[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [V10 0/3] add xsaves/xrstors support
From: Shuai Ruan <shuai.ruan@xxxxxxxxx> Changes in v10: * Address comments from Jan: * Add two new macros to handle alternative asm with fixup code in patch1. * Fix a coding style error in patch2. Changes in v9: * Address comments from Jan: * Add msr_ia32_xss save/restor support in patch2. * Change xrstor to alternative asm in patch1. * Use memcpy() copy the save header to avoid one ugly cast in patch1. * Fix coding style errors. Changes in v8: * Address comments from Jan/Andrew: * Add optimisation in set_msr_xss in patch1. * Change from black listing feature to white listing in pv_cpuid in patch2. * Add MSR_IA32_XSS save/restore support in patch2. * Fix some code errors and coding style errors. Changes in v7: * Address comments from Jan/Andrew: * Move macro XSTATE_FIXUP into patch3. * Change lazy write to xss_msr in patch1. * Drop inner set of brackets and stray cast in patch2. * Move the condition and memcpy() wouldn't into the new called functions in patch2. * Rebase patch4 base on Andrew's"tools/libxc: Improve efficiency of xc_cpuid_apply_policy()". * For no XSS features are currently supported.For leaf 2...63,ecx remain zero at the moment in patch4. Changes in v6: * Address comments from Jan. * Rebase the code based on Andrew'patch "xen/x86: Record xsave features in c->x86_capabilities". * Re-split the patch to avoid building errors. Move some func definitions from patch1 to patch2. * Change func name load/save_xsave_states to compress/expand_xsave_states in patch2. * Add macro to handle redundancy in xrstor. * Fix some code errors and coding style errors. * Add some descriptions in commit message. Changes in v5: * Address comments from Andrew/Jan,mainly: * Add lazy writes of the xss_msr. * Add xsave_area check when save/restore guest. * Add xsavec support. * Use word 2 in xen/include/asm-x86/cpufeature.h. * Fix some code errors. Changes in v4: * Address comments from Andrew, mainly: * No xsaves suporting for pv guest. * Using xstate_sizes instead of domain_cpuid in hvm_cupid in patch 3. * Add support for format translation when perform pv guest migration in patch 2. * Fix some code errors. Changes in v3: * Address comments from Jan/Konrad * Change the bits of eax/ebx/ecx/edx passed to guest in patch 4. * Add code to verify whether host supports xsaves or not in patch 1. Changes in v2: * Address comments from Andrew/chao/Jan, mainly: * Add details information of xsaves/xrstors feature. * Test migration between xsaves-support machine and none-xsaves-support machine * Remove XGETBV1/XSAVEC/XSAVEOPT out of 'else' in patch 3. * Change macro name XGETBV to XGETBV1 in patch 4. This patchset enable xsaves/xrstors feature which will be available on Intel Skylake and later platform. Like xsave/xrstor, xsaves/xrstors feature will save and load processor state from a region of memory called XSAVE area. While unlike xsave/xrstor, xsaves/xrstors: a) use the compacted format only for the extended region of the XSAVE area which saves memory for you; b) can operate on supervisor state components so the feature is prerequisite to support new supervisor state components; c) execute only if CPL=0. Detail hardware spec can be found in chapter 13 (section 13.11 13.12) of the Intel SDM [1]. [1] Intel SDM (http://www.intel.com/content/dam/www/public/us/en/documents/manuals/64-ia-32-architectures-software-developer-manual-325462.pdf) Shuai Ruan (3): x86/xsaves: enable xsaves/xrstors/xsavec in xen x86/xsaves: enable xsaves/xrstors for hvm guest libxc: expose xsaves/xgetbv1/xsavec to hvm guest tools/libxc/xc_cpuid_x86.c | 10 +- xen/arch/x86/domain.c | 8 ++ xen/arch/x86/domctl.c | 30 ++++- xen/arch/x86/hvm/hvm.c | 45 ++++++- xen/arch/x86/hvm/vmx/vmcs.c | 5 +- xen/arch/x86/hvm/vmx/vmx.c | 35 +++++- xen/arch/x86/i387.c | 4 + xen/arch/x86/traps.c | 6 +- xen/arch/x86/xstate.c | 242 ++++++++++++++++++++++++++++++++----- xen/include/asm-x86/alternative.h | 8 ++ xen/include/asm-x86/hvm/vmx/vmcs.h | 4 + xen/include/asm-x86/hvm/vmx/vmx.h | 2 + xen/include/asm-x86/xstate.h | 3 + 13 files changed, 354 insertions(+), 48 deletions(-) -- 1.9.1 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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