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Tom Lendacky 4cdc489eb9 i386/kvm: Prefault memory on page state change ... A page state change is typically followed by an access of the page(s) and results in another VMEXIT in order to map the page into the nested page table. Depending on the size of page state change request, this can generate a number of additional VMEXITs. For example, under SNP, when Linux is utilizing lazy memory acceptance, memory is typically accepted in 4M chunks. A page state change request is submitted to mark the pages as private, followed by validation of the memory. Since the guest_memfd currently only supports 4K pages, each page validation will result in VMEXIT to map the page, resulting in 1024 additional exits. When performing a page state change, invoke KVM_PRE_FAULT_MEMORY for the size of the page state change in order to pre-map the pages and avoid the additional VMEXITs. This helps speed up boot times. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Link: https://lore.kernel.org/r/f5411c42340bd2f5c14972551edb4e959995e42b.1743193824.git.thomas.lendacky@amd.com Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>		2 days ago
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kvm-accel-ops.c	qom: Have class_init() take a const data argument	1 month ago
kvm-all.c	i386/kvm: Prefault memory on page state change	2 days ago
kvm-cpus.h	accel/kvm: Remove unused 'system/cpus.h' header in kvm-cpus.h	3 months ago
meson.build	target/i386/kvm: Restrict SEV stubs to x86 architecture	4 years ago
trace-events	KVM: Dynamic sized kvm memslots array	8 months ago
trace.h	trace: switch position of headers to what Meson requires	5 years ago