#include <asm/cacheflush.h>
#include <asm/cpufeature.h>
+#include <asm/daifflags.h>
#include <asm/proc-fns.h>
#include <asm-generic/mm_hooks.h>
#include <asm/cputype.h>
typedef void (ttbr_replace_func)(phys_addr_t);
extern ttbr_replace_func idmap_cpu_replace_ttbr1;
ttbr_replace_func *replace_phys;
+ unsigned long daif;
/* phys_to_ttbr() zeros lower 2 bits of ttbr with 52-bit PA */
phys_addr_t ttbr1 = phys_to_ttbr(virt_to_phys(pgdp));
replace_phys = (void *)__pa_symbol(idmap_cpu_replace_ttbr1);
__cpu_install_idmap(idmap);
+
+ /*
+ * We really don't want to take *any* exceptions while TTBR1 is
+ * in the process of being replaced so mask everything.
+ */
+ daif = local_daif_save();
replace_phys(ttbr1);
+ local_daif_restore(daif);
+
cpu_uninstall_idmap();
}
* called by anything else. It can only be executed from a TTBR0 mapping.
*/
SYM_TYPED_FUNC_START(idmap_cpu_replace_ttbr1)
- save_and_disable_daif flags=x2
-
__idmap_cpu_set_reserved_ttbr1 x1, x3
offset_ttbr1 x0, x3
msr ttbr1_el1, x0
isb
- restore_daif x2
-
ret
SYM_FUNC_END(idmap_cpu_replace_ttbr1)
.popsection