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From: Volodymyr Babchuk <volodymyr_babchuk@epam.com>
To: xen-devel@lists.xen.org
Cc: "Edgar E . Iglesias" <edgar.iglesias@xilinx.com>,
	Stefano Stabellini <sstabellini@kernel.org>,
	Wei Liu <wei.liu2@citrix.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
	George Dunlap <George.Dunlap@eu.citrix.com>,
	Andrew Cooper <andrew.cooper3@citrix.com>,
	Ian Jackson <ian.jackson@eu.citrix.com>, Tim Deegan <tim@xen.org>,
	Julien Grall <julien.grall@arm.com>,
	Jan Beulich <jbeulich@suse.com>,
	Volodymyr Babchuk <volodymyr_babchuk@epam.com>
Subject: [PATCH v7 11/11] public: add and enable XENFEAT_ARM_SMCCC_supported feature
Date: Thu,  5 Oct 2017 00:00:27 +0300	[thread overview]
Message-ID: <1507150827-7858-12-git-send-email-volodymyr_babchuk@epam.com> (raw)
In-Reply-To: <1507150827-7858-1-git-send-email-volodymyr_babchuk@epam.com>

This feature indicates that hypervisor is compatible with ARM
SMC calling convention. Previously hypervisor would inject an
undefined instruction exception if an invalid SMC function were
called or would crash a domain if an invalid HVC function
were invoked.
XENFEAT_ARM_SMCCC_supported feature means that it safe to invoke
SMC/HVC calls that are compatible with SMC calling convention.

Signed-off-by: Volodymyr Babchuk <volodymyr_babchuk@epam.com>
---
 xen/common/kernel.c           | 3 +++
 xen/include/public/features.h | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/xen/common/kernel.c b/xen/common/kernel.c
index 94fdf5c..8d137c5 100644
--- a/xen/common/kernel.c
+++ b/xen/common/kernel.c
@@ -394,6 +394,9 @@ DO(xen_version)(int cmd, XEN_GUEST_HANDLE_PARAM(void) arg)
                     (1U << XENFEAT_auto_translated_physmap);
             if ( is_hardware_domain(d) )
                 fi.submap |= 1U << XENFEAT_dom0;
+#ifdef CONFIG_ARM
+            fi.submap |= (1U << XENFEAT_ARM_SMCCC_supported);
+#endif
 #ifdef CONFIG_X86
             switch ( d->guest_type )
             {
diff --git a/xen/include/public/features.h b/xen/include/public/features.h
index 2110b04..1a989b8 100644
--- a/xen/include/public/features.h
+++ b/xen/include/public/features.h
@@ -102,6 +102,9 @@
 /* Guest can use XENMEMF_vnode to specify virtual node for memory op. */
 #define XENFEAT_memory_op_vnode_supported 13
 
+/* arm: Hypervisor supports ARM SMC calling convention. */
+#define XENFEAT_ARM_SMCCC_supported       14
+
 #define XENFEAT_NR_SUBMAPS 1
 
 #endif /* __XEN_PUBLIC_FEATURES_H__ */
-- 
2.7.4


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  parent reply	other threads:[~2017-10-04 21:00 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-10-04 21:00 [PATCH v7 00/11] Handle SMCs and HVCs in conformance with SMCCC Volodymyr Babchuk
2017-10-04 21:00 ` [PATCH v7 01/11] arm: traps: use only least 32 bits of fid in PSCI handler Volodymyr Babchuk
2017-10-06 13:48   ` Julien Grall
2017-10-04 21:00 ` [PATCH v7 02/11] arm: traps: use generic register accessors in the PSCI code Volodymyr Babchuk
2017-10-04 21:00 ` [PATCH v7 03/11] arm: traps: check if SMC was conditional before handling it Volodymyr Babchuk
2017-10-04 21:00 ` [PATCH v7 04/11] public: xen.h: add definitions for UUID handling Volodymyr Babchuk
2017-10-05 13:03   ` Konrad Rzeszutek Wilk
2017-10-05 14:50     ` Volodymyr Babchuk
2017-10-09  9:40       ` George Dunlap
2017-10-10 15:19         ` Julien Grall
2017-10-10 15:26           ` Volodymyr Babchuk
2017-10-04 21:00 ` [PATCH v7 05/11] arm: processor.h: add definition for immediate value mask Volodymyr Babchuk
2017-10-04 21:00 ` [PATCH v7 06/11] arm: add SMCCC protocol definitions Volodymyr Babchuk
2017-10-04 21:00 ` [PATCH v7 07/11] arm: smccc: handle SMCs according to SMCCC Volodymyr Babchuk
2017-10-04 21:00 ` [PATCH v7 08/11] arm: traps: handle PSCI calls inside `vsmc.c` Volodymyr Babchuk
2017-10-06 13:52   ` Julien Grall
2017-10-04 21:00 ` [PATCH v7 09/11] arm: PSCI: use definitions provided by asm/smccc.h Volodymyr Babchuk
2017-10-06 13:55   ` Julien Grall
2017-10-04 21:00 ` [PATCH v7 10/11] arm: vsmc: remove 64 bit mode check in PSCI handler Volodymyr Babchuk
2017-10-06 14:00   ` Julien Grall
2017-10-09 20:32     ` Stefano Stabellini
2017-10-10 15:14       ` Julien Grall
2017-10-10 15:17   ` Julien Grall
2017-10-04 21:00 ` Volodymyr Babchuk [this message]
2017-10-06 14:01   ` [PATCH v7 11/11] public: add and enable XENFEAT_ARM_SMCCC_supported feature Julien Grall
2017-10-06 14:17     ` Jan Beulich

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