diff options
| -rw-r--r-- | arch/x86/xen/setup.c | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c index 2137c5101dac..dd5f905e33d5 100644 --- a/arch/x86/xen/setup.c +++ b/arch/x86/xen/setup.c @@ -27,6 +27,7 @@ #include <xen/interface/memory.h> #include <xen/interface/physdev.h> #include <xen/features.h> +#include "mmu.h" #include "xen-ops.h" #include "vdso.h" @@ -81,6 +82,9 @@ static void __init xen_add_extra_mem(u64 start, u64 size) memblock_reserve(start, size); + if (xen_feature(XENFEAT_auto_translated_physmap)) + return; + xen_max_p2m_pfn = PFN_DOWN(start + size); for (pfn = PFN_DOWN(start); pfn < xen_max_p2m_pfn; pfn++) { unsigned long mfn = pfn_to_mfn(pfn); @@ -103,6 +107,7 @@ static unsigned long __init xen_do_chunk(unsigned long start, .domid = DOMID_SELF }; unsigned long len = 0; + int xlated_phys = xen_feature(XENFEAT_auto_translated_physmap); unsigned long pfn; int ret; @@ -116,7 +121,7 @@ static unsigned long __init xen_do_chunk(unsigned long start, continue; frame = mfn; } else { - if (mfn != INVALID_P2M_ENTRY) + if (!xlated_phys && mfn != INVALID_P2M_ENTRY) continue; frame = pfn; } @@ -154,6 +159,13 @@ static unsigned long __init xen_do_chunk(unsigned long start, static unsigned long __init xen_release_chunk(unsigned long start, unsigned long end) { + /* + * Xen already ballooned out the E820 non RAM regions for us + * and set them up properly in EPT. + */ + if (xen_feature(XENFEAT_auto_translated_physmap)) + return end - start; + return xen_do_chunk(start, end, true); } @@ -222,7 +234,13 @@ static void __init xen_set_identity_and_release_chunk( * (except for the ISA region which must be 1:1 mapped) to * release the refcounts (in Xen) on the original frames. */ - for (pfn = start_pfn; pfn <= max_pfn_mapped && pfn < end_pfn; pfn++) { + + /* + * PVH E820 matches the hypervisor's P2M which means we need to + * account for the proper values of *release and *identity. + */ + for (pfn = start_pfn; !xen_feature(XENFEAT_auto_translated_physmap) && + pfn <= max_pfn_mapped && pfn < end_pfn; pfn++) { pte_t pte = __pte_ma(0); if (pfn < PFN_UP(ISA_END_ADDRESS)) |
