Date: Thu, 3 May 2012 05:04:37 +0000 (UTC) From: Peter Grehan <grehan@FreeBSD.org> To: src-committers@freebsd.org, svn-src-projects@freebsd.org Subject: svn commit: r234939 - projects/bhyve/sys/amd64/vmm Message-ID: <201205030504.q4354bP5020368@svn.freebsd.org>
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Author: grehan Date: Thu May 3 05:04:37 2012 New Revision: 234939 URL: http://svn.freebsd.org/changeset/base/234939 Log: Until the issue of how to handle guest XCR0 state is resolved, prevent CURRENT guests from hitting unhandled xsetbv exits by hiding the xsave/osxsave/avx cpuid2 bits. Modified: projects/bhyve/sys/amd64/vmm/x86.c Modified: projects/bhyve/sys/amd64/vmm/x86.c ============================================================================== --- projects/bhyve/sys/amd64/vmm/x86.c Thu May 3 03:11:27 2012 (r234938) +++ projects/bhyve/sys/amd64/vmm/x86.c Thu May 3 05:04:37 2012 (r234939) @@ -105,6 +105,13 @@ x86_emulate_cpuid(uint32_t *eax, uint32_ regs[2] |= CPUID2_X2APIC | CPUID2_HV; /* + * Hide xsave/osxsave/avx until the FPU save/restore + * issues are resolved + */ + regs[2] &= ~(CPUID2_XSAVE | CPUID2_OSXSAVE | + CPUID2_AVX); + + /* * Hide thermal monitoring */ regs[3] &= ~(CPUID_ACPI | CPUID_TM);
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