Enable MEIP in OpenSBI

lagarto-ox.nix

@@ -332,6 +332,7 @@
       ];
       patches = [
         ./opensbi-timer-debug.patch
+        ./opensbi-enable-meip.patch
         #./opensbi-dont-delegate.patch
         #./ox-alveo-platform-plic.patch
       ];

opensbi-enable-meip.patch

@@ -0,0 +1,24 @@
+diff --git a/lib/sbi/sbi_irqchip.c b/lib/sbi/sbi_irqchip.c
+index 0ae604a..dd4592a 100644
+--- a/lib/sbi/sbi_irqchip.c
++++ b/lib/sbi/sbi_irqchip.c
+@@ -37,8 +37,7 @@ int sbi_irqchip_init(struct sbi_scratch *scratch, bool cold_boot)
+ 	if (rc)
+ 		return rc;
+ 
+-	if (ext_irqfn != default_irqfn)
+-		csr_set(CSR_MIE, MIP_MEIP);
++	csr_set(CSR_MIE, MIP_MEIP);
+ 
+ 	return 0;
+ }
+@@ -47,8 +46,7 @@ void sbi_irqchip_exit(struct sbi_scratch *scratch)
+ {
+ 	const struct sbi_platform *plat = sbi_platform_ptr(scratch);
+ 
+-	if (ext_irqfn != default_irqfn)
+-		csr_clear(CSR_MIE, MIP_MEIP);
++	csr_clear(CSR_MIE, MIP_MEIP);
+ 
+ 	sbi_platform_irqchip_exit(plat);
+ }