Commit cedc0ad5 authored by Singh, Brijesh's avatar Singh, Brijesh Committed by Paolo Bonzini
Browse files

target/i386: sev: Do not pin the ram device memory region 

The RAM device presents a memory region that should be handled
as an IO region and should not be pinned.

In the case of the vfio-pci, RAM device represents a MMIO BAR
and the memory region is not backed by pages hence
KVM_MEMORY_ENCRYPT_REG_REGION fails to lock the memory range.

Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1667249


Cc: Alex Williamson <alex.williamson@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: default avatarBrijesh Singh <brijesh.singh@amd.com>
Message-Id: <20190204222322.26766-3-brijesh.singh@amd.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 2ddb89b0

target/i386/sev.c

+11 −0
Original line number Diff line number Diff line
@@ -131,6 +131,17 @@ sev_ram_block_added(RAMBlockNotifier *n, void *host, size_t size) 
{

    int r;

    struct kvm_enc_region range;

    ram_addr_t offset;

    MemoryRegion *mr;



    /*

     * The RAM device presents a memory region that should be treated

     * as IO region and should not be pinned.

     */

    mr = memory_region_from_host(host, &offset);

    if (mr && memory_region_is_ram_device(mr)) {

        return;

    }



    range.addr = (__u64)(unsigned long)host;

    range.size = size;