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[81.231.233.234]) by smtp.gmail.com with ESMTPSA id l133sm3866335lfg.40.2017.01.30.09.21.58 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 30 Jan 2017 09:21:59 -0800 (PST) From: "Edgar E. Iglesias" To: xen-devel@lists.xen.org Date: Mon, 30 Jan 2017 18:21:51 +0100 Message-Id: <1485796915-9372-3-git-send-email-edgar.iglesias@gmail.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1485796915-9372-1-git-send-email-edgar.iglesias@gmail.com> References: <1485796915-9372-1-git-send-email-edgar.iglesias@gmail.com> Cc: edgar.iglesias@xilinx.com, julien.grall@arm.com, sstabellini@kernel.org Subject: [Xen-devel] [RFC v1 2/6] xen/arm: Introduce platform_hvc X-BeenThere: xen-devel@lists.xen.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: "Edgar E. Iglesias" Introduce platform_hvc as a way to handle hypercalls that Xen does not know about in a platform specific way. This is particularly useful for implementing the SiP (SoC implementation specific) service calls. Signed-off-by: Edgar E. Iglesias --- xen/arch/arm/platform.c | 8 ++++++++ xen/arch/arm/traps.c | 3 +++ xen/include/asm-arm/platform.h | 5 +++++ 3 files changed, 16 insertions(+) diff --git a/xen/arch/arm/platform.c b/xen/arch/arm/platform.c index 0af6d57..90ea6b8 100644 --- a/xen/arch/arm/platform.c +++ b/xen/arch/arm/platform.c @@ -127,6 +127,14 @@ void platform_poweroff(void) platform->poweroff(); } +bool platform_hvc(struct cpu_user_regs *regs) +{ + if ( platform && platform->hvc ) + return platform->hvc(regs); + + return false; +} + bool_t platform_has_quirk(uint32_t quirk) { uint32_t quirks = 0; diff --git a/xen/arch/arm/traps.c b/xen/arch/arm/traps.c index a5fbf1e..e8cd111 100644 --- a/xen/arch/arm/traps.c +++ b/xen/arch/arm/traps.c @@ -43,6 +43,7 @@ #include #include #include +#include #include "decode.h" #include "vtimer.h" @@ -1429,6 +1430,8 @@ static void do_trap_psci(struct cpu_user_regs *regs) } break; default: + if ( platform_hvc(regs) ) + return; domain_crash_synchronous(); return; } diff --git a/xen/include/asm-arm/platform.h b/xen/include/asm-arm/platform.h index 08010ba..4d51f0a 100644 --- a/xen/include/asm-arm/platform.h +++ b/xen/include/asm-arm/platform.h @@ -26,6 +26,10 @@ struct platform_desc { void (*reset)(void); /* Platform power-off */ void (*poweroff)(void); + /* Platform specific HVC handler. + * Returns true if the call was handled and false if not. + */ + bool (*hvc)(struct cpu_user_regs *regs); /* * Platform quirks * Defined has a function because a platform can support multiple @@ -55,6 +59,7 @@ int platform_cpu_up(int cpu); #endif void platform_reset(void); void platform_poweroff(void); +bool platform_hvc(struct cpu_user_regs *regs); bool_t platform_has_quirk(uint32_t quirk); bool_t platform_device_is_blacklisted(const struct dt_device_node *node);