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[PATCH v3 6/6] target/i386/sev: Replace qemu_map_ram_ptr with address_sp
From: |
Dov Murik |
Subject: |
[PATCH v3 6/6] target/i386/sev: Replace qemu_map_ram_ptr with address_space_map |
Date: |
Thu, 11 Nov 2021 10:00:48 +0000 |
Use address_space_map/unmap and check for errors.
Signed-off-by: Dov Murik <dovmurik@linux.ibm.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Acked-by: Brijesh Singh <brijesh.singh@amd.com>
---
target/i386/sev.c | 16 +++++++++++++---
1 file changed, 13 insertions(+), 3 deletions(-)
diff --git a/target/i386/sev.c b/target/i386/sev.c
index 4fd258a570..c21f526bf2 100644
--- a/target/i386/sev.c
+++ b/target/i386/sev.c
@@ -37,6 +37,7 @@
#include "qapi/qmp/qerror.h"
#include "exec/confidential-guest-support.h"
#include "hw/i386/pc.h"
+#include "exec/address-spaces.h"
#define TYPE_SEV_GUEST "sev-guest"
OBJECT_DECLARE_SIMPLE_TYPE(SevGuestState, SEV_GUEST)
@@ -1232,6 +1233,9 @@ bool sev_add_kernel_loader_hashes(SevKernelLoaderContext
*ctx, Error **errp)
uint8_t kernel_hash[HASH_SIZE];
uint8_t *hashp;
size_t hash_len = HASH_SIZE;
+ hwaddr mapped_len = sizeof(*padded_ht);
+ MemTxAttrs attrs = { 0 };
+ bool ret = true;
/*
* Only add the kernel hashes if the sev-guest configuration explicitly
@@ -1292,7 +1296,11 @@ bool sev_add_kernel_loader_hashes(SevKernelLoaderContext
*ctx, Error **errp)
* Populate the hashes table in the guest's memory at the OVMF-designated
* area for the SEV hashes table
*/
- padded_ht = qemu_map_ram_ptr(NULL, area->base);
+ padded_ht = address_space_map(&address_space_memory, area->base,
&mapped_len, true, attrs);
+ if (!padded_ht || mapped_len != sizeof(*padded_ht)) {
+ error_setg(errp, "SEV: cannot map hashes table guest memory area");
+ return false;
+ }
ht = &padded_ht->ht;
ht->guid = sev_hash_table_header_guid;
@@ -1314,10 +1322,12 @@ bool
sev_add_kernel_loader_hashes(SevKernelLoaderContext *ctx, Error **errp)
memset(padded_ht->padding, 0, sizeof(padded_ht->padding));
if (sev_encrypt_flash((uint8_t *)padded_ht, sizeof(*padded_ht), errp) < 0)
{
- return false;
+ ret = false;
}
- return true;
+ address_space_unmap(&address_space_memory, padded_ht, mapped_len, true,
mapped_len);
+
+ return ret;
}
static void
--
2.25.1
- [PATCH v3 0/6] SEV: add kernel-hashes=on for measured -kernel launch, Dov Murik, 2021/11/11
- [PATCH v3 3/6] target/i386/sev: Rephrase error message when no hashes table in guest firmware, Dov Murik, 2021/11/11
- [PATCH v3 6/6] target/i386/sev: Replace qemu_map_ram_ptr with address_space_map,
Dov Murik <=
- [PATCH v3 5/6] target/i386/sev: Perform padding calculations at compile-time, Dov Murik, 2021/11/11
- [PATCH v3 2/6] target/i386/sev: Add kernel hashes only if sev-guest.kernel-hashes=on, Dov Murik, 2021/11/11
- [PATCH v3 1/6] qapi/qom, target/i386: sev-guest: Introduce kernel-hashes=on|off option, Dov Murik, 2021/11/11
- [PATCH v3 4/6] target/i386/sev: Fail when invalid hashes table area detected, Dov Murik, 2021/11/11
- Re: [PATCH v3 0/6] SEV: add kernel-hashes=on for measured -kernel launch, Dov Murik, 2021/11/14