3ab5d775a1
OBS-URL: https://build.opensuse.org/package/show/Virtualization/xen?expand=0&rev=4293852b248e1f267831a4305b1c05a9
91 lines
3.4 KiB
Diff
91 lines
3.4 KiB
Diff
# HG changeset patch
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# User Keir Fraser <keir.fraser@citrix.com>
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# Date 1277831922 -3600
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# Node ID c5f3fe17374cead91fdaa94f60cf7b3115eaa091
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# Parent 2a3a5979e3f16d77f5b526050c45acba186482b0
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trace: share t_info pages only in read-only mode
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There's no need to share writably the t_info pages (Dom0 only wants
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[and needs] to read it)
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Signed-off-by: Jan Beulich <jbeulich@novell.com>
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Acked-by: George Dunlap <george.dunlap@eu.citrix.com>
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--- a/tools/xenmon/xenbaked.c
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+++ b/tools/xenmon/xenbaked.c
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@@ -84,7 +84,7 @@ typedef struct settings_st {
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} settings_t;
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struct t_struct {
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- struct t_info *t_info; /* Structure with information about individual buffers */
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+ const struct t_info *t_info; /* Structure with information about individual buffers */
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struct t_buf **meta; /* Pointers to trace buffer metadata */
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unsigned char **data; /* Pointers to trace buffer data areas */
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};
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@@ -376,9 +376,8 @@ static struct t_struct *map_tbufs(unsign
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}
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/* Map t_info metadata structure */
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- tbufs.t_info = xc_map_foreign_range(xc_handle, DOMID_XEN,
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- tinfo_size, PROT_READ | PROT_WRITE,
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- tbufs_mfn);
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+ tbufs.t_info = xc_map_foreign_range(xc_handle, DOMID_XEN, tinfo_size,
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+ PROT_READ, tbufs_mfn);
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if ( tbufs.t_info == 0 )
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{
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@@ -404,7 +403,8 @@ static struct t_struct *map_tbufs(unsign
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for(i=0; i<num; i++)
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{
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- uint32_t *mfn_list = ((uint32_t *)tbufs.t_info) + tbufs.t_info->mfn_offset[i];
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+ const uint32_t *mfn_list = (const uint32_t *)tbufs.t_info
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+ + tbufs.t_info->mfn_offset[i];
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int j;
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xen_pfn_t pfn_list[tbufs.t_info->tbuf_size];
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--- a/tools/xentrace/xentrace.c
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+++ b/tools/xentrace/xentrace.c
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@@ -62,7 +62,7 @@ typedef struct settings_st {
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} settings_t;
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struct t_struct {
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- struct t_info *t_info; /* Structure with information about individual buffers */
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+ const struct t_info *t_info; /* Structure with information about individual buffers */
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struct t_buf **meta; /* Pointers to trace buffer metadata */
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unsigned char **data; /* Pointers to trace buffer data areas */
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};
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@@ -459,9 +459,8 @@ static struct t_struct *map_tbufs(unsign
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int i;
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/* Map t_info metadata structure */
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- tbufs.t_info = xc_map_foreign_range(xc_handle, DOMID_XEN,
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- tinfo_size, PROT_READ | PROT_WRITE,
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- tbufs_mfn);
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+ tbufs.t_info = xc_map_foreign_range(xc_handle, DOMID_XEN, tinfo_size,
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+ PROT_READ, tbufs_mfn);
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if ( tbufs.t_info == 0 )
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{
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@@ -487,7 +486,8 @@ static struct t_struct *map_tbufs(unsign
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for(i=0; i<num; i++)
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{
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- uint32_t *mfn_list = ((uint32_t *)tbufs.t_info) + tbufs.t_info->mfn_offset[i];
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+ const uint32_t *mfn_list = (const uint32_t *)tbufs.t_info
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+ + tbufs.t_info->mfn_offset[i];
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int j;
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xen_pfn_t pfn_list[tbufs.t_info->tbuf_size];
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--- a/xen/common/trace.c
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+++ b/xen/common/trace.c
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@@ -322,7 +322,7 @@ void __init init_trace_bufs(void)
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for(i=0; i<T_INFO_PAGES; i++)
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share_xen_page_with_privileged_guests(
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- virt_to_page(t_info) + i, XENSHARE_writable);
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+ virt_to_page(t_info) + i, XENSHARE_readonly);
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if ( opt_tbuf_size == 0 )
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{
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