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Tsirkin" , Cornelia Huck , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Subject: [PATCH v3 12/14] s390x: remember the maximum page size Date: Thu, 19 Dec 2024 15:41:13 +0100 Message-ID: <20241219144115.2820241-13-david@redhat.com> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20241219144115.2820241-1-david@redhat.com> References: <20241219144115.2820241-1-david@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.129.124; envelope-from=dhildenb@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -31 X-Spam_score: -3.2 X-Spam_bar: --- X-Spam_report: (-3.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-1.116, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, 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: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1734625728734116600 Content-Type: text/plain; charset="utf-8" Let's remember the value (successfully) set via s390_set_max_pagesize(). This will be helpful to reject hotplugged memory devices that would exceed this initially set page size. Handle it just like how we handle s390_get_memory_limit(), storing it in the machine, and moving the handling to machine code. Message-ID: <20241008105455.2302628-13-david@redhat.com> Acked-by: Michael S. Tsirkin Reviewed-by: Thomas Huth Signed-off-by: David Hildenbrand --- hw/s390x/s390-virtio-ccw.c | 12 +++++++++++- include/hw/s390x/s390-virtio-ccw.h | 1 + target/s390x/cpu-sysemu.c | 7 ------- target/s390x/cpu.h | 1 - 4 files changed, 12 insertions(+), 9 deletions(-) diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c index 2ba66be018..9f8d830798 100644 --- a/hw/s390x/s390-virtio-ccw.c +++ b/hw/s390x/s390-virtio-ccw.c @@ -143,6 +143,16 @@ static void s390_set_memory_limit(S390CcwMachineState = *s390ms, s390ms->memory_limit =3D new_limit; } =20 +static void s390_set_max_pagesize(S390CcwMachineState *s390ms, + uint64_t pagesize) +{ + assert(!s390ms->max_pagesize && pagesize); + if (kvm_enabled()) { + kvm_s390_set_max_pagesize(pagesize, &error_fatal); + } + s390ms->max_pagesize =3D pagesize; +} + static void s390_memory_init(MachineState *machine) { S390CcwMachineState *s390ms =3D S390_CCW_MACHINE(machine); @@ -191,7 +201,7 @@ static void s390_memory_init(MachineState *machine) * Configure the maximum page size. As no memory devices were created * yet, this is the page size of initial memory only. */ - s390_set_max_pagesize(qemu_maxrampagesize(), &error_fatal); + s390_set_max_pagesize(s390ms, qemu_maxrampagesize()); /* Initialize storage key device */ s390_skeys_init(); /* Initialize storage attributes device */ diff --git a/include/hw/s390x/s390-virtio-ccw.h b/include/hw/s390x/s390-vir= tio-ccw.h index de04336c5a..599740a998 100644 --- a/include/hw/s390x/s390-virtio-ccw.h +++ b/include/hw/s390x/s390-virtio-ccw.h @@ -30,6 +30,7 @@ struct S390CcwMachineState { bool pv; uint8_t loadparm[8]; uint64_t memory_limit; + uint64_t max_pagesize; =20 SCLPDevice *sclp; }; diff --git a/target/s390x/cpu-sysemu.c b/target/s390x/cpu-sysemu.c index 3118a25fee..706a5c53e2 100644 --- a/target/s390x/cpu-sysemu.c +++ b/target/s390x/cpu-sysemu.c @@ -255,13 +255,6 @@ unsigned int s390_cpu_set_state(uint8_t cpu_state, S39= 0CPU *cpu) return s390_count_running_cpus(); } =20 -void s390_set_max_pagesize(uint64_t pagesize, Error **errp) -{ - if (kvm_enabled()) { - kvm_s390_set_max_pagesize(pagesize, errp); - } -} - void s390_cmma_reset(void) { if (kvm_enabled()) { diff --git a/target/s390x/cpu.h b/target/s390x/cpu.h index b4506539f0..5b7992deda 100644 --- a/target/s390x/cpu.h +++ b/target/s390x/cpu.h @@ -881,7 +881,6 @@ static inline void s390_do_cpu_load_normal(CPUState *cs= , run_on_cpu_data arg) =20 /* cpu.c */ void s390_crypto_reset(void); -void s390_set_max_pagesize(uint64_t pagesize, Error **errp); void s390_cmma_reset(void); void s390_enable_css_support(S390CPU *cpu); void s390_do_cpu_set_diag318(CPUState *cs, run_on_cpu_data arg); --=20 2.47.1