[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [PATCH 05/14] x86/xstate: Map/unmap xsave area in xstate_set_init() and handle_setbv()
No functional change. Signed-off-by: Alejandro Vallejo <alejandro.vallejo@xxxxxxxxx> --- xen/arch/x86/xstate.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/xen/arch/x86/xstate.c b/xen/arch/x86/xstate.c index af9e345a7ace..60e752a245ca 100644 --- a/xen/arch/x86/xstate.c +++ b/xen/arch/x86/xstate.c @@ -993,7 +993,12 @@ int handle_xsetbv(u32 index, u64 new_bv) clts(); if ( curr->fpu_dirtied ) - asm ( "stmxcsr %0" : "=m" (curr->arch.xsave_area->fpu_sse.mxcsr) ); + { + struct xsave_struct *xsave_area = vcpu_map_xsave_area(curr); + + asm ( "stmxcsr %0" : "=m" (xsave_area->fpu_sse.mxcsr) ); + vcpu_unmap_xsave_area(curr, xsave_area); + } else if ( xstate_all(curr) ) { /* See the comment in i387.c:vcpu_restore_fpu_eager(). */ @@ -1048,7 +1053,7 @@ void xstate_set_init(uint64_t mask) unsigned long cr0 = read_cr0(); unsigned long xcr0 = this_cpu(xcr0); struct vcpu *v = idle_vcpu[smp_processor_id()]; - struct xsave_struct *xstate = v->arch.xsave_area; + struct xsave_struct *xstate; if ( ~xfeature_mask & mask ) { @@ -1061,8 +1066,10 @@ void xstate_set_init(uint64_t mask) clts(); + xstate = vcpu_map_xsave_area(v); memset(&xstate->xsave_hdr, 0, sizeof(xstate->xsave_hdr)); xrstor(v, mask); + vcpu_unmap_xsave_area(v, xstate); if ( cr0 & X86_CR0_TS ) write_cr0(cr0); -- 2.47.0
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