From: Wei Chen <Wei.Chen@arm.com>
To: xen-devel@lists.xen.org
Cc: sstabellini@kernel.org, wei.chen@arm.com, steve.capper@arm.com,
Kaly.Xin@arm.com, julien.grall@arm.com, nd@arm.com
Subject: [PATCH v2 18/19] xen/arm: Prevent slipping hypervisor SError to guest
Date: Thu, 30 Mar 2017 17:13:28 +0800 [thread overview]
Message-ID: <1490865209-18283-19-git-send-email-Wei.Chen@arm.com> (raw)
In-Reply-To: <1490865209-18283-1-git-send-email-Wei.Chen@arm.com>
If there is a pending SError while we're returning from trap. If the
SError handle option is "DIVERSE", we have to prevent slipping this
hypervisor SError to guest. So we have to use the dsb/isb to guarantee
that the pending hypervisor SError would be caught in hypervisor before
return to guest.
Signed-off-by: Wei Chen <Wei.Chen@arm.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
---
xen/arch/arm/traps.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/xen/arch/arm/traps.c b/xen/arch/arm/traps.c
index 9b4546e..f3d794e 100644
--- a/xen/arch/arm/traps.c
+++ b/xen/arch/arm/traps.c
@@ -2926,6 +2926,16 @@ asmlinkage void leave_hypervisor_tail(void)
local_irq_disable();
if (!softirq_pending(smp_processor_id())) {
gic_inject();
+
+ /*
+ * If the SErrors handle option is "DIVERSE", we have to prevent
+ * slipping the hypervisor SError to guest. So before returning
+ * from trap, we use the synchronize_serror to guarantee that the
+ * pending SError would be caught in hypervisor.
+ */
+ if ( serrors_op == SERRORS_DIVERSE )
+ synchronize_serror();
+
return;
}
local_irq_enable();
--
2.7.4
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next prev parent reply other threads:[~2017-03-30 9:13 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-30 9:13 [PATCH v2 00/19] Provide a command line option to choose how to handle SErrors Wei Chen
2017-03-30 9:13 ` [PATCH v2 01/19] xen/arm: Save ESR_EL2 to avoid using mismatched value in syndrome check Wei Chen
2017-03-30 13:31 ` Julien Grall
2017-03-31 3:26 ` Wei Chen
2017-03-30 9:13 ` [PATCH v2 02/19] xen/arm: Remove vwfi while setting HCR_EL2 in init_traps Wei Chen
2017-03-30 17:05 ` Julien Grall
2017-03-30 22:29 ` Stefano Stabellini
2017-03-31 5:58 ` Wei Chen
2017-03-31 8:34 ` Julien Grall
2017-03-30 9:13 ` [PATCH v2 03/19] xen/arm: Move parse_vwfi from trap.c to domain.c Wei Chen
2017-03-30 9:13 ` [PATCH v2 04/19] xen/arm: Restore HCR_EL2 register Wei Chen
2017-03-30 17:07 ` Julien Grall
2017-03-30 22:03 ` Stefano Stabellini
2017-03-31 2:10 ` Wei Chen
2017-03-31 8:39 ` Julien Grall
2017-03-31 8:59 ` Wei Chen
2017-03-30 9:13 ` [PATCH v2 05/19] xen/arm: Avoid setting/clearing HCR_RW at every context switch Wei Chen
2017-03-30 17:12 ` Julien Grall
2017-03-30 21:21 ` Stefano Stabellini
2017-03-30 9:13 ` [PATCH v2 06/19] xen/arm: Save HCR_EL2 when a guest took the SError Wei Chen
2017-03-30 9:13 ` [PATCH v2 07/19] xen/arm: Introduce a virtual abort injection helper Wei Chen
2017-03-30 17:20 ` Julien Grall
2017-03-30 21:24 ` Stefano Stabellini
2017-03-31 5:25 ` Wei Chen
2017-03-30 9:13 ` [PATCH v2 08/19] xen/arm: Introduce a command line parameter for SErrors/Aborts Wei Chen
2017-03-30 17:39 ` Julien Grall
2017-03-31 5:28 ` Wei Chen
2017-03-30 9:13 ` [PATCH v2 09/19] xen/arm: Introduce a initcall to update cpu_hwcaps by serror_op Wei Chen
2017-03-30 17:51 ` Julien Grall
2017-03-30 18:02 ` Julien Grall
2017-03-30 21:28 ` Stefano Stabellini
2017-03-31 8:50 ` Julien Grall
2017-03-30 9:13 ` [PATCH v2 10/19] xen/arm64: Use alternative to skip the check of pending serrors Wei Chen
2017-03-30 9:13 ` [PATCH v2 11/19] xen/arm32: " Wei Chen
2017-03-30 18:06 ` Julien Grall
2017-03-30 21:29 ` Stefano Stabellini
2017-03-31 5:33 ` Wei Chen
2017-03-30 9:13 ` [PATCH v2 12/19] xen/arm: Move macro VABORT_GEN_BY_GUEST to common header Wei Chen
2017-03-30 21:36 ` Stefano Stabellini
2017-03-31 5:35 ` Wei Chen
2017-03-30 9:13 ` [PATCH v2 13/19] xen/arm: Introduce new helpers to handle guest/hyp SErrors Wei Chen
2017-03-30 9:13 ` [PATCH v2 14/19] xen/arm: Replace do_trap_guest_serror with new helpers Wei Chen
2017-03-30 9:13 ` [PATCH v2 15/19] xen/arm: Unmask the Abort/SError bit in the exception entries Wei Chen
2017-03-30 9:13 ` [PATCH v2 16/19] xen/arm: Introduce a helper to synchronize SError Wei Chen
2017-03-30 18:28 ` Julien Grall
2017-03-30 18:32 ` Julien Grall
2017-03-30 18:37 ` Julien Grall
2017-03-31 5:51 ` Wei Chen
2017-03-31 10:55 ` Wei Chen
2017-03-31 11:06 ` Julien Grall
2017-03-31 11:09 ` Wei Chen
2017-03-30 9:13 ` [PATCH v2 17/19] xen/arm: Isolate the SError between the context switch of 2 vCPUs Wei Chen
2017-03-30 21:49 ` Stefano Stabellini
2017-03-30 22:00 ` Julien Grall
2017-03-31 5:52 ` Wei Chen
2017-03-30 9:13 ` Wei Chen [this message]
2017-03-30 9:13 ` [PATCH v2 19/19] xen/arm: Handle guest external abort as guest SError Wei Chen
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