Re: [Qemu-devel] [PATCH v2 1/3] compiler: define QEMU_CACHELINE_SIZE

[Emilio G. Cota]

On Tue, Jun 06, 2017 at 22:28:23 +0200, Geert Martin Ijewski wrote:
> On a fully patched Windows 10 with an i5-4690 this code works for me (TM):

Thanks!
Can you please test this?

                Emilio
---
#include "qemu/osdep.h"
#include <windows.h>

static unsigned int linesize_win(PROCESSOR_CACHE_TYPE type)
{
    PSYSTEM_LOGICAL_PROCESSOR_INFORMATION buf;
    DWORD size = 0;
    unsigned int ret = 0;
    BOOL success;
    size_t n;
    size_t i;

    success = GetLogicalProcessorInformation(0, &size);
    if (success || GetLastError() != ERROR_INSUFFICIENT_BUF) {
        return 0;
    }
    buf = (PSYSTEM_LOGICAL_PROCESSOR_INFORMATION)g_malloc0(size);
    if (!GetLogicalProcessorInformation(buf, &size)) {
        goto out;
    }

    n = size / sizeof(SYSTEM_LOGICAL_PROCESSOR_INFORMATION);
    for (i = 0; i < n; i++) {
        if (buf[i].Relationship == RelationCache &&
            buf[i].Cache.Level == 1 &&
            (buf[i].Cache.Type == CacheUnified ||
             buf[i].Cache.Type == type)) {
            ret = buf[i].Cache.LineSize;
            break;
        }
    }
 out:
    g_free(buf);
    return ret;
}

linesize_win(CacheInstruction);
linesize_win(CacheData);