From: Yanan Wang <wangyanan55@huawei.com>
To: <kvm@vger.kernel.org>, <linux-kselftest@vger.kernel.org>,
<linux-kernel@vger.kernel.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>,
Ben Gardon <bgardon@google.com>,
"Sean Christopherson" <seanjc@google.com>,
Vitaly Kuznetsov <vkuznets@redhat.com>,
Andrew Jones <drjones@redhat.com>, Peter Xu <peterx@redhat.com>,
Marc Zyngier <maz@kernel.org>, Ingo Molnar <mingo@kernel.org>,
Adrian Hunter <adrian.hunter@intel.com>,
Jiri Olsa <jolsa@redhat.com>,
"Arnaldo Carvalho de Melo" <acme@redhat.com>,
Arnd Bergmann <arnd@arndb.de>,
Michael Kerrisk <mtk.manpages@gmail.com>,
Thomas Gleixner <tglx@linutronix.de>,
<wanghaibin.wang@huawei.com>, <yezengruan@huawei.com>,
<yuzenghui@huawei.com>, Yanan Wang <wangyanan55@huawei.com>
Subject: [RFC PATCH v4 2/9] tools headers: Add a macro to get HUGETLB page sizes for mmap
Date: Tue, 2 Mar 2021 20:57:44 +0800 [thread overview]
Message-ID: <20210302125751.19080-3-wangyanan55@huawei.com> (raw)
In-Reply-To: <20210302125751.19080-1-wangyanan55@huawei.com>
We know that if a system supports multiple hugetlb page sizes,
the desired hugetlb page size can be specified in bits [26:31]
of the flag arguments. The value in these 6 bits will be the
shift of each hugetlb page size.
So add a macro to get the page size shift and then calculate the
corresponding hugetlb page size, using flag x.
Cc: Ben Gardon <bgardon@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Suggested-by: Ben Gardon <bgardon@google.com>
Signed-off-by: Yanan Wang <wangyanan55@huawei.com>
Reviewed-by: Ben Gardon <bgardon@google.com>
---
include/uapi/linux/mman.h | 2 ++
tools/include/uapi/linux/mman.h | 2 ++
2 files changed, 4 insertions(+)
diff --git a/include/uapi/linux/mman.h b/include/uapi/linux/mman.h
index f55bc680b5b0..8bd41128a0ee 100644
--- a/include/uapi/linux/mman.h
+++ b/include/uapi/linux/mman.h
@@ -41,4 +41,6 @@
#define MAP_HUGE_2GB HUGETLB_FLAG_ENCODE_2GB
#define MAP_HUGE_16GB HUGETLB_FLAG_ENCODE_16GB
+#define MAP_HUGE_PAGE_SIZE(x) (1 << ((x >> MAP_HUGE_SHIFT) & MAP_HUGE_MASK))
+
#endif /* _UAPI_LINUX_MMAN_H */
diff --git a/tools/include/uapi/linux/mman.h b/tools/include/uapi/linux/mman.h
index f55bc680b5b0..8bd41128a0ee 100644
--- a/tools/include/uapi/linux/mman.h
+++ b/tools/include/uapi/linux/mman.h
@@ -41,4 +41,6 @@
#define MAP_HUGE_2GB HUGETLB_FLAG_ENCODE_2GB
#define MAP_HUGE_16GB HUGETLB_FLAG_ENCODE_16GB
+#define MAP_HUGE_PAGE_SIZE(x) (1 << ((x >> MAP_HUGE_SHIFT) & MAP_HUGE_MASK))
+
#endif /* _UAPI_LINUX_MMAN_H */
--
2.23.0
next prev parent reply other threads:[~2021-03-02 15:36 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-02 12:57 [RFC PATCH v4 0/9] KVM: selftests: some improvement and a new test for kvm page table Yanan Wang
2021-03-02 12:57 ` [RFC PATCH v4 1/9] tools headers: sync headers of asm-generic/hugetlb_encode.h Yanan Wang
2021-03-02 12:57 ` Yanan Wang [this message]
2021-03-12 11:14 ` [RFC PATCH v4 2/9] tools headers: Add a macro to get HUGETLB page sizes for mmap Andrew Jones
2021-03-15 2:06 ` wangyanan (Y)
2021-03-02 12:57 ` [RFC PATCH v4 3/9] KVM: selftests: Use flag CLOCK_MONOTONIC_RAW for timing Yanan Wang
2021-03-12 11:17 ` Andrew Jones
2021-03-02 12:57 ` [RFC PATCH v4 4/9] KVM: selftests: Make a generic helper to get vm guest mode strings Yanan Wang
2021-03-02 12:57 ` [RFC PATCH v4 5/9] KVM: selftests: Add a helper to get system configured THP page size Yanan Wang
2021-03-12 11:31 ` Andrew Jones
2021-03-22 6:42 ` wangyanan (Y)
2021-03-02 12:57 ` [RFC PATCH v4 6/9] KVM: selftests: Add a helper to get system default hugetlb " Yanan Wang
2021-03-12 11:40 ` Andrew Jones
2021-03-22 6:45 ` wangyanan (Y)
2021-03-02 12:57 ` [RFC PATCH v4 7/9] KVM: selftests: List all hugetlb src types specified with page sizes Yanan Wang
2021-03-12 11:49 ` Andrew Jones
2021-03-22 7:22 ` wangyanan (Y)
2021-03-12 12:02 ` Andrew Jones
2021-03-22 7:23 ` wangyanan (Y)
2021-03-02 12:57 ` [RFC PATCH v4 8/9] KVM: selftests: Adapt vm_userspace_mem_region_add to new helpers Yanan Wang
2021-03-12 11:52 ` Andrew Jones
2021-03-02 12:57 ` [RFC PATCH v4 9/9] KVM: selftests: Add a test for kvm page table code Yanan Wang
2021-03-12 14:20 ` Andrew Jones
2021-03-22 11:59 ` wangyanan (Y)
2021-03-12 5:03 ` [RFC PATCH v4 0/9] KVM: selftests: some improvement and a new test for kvm page table wangyanan (Y)
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210302125751.19080-3-wangyanan55@huawei.com \
--to=wangyanan55@huawei.com \
--cc=acme@redhat.com \
--cc=adrian.hunter@intel.com \
--cc=arnd@arndb.de \
--cc=bgardon@google.com \
--cc=drjones@redhat.com \
--cc=jolsa@redhat.com \
--cc=kvm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-kselftest@vger.kernel.org \
--cc=maz@kernel.org \
--cc=mingo@kernel.org \
--cc=mtk.manpages@gmail.com \
--cc=pbonzini@redhat.com \
--cc=peterx@redhat.com \
--cc=seanjc@google.com \
--cc=tglx@linutronix.de \
--cc=vkuznets@redhat.com \
--cc=wanghaibin.wang@huawei.com \
--cc=yezengruan@huawei.com \
--cc=yuzenghui@huawei.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).