[PATCH v2 13/17] x86/xen: enable Hygon support to Xen

[Pu Wen <puwen@xxxxxxxx>]

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@xxxxxxxx>
---
 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