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From b150f14fa8adcfe255c0380427e31d033bd44789 Mon Sep 17 00:00:00 2001
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From: Alex Williamson <alex.williamson@redhat.com>
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Date: Mon, 22 Jul 2019 18:09:47 +0100
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Subject: [PATCH 21/39] target/i386: sev: Do not unpin ram device memory region
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RH-Author: Alex Williamson <alex.williamson@redhat.com>
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Message-id: <156381893103.14196.5165276806848335745.stgit@gimli.home>
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Patchwork-id: 89617
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O-Subject: [RHEL-8.1 qemu-kvm PATCH] target/i386: sev: Do not unpin ram device memory region
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Bugzilla: 1728958
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RH-Acked-by: Eduardo Habkost <ehabkost@redhat.com>
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RH-Acked-by: Auger Eric <eric.auger@redhat.com>
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RH-Acked-by: Laszlo Ersek <lersek@redhat.com>
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Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1728958
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Brew: https://brewweb.engineering.redhat.com/brew/taskinfo?taskID=22722091
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Branch: rhel-8.1.0
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The commit referenced below skipped pinning ram device memory when
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ram blocks are added, we need to do the same when they're removed.
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Cc: Brijesh Singh <brijesh.singh@amd.com>
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Cc: Paolo Bonzini <pbonzini@redhat.com>
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Fixes: cedc0ad539af ("target/i386: sev: Do not pin the ram device memory region")
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Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
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Message-Id: <156320087103.2556.10983987500488190423.stgit@gimli.home>
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Reviewed-by: Singh, Brijesh <brijesh.singh@amd.com>
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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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(cherry picked from commit 56e2ec9488b3b281130e064929f8ae5595d6ac39)
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Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
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---
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target/i386/sev.c | 11 +++++++++++
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1 file changed, 11 insertions(+)
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diff --git a/target/i386/sev.c b/target/i386/sev.c
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index b8009b0..7051a30 100644
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--- a/target/i386/sev.c
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+++ b/target/i386/sev.c
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@@ -159,6 +159,17 @@ sev_ram_block_removed(RAMBlockNotifier *n, void *host, size_t size)
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{
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int r;
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struct kvm_enc_region range;
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+ ram_addr_t offset;
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+ MemoryRegion *mr;
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+
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+ /*
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+ * The RAM device presents a memory region that should be treated
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+ * as IO region and should not have been pinned.
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+ */
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+ mr = memory_region_from_host(host, &offset);
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+ if (mr && memory_region_is_ram_device(mr)) {
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+ return;
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+ }
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range.addr = (__u64)(unsigned long)host;
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range.size = size;
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--
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1.8.3.1
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