From 6fe1e64b60269aa58fa00568807738025ae3bd05 Mon Sep 17 00:00:00 2001 From: Srinivas Pandruvada Date: Tue, 15 Nov 2022 18:54:16 -0800 Subject: [PATCH] thermal: intel: Prevent accidental clearing of HFI status When there is a package thermal interrupt with PROCHOT log, it will be processed and cleared. It is possible that there is an active HFI event status, which is about to get processed or getting processed. While clearing PROCHOT log bit, it will also clear HFI status bit. This means that hardware is free to update HFI memory. When clearing a package thermal interrupt, some processors will generate a "general protection fault" when any of the read only bit is set to 1. The driver maintains a mask of all read-write bits which can be set. This mask doesn't include HFI status bit. This bit will also be cleared, as it will be assumed read-only bit. So, add HFI status bit 26 to the mask. Signed-off-by: Srinivas Pandruvada Reviewed-by: Ricardo Neri Signed-off-by: Rafael J. Wysocki --- drivers/thermal/intel/therm_throt.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/thermal/intel/therm_throt.c b/drivers/thermal/intel/therm_throt.c index 8352083b..9e8ab31 100644 --- a/drivers/thermal/intel/therm_throt.c +++ b/drivers/thermal/intel/therm_throt.c @@ -197,7 +197,7 @@ static const struct attribute_group thermal_attr_group = { #define THERM_STATUS_PROCHOT_LOG BIT(1) #define THERM_STATUS_CLEAR_CORE_MASK (BIT(1) | BIT(3) | BIT(5) | BIT(7) | BIT(9) | BIT(11) | BIT(13) | BIT(15)) -#define THERM_STATUS_CLEAR_PKG_MASK (BIT(1) | BIT(3) | BIT(5) | BIT(7) | BIT(9) | BIT(11)) +#define THERM_STATUS_CLEAR_PKG_MASK (BIT(1) | BIT(3) | BIT(5) | BIT(7) | BIT(9) | BIT(11) | BIT(26)) static void clear_therm_status_log(int level) { -- 2.7.4