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That's all we know. X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: fam@euphon.net, berrange@redhat.com, =?UTF-8?q?Alex=20Benn=C3=A9e?= , richard.henderson@linaro.org, f4bug@amsat.org, Christian Ehrhardt , cota@braap.org, Stefan Weil , Paolo Bonzini , aurelien@aurel32.net Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) This will be used in a future patch. For POSIX systems _SC_PHYS_PAGES isn't standardised but at least appears in the man pages for Open/FreeBSD. The result is advisory so any users of it shouldn't just fail if we can't work it out. The win32 stub currently returns 0 until someone with a Windows system can develop and test a patch. Signed-off-by: Alex Benn=C3=A9e Cc: BALATON Zoltan Cc: Christian Ehrhardt Message-Id: <20200717105139.25293-5-alex.bennee@linaro.org> Reviewed-by: Richard Henderson --- v2 - fix agnostic typo - saturate to SIZE_MAX rather than overflow --- include/qemu/osdep.h | 12 ++++++++++++ util/oslib-posix.c | 15 +++++++++++++++ util/oslib-win32.c | 6 ++++++ 3 files changed, 33 insertions(+) diff --git a/include/qemu/osdep.h b/include/qemu/osdep.h index 4841b5c6b5f..e44547fb33e 100644 --- a/include/qemu/osdep.h +++ b/include/qemu/osdep.h @@ -665,4 +665,16 @@ static inline void qemu_reset_optind(void) */ char *qemu_get_host_name(Error **errp); =20 +/** + * qemu_get_host_physmem: + * + * Operating system agnostic way of querying host memory. + * + * Returns amount of physical memory on the system. This is purely + * advisery and may return 0 if we can't work it out. At the other + * end we saturate to SIZE_MAX if you are lucky enough to have that + * much memory. + */ +size_t qemu_get_host_physmem(void); + #endif diff --git a/util/oslib-posix.c b/util/oslib-posix.c index d9236746248..ad8001a4ad8 100644 --- a/util/oslib-posix.c +++ b/util/oslib-posix.c @@ -841,3 +841,18 @@ char *qemu_get_host_name(Error **errp) =20 return g_steal_pointer(&hostname); } + +size_t qemu_get_host_physmem(void) +{ +#ifdef _SC_PHYS_PAGES + long pages =3D sysconf(_SC_PHYS_PAGES); + if (pages > 0) { + if (pages > SIZE_MAX / qemu_real_host_page_size) { + return SIZE_MAX; + } else { + return pages * qemu_real_host_page_size; + } + } +#endif + return 0; +} diff --git a/util/oslib-win32.c b/util/oslib-win32.c index 7eedbe5859a..31030463cc9 100644 --- a/util/oslib-win32.c +++ b/util/oslib-win32.c @@ -828,3 +828,9 @@ char *qemu_get_host_name(Error **errp) =20 return g_utf16_to_utf8(tmp, size, NULL, NULL, NULL); } + +size_t qemu_get_host_physmem(void) +{ + /* currently unimplemented */ + return 0; +} --=20 2.20.1