSET(pt_regs_ ## entry, pt_regs, entry)
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ENTRY(bx);
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ENTRY(cx);
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ENTRY(dx);
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ENTRY(sp);
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ENTRY(bp);
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ENTRY(si);
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ENTRY(di);
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ENTRY(r8);
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ENTRY(r9);
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ENTRY(r10);
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ENTRY(r11);
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ENTRY(r12);
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ENTRY(r13);
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ENTRY(r14);
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ENTRY(r15);
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ENTRY(flags);
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BLANK();
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#undef ENTRY
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#define ENTRY(entry) OFFSET(saved_context_ ## entry, saved_context, entry)
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ENTRY(cr0);
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ENTRY(cr2);
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ENTRY(cr3);
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ENTRY(cr4);
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ENTRY(cr8);
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ENTRY(gdt_desc);
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BLANK();
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#undef ENTRY
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OFFSET(TSS_ist, tss_struct, x86_tss.ist);
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OFFSET(TSS_sp0, tss_struct, x86_tss.sp0);
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BLANK();
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#ifdef CONFIG_CC_STACKPROTECTOR
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DEFINE(stack_canary_offset, offsetof(union irq_stack_union, stack_canary));
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BLANK();
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#endif
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DEFINE(__NR_syscall_max, sizeof(syscalls_64) - 1);
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DEFINE(NR_syscalls, sizeof(syscalls_64));
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DEFINE(__NR_syscall_compat_max, sizeof(syscalls_ia32) - 1);
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DEFINE(IA32_NR_syscalls, sizeof(syscalls_ia32));
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return 0;
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}
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