From ffc1e7f1549a5715018579ef3c02b0c1a8da363f Mon Sep 17 00:00:00 2001 From: Keir Fraser Date: Mon, 2 Aug 2010 17:17:55 +0100 Subject: [PATCH] xenpaging: Add a check to Xen for EPT. There isn't seem to be a way to directly check for EPT, so instead check for HAP and an Intel processor. If EPT isn't enabled, then return an error to the tool. Signed-off-by: Patrick Colp xen-unstable changeset: 21882:af52102e4dcf xen-unstable date: Wed Jul 28 07:54:40 2010 +0100 --- xen/arch/x86/mm/mem_event.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/xen/arch/x86/mm/mem_event.c b/xen/arch/x86/mm/mem_event.c index 5584328dd6..68ba06c5b7 100644 --- a/xen/arch/x86/mm/mem_event.c +++ b/xen/arch/x86/mm/mem_event.c @@ -21,6 +21,7 @@ */ +#include #include #include #include @@ -225,6 +226,12 @@ int mem_event_domctl(struct domain *d, xen_domctl_mem_event_op_t *mec, mfn_t ring_mfn; mfn_t shared_mfn; + /* Currently only EPT is supported */ + rc = -ENODEV; + if ( !(is_hvm_domain(d) && d->arch.hvm_domain.hap_enabled && + (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL)) ) + break; + /* Get MFN of ring page */ guest_get_eff_l1e(v, ring_addr, &l1e); gfn = l1e_get_pfn(l1e); -- 2.39.5