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Wed, 22 Jun 2022 00:24:14 -0700 (PDT) From: dmitry.semenets@gmail.com To: xen-devel@lists.xenproject.org Cc: Dmytro Semenets , Stefano Stabellini , Julien Grall , Bertrand Marquis , Volodymyr Babchuk Subject: [PATCH] xen: arm: Spin-up cpu instead PSCI CPU OFF Date: Wed, 22 Jun 2022 10:24:10 +0300 Message-Id: <20220622072410.87346-1-dmitry.semenets@gmail.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ZohoMail-DKIM: pass (identity @gmail.com) X-ZM-MESSAGEID: 1655882690120100001 Content-Type: text/plain; charset="utf-8" From: Dmytro Semenets Use spin-up cpu with disabled interrupts instead PSCI CPU OFF halt and reboot procedures. Some platforms can't stop CPU via PSCI because Thrusted OS can't migrate execution to other CPU. Signed-off-by: Dmytro Semenets --- xen/arch/arm/shutdown.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/xen/arch/arm/shutdown.c b/xen/arch/arm/shutdown.c index 3dc6819d56..a9aea19e8e 100644 --- a/xen/arch/arm/shutdown.c +++ b/xen/arch/arm/shutdown.c @@ -8,7 +8,12 @@ =20 static void noreturn halt_this_cpu(void *arg) { - stop_cpu(); + local_irq_disable(); + /* Make sure the write happens before we sleep forever */ + dsb(sy); + isb(); + while ( 1 ) + wfi(); } =20 void machine_halt(void) --=20 2.25.1