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| author | David Hildenbrand <david@redhat.com> | 2020-06-26 09:22:34 +0200 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2020-07-02 05:54:59 -0400 |
| commit | fee3f3baff12e78f544db51cc16ef028b8fe03a9 (patch) | |
| tree | 6f48a322b5befb91361bf2cc009c4ac1a055aca3 | |
| parent | 06df2e692a95509ee5f6e7d1663502adb74cb2a5 (diff) | |
| download | qemu-fee3f3baff12e78f544db51cc16ef028b8fe03a9.zip qemu-fee3f3baff12e78f544db51cc16ef028b8fe03a9.tar.gz qemu-fee3f3baff12e78f544db51cc16ef028b8fe03a9.tar.bz2 | |
target/i386: sev: Use ram_block_discard_disable()
AMD SEV will pin all guest memory, mark discarding of RAM broken. At the
time this is called, we cannot have anyone active that relies on discards
to work properly - let's still implement error handling.
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20200626072248.78761-8-david@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
| -rw-r--r-- | target/i386/sev.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/target/i386/sev.c b/target/i386/sev.c index d273174..f100a53 100644 --- a/target/i386/sev.c +++ b/target/i386/sev.c @@ -680,6 +680,12 @@ sev_guest_init(const char *id) uint32_t host_cbitpos; struct sev_user_data_status status = {}; + ret = ram_block_discard_disable(true); + if (ret) { + error_report("%s: cannot disable RAM discard", __func__); + return NULL; + } + sev = lookup_sev_guest_info(id); if (!sev) { error_report("%s: '%s' is not a valid '%s' object", @@ -751,6 +757,7 @@ sev_guest_init(const char *id) return sev; err: sev_guest = NULL; + ram_block_discard_disable(false); return NULL; } |