[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH 2/6] X86: expose Intel new features to dom0
>>> On 24.11.11 at 17:28, Konrad Rzeszutek Wilk <konrad@xxxxxxxxxx> wrote: > On Thu, Nov 24, 2011 at 11:51:37PM +0800, Liu, Jinsong wrote: >> X86: expose Intel new features to dom0 >> >> This patch expose Intel new features to dom0, including > FMA/AVX2/BMI1/BMI2/LZCNT/MOVBE. > > And has it been tested with 3.1 pvops kernel? > Does it need a patch in the pvops kernel as well? No - these are all unprivileged instructions not requiring any OS support. Jan >> >> Signed-off-by: Liu, Jinsong <jinsong.liu@xxxxxxxxx> >> >> diff -r 38b25f3b2bca xen/arch/x86/traps.c >> --- a/xen/arch/x86/traps.c Thu Nov 17 17:54:17 2011 +0800 >> +++ b/xen/arch/x86/traps.c Thu Nov 17 18:06:01 2011 +0800 >> @@ -826,8 +826,11 @@ static void pv_cpuid(struct cpu_user_reg >> >> case 0x00000007: >> if ( regs->ecx == 0 ) >> - b &= (cpufeat_mask(X86_FEATURE_FSGSBASE) | >> - cpufeat_mask(X86_FEATURE_ERMS)); >> + b &= (cpufeat_mask(X86_FEATURE_BMI1) | >> + cpufeat_mask(X86_FEATURE_AVX2) | >> + cpufeat_mask(X86_FEATURE_BMI2) | >> + cpufeat_mask(X86_FEATURE_ERMS) | >> + cpufeat_mask(X86_FEATURE_FSGSBASE)); >> else >> b = 0; >> a = c = d = 0; >> diff -r 38b25f3b2bca xen/include/asm-x86/cpufeature.h >> --- a/xen/include/asm-x86/cpufeature.h Thu Nov 17 17:54:17 2011 +0800 >> +++ b/xen/include/asm-x86/cpufeature.h Thu Nov 17 18:06:01 2011 +0800 >> @@ -93,6 +93,7 @@ >> #define X86_FEATURE_TM2 (4*32+ 8) /* Thermal Monitor 2 */ >> #define X86_FEATURE_SSSE3 (4*32+ 9) /* Supplemental Streaming SIMD > Extensions-3 */ >> #define X86_FEATURE_CID (4*32+10) /* Context ID */ >> +#define X86_FEATURE_FMA (4*32+12) /* Fused Multiply Add */ >> #define X86_FEATURE_CX16 (4*32+13) /* CMPXCHG16B */ >> #define X86_FEATURE_XTPR (4*32+14) /* Send Task Priority Messages */ >> #define X86_FEATURE_PDCM (4*32+15) /* Perf/Debug Capability MSR */ >> @@ -100,6 +101,7 @@ >> #define X86_FEATURE_SSE4_1 (4*32+19) /* Streaming SIMD Extensions 4.1 */ >> #define X86_FEATURE_SSE4_2 (4*32+20) /* Streaming SIMD Extensions 4.2 */ >> #define X86_FEATURE_X2APIC (4*32+21) /* Extended xAPIC */ >> +#define X86_FEATURE_MOVBE (4*32+22) /* movbe instruction */ >> #define X86_FEATURE_POPCNT (4*32+23) /* POPCNT instruction */ >> #define X86_FEATURE_TSC_DEADLINE (4*32+24) /* "tdt" TSC Deadline Timer */ >> #define X86_FEATURE_AES (4*32+25) /* AES instructions */ >> @@ -145,7 +147,10 @@ >> >> /* Intel-defined CPU features, CPUID level 0x00000007:0 (ebx), word 7 */ >> #define X86_FEATURE_FSGSBASE (7*32+ 0) /* {RD,WR}{FS,GS}BASE >> instructions */ >> +#define X86_FEATURE_BMI1 (7*32+ 3) /* 1st bit manipulation extensions */ >> +#define X86_FEATURE_AVX2 (7*32+ 5) /* AVX2 instructions */ >> #define X86_FEATURE_SMEP (7*32+ 7) /* Supervisor Mode Execution >> Protection > */ >> +#define X86_FEATURE_BMI2 (7*32+ 8) /* 2nd bit manipulation extensions */ >> #define X86_FEATURE_ERMS (7*32+ 9) /* Enhanced REP MOVSB/STOSB */ >> >> #define cpu_has(c, bit) test_bit(bit, (c)->x86_capability) > >> _______________________________________________ >> Xen-devel mailing list >> Xen-devel@xxxxxxxxxxxxxxxxxxx >> http://lists.xensource.com/xen-devel _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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