diff mbox series

qemu/osdep: Add huge page aligned support on LoongArch platform

Message ID 20240115073244.174155-1-maobibo@loongson.cn
State New
Headers show
Series qemu/osdep: Add huge page aligned support on LoongArch platform | expand

Commit Message

Bibo Mao Jan. 15, 2024, 7:32 a.m. UTC 
On LoongArch kvm mode if transparent huge page wants to be enabled, base
address and size of memslot from both HVA and GPA view. And LoongArch
supports both 4K and 16K page size with Linux kernel, so transparent huge
page size is calculated from real page size rather than hardcoded size.

Signed-off-by: Bibo Mao <maobibo@loongson.cn>
---
 include/qemu/osdep.h | 8 ++++++++
 1 file changed, 8 insertions(+)

Comments

Paolo Bonzini Jan. 16, 2024, 10:12 a.m. UTC | #1 
Queued, thanks.

Paolo
diff mbox series

Patch

diff --git a/include/qemu/osdep.h b/include/qemu/osdep.h
index 9a405bed89..c9692cc314 100644
--- a/include/qemu/osdep.h
+++ b/include/qemu/osdep.h
@@ -547,6 +547,14 @@  int madvise(char *, size_t, int);
 #  define QEMU_VMALLOC_ALIGN (256 * 4096)
 #elif defined(__linux__) && defined(__sparc__)
 #  define QEMU_VMALLOC_ALIGN MAX(qemu_real_host_page_size(), SHMLBA)
+#elif defined(__linux__) && defined(__loongarch__)
+   /*
+    * For transparent hugepage optimization, it has better be huge page
+    * aligned. LoongArch host system supports two kinds of pagesize: 4K
+    * and 16K, here calculate huge page size from host page size
+    */
+#  define QEMU_VMALLOC_ALIGN (qemu_real_host_page_size() * \
+                         qemu_real_host_page_size() / sizeof(long))
 #else
 #  define QEMU_VMALLOC_ALIGN qemu_real_host_page_size()
 #endif