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* backends: Have HostMemoryBackendClass::alloc() handler return a booleanPhilippe Mathieu-Daudé2024-01-051-6/+5
| | | | | | | | | | | Following the example documented since commit e3fe3988d7 ("error: Document Error API usage rules"), have HostMemoryBackendClass::alloc return a boolean indicating whether an error is set or not. Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org> Reviewed-by: Gavin Shan <gshan@redhat.com> Message-Id: <20231120213301.24349-17-philmd@linaro.org>
* backends: Use g_autofree in HostMemoryBackendClass::alloc() handlersPhilippe Mathieu-Daudé2024-01-051-2/+1
| | | | | | | | | | In preparation of having HostMemoryBackendClass::alloc() handlers return a boolean, have them use g_autofree. Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org> Reviewed-by: Gavin Shan <gshan@redhat.com> Message-Id: <20231120213301.24349-15-philmd@linaro.org>
* Fix non-first inclusions of qemu/osdep.hMarkus Armbruster2023-02-081-1/+1
| | | | | | | | | | This commit was created with scripts/clean-includes. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Message-Id: <20230202133830.2152150-18-armbru@redhat.com>
* Remove qemu-common.h include from most unitsMarc-André Lureau2022-04-061-1/+0
| | | | | | Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <20220323155743.1585078-33-marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* hostmem: Add hostmem-epc as a backend for SGX EPCSean Christopherson2021-09-301-0/+82
EPC (Enclave Page Cahe) is a specialized type of memory used by Intel SGX (Software Guard Extensions). The SDM desribes EPC as: The Enclave Page Cache (EPC) is the secure storage used to store enclave pages when they are a part of an executing enclave. For an EPC page, hardware performs additional access control checks to restrict access to the page. After the current page access checks and translations are performed, the hardware checks that the EPC page is accessible to the program currently executing. Generally an EPC page is only accessed by the owner of the executing enclave or an instruction which is setting up an EPC page. Because of its unique requirements, Linux manages EPC separately from normal memory. Similar to memfd, the device /dev/sgx_vepc can be opened to obtain a file descriptor which can in turn be used to mmap() EPC memory. Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com> Signed-off-by: Yang Zhong <yang.zhong@intel.com> Message-Id: <20210719112136.57018-3-yang.zhong@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>