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[2003:f6:af2e:fd00:225e:3e97:da45:b943]) by smtp.gmail.com with ESMTPSA id s7-20020a5d5107000000b002c556a4f1casm3877993wrt.42.2023.02.13.08.31.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 13 Feb 2023 08:31:38 -0800 (PST) From: Mathias Krause To: kvm@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Sean Christopherson , Paolo Bonzini , Mathias Krause Subject: [PATCH 2/5] KVM: x86: Shrink struct kvm_queued_exception Date: Mon, 13 Feb 2023 17:33:48 +0100 Message-Id: <20230213163351.30704-3-minipli@grsecurity.net> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230213163351.30704-1-minipli@grsecurity.net> References: <20230213163351.30704-1-minipli@grsecurity.net> MIME-Version: 1.0 X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1757734249934537024?= X-GMAIL-MSGID: =?utf-8?q?1757734249934537024?= Reshuffle the boolean members of struct kvm_queued_exception and make them individual bits, allowing denser packing. This allows us to shrink the object size from 24 to 16 bytes for 64 bit builds. Signed-off-by: Mathias Krause --- arch/x86/include/asm/kvm_host.h | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 43329c60a6b5..040eee3e9583 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -701,13 +701,13 @@ struct kvm_vcpu_xen { }; struct kvm_queued_exception { - bool pending; - bool injected; - bool has_error_code; + u8 pending : 1; + u8 injected : 1; + u8 has_error_code : 1; + u8 has_payload : 1; u8 vector; u32 error_code; unsigned long payload; - bool has_payload; }; struct kvm_vcpu_arch {