From: David Hildenbrand <[email protected]> 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 <[email protected]> Cc: "Michael S. Tsirkin" <[email protected]> Cc: Paolo Bonzini <[email protected]> Cc: Richard Henderson <[email protected]> Cc: Eduardo Habkost <[email protected]> Signed-off-by: David Hildenbrand <[email protected]> Message-Id: <[email protected]> Reviewed-by: Michael S. Tsirkin <[email protected]> Signed-off-by: Michael S. Tsirkin <[email protected]> --- target/i386/sev.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/target/i386/sev.c b/target/i386/sev.c index d273174ad3..f100a53231 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; } -- MST
