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From: "Andrei Cherechesu (OSS)" To: xen-devel@lists.xenproject.org Cc: S32@nxp.com, andrei.cherechesu@oss.nxp.com, Andrei Cherechesu , Stefano Stabellini , Julien Grall , Bertrand Marquis , Michal Orzel , Volodymyr Babchuk , Julien Grall Subject: [PATCH v3 2/6] xen/arm: vsmc: Enable handling SiP-owned SCMI SMC calls Date: Wed, 18 Dec 2024 12:11:37 +0200 Message-ID: <20241218101142.1552618-3-andrei.cherechesu@oss.nxp.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20241218101142.1552618-1-andrei.cherechesu@oss.nxp.com> References: <20241218101142.1552618-1-andrei.cherechesu@oss.nxp.com> Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: AM0PR02CA0228.eurprd02.prod.outlook.com (2603:10a6:20b:28f::35) To DU0PR04MB9561.eurprd04.prod.outlook.com (2603:10a6:10:312::7) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DU0PR04MB9561:EE_|VI1PR04MB10026:EE_ X-MS-Office365-Filtering-Correlation-Id: 6d762712-821b-475b-d510-08dd1f4c7ab4 X-MS-Exchange-SharedMailbox-RoutingAgent-Processed: True X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|1800799024|366016|52116014|38350700014; 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charset="utf-8" From: Andrei Cherechesu Change the handling of SiP SMC calls to be more generic, instead of directly relying on the `platform_smc()` callback implementation. Try to handle the SiP SMC first through the `platform_smc()` callback (if implemented). If not handled, check if the SCMI layer is available and try to handle it as SCMI message. Signed-off-by: Andrei Cherechesu Reviewed-by: Stefano Stabellini Acked-by: Julien Grall --- xen/arch/arm/vsmc.c | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) diff --git a/xen/arch/arm/vsmc.c b/xen/arch/arm/vsmc.c index f679cced7f..c4d225c45c 100644 --- a/xen/arch/arm/vsmc.c +++ b/xen/arch/arm/vsmc.c @@ -20,6 +20,7 @@ #include #include #include +#include =20 /* Number of functions currently supported by Hypervisor Service. */ #define XEN_SMCCC_FUNCTION_COUNT 3 @@ -224,6 +225,19 @@ static bool handle_sssc(struct cpu_user_regs *regs) } } =20 +/* Secure Calls defined by the Silicon Provider (SiP) */ +static bool handle_sip(struct cpu_user_regs *regs) +{ + /* Firstly, let each platform define custom handling for these SMCs */ + if ( platform_smc(regs) ) + return true; + + if ( scmi_is_enabled() ) + return scmi_handle_smc(regs); + + return false; +} + /* * vsmccc_handle_call() - handle SMC/HVC call according to ARM SMCCC. * returns true if that was valid SMCCC call (even if function number @@ -288,7 +302,7 @@ static bool vsmccc_handle_call(struct cpu_user_regs *re= gs) handled =3D handle_sssc(regs); break; case ARM_SMCCC_OWNER_SIP: - handled =3D platform_smc(regs); + handled =3D handle_sip(regs); break; case ARM_SMCCC_OWNER_TRUSTED_APP ... ARM_SMCCC_OWNER_TRUSTED_APP_E= ND: case ARM_SMCCC_OWNER_TRUSTED_OS ... ARM_SMCCC_OWNER_TRUSTED_OS_END: --=20 2.45.2