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
---
target/i386/sev.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/target/i386/sev.c b/target/i386/sev.c
index 2395171acf..b8009b001a 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;
--
2.18.1
On Tue, Apr 09, 2019 at 08:08:03PM -0400, Gary R Hook wrote: > 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 Acked-by: Eduardo Habkost <ehabkost@redhat.com> -- Eduardo
----- Original Message -----
> From: "Gary R Hook" <ghook@redhat.com>
> To: rhvirt-patches@redhat.com
> Cc: qemu-devel@nongnu.org, "Paolo Bonzini" <pbonzini@redhat.com>, ghook@redhat.com, "Eduardo Habkost"
> <ehabkost@redhat.com>, "Richard Henderson" <rth@twiddle.net>
> Sent: Tuesday, April 9, 2019 7:08:03 PM
> Subject: [RHEL-8.1 virt 2/2] target/i386: sev: Do not pin the ram device memory region
>
> 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
NACKed-by: Gary R Hook <ghook@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 2395171acf..b8009b001a 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;
> --
> 2.18.1
>
>
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