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

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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>
Message-ID: <20240115073244.174155-1-maobibo@loongson.cn>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Bibo Mao 2024-01-15 15:32:44 +08:00 committed by Paolo Bonzini
parent 592d0bc030
commit 5fd1674d21
1 changed files with 8 additions and 0 deletions
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8
include/qemu/osdep.h
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@ -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