linux-kernel - [PATCH v3 03/17] firmware: qcom_scm: Remove unused qcom_scm_get

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Date:   Thu, 12 Dec 2019 18:37:00 +0000
From:   Elliot Berman <eberman@...eaurora.org>
To:     bjorn.anderssen@...aro.org, saiprakash.ranjan@...eaurora.org,
        agross@...nel.org, swboyd@...omium.org
Cc:     Elliot Berman <eberman@...eaurora.org>, tsoni@...eaurora.org,
        sidgup@...eaurora.org, psodagud@...eaurora.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v3 03/17] firmware: qcom_scm: Remove unused qcom_scm_get_version

Remove unused qcom_scm_get_version.

Reviewed-by: Bjorn Andersson <bjorn.andersson@...aro.org>
Reviewed-by: Vinod Koul <vkoul@...nel.org>
Reviewed-by: Stephen Boyd <swboyd@...omium.org>
Signed-off-by: Elliot Berman <eberman@...eaurora.org>
---
 drivers/firmware/qcom_scm-32.c | 36 ------------------------------------
 include/linux/qcom_scm.h       |  2 --
 2 files changed, 38 deletions(-)

diff --git a/drivers/firmware/qcom_scm-32.c b/drivers/firmware/qcom_scm-32.c
index 6e62f73..8b57240 100644
--- a/drivers/firmware/qcom_scm-32.c
+++ b/drivers/firmware/qcom_scm-32.c
@@ -292,42 +292,6 @@ static s32 qcom_scm_call_atomic2(u32 svc, u32 cmd, u32 arg1, u32 arg2)
 	return r0;
 }
 
-u32 qcom_scm_get_version(void)
-{
-	int context_id;
-	static u32 version = -1;
-	register u32 r0 asm("r0");
-	register u32 r1 asm("r1");
-
-	if (version != -1)
-		return version;
-
-	mutex_lock(&qcom_scm_lock);
-
-	r0 = 0x1 << 8;
-	r1 = (u32)&context_id;
-	do {
-		asm volatile(
-			__asmeq("%0", "r0")
-			__asmeq("%1", "r1")
-			__asmeq("%2", "r0")
-			__asmeq("%3", "r1")
-#ifdef REQUIRES_SEC
-			".arch_extension sec\n"
-#endif
-			"smc	#0	@ switch to secure world\n"
-			: "=r" (r0), "=r" (r1)
-			: "r" (r0), "r" (r1)
-			: "r2", "r3", "r12");
-	} while (r0 == QCOM_SCM_INTERRUPTED);
-
-	version = r1;
-	mutex_unlock(&qcom_scm_lock);
-
-	return version;
-}
-EXPORT_SYMBOL(qcom_scm_get_version);
-
 /**
  * qcom_scm_set_cold_boot_addr() - Set the cold boot address for cpus
  * @entry: Entry point function for the cpus
diff --git a/include/linux/qcom_scm.h b/include/linux/qcom_scm.h
index d05ddac..6fb23c5 100644
--- a/include/linux/qcom_scm.h
+++ b/include/linux/qcom_scm.h
@@ -78,7 +78,6 @@ extern int qcom_scm_assign_mem(phys_addr_t mem_addr, size_t mem_sz,
 			       const struct qcom_scm_vmperm *newvm,
 			       unsigned int dest_cnt);
 extern void qcom_scm_cpu_power_down(u32 flags);
-extern u32 qcom_scm_get_version(void);
 extern int qcom_scm_set_remote_state(u32 state, u32 id);
 extern bool qcom_scm_restore_sec_cfg_available(void);
 extern int qcom_scm_restore_sec_cfg(u32 device_id, u32 spare);
@@ -118,7 +117,6 @@ static inline int qcom_scm_assign_mem(phys_addr_t mem_addr, size_t mem_sz,
 				      const struct qcom_scm_vmperm *newvm,
 				      unsigned int dest_cnt) { return -ENODEV; }
 static inline void qcom_scm_cpu_power_down(u32 flags) {}
-static inline u32 qcom_scm_get_version(void) { return 0; }
 static inline u32
 qcom_scm_set_remote_state(u32 state,u32 id) { return -ENODEV; }
 static inline int qcom_scm_restore_sec_cfg(u32 device_id, u32 spare) { return -ENODEV; }
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project