From: Michael Tremer <michael.tremer@ipfire.org>
Date: Wed, 15 Mar 2023 18:29:42 +0000 (+0000)
Subject: jail: Enable all QEMU CPU features by default
X-Git-Url: http://git.ipfire.org/gitweb/gitweb.cgi?a=commitdiff_plain;h=aac86bd34231069f2f386b3c597bab1e74804bf1;p=people%2Fstevee%2Fpakfire.git

jail: Enable all QEMU CPU features by default

When we are emulating a different architecture, QEMU by default emulates
a very basic processor which might not be able to emulate for example
SIMD instructions.

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>
---

diff --git a/src/libpakfire/arch.c b/src/libpakfire/arch.c
index eabf953c..68076e5e 100644
--- a/src/libpakfire/arch.c
+++ b/src/libpakfire/arch.c
@@ -248,7 +248,7 @@ int pakfire_arch_is_compatible(const char* name, const char* compatible_arch) {
 	return 0;
 }
 
-static int pakfire_arch_supported_by_host(const char* name) {
+int pakfire_arch_supported_by_host(const char* name) {
 	if (!name) {
 		errno = EINVAL;
 		return 1;
diff --git a/src/libpakfire/include/pakfire/arch.h b/src/libpakfire/include/pakfire/arch.h
index 268c1b68..84ff0387 100644
--- a/src/libpakfire/include/pakfire/arch.h
+++ b/src/libpakfire/include/pakfire/arch.h
@@ -40,6 +40,7 @@ int __pakfire_arch_buildtarget(char* buffer, size_t length, const char* arch, co
 const char* pakfire_arch_platform(const char* name);
 int pakfire_arch_is_compatible(const char* name, const char* compatible_arch);
 
+int pakfire_arch_supported_by_host(const char* name);
 char* pakfire_arch_find_interpreter(const char* name);
 
 #endif
diff --git a/src/libpakfire/jail.c b/src/libpakfire/jail.c
index 9cb34733..c81c169a 100644
--- a/src/libpakfire/jail.c
+++ b/src/libpakfire/jail.c
@@ -253,6 +253,8 @@ PAKFIRE_EXPORT int pakfire_jail_create(struct pakfire_jail** jail,
 		struct pakfire* pakfire, int flags) {
 	int r;
 
+	const char* arch = pakfire_get_arch(pakfire);
+
 	// Allocate a new jail
 	struct pakfire_jail* j = calloc(1, sizeof(*j));
 	if (!j)
@@ -279,6 +281,13 @@ PAKFIRE_EXPORT int pakfire_jail_create(struct pakfire_jail** jail,
 			goto ERROR;
 	}
 
+	// Enable all CPU features that CPU has to offer
+	if (!pakfire_arch_supported_by_host(arch)) {
+		r = pakfire_jail_set_env(j, "QEMU_CPU", "max");
+		if (r)
+			goto ERROR;
+	}
+
 	// Set container UUID
 	r = pakfire_jail_set_env(j, "container_uuid", pakfire_jail_uuid(j));
 	if (r)