xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

[SPARC64]: Sanitize %pstate writes for sun4v.

Browse Source 
If we're just switching between different alternate global
sets, nop it out on sun4v.  Also, get rid of all of the
alternate global save/restore in the OBP CIF trampoline code.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
2006-02-05 22:27:28 -08:00
parent 314981ac71
commit 45fec05f80
7 changed files with 88 additions and 206 deletions
Download Patch File Download Diff File Expand all files Collapse all files

26
arch/sparc64/kernel/setup.c
View File

@@ -547,19 +547,33 @@ static void __init per_cpu_patch(void)
static void __init gl_patch(void)
{
struct gl_1insn_patch_entry *p;
struct gl_1insn_patch_entry *p1;
struct gl_2insn_patch_entry *p2;
if (tlb_type != hypervisor)
return;
p = &__gl_1insn_patch;
while (p < &__gl_1insn_patch_end) {
unsigned long addr = p->addr;
p1 = &__gl_1insn_patch;
while (p1 < &__gl_1insn_patch_end) {
unsigned long addr = p1->addr;
*(unsigned int *) (addr + 0) = p->insn;
*(unsigned int *) (addr + 0) = p1->insn;
__asm__ __volatile__("flush %0" : : "r" (addr + 0));
p++;
p1++;
}
p2 = &__gl_2insn_patch;
while (p2 < &__gl_2insn_patch_end) {
unsigned long addr = p2->addr;
*(unsigned int *) (addr + 0) = p2->insns[0];
__asm__ __volatile__("flush %0" : : "r" (addr + 0));
*(unsigned int *) (addr + 3) = p2->insns[1];
__asm__ __volatile__("flush %0" : : "r" (addr + 4));
p2++;
}
}