util/cacheflush: Fix error generated by clang

When compiling qemu-fuzz-i386 on aarch64 host, clang reported the following
error:

../util/cacheflush.c:38:44: error: value size does not match register size
specified by the constraint and modifier [-Werror,-Wasm-operand-widths]
    asm volatile("mrs\t%0, ctr_el0" : "=r"(save_ctr_el0));
                                           ^
../util/cacheflush.c:38:24: note: use constraint modifier "w"
    asm volatile("mrs\t%0, ctr_el0" : "=r"(save_ctr_el0));
                       ^~
                       %w0

Modify the type of save_ctr_el0 to uint64_t to fix it.

Reported-by: Euler Robot <euler.robot@huawei.com>
Signed-off-by: Gan Qixin <ganqixin@huawei.com>
Message-Id: <20210115075656.717957-1-ganqixin@huawei.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

diff --git a/util/cacheflush.c b/util/cacheflush.c
index 6a20723902e83606320bf5d7da968120c1041963..933355b0c99120c0edb35834a98ad36414778098 100644 (file)
--- a/util/cacheflush.c
+++ b/util/cacheflush.c
@@ -32,7 +32,7 @@ void flush_idcache_range(uintptr_t rx, uintptr_t rw, size_t len)
  * We want to save the whole contents of CTR_EL0, so that we
  * have more than the linesize, but also IDC and DIC.
  */
-static unsigned int save_ctr_el0;
+static uint64_t save_ctr_el0;
 static void __attribute__((constructor)) init_ctr_el0(void)
 {
     asm volatile("mrs\t%0, ctr_el0" : "=r"(save_ctr_el0));
@@ -46,9 +46,9 @@ void flush_idcache_range(uintptr_t rx, uintptr_t rw, size_t len)
 {
     const unsigned CTR_IDC = 1u << 28;
     const unsigned CTR_DIC = 1u << 29;
-    const unsigned int ctr_el0 = save_ctr_el0;
-    const uintptr_t icache_lsize = 4 << extract32(ctr_el0, 0, 4);
-    const uintptr_t dcache_lsize = 4 << extract32(ctr_el0, 16, 4);
+    const uint64_t ctr_el0 = save_ctr_el0;
+    const uintptr_t icache_lsize = 4 << extract64(ctr_el0, 0, 4);
+    const uintptr_t dcache_lsize = 4 << extract64(ctr_el0, 16, 4);
     uintptr_t p;
 
     /*