Commit 12aad916 authored by Mathias Krause's avatar Mathias Krause Committed by Sean Christopherson
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KVM: x86: Shrink struct kvm_pmu 



Move the 'version' member to the beginning of the structure to reuse an
existing hole instead of introducing another one.

This allows us to save 8 bytes for 64 bit builds.

Signed-off-by: default avatarMathias Krause <minipli@grsecurity.net>
Link: https://lore.kernel.org/r/20230217193336.15278-2-minipli@grsecurity.net


Signed-off-by: default avatarSean Christopherson <seanjc@google.com>
parent d8708b80

arch/x86/include/asm/kvm_host.h

+1 −1
Original line number Diff line number Diff line
@@ -515,6 +515,7 @@ struct kvm_pmc { 
#define MSR_ARCH_PERFMON_FIXED_CTR_MAX	(MSR_ARCH_PERFMON_FIXED_CTR0 + KVM_PMC_MAX_FIXED - 1)

#define KVM_AMD_PMC_MAX_GENERIC	6

struct kvm_pmu {

	u8 version;

	unsigned nr_arch_gp_counters;

	unsigned nr_arch_fixed_counters;

	unsigned available_event_types;
@@ -527,7 +528,6 @@ struct kvm_pmu { 
	u64 global_ovf_ctrl_mask;

	u64 reserved_bits;

	u64 raw_event_mask;

	u8 version;

	struct kvm_pmc gp_counters[KVM_INTEL_PMC_MAX_GENERIC];

	struct kvm_pmc fixed_counters[KVM_PMC_MAX_FIXED];

	struct irq_work irq_work;