linux-kernel - [PATCH 2/8] habanalabs/gaudi: read div

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

Date:   Sun, 31 Jul 2022 13:50:31 +0300
From:   Oded Gabbay <ogabbay@...nel.org>
To:     linux-kernel@...r.kernel.org
Cc:     Ohad Sharabi <osharabi@...ana.ai>
Subject: [PATCH 2/8] habanalabs/gaudi: read div_sel value from firmware

From: Ohad Sharabi <osharabi@...ana.ai>

Even when running with unsecured f/w, we should read the PLL div_sel
value from the f/w as this register is always privileged.

Signed-off-by: Ohad Sharabi <osharabi@...ana.ai>
Reviewed-by: Oded Gabbay <ogabbay@...nel.org>
Signed-off-by: Oded Gabbay <ogabbay@...nel.org>
---
 drivers/misc/habanalabs/gaudi/gaudi.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/misc/habanalabs/gaudi/gaudi.c b/drivers/misc/habanalabs/gaudi/gaudi.c
index 866dc4b891d6..7f52935dc603 100644
--- a/drivers/misc/habanalabs/gaudi/gaudi.c
+++ b/drivers/misc/habanalabs/gaudi/gaudi.c
@@ -899,12 +899,13 @@ static int gaudi_early_fini(struct hl_device *hdev)
  */
 static int gaudi_fetch_psoc_frequency(struct hl_device *hdev)
 {
-	struct asic_fixed_properties *prop = &hdev->asic_prop;
 	u32 nr = 0, nf = 0, od = 0, div_fctr = 0, pll_clk, div_sel;
+	struct asic_fixed_properties *prop = &hdev->asic_prop;
 	u16 pll_freq_arr[HL_PLL_NUM_OUTPUTS], freq;
 	int rc;
 
-	if (hdev->asic_prop.fw_security_enabled) {
+	if ((hdev->fw_components & FW_TYPE_LINUX) &&
+			(prop->fw_app_cpu_boot_dev_sts0 & CPU_BOOT_DEV_STS0_PLL_INFO_EN)) {
 		struct gaudi_device *gaudi = hdev->asic_specific;
 
 		if (!(gaudi->hw_cap_initialized & HW_CAP_CPU_Q))
-- 
2.25.1