[PATCH 0/1] MR8506: wineboot: Detect TSC frequency on Arm64

[Ryan Houdek (＠sonicadvance1)]

Otherwise the `~MHz` registry key is initialized to the
maximum clock speed of the CPUs, which is known to break games.

-- 
https://gitlab.winehq.org/wine/wine/-/merge_requests/8506

[PATCH 1/1] wineboot: Detect TSC frequency on Arm64

[Ryan Houdek]

From: Ryan Houdek <Sonicadvance1(a)gmail.com>

Otherwise the `~MHz` registry key is initialized to the
maximum clock speed of the CPUs, which is known to break games.
---
 programs/wineboot/wineboot.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/programs/wineboot/wineboot.c b/programs/wineboot/wineboot.c
index 02d192a1982..8359e5d4c44 100644
--- a/programs/wineboot/wineboot.c
+++ b/programs/wineboot/wineboot.c
@@ -297,6 +297,15 @@ static UINT64 read_tsc_frequency(void)
     return freq;
 }
 
+#elif defined(__aarch64__)
+
+static UINT64 read_tsc_frequency(void)
+{
+    UINT64 tsc_frequency;
+    __asm__ volatile( "mrs %[Res], CNTFRQ_EL0" : [Res] "=r" (tsc_frequency) );
+    return tsc_frequency;
+}
+
 #else
 
 static UINT64 read_tsc_frequency(void)
-- 
GitLab

https://gitlab.winehq.org/wine/wine/-/merge_requests/8506