[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen-unstable] [HVM] Only treat gfns in known MMIO regions as MMIO
# HG changeset patch # User Tim Deegan <Tim.Deegan@xxxxxxxxxxxxx> # Date 1172241847 0 # Node ID 2c3a13993b0d1c6b374e96c5a365fe615dca2f72 # Parent eb3ebf11abfe06232495d5a1d2fc90b1ebafb9e2 [HVM] Only treat gfns in known MMIO regions as MMIO instead of assuming that all non-RAM addresses are MMIO Signed-off-by: Tim Deegan <Tim.Deegan@xxxxxxxxxxxxx> --- xen/arch/x86/mm/shadow/multi.c | 3 ++- xen/include/asm-x86/p2m.h | 6 +++--- 2 files changed, 5 insertions(+), 4 deletions(-) diff -r eb3ebf11abfe -r 2c3a13993b0d xen/arch/x86/mm/shadow/multi.c --- a/xen/arch/x86/mm/shadow/multi.c Fri Feb 23 14:36:33 2007 +0000 +++ b/xen/arch/x86/mm/shadow/multi.c Fri Feb 23 14:44:07 2007 +0000 @@ -2394,7 +2394,8 @@ static int validate_gl1e(struct vcpu *v, gfn = guest_l1e_get_gfn(*new_gl1e); gmfn = vcpu_gfn_to_mfn(v, gfn); - mmio = (is_hvm_vcpu(v) && paging_vcpu_mode_translate(v) && !mfn_valid(gmfn)); + mmio = (is_hvm_vcpu(v) && paging_vcpu_mode_translate(v) && + mmio_space(gfn_to_paddr(gfn))); l1e_propagate_from_guest(v, new_gl1e, _mfn(INVALID_MFN), gmfn, &new_sl1e, ft_prefetch, mmio); diff -r eb3ebf11abfe -r 2c3a13993b0d xen/include/asm-x86/p2m.h --- a/xen/include/asm-x86/p2m.h Fri Feb 23 14:36:33 2007 +0000 +++ b/xen/include/asm-x86/p2m.h Fri Feb 23 14:44:07 2007 +0000 @@ -86,11 +86,11 @@ static inline unsigned long get_mfn_from return mfn_x(gfn_to_mfn_current(pfn)); } -/* Is this guest address an mmio one? (i.e. not defined in p2m map) */ +/* Is this guest address an mmio one? */ static inline int mmio_space(paddr_t gpa) { - unsigned long gfn = gpa >> PAGE_SHIFT; - return !mfn_valid(mfn_x(gfn_to_mfn_current(gfn))); + return (gpa >= 0xf0000000 /* 256MB hole just below 4GB */ + || (gpa >= 0xa0000 && gpa < 0xc0000)); /* VGA hole */ } /* Translate the frame number held in an l1e from guest to machine */ _______________________________________________ Xen-changelog mailing list Xen-changelog@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-changelog
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