From 660e7dc57899e79e85c19baa93be009b0382ae8e Mon Sep 17 00:00:00 2001

From: Gary R Hook <ghook@redhat.com>

Date: Wed, 10 Apr 2019 00:08:03 +0100

Subject: [PATCH 3/5] target/i386: sev: Do not pin the ram device memory region

RH-Author: Gary R Hook <ghook@redhat.com>

Message-id: <20190410000803.1744-3-ghook@redhat.com>

Patchwork-id: 85542

O-Subject: [RHEL-8.1 virt 2/2] target/i386: sev: Do not pin the ram device memory region

Bugzilla: 1667249

RH-Acked-by: Eduardo Habkost <ehabkost@redhat.com>

RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>

RH-Acked-by: Alex Williamson <alex.williamson@redhat.com>

BZ: 1667249

Branch: rhel-8.1.0

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

Upstream Status: 4.0.0-rc1

Build Info: https://brewweb.engineering.redhat.com/brew/taskinfo?taskID=20980582

Conflicts: None

commit cedc0ad539afbbb669dba9e73dfad2915bc1c25b

Author: Singh, Brijesh <brijesh.singh@amd.com>

Date:   Mon Feb 4 22:23:40 2019 +0000

    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: Brijesh Singh <brijesh.singh@amd.com>

    Message-Id: <20190204222322.26766-3-brijesh.singh@amd.com>

    Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

Cc: Paolo Bonzini <pbonzini@redhat.com>

Cc: Richard Henderson <rth@twiddle.net>

Cc: Eduardo Habkost <ehabkost@redhat.com>

Cc: qemu-devel@nongnu.org

Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>

---

 target/i386/sev.c | 11 +++++++++++

 1 file changed, 11 insertions(+)

diff --git a/target/i386/sev.c b/target/i386/sev.c

index 2395171..b8009b0 100644

--- a/target/i386/sev.c

+++ b/target/i386/sev.c

@@ -130,6 +130,17 @@ 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;

-- 

1.8.3.1