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d="scan'208";a="164701391" From: Zhao Liu To: Paolo Bonzini , Peter Xu , David Hildenbrand , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Manos Pitsidianakis , =?UTF-8?q?Alex=20Benn=C3=A9e?= , Thomas Huth , Junjie Mao Cc: qemu-devel@nongnu.org, qemu-rust@nongnu.org, Dapeng Mi , Chuanxiao Dong , Zhao Liu Subject: [RFC 26/26] rust/hpet: Use safe binding to access address space Date: Thu, 7 Aug 2025 20:30:27 +0800 Message-Id: <20250807123027.2910950-27-zhao1.liu@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250807123027.2910950-1-zhao1.liu@intel.com> References: <20250807123027.2910950-1-zhao1.liu@intel.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=192.198.163.15; envelope-from=zhao1.liu@intel.com; helo=mgamail.intel.com X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 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_MED=-2.3, 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 @intel.com) X-ZM-MESSAGEID: 1754568955542124100 Content-Type: text/plain; charset="utf-8" Currently, HPET uses unsafe address_space_stl_le() to store MSI message. Considerring HPET is used for x86 machines, and they're little endian. So address_space_stl_le() equals to address_space_stl(), which makes it possible to replace address_space_stl_le() with AddressSpace::store(). Therefore, use the safe binding - AddressSpace::store(), to access address space. Since then, the last unsafe piece of HPET has been filled in. Signed-off-by: Zhao Liu --- rust/hw/timer/hpet/src/device.rs | 27 ++++++++++----------------- 1 file changed, 10 insertions(+), 17 deletions(-) diff --git a/rust/hw/timer/hpet/src/device.rs b/rust/hw/timer/hpet/src/devi= ce.rs index 9fd75bf096e4..e7d5b57f2fe2 100644 --- a/rust/hw/timer/hpet/src/device.rs +++ b/rust/hw/timer/hpet/src/device.rs @@ -6,19 +6,17 @@ ffi::{c_int, c_void, CStr}, mem::MaybeUninit, pin::Pin, - ptr::{addr_of_mut, null_mut, NonNull}, + ptr::NonNull, slice::from_ref, }; =20 use qemu_api::{ - bindings::{ - address_space_memory, address_space_stl_le, qdev_prop_bit, qdev_pr= op_bool, - qdev_prop_uint32, qdev_prop_usize, - }, + bindings::{qdev_prop_bit, qdev_prop_bool, qdev_prop_uint32, qdev_prop_= usize}, cell::{BqlCell, BqlRefCell}, irq::InterruptSource, memory::{ - hwaddr, MemoryRegion, MemoryRegionOps, MemoryRegionOpsBuilder, MEM= TXATTRS_UNSPECIFIED, + hwaddr, GuestAddress, MemoryRegion, MemoryRegionOps, MemoryRegionO= psBuilder, + ADDRESS_SPACE_MEMORY, }, prelude::*, qdev::{DeviceImpl, DeviceState, Property, ResetType, ResettablePhasesI= mpl}, @@ -327,17 +325,12 @@ fn set_irq(&mut self, set: bool) { =20 if set && self.is_int_enabled() && self.get_state().is_hpet_enable= d() { if self.is_fsb_route_enabled() { - // SAFETY: - // the parameters are valid. - unsafe { - address_space_stl_le( - addr_of_mut!(address_space_memory), - self.fsb >> 32, // Timer N FSB int addr - self.fsb as u32, // Timer N FSB int value, truncat= e! - MEMTXATTRS_UNSPECIFIED, - null_mut(), - ); - } + ADDRESS_SPACE_MEMORY + .store( + GuestAddress(self.fsb >> 32), // Timer N FSB int a= ddr + self.fsb as u32, // Timer N FSB int v= alue, truncate! + ) + .expect("Failed to store into ADDRESS_SPACE_MEMORY."); } else if self.is_int_level_triggered() { self.get_state().irqs[route].raise(); } else { --=20 2.34.1