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Commit 8173fc58 authored by Linux Build Service Account's avatar Linux Build Service Account Committed by Gerrit - the friendly Code Review server
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Merge "jtagv8-etm: Add the authentication logic"

parents cd5605e7 fa29447c

drivers/soc/qcom/jtagv8-etm.c

+25 −0
Original line number Diff line number Diff line
@@ -1480,6 +1480,27 @@ static void etm_os_lock_init(struct etm_ctx *etmdata) 
		etmdata->os_lock_present = false;

}



static bool coresight_authstatus_enabled(void __iomem *addr)

{

	int ret;

	unsigned int auth_val;



	if (!addr)

		return false;



	auth_val = readl_relaxed(addr + TRCAUTHSTATUS);



	if ((BMVAL(auth_val, 0, 1) == 0x2) ||

	    (BMVAL(auth_val, 2, 3) == 0x2) ||

	    (BMVAL(auth_val, 4, 5) == 0x2) ||

	    (BMVAL(auth_val, 6, 7) == 0x2))

		ret = false;

	else

		ret = true;



	return ret;

}



static void etm_init_arch_data(void *info)

{

	uint32_t val;
@@ -1487,6 +1508,9 @@ static void etm_init_arch_data(void *info) 


	ETM_UNLOCK(etmdata);



	if (!coresight_authstatus_enabled(etmdata->base))

		goto out;



	etm_os_lock_init(etmdata);



	val = etm_readl(etmdata, TRCIDR1);
@@ -1505,6 +1529,7 @@ static void etm_init_arch_data(void *info) 
	etmdata->nr_seq_state = BMVAL(val, 25, 27);

	etmdata->nr_cntr = BMVAL(val, 28, 30);



out:

	ETM_LOCK(etmdata);

}