This is a loose collection of patches against the x86 hvf accel. They can be applied/pulled independently from one another.
Patch 1 is a repost of a patch I've submitted a bunch of times already. It wires up and enables x2APIC mode in conjunction with HVF - the software APIC implementation in QEMU gained the feature earlier this year but hvf wasn't included. The change typically improves performance with modern SMP guest OSes by a 2-digit percentage. (Exact values depend on workload.) Patch 2 fixes cases of undefined behaviour recently introduced by commit 7cac7aa which made changes to HVF CPUID XSAVE functionality. Patch 3 fixes a minor one-off memory leak during hvf startup. Patch 4 ever so slightly improves APIC correctness under hvf: when setting the APICBASE MSR, if the APIC deems the new value invalid, we raise an exception (as per spec) rather than silently doing nothing. This fixes a failing kvm-unit-tests test case. Patch 5 removes some unnecessary duplication and type-rechecking in HVF's inner loop. (No need to cast the cpu state pointer to X86CPU within, the hvf_vcp_exec function already does that once at the top.) Some of this work has been sponsored by Sauce Labs Inc. Phil Dennis-Jordan (5): i386/hvf: Integrates x2APIC support with hvf accel i386/hvf: Fix for UB in handling CPUID function 0xD i386/hvf: Fixes startup memory leak (vmcs caps) i386/hvf: Raise exception on error setting APICBASE i386/hvf: Removes duplicate/shadowed variables in hvf_vcpu_exec target/i386/hvf/hvf.c | 7 +++---- target/i386/hvf/x86_cpuid.c | 6 +++--- target/i386/hvf/x86_emu.c | 42 +++++++++++++++++++++++++++++++++++-- 3 files changed, 46 insertions(+), 9 deletions(-) -- 2.39.3 (Apple Git-145)
