lkml.org 
[lkml]   [2018]   [Jul]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v2 13/17] x86/xen: enable Hygon support to Xen
Date
To make Xen work correctly on Hygon platforms, reuse AMD's Xen support
code path and add vendor check for Hygon along with AMD.

Signed-off-by: Pu Wen <puwen@hygon.cn>
---
arch/x86/xen/pmu.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/arch/x86/xen/pmu.c b/arch/x86/xen/pmu.c
index 7d00d4a..e2bee70 100644
--- a/arch/x86/xen/pmu.c
+++ b/arch/x86/xen/pmu.c
@@ -68,7 +68,8 @@ static __read_mostly int intel_num_arch_counters, intel_num_fixed_counters;

static void xen_pmu_arch_init(void)
{
- if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD) {
+ if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD ||
+ boot_cpu_data.x86_vendor == X86_VENDOR_HYGON) {

switch (boot_cpu_data.x86) {
case 0x15:
@@ -285,7 +286,8 @@ static bool xen_amd_pmu_emulate(unsigned int msr, u64 *val, bool is_read)

bool pmu_msr_read(unsigned int msr, uint64_t *val, int *err)
{
- if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD) {
+ if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD ||
+ boot_cpu_data.x86_vendor == X86_VENDOR_HYGON) {
if (is_amd_pmu_msr(msr)) {
if (!xen_amd_pmu_emulate(msr, val, 1))
*val = native_read_msr_safe(msr, err);
@@ -308,7 +310,8 @@ bool pmu_msr_write(unsigned int msr, uint32_t low, uint32_t high, int *err)
{
uint64_t val = ((uint64_t)high << 32) | low;

- if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD) {
+ if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD ||
+ boot_cpu_data.x86_vendor == X86_VENDOR_HYGON) {
if (is_amd_pmu_msr(msr)) {
if (!xen_amd_pmu_emulate(msr, &val, 0))
*err = native_write_msr_safe(msr, low, high);
@@ -379,7 +382,8 @@ static unsigned long long xen_intel_read_pmc(int counter)

unsigned long long xen_read_pmc(int counter)
{
- if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD)
+ if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD ||
+ boot_cpu_data.x86_vendor == X86_VENDOR_HYGON)
return xen_amd_read_pmc(counter);
else
return xen_intel_read_pmc(counter);
--
2.7.4
\
 
 \ /
  Last update: 2018-07-23 15:29    [W:0.162 / U:1.736 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site