diff options
| author |   Juergen Gross <jgross@suse.com> | 2017-11-24 09:42:21 +0100 |
|---|---|---|
| committer |   Thomas Gleixner <tglx@linutronix.de> | 2017-11-28 00:28:56 +0100 |
| commit | 42b3a4cb5609de757f5445fcad18945ba9239a07 (patch) | |
| tree | 84c2436f6e3c08531701fea29d9667cd6bdab520 /arch/x86/mm/extable.c | |
| parent | x86/tlb: Disable interrupts when changing CR4 (diff) | |
| download | linux-dev-42b3a4cb5609de757f5445fcad18945ba9239a07.tar.xz linux-dev-42b3a4cb5609de757f5445fcad18945ba9239a07.zip | |
x86/xen: Support early interrupts in xen pv guests
Add early interrupt handlers activated by idt_setup_early_handler() to
the handlers supported by Xen pv guests. This will allow for early
WARN() calls not crashing the guest.
Suggested-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: xen-devel@lists.xenproject.org
Cc: boris.ostrovsky@oracle.com
Link: https://lkml.kernel.org/r/20171124084221.30172-1-jgross@suse.com
Diffstat (limited to 'arch/x86/mm/extable.c')
| -rw-r--r-- | arch/x86/mm/extable.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/x86/mm/extable.c b/arch/x86/mm/extable.c index 3321b446b66c..88754bfd425f 100644 --- a/arch/x86/mm/extable.c +++ b/arch/x86/mm/extable.c @@ -1,6 +1,7 @@ #include <linux/extable.h> #include <linux/uaccess.h> #include <linux/sched/debug.h> +#include <xen/xen.h> #include <asm/fpu/internal.h> #include <asm/traps.h> @@ -212,8 +213,9 @@ void __init early_fixup_exception(struct pt_regs *regs, int trapnr) * Old CPUs leave the high bits of CS on the stack * undefined. I'm not sure which CPUs do this, but at least * the 486 DX works this way. + * Xen pv domains are not using the default __KERNEL_CS. */ - if (regs->cs != __KERNEL_CS) + if (!xen_pv_domain() && regs->cs != __KERNEL_CS) goto fail; /* |