From: Philippe Mathieu-Daudé <philmd@linaro.org>
Date: Mon, 29 Sep 2025 08:31:00 +0000 (+0200)
Subject: accel/hvf: Enforce host alignment in hv_vm_protect()
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0b36673c27d30edd6b186d2912fcc9ed569577cc;p=thirdparty%2Fqemu.git

accel/hvf: Enforce host alignment in hv_vm_protect()

hv_vm_protect() arguments must be aligned to host page.

Suggested-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Akihiko Odaki <odaki@rsg.ci.i.u-tokyo.ac.jp>
Message-ID: <20260112103034.65310-4-philmd@linaro.org>
---

diff --git a/accel/hvf/hvf-all.c b/accel/hvf/hvf-all.c
index 741b4bdc4f..96ed79108a 100644
--- a/accel/hvf/hvf-all.c
+++ b/accel/hvf/hvf-all.c
@@ -11,6 +11,7 @@
 #include "qemu/osdep.h"
 #include "qemu/error-report.h"
 #include "accel/accel-ops.h"
+#include "exec/cpu-common.h"
 #include "system/address-spaces.h"
 #include "system/memory.h"
 #include "system/hvf.h"
@@ -61,12 +62,15 @@ void assert_hvf_ok_impl(hv_return_t ret, const char *file, unsigned int line,
 static void do_hv_vm_protect(hwaddr start, size_t size,
                              hv_memory_flags_t flags)
 {
+    intptr_t page_mask = qemu_real_host_page_mask();
     hv_return_t ret;
 
     trace_hvf_vm_protect(start, size, flags,
                          flags & HV_MEMORY_READ  ? 'R' : '-',
                          flags & HV_MEMORY_WRITE ? 'W' : '-',
                          flags & HV_MEMORY_EXEC  ? 'X' : '-');
+    g_assert(!((uintptr_t)start & ~page_mask));
+    g_assert(!(size & ~page_mask));
 
     ret = hv_vm_protect(start, size, flags);
     assert_hvf_ok(ret);