From: Mathias Krause <minipli@grsecurity.net>
To: kvm@vger.kernel.org
Cc: linux-kernel@vger.kernel.org,
Sean Christopherson <seanjc@google.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Mathias Krause <minipli@grsecurity.net>
Subject: [PATCH 2/5] KVM: x86: Shrink struct kvm_queued_exception
Date: Mon, 13 Feb 2023 17:33:48 +0100 [thread overview]
Message-ID: <20230213163351.30704-3-minipli@grsecurity.net> (raw)
In-Reply-To: <20230213163351.30704-1-minipli@grsecurity.net>
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 <minipli@grsecurity.net>
---
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 {
--
2.39.1
next prev parent reply other threads:[~2023-02-13 16:31 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-13 16:33 [PATCH 0/5] KVM: Put struct kvm_vcpu on a diet Mathias Krause
2023-02-13 16:33 ` [PATCH 1/5] KVM: x86: Shrink struct kvm_pmu Mathias Krause
2023-02-13 16:33 ` Mathias Krause [this message]
2023-02-18 14:55 ` [PATCH 2/5] KVM: x86: Shrink struct kvm_queued_exception Tom Lendacky
2023-02-13 16:33 ` [PATCH 3/5] KVM: Shrink struct kvm_mmu_memory_cache Mathias Krause
2023-02-13 17:08 ` Sean Christopherson
2023-02-14 12:20 ` Mathias Krause
2023-02-13 16:33 ` [PATCH 4/5] KVM: x86: Shrink struct kvm_vcpu_arch Mathias Krause
2023-02-13 16:33 ` [PATCH 5/5] KVM: Shrink struct kvm_vcpu Mathias Krause
2023-02-13 17:05 ` [PATCH 0/5] KVM: Put struct kvm_vcpu on a diet Sean Christopherson
2023-02-14 12:19 ` Mathias Krause
2023-02-16 17:32 ` Sean Christopherson
2023-02-17 16:07 ` Mathias Krause
2023-02-17 16:35 ` Sean Christopherson
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