Commit 7d31464a authored by Julien Thierry's avatar Julien Thierry Committed by Catalin Marinas

arm64: Handle serror in NMI context

Per definition of the daifflags, Serrors can occur during any interrupt
context, that includes NMI contexts. Trying to nmi_enter in an nmi context
will crash.

Skip nmi_enter/nmi_exit when serror occurred during an NMI.
Suggested-by: default avatarJames Morse <james.morse@arm.com>
Signed-off-by: default avatarJulien Thierry <julien.thierry@arm.com>
Acked-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Dave Martin <dave.martin@arm.com>
Cc: James Morse <james.morse@arm.com>
Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
parent 101b35f7
......@@ -898,13 +898,17 @@ bool arm64_is_fatal_ras_serror(struct pt_regs *regs, unsigned int esr)
asmlinkage void do_serror(struct pt_regs *regs, unsigned int esr)
{
nmi_enter();
const bool was_in_nmi = in_nmi();
if (!was_in_nmi)
nmi_enter();
/* non-RAS errors are not containable */
if (!arm64_is_ras_serror(esr) || arm64_is_fatal_ras_serror(regs, esr))
arm64_serror_panic(regs, esr);
nmi_exit();
if (!was_in_nmi)
nmi_exit();
}
void __pte_error(const char *file, int line, unsigned long val)
......
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