1 files changed, 72 insertions, 42 deletions

diff --git a/arch/powerpc/platforms/powernv/setup.c b/arch/powerpc/platforms/powernv/setup.c
index 092715b9674b..ef8c9ce53a61 100644
--- a/arch/powerpc/platforms/powernv/setup.c
+++ b/arch/powerpc/platforms/powernv/setup.c
@@ -38,57 +38,92 @@
 #include <asm/smp.h>
 #include <asm/tm.h>
 #include <asm/setup.h>
+#include <asm/security_features.h>
 
 #include "powernv.h"
 
+
+static bool fw_feature_is(const char *state, const char *name,
+			  struct device_node *fw_features)
+{
+	struct device_node *np;
+	bool rc = false;
+
+	np = of_get_child_by_name(fw_features, name);
+	if (np) {
+		rc = of_property_read_bool(np, state);
+		of_node_put(np);
+	}
+
+	return rc;
+}
+
+static void init_fw_feat_flags(struct device_node *np)
+{
+	if (fw_feature_is("enabled", "inst-spec-barrier-ori31,31,0", np))
+		security_ftr_set(SEC_FTR_SPEC_BAR_ORI31);
+
+	if (fw_feature_is("enabled", "fw-bcctrl-serialized", np))
+		security_ftr_set(SEC_FTR_BCCTRL_SERIALISED);
+
+	if (fw_feature_is("enabled", "inst-l1d-flush-ori30,30,0", np))
+		security_ftr_set(SEC_FTR_L1D_FLUSH_ORI30);
+
+	if (fw_feature_is("enabled", "inst-l1d-flush-trig2", np))
+		security_ftr_set(SEC_FTR_L1D_FLUSH_TRIG2);
+
+	if (fw_feature_is("enabled", "fw-l1d-thread-split", np))
+		security_ftr_set(SEC_FTR_L1D_THREAD_PRIV);
+
+	if (fw_feature_is("enabled", "fw-count-cache-disabled", np))
+		security_ftr_set(SEC_FTR_COUNT_CACHE_DISABLED);
+
+	/*
+	 * The features below are enabled by default, so we instead look to see
+	 * if firmware has *disabled* them, and clear them if so.
+	 */
+	if (fw_feature_is("disabled", "speculation-policy-favor-security", np))
+		security_ftr_clear(SEC_FTR_FAVOUR_SECURITY);
+
+	if (fw_feature_is("disabled", "needs-l1d-flush-msr-pr-0-to-1", np))
+		security_ftr_clear(SEC_FTR_L1D_FLUSH_PR);
+
+	if (fw_feature_is("disabled", "needs-l1d-flush-msr-hv-1-to-0", np))
+		security_ftr_clear(SEC_FTR_L1D_FLUSH_HV);
+
+	if (fw_feature_is("disabled", "needs-spec-barrier-for-bound-checks", np))
+		security_ftr_clear(SEC_FTR_BNDS_CHK_SPEC_BAR);
+}
+
 static void pnv_setup_rfi_flush(void)
 {
 	struct device_node *np, *fw_features;
 	enum l1d_flush_type type;
-	int enable;
+	bool enable;
 
 	/* Default to fallback in case fw-features are not available */
 	type = L1D_FLUSH_FALLBACK;
-	enable = 1;
 
 	np = of_find_node_by_name(NULL, "ibm,opal");
 	fw_features = of_get_child_by_name(np, "fw-features");
 	of_node_put(np);
 
 	if (fw_features) {
-		np = of_get_child_by_name(fw_features, "inst-l1d-flush-trig2");
-		if (np && of_property_read_bool(np, "enabled"))
-			type = L1D_FLUSH_MTTRIG;
+		init_fw_feat_flags(fw_features);
+		of_node_put(fw_features);
 
-		of_node_put(np);
+		if (security_ftr_enabled(SEC_FTR_L1D_FLUSH_TRIG2))
+			type = L1D_FLUSH_MTTRIG;
 
-		np = of_get_child_by_name(fw_features, "inst-l1d-flush-ori30,30,0");
-		if (np && of_property_read_bool(np, "enabled"))
+		if (security_ftr_enabled(SEC_FTR_L1D_FLUSH_ORI30))
 			type = L1D_FLUSH_ORI;
-
-		of_node_put(np);
-
-		/* Enable unless firmware says NOT to */
-		enable = 2;
-		np = of_get_child_by_name(fw_features, "needs-l1d-flush-msr-hv-1-to-0");
-		if (np && of_property_read_bool(np, "disabled"))
-			enable--;
-
-		of_node_put(np);
-
-		np = of_get_child_by_name(fw_features, "needs-l1d-flush-msr-pr-0-to-1");
-		if (np && of_property_read_bool(np, "disabled"))
-			enable--;
-
-		np = of_get_child_by_name(fw_features, "speculation-policy-favor-security");
-		if (np && of_property_read_bool(np, "disabled"))
-			enable = 0;
-
-		of_node_put(np);
-		of_node_put(fw_features);
 	}
 
-	setup_rfi_flush(type, enable > 0);
+	enable = security_ftr_enabled(SEC_FTR_FAVOUR_SECURITY) && \
+		 (security_ftr_enabled(SEC_FTR_L1D_FLUSH_PR)   || \
+		  security_ftr_enabled(SEC_FTR_L1D_FLUSH_HV));
+
+	setup_rfi_flush(type, enable);
 }
 
 static void __init pnv_setup_arch(void)
@@ -166,17 +201,12 @@ static void pnv_prepare_going_down(void)
 	 */
 	opal_event_shutdown();
 
-	/* Soft disable interrupts */
-	local_irq_disable();
+	/* Print flash update message if one is scheduled. */
+	opal_flash_update_print_message();
 
-	/*
-	 * Return secondary CPUs to firwmare if a flash update
-	 * is pending otherwise we will get all sort of error
-	 * messages about CPU being stuck etc.. This will also
-	 * have the side effect of hard disabling interrupts so
-	 * past this point, the kernel is effectively dead.
-	 */
-	opal_flash_term_callback();
+	smp_send_stop();
+
+	hard_irq_disable();
 }
 
 static void  __noreturn pnv_restart(char *cmd)
@@ -258,7 +288,7 @@ static void pnv_kexec_wait_secondaries_down(void)
 			if (i != notified) {
 				printk(KERN_INFO "kexec: waiting for cpu %d "
 				       "(physical %d) to enter OPAL\n",
-				       i, paca[i].hw_cpu_id);
+				       i, paca_ptrs[i]->hw_cpu_id);
 				notified = i;
 			}
 
@@ -270,7 +300,7 @@ static void pnv_kexec_wait_secondaries_down(void)
 			if (timeout-- == 0) {
 				printk(KERN_ERR "kexec: timed out waiting for "
 				       "cpu %d (physical %d) to enter OPAL\n",
-				       i, paca[i].hw_cpu_id);
+				       i, paca_ptrs[i]->hw_cpu_id);
 				break;
 			}
 		}